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

Abstract

The invention is suitable for the technical field of batteries, and provides a battery device, a power utilization device, an energy storage device, an energy storage system and a charging network, and the battery device comprises a box body, a battery monomer assembly and a shunting structure. The battery monomer assembly comprises a plurality of rows of battery monomers arranged along the first direction, each row of battery monomers are arranged along the second direction, and at least one side of the shunting structure along the second direction is provided with the battery monomer assembly. The shunting structure is provided with a channel and a liquid inlet hole communicated with the channel, a plurality of liquid outlet holes communicated with the channel are formed in the side wall, facing the battery monomer assembly in the second direction, of the shunting structure, and the liquid inlet hole and the liquid outlet holes are distributed in the first direction. In the same side, in the second direction, of the flow dividing structure, in the first direction, the hole diameters of at least part of the liquid outlet holes in the multiple liquid outlet holes formed in the first direction at intervals are gradually increased. Therefore, in the first direction, the flow of the heat management liquid flowing to the plurality of rows of battery monomers through the plurality of liquid outlet holes is gradually increased, and the temperature uniformity of the battery device can be improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of batteries, and more particularly relates to a battery device, a power utilization device, an energy storage device, an energy storage system, and a charging network. BACKGROUND

[0002] In related technologies, a battery monomer generally includes a shell and an electrode assembly arranged in the shell, and the electrode assembly includes a main body and a tab connected to the main body.

[0003] In some cases, the temperature of the tab rises relatively high during use of the battery monomer. The heat on the tab is inevitably conducted to the main body, so that the temperature of the main body in the partial area close to the tab also rises relatively high, thereby the main body in the partial area close to the tab inevitably has a risk of temperature exceeding the temperature threshold of the main body. In this way, the overcurrent capacity of the battery monomer is inevitably affected, and thus the performance and service life of the battery monomer are affected.

[0004] The above statements are only used to provide background technical information related to the present application, and do not necessarily constitute the prior art. SUMMARY

[0005] In view of the above problems, the embodiments of the present application provide a battery device, a power utilization device, an energy storage device, an energy storage system, and a charging network, which can improve the technical problem of high temperature rise of the tab.

[0006] In a first aspect, the embodiments of the present application provide a battery device, comprising: a box body; a battery monomer assembly arranged at least partially in the box body; the battery monomer assembly includes a plurality of rows of battery monomers arranged along a first direction, and each row of battery monomers is arranged along a second direction; a shunt structure arranged at least partially in the box body, and the shunt structure has the battery monomer assembly on at least one side along the second direction; the shunt structure is provided with a channel and a liquid inlet hole communicated with the channel, and the shunt structure is provided with a plurality of liquid outlet holes communicated with the channel on the side wall facing the battery monomer assembly along the second direction; the liquid inlet hole and the liquid outlet hole are distributed along the first direction, and the first direction is the flow direction of the liquid in the channel; wherein, in the same side of the shunt structure along the second direction, at least part of the liquid outlet holes are arranged at intervals along the first direction, and in the first direction, the aperture of at least part of the liquid outlet holes among the liquid outlet holes arranged at intervals along the first direction gradually increases; the box body includes a bottom wall, and the battery monomer assembly is supported on the bottom wall along a third direction; a first partition is arranged in the channel, and the first partition divides the channel into a plurality of sub-channels distributed along the third direction, and the plurality of sub-channels include a first sub-channel and a second sub-channel distributed along the third direction; The plurality of liquid outlet holes includes a first liquid outlet hole and a second liquid outlet hole in the same side of the shunt structure along the second direction, the first liquid outlet hole is communicated with the first sub-channel, and the second liquid outlet hole is communicated with the second sub-channel. The first direction, the second direction and the third direction are perpendicular to each other.

[0007] The battery device provided by the embodiment of the application is characterized in that, in the same side of the shunt structure along the second direction, in the first direction, the hole diameter of at least part of the plurality of liquid outlet holes arranged at intervals in the first direction gradually increases, so that the flow rate of the heat management liquid flowing out of the liquid outlet holes gradually increases in the first direction, that is, the flow rate of the heat management liquid flowing to the plurality of battery monomers in the first direction gradually increases, and thus the heat exchange efficiency between the heat management liquid and the battery monomers gradually increases in the first direction. In this way, the temperature difference between the plurality of battery monomers can be reduced, and the temperature uniformity of the battery device can be improved.

[0008] In some embodiments, in the same side of the shunt structure along the second direction, in the first direction, the distance between at least part of the plurality of liquid outlet holes arranged at intervals in the first direction and the bottom wall gradually decreases.

[0009] By adopting the above technical solution, when the heat management liquid enters the channel through the liquid inlet hole, the heat management liquid can quickly flow to the liquid outlet hole close to the rear row of battery monomers in the first direction. In this way, the problem that the heat management liquid in the channel first flows to the liquid outlet hole close to the front row of battery monomers in the first direction, resulting in vortex phenomenon around the liquid outlet hole and making it difficult for the heat management liquid to flow to the liquid outlet hole close to the rear row of battery monomers in the first direction, can be improved. In this way, the effect that the flow rate of the heat management liquid flowing to the plurality of battery monomers in the first direction gradually increases can be achieved, and thus the effect that the heat exchange efficiency between the heat management liquid and the battery monomers gradually increases in the first direction can be achieved, thereby further improving the temperature uniformity of the battery device.

[0010] In some embodiments, the hole diameter of the second liquid outlet hole is greater than the hole diameter of the first liquid outlet hole.

[0011] In this way, the flow rate of the thermal management liquid in the second sub-channel flowing through the second liquid outlet to the battery cells can be greater than the flow rate of the thermal management liquid in the first sub-channel flowing through the first liquid outlet to the battery cells, so that the efficiency of the thermal management liquid flowing out of the second sub-channel and exchanging heat with the battery cells can be higher than the efficiency of the thermal management liquid flowing out of the first sub-channel and exchanging heat with the battery cells. This helps to reduce the temperature difference between the front row of battery cells and the rear row of battery cells, that is, reduce the temperature difference between the multiple sections of battery cells corresponding to the multiple sub-channels, thereby improving the temperature uniformity of the multiple sections of battery cells corresponding to the multiple sub-channels, and thus improving the temperature uniformity of the battery device.

[0012] In some embodiments, on the same side of the diversion structure along the second direction, the branch channel is connected to a plurality of liquid outlet holes, and among the plurality of liquid outlet holes connected to the branch channel, at least some of the liquid outlet holes are spaced apart along the first direction, and in the first direction, the apertures of at least some of the plurality of liquid outlet holes spaced apart along the first direction gradually increase.

[0013] By adopting the above technical solution, the flow rate of the thermal management liquid in each sub-channel flowing out through the liquid outlet in the first direction can be gradually increased. That is, in the first direction, the flow rate of the thermal management liquid in each sub-channel flowing through the multiple liquid outlets to the battery cell gradually increases. In this way, the efficiency of heat exchange between each battery cell section and the thermal management liquid in the first direction gradually increases among the multiple battery cells divided along the first direction of the battery cell assembly, thereby helping to reduce the temperature difference between each battery cell section, improve the temperature uniformity of each battery cell section, and thus improve the temperature uniformity of the battery device.

[0014] In some embodiments, on the same side of the diversion structure along the second direction, the branch channel is connected to a plurality of liquid outlet holes, and among the plurality of liquid outlet holes connected to the branch channel, at least some of the liquid outlet holes are spaced apart along the first direction. In the first direction, the distance between at least some of the plurality of liquid outlet holes spaced apart along the first direction and the bottom wall gradually decreases.

[0015] By adopting the above technical solution, when the thermal management liquid enters each sub-channel through the liquid inlet, it is facilitated to quickly flow to the liquid outlet of the sub-channel along the first direction near the rear row of battery cells. This can improve the problem that the thermal management liquid in the sub-channel first flows to the liquid outlet near the front row of battery cells along the first direction, causing vortexes around the liquid outlet, making it difficult for the thermal management liquid to flow to the liquid outlet of the sub-channel along the first direction near the rear row of battery cells. This arrangement facilitates achieving the effect of gradually increasing the flow rate of the thermal management liquid in each sub-channel flowing through the multiple liquid outlets to the multiple rows of battery cells in the first direction, thereby facilitating the gradual increase in the efficiency of heat exchange between each battery cell section and the thermal management liquid in the first direction in the multiple battery cells divided along the first direction of the battery cell assembly, thereby further reducing the temperature of each battery cell section, improving the temperature uniformity of each battery cell section, and improving the temperature uniformity of the battery device.

[0016] In some embodiments, in the third direction, the first sub-channel is located on a side of the second sub-channel away from the bottom wall.

[0017] By adopting the above technical solution, the thermal management liquid can quickly flow in the second branch channel to the second liquid outlet after entering the second branch channel through the second liquid inlet. In this way, it is possible to improve the problem that the thermal management liquid flows into the first branch channel through the first liquid inlet and then flows to the first liquid outlet, causing vortexes around the first liquid outlet, causing the thermal management liquid in the box to flow to the second branch channel through the second liquid outlet, making it difficult for the thermal management liquid to flow to the rear row of battery cells through the second liquid outlet. Such a setting allows the thermal management liquid to quickly enter the first branch channel and the second branch channel, and quickly flow through the first liquid outlet and the second liquid outlet to the battery cell assembly, thereby facilitating the gradual increase in the efficiency of heat exchange between the thermal management liquid and the battery cell in the first direction, thereby further improving the temperature uniformity of the battery device.

[0018] In some embodiments, the plurality of liquid outlets further include a third liquid outlet, which is connected to the first branch channel; on the same side of the diversion structure along the second direction, at least one second liquid outlet and the third liquid outlet are distributed along the first direction.

[0019] By adopting the above technical solution, the thermal management liquid in the first branch channel can flow through the third liquid outlet to the battery cell corresponding to the second liquid outlet. This helps increase the flow rate of the thermal management liquid to the battery cell corresponding to the second liquid outlet, thereby helping to improve the efficiency of heat exchange between the battery cell corresponding to the second liquid outlet and the thermal management liquid. In other words, the provision of the third liquid outlet can replenish the thermal management liquid in the first branch channel to the rear battery cells, thereby improving the heat exchange efficiency between the rear battery cells and the thermal management liquid, thereby helping to improve the temperature uniformity of the battery device.

[0020] In some embodiments, the diameter of the third liquid outlet hole is larger than the diameter of the second liquid outlet hole.

[0021] By making the aperture of the third liquid outlet hole larger than that of the second liquid outlet hole, the third liquid outlet hole has a larger aperture, which facilitates the replenishment of the thermal management liquid in the first sub-channel to the battery cell corresponding to the second liquid outlet hole, thereby improving the efficiency of heat exchange between the battery cell corresponding to the second liquid outlet hole and the thermal management liquid, thereby helping to further improve the temperature uniformity of the battery device.

[0022] In some embodiments, on the same side of the diversion structure along the second direction, all the second liquid outlet holes and the third liquid outlet holes are distributed along the first direction.

[0023] In this way, the problem of a small flow rate of the thermal management liquid at this location caused by the obstruction of the side wall of the box body away from the liquid inlet in the first direction can be improved, thereby helping to further increase the flow rate of the thermal management liquid on the rear battery cells, so as to improve the heat exchange efficiency between the rear battery cells and the thermal management liquid, thereby helping to improve the temperature uniformity of the battery device.

[0024] In some embodiments, the liquid inlet is provided at one end of the diversion structure along the first direction, and the branch channel is connected to the liquid inlet; On the same projection plane perpendicular to the first direction, the orthographic projection of the liquid inlet covers the orthographic projections of all liquid outlet holes on the corresponding branch channels.

[0025] Such an arrangement facilitates the thermal management liquid that enters the sub-channels through the liquid inlet holes and quickly flows to all the liquid outlet holes, thereby improving the efficiency of heat exchange between the thermal management liquid and the battery cells.

[0026] In some embodiments, two second separators are provided between two battery cells adjacent to each other along the first direction, and the two second separators are spaced apart along the third direction to form a flow channel; On the same projection plane perpendicular to the first direction, the orthographic projection of the liquid outlet and the orthographic projection of the flow channel are arranged opposite each other along the second direction.

[0027] By adopting the above technical solution, the thermal management liquid can flow through the liquid outlet along the second direction to the battery cell, which is conducive to the thermal management liquid flowing into the flow channel to effectively implement thermal management operations on the battery cell.

[0028] In some embodiments, at least one first liquid outlet is disposed opposite to the battery cell along the second direction, and at least one second liquid outlet is disposed opposite to the flow channel along the second direction.

[0029] In this way, the flow resistance on the battery cell corresponding to the second liquid outlet can be smaller than the flow resistance on the battery cell corresponding to the first liquid outlet, so that the flow rate flowing to the battery cell corresponding to the second liquid outlet can be greater than the flow rate flowing to the battery cell corresponding to the first liquid outlet. In other words, the flow rate flowing to the rear battery cells is greater than the flow rate flowing to the front battery cells, thereby improving the heat exchange efficiency between the rear battery cells and the thermal management liquid. This arrangement helps to further reduce the temperature difference of the battery device and improve the temperature uniformity of the battery device.

[0030] In some embodiments, battery cell assemblies are provided on both sides of the diversion structure along the second direction; Two channels are provided in the diversion structure, and the two channels are distributed along the second direction; The two side walls of the diversion structure that are opposite to each other along the second direction are both provided with liquid outlet holes; In the second direction, the liquid outlet holes on both sides of the diversion structure are connected to the two channels respectively.

[0031] By employing this technical solution, the thermal management liquid can flow into the two channels separately and, through the outlet holes in each channel, onto the battery cell assemblies on either side of the second direction, thereby separately thermally managing the battery cell assemblies on both sides of the diversion structure along the second direction. In other words, the battery cell assemblies on both sides of the diversion structure along the second direction can be thermally managed separately via the corresponding channels. By adjusting the number, size, and specific layout of the outlet holes in each channel, the flow rate of the thermal management liquid to each battery cell assembly can be individually controlled, thereby improving the temperature uniformity of the battery device.

[0032] In some embodiments, the inner wall of the box body is provided with a plurality of liquid outlets, and at least some of the liquid outlets are spaced apart along the first direction; In the first direction, the apertures of at least some of the liquid outlets among the plurality of liquid outlets spaced apart along the first direction gradually increase.

[0033] By adopting the above technical solution, in the first direction, the aperture of the liquid outlet near the rear battery cell is larger than the aperture of the liquid outlet near the front battery cell, which helps to make the flow rate of the thermal management liquid near the rear battery cell greater than the flow rate of the thermal management liquid near the front battery cell, thereby helping to further improve the efficiency of heat exchange between the rear battery cell and the battery cell, which helps to further reduce the temperature difference of the battery device and improve the temperature uniformity of the battery device.

[0034] In a second aspect, an embodiment of the present application provides an electrical device, including a battery device.

[0035] The electrical device provided in the embodiment of the present application, by adopting the battery device involved above, can improve the temperature uniformity of the battery device, improve the reliability of the battery device, and thus improve the reliability of the electrical device.

[0036] In a third aspect, an embodiment of the present application provides an energy storage device, including a battery device.

[0037] The energy storage device provided in the embodiment of the present application, by adopting the battery device involved above, can improve the temperature uniformity of the battery device, improve the reliability of the battery device, and thus improve the reliability of the energy storage device.

[0038] In a fourth aspect, an embodiment of the present application provides an energy storage system, including an energy storage device.

[0039] The energy storage system provided in the embodiment of the present application, by adopting the above-mentioned energy storage device, can improve the temperature uniformity of the battery device, improve the reliability of the battery device, and thus improve the reliability of the energy storage system.

[0040] In a fifth aspect, an embodiment of the present application provides a charging network, including a charging pile and an energy storage device or an energy storage system, wherein the energy storage device is used to provide electrical energy to the charging pile.

[0041] The charging network provided in the embodiments of the present application, by adopting the above-mentioned energy storage device or energy storage system, can improve the temperature uniformity of the battery device and the reliability of the battery device, thereby improving the reliability of the charging network.

[0042] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0044] Figure 1 A schematic diagram of a vehicle provided for some embodiments of the present application; Figure 2 An exploded view of a battery device provided in some embodiments of the present application; Figure 3 A partial three-dimensional structural diagram of a housing and a shunt structure of a battery device provided in some embodiments of the present application; Figure 4 A partial schematic diagram of a battery device provided in some embodiments of the present application; Figure 5 A three-dimensional structural diagram of a shunt structure of a battery device provided in some embodiments of the present application; Figure 6 for Figure 5 Front view of Figure 7 for Figure 6 Sectional view along AA; Figure 8 for Figure 7 Enlarged view of point B in the middle; Figure 9 A schematic diagram of two battery cells of a battery device provided in some embodiments of the present application; Figure 10 for Figure 6 Cross-sectional view along CC; Figure 11 for Figure 10 Enlarged view of point D in the middle.

[0045] Among them, the reference numerals in the figures are: 1000-vehicle; 100-battery device; 200-controller; 300-motor; 10-housing; 101-liquid outlet; 11-first part; 111-bottom wall; 12-second part; 20-battery cell assembly; 201-flow channel; 21-battery cell; 22-second partition; 30-diversion structure; 301-channel; 3011-sub-channel; 3011a-first sub-channel; 3011b-second sub-channel; 302-liquid inlet; 302a-first liquid inlet; 302b-second liquid inlet; 303-liquid outlet; 303a-first liquid outlet; 303b-second liquid outlet; 303c-third liquid outlet; 31-main body; 32-first partition; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0046] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0047] Unless otherwise specified, all implementations and optional implementations of the embodiments of the present application can be combined with each other to form a new technical solution.

[0048] Unless otherwise specified, all technical features and optional technical features of the embodiments of the present application can be combined with each other to form a new technical solution.

[0049] In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0051] In the description of the embodiments of the present application, "a plurality of" means more than two, and unless otherwise specifically defined, "more than two" includes two. Accordingly, "a plurality of groups" means more than two groups, including two groups.

[0052] In the description of the embodiments of this application, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," and the like should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0053] In the description of the embodiments of this application, unless otherwise expressly specified or limited, the technical terms "adjacent" and "adjacent" refer to proximity in position. For example, for components A1, A2, and B, if the distance between A1 and B is greater than the distance between A2 and B, then A2 is closer to B than A1, meaning A2 is adjacent to B. Alternatively, B is adjacent to A2, or in other words, A2 is adjacent to B. For another example, if there are multiple components C, namely C1, C2, ..., CN, and one of the components C, such as C2, is closer to component B than the other components C, then B is adjacent to C2, or in other words, C2 is adjacent to B.

[0054] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

[0055] Market developments indicate that battery applications are becoming increasingly widespread. They are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As battery applications continue to expand, market demand is also growing. Furthermore, as battery capacity increases, performance requirements are becoming increasingly stringent, leading to higher thermal management requirements.

[0056] The battery device may be a power battery or an energy storage battery.

[0057] In related art, a battery device may include a housing and multiple rows of battery cells disposed within the housing. The housing may also include a manifold plate, with multiple spaced-apart liquid outlets disposed on at least one side of the manifold plate facing the battery cells. A thermal management liquid may flow into the manifold plate and, through the multiple outlets on the manifold plate, flow to the multiple rows of battery cells, thereby providing thermal management for the battery cells.

[0058] However, the thermal management liquid first enters the manifold and then flows through the multiple outlet holes on the manifold to multiple rows of battery cells. This inevitably leads to poor temperature uniformity in the battery device. In other words, within the multiple rows of battery cells in the battery device, some battery cells may have higher temperatures while others may have lower temperatures, resulting in large temperature differences in the battery device. This affects the reliability of the battery device.

[0059] Specifically, in some cases, after the thermal management liquid enters the manifold, it will exchange heat with the battery cells through the manifold, so that the thermal management liquid is heated. In this way, in the flow direction of the thermal management liquid in the manifold, the temperature of the thermal management liquid in the manifold will gradually increase. After the thermal management liquid in the manifold flows to multiple rows of battery cells through multiple liquid outlets, in the flow direction of the thermal management liquid in the manifold, the temperature of the thermal management liquid flowing to the rear row of battery cells is higher than the temperature of the thermal management liquid flowing to the front row of battery cells, making the heat exchange efficiency between the rear row of battery cells and the thermal management liquid lower than the heat exchange efficiency between the front row of battery cells and the thermal management liquid, thereby making the temperature of the rear row of battery cells generally higher than the temperature of the front row of battery cells. In this way, the temperature uniformity of all battery cells in the battery device is poor.

[0060] Based on the above considerations, the embodiments of the present application provide a battery device, an electrical device, an energy storage device, an energy storage system, and a charging network. In the first direction, on the same side of the diversion structure along the second direction, the apertures of at least some of the multiple liquid outlets spaced apart along the first direction gradually increase, so that the flow rate of the thermal management liquid flowing out through the liquid outlets in the first direction can gradually increase. That is, in the first direction, the flow rate of the thermal management liquid flowing through the multiple liquid outlets to the multiple rows of battery cells gradually increases, thereby gradually increasing the efficiency of heat exchange between the thermal management liquid and the battery cells in the first direction. This arrangement can reduce the temperature difference between the multiple rows of battery cells and improve the temperature uniformity of the battery device.

[0061] The battery device involved in the embodiments of the present application can be a single physical module including one or more battery cells, which is used to provide voltage and capacity. Where there are multiple battery cells, the multiple battery cells are connected in series, in parallel, or in a hybrid connection through a busbar. A hybrid connection refers to the multiple battery cells being connected in both series and parallel.

[0062] In some embodiments, the battery device may be a battery module. When multiple battery cells are present, the multiple battery cells are arranged and secured to form a battery module. For example, the multiple battery cells may be secured to form a battery module using cable ties or the like. For example, the multiple battery cells may also be secured to form a battery module using end plates, side plates, or the like.

[0063] In some embodiments, the battery device may be a battery pack, which may include a housing and battery cells. For example, the battery cells may be directly housed in the housing. For example, multiple battery cells may be first formed into one or more battery modules and then housed in the housing.

[0064] A battery cell is the smallest unit used to store and output electrical energy. A battery cell can be either a secondary battery or a primary battery. A secondary battery is one that can be recharged after discharge to activate the active materials and continue to be used.

[0065] The battery cells may be cylindrical, flat, rectangular, or in other shapes. The battery cells may be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, or the like.

[0066] The battery device involved in the embodiments of the present application can be used in an energy storage device that uses the battery device as an energy storage element.

[0067] The energy storage device involved in the embodiments of the present application may be an energy storage container or an energy storage cabinet.

[0068] 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. They can store electrical energy as needed and deliver it when appropriate. For example, they can store energy during low-demand periods and provide it to users or devices during peak demand periods.

[0069] The energy storage device may include one or more battery clusters, and a battery cluster includes multiple battery devices.

[0070] In some embodiments, in a battery cluster, multiple battery devices may be connected in series via a busbar to increase the voltage of the energy storage device.

[0071] In some embodiments, when the energy storage device includes multiple battery clusters, the multiple battery clusters may be connected in parallel to increase the capacity of the energy storage device.

[0072] In some embodiments, the energy storage device may further include a cabinet in which the battery cluster is housed.

[0073] In some embodiments, the energy storage device may further include modules such as a thermal management module, a main control module, a master control module, a power distribution module, and a fire protection module.

[0074] In some embodiments, the thermal management module may include a liquid cooling unit that provides cooling liquid for regulating the temperature of the battery cells to each battery device through a pipeline.

[0075] In some embodiments, the master control module can serve as the battery management unit (BMU) of a battery cluster, monitoring and managing the battery cluster. The master control module can monitor information such as the battery cluster's current, voltage, power, or temperature. For example, the master control module can control the battery cluster's charge and discharge current and voltage. The master control module includes modules such as a slave battery management unit (SBMU) and a fusion switch.

[0076] In some embodiments, the master control module can serve as a battery management unit for the energy storage device, used to monitor and manage the energy storage device. The master control module can monitor information such as the current, voltage, power, state of charge, or temperature of the energy storage device. For example, the master control module can control the charge and discharge current, voltage, and other parameters of the energy storage device. As an example, the master control module includes modules such as an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH), and a fiber optic conversion module.

[0077] In some embodiments, the fire protection module may include a control panel, a detector, an alarm device, etc., which are used to detect, alarm, or extinguish fires in the energy storage device.

[0078] In some embodiments, the power distribution module can be used to distribute power to modules in the energy storage device that require power.

[0079] The energy storage system involved in the embodiments of the present application can be any power system that requires an energy storage device.

[0080] The energy storage system involved in the embodiments of the present application may include an energy storage device. The energy storage system may be connected to a power grid or microgrid; alternatively, the energy storage system may be coupled to power generation equipment; alternatively, the energy storage system may be connected to power-consuming equipment. The number of energy storage devices may be one or more.

[0081] The charging network involved in the embodiment of the present application may include a charging pile and an energy storage device, the charging pile is electrically connected to the energy storage device, and the energy storage device is used to provide electrical energy to the charging pile.

[0082] The charging pile and the battery device in the energy storage device can be electrically connected via a cable, and the battery device can provide its stored electrical energy to the charging pile.

[0083] The charging pile may have one or more connectors, which are used to connect to an electrical device (such as a vehicle) so as to replenish energy to the electrical device.

[0084] The energy storage device can be located inside the charging pile (for example, a charging and storage integrated machine) or outside the charging pile.

[0085] The battery device provided by the embodiments of the present application can also be used in a power consumption device using the battery device as a power supply.

[0086] The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, a vehicle, a ship, a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, an electric plane toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc. According to the power source, the vehicle can be a fuel car, a gas car, or a new energy car, and the new energy car can be a pure electric car, a hybrid car, or a range extended car, etc. According to the driving mode, the vehicle can be a front-drive car, a rear-drive car, or an all-wheel-drive car.

[0087] For ease of description, the embodiments of the present application take the power consumption device as a vehicle for example.

[0088] In some embodiments, please refer to Figure 1 , Figure 1 A schematic diagram of the vehicle 1000 provided by some embodiments of the present application is shown. The vehicle 1000 is internally provided with the battery device 100, which can be arranged at the bottom, the head or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

[0089] In some embodiments, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0090] In some embodiments, please refer to Figure 2 , Figure 2 An exploded view of the battery device 100 provided by some embodiments of the present application is shown. The battery device 100 can include a box 10 and a battery cell 21. The box 10 is a structure with an internal space, and the internal space of the box 10 is used to accommodate the battery cell 21.

[0091] The box 10 can adopt a variety of structures. In some embodiments, the box 10 can include a first part 11 and a second part 12, which cover each other and together define the interior space of the box 10. The interior space of the box 10 is a closed space. The closed space here means covered or closed, which can be sealed or unsealed. That is, the box 10 can be a sealed structure or an unsealed structure. Figure 2 The first part 11 and the second part 12 can both be hollow structures with an opening at one end, with the open side of the first part 11 covering the open side of the second part 12, so that the first part 11 and the second part 12 jointly define the interior space of the box body 10. Alternatively, the first part 11 can be a hollow structure with an opening at one end, and the second part 12 can be a plate-like structure, with the second part 12 covering the open side of the first part 11, so that the first part 11 and the second part 12 jointly define the interior space of the box body 10. The box body 10 composed of the first part 11 and the second part 12 can have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0092] In some embodiments, multiple battery cells 21 can be connected in series, in parallel, or in a hybrid to form a whole, and then the whole formed by the multiple battery cells 21 can be directly accommodated in the internal space of the casing 10. In other embodiments, multiple battery cells 21 can also be connected in series, in parallel, or in a hybrid, and then arranged and fixed to form a battery module, and the battery module can be accommodated in the internal space of the casing 10. In still other embodiments, multiple battery cells 21 can also be connected in series, in parallel, or in a hybrid to form multiple battery modules, and then the multiple battery modules can be connected in series, in parallel, or in a hybrid to form a whole, and then accommodated in the internal space of the casing 10.

[0093] In some embodiments, please combine Figure 1 and Figure 2 The housing 10 of the battery device 100 may serve as part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 may form at least a portion of the floor of the vehicle 1000, or a portion of the housing 10 may form at least a portion of a cross member or a longitudinal member of the vehicle 1000.

[0094] Please also refer to Figures 3 to 5 , and combined with other drawings. Among them, Figure 3 This is a partial three-dimensional structural diagram of the box 10 and the shunt structure 30 of the battery device 100 provided in some embodiments of the present application. Figure 4 A partial schematic diagram of a battery device 100 provided in some embodiments of the present application is shown. Figure 5 This is a three-dimensional structural diagram of the shunt structure 30 of the battery device 100 provided in some embodiments of the present application. Figure 5, at least a portion of the first separator 32 is indicated by a dotted line. The battery device 100 provided in an embodiment of the present application includes a housing 10, a battery cell assembly 20, and a shunt structure 30. At least a portion of the battery cell assembly 20 is disposed within the housing 10. The battery cell assembly 20 includes multiple rows of battery cells 21, and the multiple rows of battery cells 21 of the battery cell assembly 20 are arranged along a first direction X. Each row of battery cells 21 is arranged along a second direction Y, with the first direction X and the second direction Y being perpendicular. At least a portion of the shunt structure 30 is disposed within the housing 10, and the shunt structure 30 has a battery cell assembly 20 on at least one side along the second direction Y. The diverter structure 30 is provided with a channel 301 and a liquid inlet 302 connected to the channel 301. A plurality of liquid outlet holes 303 are provided on the sidewall of the diverter structure 30 along the second direction Y, facing the battery cell assembly 20. Each of the plurality of liquid outlet holes 303 is connected to the channel 301. The liquid inlet holes 302 and the liquid outlet holes 303 are distributed along a first direction X, which is the direction of liquid flow within the channel 301. Within the same side of the diverter structure 30 along the second direction Y, at least some of the liquid outlet holes 303 are spaced apart along the first direction X. Within the same side of the diverter structure 30 along the second direction Y, at least some of the plurality of liquid outlet holes 303 spaced apart along the first direction X have gradually increasing diameters.

[0095] The battery cell assembly 20 refers to an assembly structure composed of a plurality of battery cells 21 .

[0096] Each row of battery cells 21 may include at least one battery cell 21 . Each row of battery cells 21 may be arranged along the second direction Y. This means that when each row of battery cells 21 includes multiple battery cells 21 , the multiple battery cells 21 in each row are distributed along the second direction Y. The second direction Y is the distribution direction of each row of battery cells 21 and may be the direction of a double-headed arrow.

[0097] The flow dividing structure 30 is a structure for circulating the thermal management liquid and allowing the thermal management liquid to flow out separately. The thermal management liquid may be, but is not limited to, a coolant.

[0098] Channel 301 is provided within the diverter structure 30 and is a cavity or flow passage 201 within the diverter structure 30 for circulating the thermal management liquid. The liquid inlet 302 is an opening within the diverter structure 30 for allowing the thermal management liquid to enter the channel 301, while the liquid outlet 303 is an opening within the diverter structure 30 for allowing the thermal management liquid within the channel 301 to exit.

[0099] It can be understood that the battery cell assembly 20 and the diversion structure 30 are distributed along the second direction Y, and the liquid outlet 303 and the battery cell assembly 20 are arranged opposite to each other along the second direction Y.

[0100] It is understood that the battery device 100 may include at least one battery cell assembly 20. In some possible designs, such as Figure 4 As shown, the diverter structure 30 has battery cell assemblies 20 on both sides along the second direction Y. Liquid outlets 303 are provided on two opposing sidewalls of the diverter structure 30 along the second direction Y. In the second direction Y, the thermal management liquid in the channel 301 can flow through the liquid outlets 303 on each side to the battery cell assembly 20 on the corresponding side. Alternatively, in other possible designs, the diverter structure 30 has a battery cell assembly 20 on one side along the second direction Y, and liquid outlets 303 are provided on the sidewall of the diverter structure 30 facing the battery cell 21 along the second direction Y. The thermal management liquid in the channel 301 can flow through the liquid outlets 303 to the battery cell assembly 20.

[0101] It can be understood that the first direction X is the general flow direction of the thermal management liquid within the channel 301. The thermal management liquid can flow in a straight line or in a curved pattern within the channel 301 along the first direction X. Specifically, the first direction X is the distribution direction of the liquid inlet holes 302 and the liquid outlet holes 303. It is a unidirectional direction, that is, the general direction of the thermal management liquid flowing from the liquid inlet holes 302 to the liquid outlet holes 303. Furthermore, the first direction X is generally parallel to the distribution direction of the multiple rows of battery cells 21 in the battery cell assembly 20.

[0102] The plurality of liquid outlet holes 303 are spaced apart on the diversion structure 30 , and the liquid inlet hole 302 and the liquid outlet hole 303 are spaced apart on the diversion structure 30 .

[0103] The “at least some of the liquid outlet holes 303 ” in “on the same side of the diverter structure 30 along the second direction Y, at least some of the liquid outlet holes 303 are arranged at intervals along the first direction X” includes a plurality of liquid outlet holes 303 .

[0104] On the same side of the diverter structure 30 along the second direction Y, at least some of the multiple liquid outlet holes 303 are spaced apart along the first direction X, so that the thermal management liquid in the channel 301 can flow to the battery cell assembly 20 through the multiple liquid outlet holes 303. That is, the thermal management liquid in the channel 301 can flow to the battery cell assembly 20 at multiple locations along the first direction X through the diverter structure 30, and thus flow to multiple rows of battery cells 21 in the battery cell assembly 20 along the first direction X. In this way, the battery cells 21 in the multiple rows of the battery cell assembly 20 along the first direction X are all in full contact with the thermal management liquid and can exchange heat with each other.

[0105] On the same side of the diverter structure 30 along the second direction Y, in the first direction X, the apertures of at least some of the multiple liquid outlet holes 303 spaced apart along the first direction X gradually increase, which means that on the same side of the diverter structure 30 along the second direction Y, among the multiple liquid outlet holes 303 spaced apart along the first direction X, among any two liquid outlet holes 303, in the first direction X, the aperture of the liquid outlet hole 303 close to the rear row of battery cells 21 is larger than the aperture of the liquid outlet hole 303 close to the front row of battery cells 21.

[0106] The front row of battery cells 21 and the rear row of battery cells 21 are relative to each other, that is, the front row of battery cells 21 and the rear row of battery cells 21 are arranged in sequence along the first direction X.

[0107] Among them, some possible designs, such as Figure 5 As shown, in some possible designs, on the same side of the diverter structure 30 along the second direction Y, in the first direction X, the apertures of all the liquid outlet holes 303 spaced apart along the first direction X gradually increase. Alternatively, in other possible designs, on the same side of the diverter structure 30 along the second direction Y, in the first direction X, the apertures of some of the multiple liquid outlet holes 303 spaced apart along the first direction X gradually increase.

[0108] The diameter of the liquid outlet 303 refers to the area of ​​a cross section perpendicular to the second direction Y of the liquid outlet 303 .

[0109] In the battery device 100 provided in the embodiment of the present application, the apertures of at least some of the multiple outlet holes 303 spaced apart along the first direction X on the same side of the diverter structure 30 along the second direction Y gradually increase. This allows the flow rate of the thermal management liquid flowing through the outlet holes 303 in the first direction X to gradually increase. Specifically, the flow rate of the thermal management liquid flowing through the multiple outlet holes 303 to the multiple rows of battery cells 21 in the first direction X gradually increases, thereby gradually increasing the efficiency of heat exchange between the thermal management liquid and the battery cells 21 in the first direction X. Specifically, in the first direction X, the flow rate of the thermal management liquid flowing to the rear row of battery cells 21 can be greater than the flow rate of the thermal management liquid flowing to the front row of battery cells 21, resulting in a greater efficiency of heat exchange between the thermal management liquid and the rear row of battery cells 21 than between the thermal management liquid and the front row of battery cells 21. This arrangement can reduce temperature differences across the multiple rows of battery cells 21, improve the temperature uniformity of the battery device 100, and thus enhance the reliability of the battery device 100.

[0110] In some embodiments, see Figure 3The housing 10 includes a bottom wall 111 , and the battery cell assembly 20 is supported on the bottom wall 111 along a third direction Z. The third direction Z is perpendicular to the first direction X, and the third direction Z is perpendicular to the second direction Y.

[0111] Specifically, the bottom wall 111 and the battery cell assemblies 20 are distributed along a third direction Z. The third direction Z is the distribution direction of the bottom wall 111 and the battery cells 21 and may be a double-arrow direction.

[0112] As an example, the first direction X may be a length direction of the battery device 100 , the second direction Y may be a width direction of the battery device 100 , and the third direction Z may be a height direction of the battery device 100 .

[0113] In some embodiments, please refer to Figure 3 and Figure 5 On the same side of the diversion structure 30 along the second direction Y, in the first direction X, the distance between at least some of the plurality of liquid outlet holes 303 spaced apart along the first direction X and the bottom wall 111 gradually decreases.

[0114] It can be understood that, on the same side of the diversion structure 30 along the second direction Y, among at least some of the multiple liquid outlet holes 303 arranged at intervals along the first direction X, among any two liquid outlet holes 303, in the first direction X, the distance between the liquid outlet hole 303 close to the rear row of battery cells 21 and the bottom wall 111 is smaller than the distance between the liquid outlet hole 303 close to the front row of battery cells 21 and the bottom wall 111.

[0115] In some possible designs, on the same side of the diverter structure 30 along the second direction Y, in the first direction X, the distance between some of the plurality of liquid outlet holes 303 spaced apart along the first direction X and the bottom wall 111 gradually decreases. Alternatively, in other possible designs, on the same side of the diverter structure 30 along the second direction Y, in the first direction X, the distance between all of the liquid outlet holes 303 spaced apart along the first direction X and the bottom wall 111 gradually decreases.

[0116] The distance between the liquid outlet 303 and the bottom wall 111 refers to the distance between the liquid outlet 303 and the bottom wall 111 in the third direction Z.

[0117] By adopting the above-described technical solution, when the thermal management liquid enters the channel 301 through the liquid inlet 302, it is facilitated to flow rapidly to the liquid outlet 303 located near the rear row of battery cells 21 along the first direction X. This can alleviate the problem in which the thermal management liquid in the channel 301 first flows to the liquid outlet 303 located near the front row of battery cells 21 along the first direction X, causing eddy currents around the liquid outlet 303 and making it difficult for the thermal management liquid to flow to the liquid outlet 303 located near the rear row of battery cells 21 along the first direction X. This arrangement facilitates achieving a gradually increasing flow rate of the thermal management liquid through the multiple liquid outlets 303 to the multiple rows of battery cells 21 in the first direction X, thereby gradually increasing the efficiency of heat exchange between the thermal management liquid and the battery cells 21 in the first direction X, thereby further improving the temperature uniformity of the battery device 100.

[0118] In some embodiments, please refer to Figures 3 to 8 , and combined with other drawings. Among them, Figure 6 for Figure 5 Front view of Figure 7 for Figure 6 Cross-section view along AA, Figure 8 for Figure 7 Enlarged view of point B in the middle. Figure 6 In the figure, at least a portion of the first partition 32 is indicated by a dotted line, which demarcates the first sub-channel 3011a from the second sub-channel 3011b. A first partition 32 is provided within the channel 301, dividing the channel 301 into a plurality of sub-channels 3011. The plurality of sub-channels 3011 of the channel 301 are distributed along a third direction Z. The third direction Z is perpendicular to the first direction X, which is also perpendicular to the second direction Y. Each sub-channel 3011 is connected to a liquid outlet 303. On the same side of the diversion structure 30 along the second direction Y, at least some of the liquid outlets 303 on the plurality of sub-channels 3011 are distributed along the first direction X.

[0119] The first partition 32 is a component used to divide the channel 301 into a plurality of sub-channels 3011 , where the sub-channels 3011 are sub-cavities in the channel 301 .

[0120] The third direction Z is the distribution direction of the multiple sub-channels 3011 in the channel 301, which is the direction of the double arrow.

[0121] It is understood that each sub-channel 3011 corresponds to at least one liquid outlet 303, and each sub-channel 3011 is connected to the corresponding liquid outlet 303. In other words, a liquid outlet 303 is provided on the sidewall of each sub-channel 3011. In this way, the thermal management liquid in each sub-channel 3011 can flow to the battery cell assembly 20 through the corresponding liquid outlet 303.

[0122] It can be understood that each sub-channel 3011 corresponds to a liquid inlet 302, and each sub-channel 3011 is connected to the corresponding liquid inlet 302. In other words, a liquid inlet 302 is provided on the sidewall of each sub-channel 3011. In this way, the thermal management liquid can flow through the liquid inlet 302 into the corresponding sub-channel 3011, and then flow through the corresponding liquid outlet 303 to the battery cell assembly 20.

[0123] The phrase "at least some of the liquid outlet holes 303 on the plurality of sub-channels 3011 on the same side of the flow diverter structure 30 along the second direction Y, at least some of the liquid outlet holes 303 are distributed along the first direction X" includes at least one liquid outlet hole 303. The phrase "at least some of the liquid outlet holes 303 on the plurality of sub-channels 3011 are distributed along the first direction X" means that, for any two sub-channels 3011, at least some of the liquid outlet holes 303 on one sub-channel 3011 and at least some of the liquid outlet holes 303 on the other sub-channel 3011 are distributed along the first direction X.

[0124] It can be understood that the channel 301 is divided into multiple sections, namely, multiple sub-channels 3011. Furthermore, on the same side of the diversion structure 30 along the second direction Y, the multiple liquid outlets 303 are divided into multiple sections, and the multiple partial liquid outlets 303 and the multiple sub-channels 3011 are arranged in a one-to-one correspondence and connected. Based on this, the multiple rows of battery cells 21 in the battery cell assembly 20 can be divided into multiple sections along the first direction X, and the multiple partial battery cells 21 are arranged in a one-to-one correspondence with the multiple partial liquid outlets 303. In this way, the thermal management liquid can flow into the multiple sub-channels 3011 respectively and flow through the corresponding liquid outlets 303 to the corresponding sections of battery cells 21.

[0125] This arrangement allows the multiple rows of battery cells 21 in the battery cell assembly 20 to be divided into multiple sections along the first direction X, and each section of battery cells 21 can be thermally managed by the thermal management liquid within the corresponding sub-channel 3011. In other words, the multiple sections of battery cells 21 in the battery cell assembly 20 can be thermally managed separately. Thus, by adjusting the number, size, and specific layout of the liquid outlets 303 in each sub-channel 3011, the flow rate of the thermal management liquid to each section of battery cells 21 can be independently controlled, thereby improving the temperature uniformity of the battery device 100.

[0126] By individually adjusting the flow rate of the thermal management liquid on each portion of the battery cells 21 , the thermal management liquid on each portion of the battery cells 21 can overcome the flow resistance on the portion of the battery cells 21 .

[0127] Specifically, if Figures 3 to 8As shown in the figure, and in conjunction with other figures, the plurality of sub-channels 3011 include a first sub-channel 3011a and a second sub-channel 3011b distributed along the third direction Z. On the same side of the diverter structure 30 along the second direction Y, the plurality of liquid outlets 303 include a first liquid outlet 303a and a second liquid outlet 303b. The first liquid outlet 303a is connected to the first sub-channel 3011a, and the second liquid outlet 303b is connected to the second sub-channel 3011b. The first liquid outlet 303a and the second liquid outlet 303b are distributed along the first direction X.

[0128] It is understood that any two of the multiple sub-channels 3011 can be the first sub-channel 3011a and the second sub-channel 3011b, respectively. On the same side of the diversion structure 30 along the second direction Y, at least two of the multiple liquid outlets 303 can be the first liquid outlet 303a and the second liquid outlet 303b, respectively. The first liquid outlet 303a is a liquid outlet 303 on the sidewall of the first sub-channel 3011a, and the first liquid outlet 303a is connected to the first sub-channel 3011a. The second liquid outlet 303b is a liquid outlet 303 on the sidewall of the second sub-channel 3011b, and the second sub-channel 3011b is connected to the second liquid outlet 303b.

[0129] In the same side of the diversion structure 30 along the second direction Y, there is at least one first liquid outlet 303a . In the same side of the diversion structure 30 along the second direction Y, there is at least one second liquid outlet 303b .

[0130] As an example, Figures 3 to 8As shown, the channel 301 is divided into two sub-channels 3011, which are respectively a first sub-channel 3011a and a second sub-channel 3011b. On the same side of the diversion structure 30 along the second direction Y, at least two liquid outlets 303 can be respectively a first liquid outlet 303a and a second liquid outlet 303b. The first liquid outlet 303a is a liquid outlet 303 on the sidewall of the first sub-channel 3011a, and the first liquid outlet 303a is connected to the first sub-channel 3011a. The second liquid outlet 303b is a liquid outlet 303 on the sidewall of the second sub-channel 3011b, and the second sub-channel 3011b is connected to the second liquid outlet 303b. The multiple rows of battery cells 21 in the battery cell assembly 20 are divided into two parts along the first direction X, namely the front row of battery cells 21 and the rear row of battery cells 21. The first liquid outlet 303a and the front row of battery cells 21 are arranged correspondingly, specifically opposite each other along the second direction Y. The second liquid outlet holes 303b are disposed correspondingly to the rear-row battery cells 21, specifically, relative to each other along the second direction Y. Based on this, the thermal management liquid can flow into the first sub-channel 3011a and the second sub-channel 3011b, respectively. The thermal management liquid in the first sub-channel 3011a can flow to the front-row battery cells 21 through the first liquid outlet holes 303a, and the thermal management liquid in the second sub-channel 3011b can flow to the rear-row battery cells 21 through the second liquid outlet holes 303b. In this way, by adjusting the number, size, and specific layout of the first and second liquid outlet holes 303a, the flow rates of the thermal management liquid in the front and rear-row battery cells 21 can be individually adjusted, thereby improving the temperature uniformity of the battery device 100.

[0131] It should be explained that the battery cells 21 corresponding to the first liquid outlet 303a mentioned below refer to the battery cells 21 arranged opposite the first liquid outlet 303a along the second direction Y. The battery cells 21 corresponding to the second liquid outlet 303b are the battery cells 21 arranged opposite the second liquid outlet 303b along the second direction Y.

[0132] In some embodiments, please refer to Figures 3 to 8 , and in combination with other drawings, the first liquid outlet hole 303a and the second liquid outlet hole 303b are distributed along the first direction X, and the aperture of the second liquid outlet hole 303b is larger than that of the first liquid outlet hole 303a.

[0133] It can be understood that the cross-sectional area of ​​the second liquid outlet hole 303 b perpendicular to the second direction Y is greater than the cross-sectional area of ​​the first liquid outlet hole 303 a perpendicular to the second direction Y.

[0134] This arrangement allows the diameters of at least some of the multiple outlet holes 303 spaced apart along the first direction X on the same side of the flow diversion structure 30 along the second direction Y to gradually increase in the first direction X, thereby gradually increasing the flow rate of the thermal management liquid flowing through the outlet holes 303 in the first direction X. Thus, in the first direction X, the flow rate of the thermal management liquid flowing through the multiple outlet holes 303 to the multiple rows of battery cells 21 gradually increases, thereby gradually increasing the efficiency of heat exchange between the thermal management liquid and the battery cells 21 in the first direction X.

[0135] Specifically, the flow rate of the thermal management liquid in the second sub-channel 3011b flowing to the battery cells 21 through the second liquid outlet 303b can be greater than the flow rate of the thermal management liquid in the first sub-channel 3011a flowing to the battery cells 21 through the first liquid outlet 303a. This allows the thermal management liquid in the second sub-channel 3011b to flow out and exchange heat with the battery cells 21 more efficiently than the thermal management liquid in the first sub-channel 3011a. Thus, in the first direction X, the heat exchange efficiency between the rear-row battery cells 21 and the thermal management liquid is higher than that between the front-row battery cells 21 and the thermal management liquid. This helps reduce the temperature difference between the front-row battery cells 21 and the rear-row battery cells 21, specifically, the temperature difference between the multiple sections of battery cells 21 corresponding to the multiple sub-channels 3011, thereby improving the temperature uniformity of the multiple sections of battery cells 21 corresponding to the multiple sub-channels 3011, and thus improving the temperature uniformity of the battery device 100.

[0136] It should be noted that the liquid inlet hole 302 on the sidewall of the first sub-channel 3011a is the first liquid inlet hole 302a. The first liquid inlet hole 302a is connected to the first sub-channel 3011a, and the thermal management liquid can enter the first sub-channel 3011a through the first liquid inlet hole 302a. The liquid inlet hole 302 on the sidewall of the second sub-channel 3011b is the second liquid inlet hole 302b. The second liquid inlet hole 302b is connected to the second sub-channel 3011b, and the thermal management liquid can enter the second sub-channel 3011b through the second liquid inlet hole 302b.

[0137] In some embodiments, please refer to Figures 3 to 8 , and in conjunction with other figures. On the same side of the diverter structure 30 along the second direction Y, the branch channel 3011 communicates with the plurality of liquid outlet holes 303. On the same side of the diverter structure 30 along the second direction Y, at least some of the plurality of liquid outlet holes 303 communicating with the branch channel 3011 are spaced apart along the first direction X.

[0138] It can be understood that on the same side of the diversion structure 30 along the second direction Y, a plurality of spaced-apart liquid outlets 303 are provided on the sidewall of the sub-channel 3011 , and the plurality of liquid outlets 303 are all connected to the sub-channel 3011 .

[0139] The phrase "at least some of the multiple liquid outlet holes 303 communicating with the sub-channel 3011 on the same side of the flow diverter structure 30 along the second direction Y, at least some of the liquid outlet holes 303 are arranged at intervals along the first direction X" includes multiple liquid outlet holes 303. It can be understood that at least some of the liquid outlet holes 303 on the sub-channel 3011 on the same side of the flow diverter structure 30 along the second direction Y are arranged at intervals along the first direction X.

[0140] Among them, some possible designs, such as Figures 3 to 8 As shown, on the same side of the flow diverter structure 30 along the second direction Y, all the liquid outlet holes 303 on the branch channel 3011 are spaced apart along the first direction X. Alternatively, on the same side of the flow diverter structure 30 along the second direction Y, a portion of the liquid outlet holes 303 on the branch channel 3011 are spaced apart along the first direction X.

[0141] Among some possible designs, such as Figures 3 to 8 As shown, on the same side of the diversion structure 30 along the second direction Y, there are multiple first liquid outlet holes 303a, and at least some of the first liquid outlet holes 303a are spaced apart along the first direction X. In this way, the thermal management liquid in the first branch channel 3011a can flow to the front row of battery cells 21 through the multiple first liquid outlet holes 303a, thereby flowing to multiple portions of the front row of battery cells 21 along the first direction X.

[0142] Among some possible designs, such as Figures 3 to 8 As shown, on the same side of the diversion structure 30 along the second direction Y, there are multiple second liquid outlet holes 303b, and at least some of the second liquid outlet holes 303b are spaced apart along the first direction X. In this way, the thermal management liquid in the second branch channel 3011b can flow to the front row of battery cells 21 through the multiple second liquid outlet holes 303b, thereby flowing to multiple portions of the front row of battery cells 21 along the first direction X.

[0143] In some embodiments, please refer to Figures 3 to 8 In conjunction with other drawings, on the same side of the diversion structure 30 along the second direction Y, among the multiple liquid outlet holes 303 communicating with the branch channel 3011, in the first direction X, the apertures of at least some of the multiple liquid outlet holes 303 spaced apart along the first direction X gradually increase.

[0144] The “at least some of the liquid outlet holes 303 ” in “in the first direction X, the apertures of at least some of the multiple liquid outlet holes 303 spaced apart along the first direction X gradually increase” includes multiple liquid outlet holes 303 .

[0145] It can be understood that on the same side of the diversion structure 30 along the second direction Y, among at least some of the multiple liquid outlet holes 303 on the branch channel 3011 that are spaced apart along the first direction X, among any two liquid outlet holes 303, in the first direction X, the aperture of the liquid outlet hole 303 close to the rear battery cell 21 is larger than the aperture of the liquid outlet hole 303 close to the front battery cell 21.

[0146] Among them, some possible designs, such as Figure 5 As shown, on the same side of the flow diverter structure 30 along the second direction Y, among the multiple liquid outlet holes 303 communicating with the sub-channel 3011, in the first direction X, the apertures of all the liquid outlet holes 303 spaced apart along the first direction X gradually increase. Alternatively, in other possible designs, on the same side of the flow diverter structure 30 along the second direction Y, among the multiple liquid outlet holes 303 communicating with the sub-channel 3011, in the first direction X, the apertures of some of the multiple liquid outlet holes 303 spaced apart along the first direction X gradually increase.

[0147] Among some possible designs, such as Figures 3 to 8 As shown, on the same side of the diversion structure 30 along the second direction Y, in the first direction X, the apertures of at least some of the plurality of first liquid outlet holes 303a spaced apart along the first direction X gradually increase.

[0148] Among some possible designs, such as Figures 3 to 8 As shown, on the same side of the diversion structure 30 along the second direction Y, in the first direction X, the apertures of at least some of the plurality of second liquid outlet holes 303b spaced apart along the first direction X gradually increase.

[0149] By adopting the above technical solution, the flow rate of the thermal management liquid in each sub-channel 3011 flowing out through the liquid outlet 303 in the first direction X can be gradually increased. That is, in the first direction X, the flow rate of the thermal management liquid in each sub-channel 3011 flowing through the multiple liquid outlets 303 to the battery cells 21 gradually increases. In this way, in the multiple battery cells 21 divided along the first direction X of the battery cell assembly 20, the efficiency of heat exchange between each battery cell 21 and the thermal management liquid gradually increases in the first direction X, thereby helping to reduce the temperature difference between each battery cell 21, improve the temperature uniformity of each battery cell 21, and thus improve the temperature uniformity of the battery device 100.

[0150] In some embodiments, please refer to Figures 3 to 8 In conjunction with other drawings, on the same side of the diversion structure 30 along the second direction Y, among the multiple liquid outlet holes 303 communicating with the branch channel 3011, in the first direction X, the distance between at least some of the multiple liquid outlet holes 303 spaced apart along the first direction X and the bottom wall 111 gradually decreases.

[0151] The “at least some of the liquid outlet holes 303 ” in “in the first direction X, the distance between at least some of the multiple liquid outlet holes 303 spaced apart along the first direction X and the bottom wall 111 gradually decreases” includes multiple liquid outlet holes 303 .

[0152] It can be understood that, on the same side of the diversion structure 30 along the second direction Y, among at least some of the multiple liquid outlets 303 on the branch channel 3011 that are spaced apart along the first direction X, among any two liquid outlets 303, in the first direction X, the distance between the liquid outlet 303 close to the rear row of battery cells 21 and the bottom wall 111 is smaller than the distance between the liquid outlet 303 close to the front row of battery cells 21 and the bottom wall 111.

[0153] In some possible designs, among the multiple liquid outlet holes 303 communicating with the sub-channel 3011 on the same side of the diverter structure 30 along the second direction Y, the distance between all of the liquid outlet holes 303 spaced apart along the first direction X and the bottom wall 111 gradually decreases in the first direction X. Alternatively, in other possible designs, among the multiple liquid outlet holes 303 communicating with the sub-channel 3011 on the same side of the diverter structure 30 along the second direction Y, the distance between a portion of the multiple liquid outlet holes 303 spaced apart along the first direction X and the bottom wall 111 gradually decreases in the first direction X.

[0154] Among some possible designs, such as Figures 3 to 8 As shown, on the same side of the diversion structure 30 along the second direction Y, in the first direction X, the distance between at least some of the plurality of first liquid outlet holes 303a spaced apart along the first direction X and the bottom wall 111 gradually decreases.

[0155] Among some possible designs, such as Figures 3 to 8 As shown, on the same side of the diversion structure 30 along the second direction Y, in the first direction X, the distance between at least some of the plurality of second liquid outlet holes 303b spaced apart along the first direction X and the bottom wall 111 gradually decreases.

[0156] By adopting the above technical solution, when the thermal management liquid enters each sub-channel 3011 through the liquid inlet 302, the thermal management liquid is facilitated to flow quickly to the liquid outlet 303 of the sub-channel 3011 along the first direction X, close to the rear row of battery cells 21. This can alleviate the problem in which the thermal management liquid in the sub-channel 3011 first flows to the liquid outlet 303 along the first direction X, close to the front row of battery cells 21, causing eddy currents around the liquid outlet 303 and making it difficult for the thermal management liquid to flow to the liquid outlet 303 of the sub-channel 3011 along the first direction X, close to the rear row of battery cells 21. Such an arrangement facilitates the effect of gradually increasing the flow rate of the thermal management liquid in each sub-channel 3011 flowing to multiple rows of battery cells 21 through multiple liquid outlets 303 in the first direction X, thereby facilitating the effect of gradually increasing the efficiency of heat exchange between each part of the battery cells 21 and the thermal management liquid in the multiple parts of the battery cells 21 divided along the first direction X of the battery cell assembly 20, thereby further reducing the temperature of each part of the battery cells 21, improving the temperature uniformity of each part of the battery cells 21, and improving the temperature uniformity of the battery device 100.

[0157] In some embodiments, please refer to Figures 3 to 8 The housing 10 includes a bottom wall 111 , and the battery cell assembly 20 is supported on the bottom wall 111 along the third direction Z. In the third direction Z, the first sub-channel 3011a is located on a side of the second sub-channel 3011b away from the bottom wall 111 .

[0158] It can be understood that in the third direction Z, the second sub-channel 3011b is closer to the bottom wall 111 than the first sub-channel 3011a. Thus, in the third direction Z, the second liquid outlet 303b is closer to the bottom wall 111 than the first liquid outlet 303a.

[0159] By adopting the above technical solution, the thermal management liquid, after entering the second sub-channel 3011b through the second liquid inlet 302b, can quickly flow within the second sub-channel 3011b to the second liquid outlet 303b. This can alleviate the problem of the thermal management liquid entering the first sub-channel 3011a through the first liquid inlet 302a and then flowing to the first liquid outlet 303a, causing eddy currents around the first liquid outlet 303a. This can cause the thermal management liquid in the housing 10 to flow through the second liquid outlet 303b to the second sub-channel 201, making it difficult for the thermal management liquid to flow through the second liquid outlet 303b to the rear row of battery cells 21. Such a configuration allows the thermal management liquid to quickly enter the first branch channel 201 and the second branch channel 201, and quickly flow through the first liquid outlet hole 303a and the second liquid outlet hole 303b to the battery cell assembly 20, thereby facilitating the gradual increase in the efficiency of heat exchange between the thermal management liquid and the battery cell 21 in the first direction X, thereby further improving the temperature uniformity of the battery device 100.

[0160] In other optional embodiments, in the third direction Z, the first sub-channel 3011a may also be located on a side of the second sub-channel 3011b close to the bottom wall 111.

[0161] In some embodiments, please refer to Figure 5 and Figure 6 , and in conjunction with other figures. The plurality of liquid outlets 303 also includes a third liquid outlet 303c, which is connected to the first branch channel 3011a. On the same side of the diversion structure 30 along the second direction Y, at least one second liquid outlet 303b and a third liquid outlet 303c are distributed along the first direction X.

[0162] It can be understood that at least one liquid outlet hole 303 is the third liquid outlet hole 303c.

[0163] By adopting the above technical solution, the thermal management liquid in the first branch channel 201 can flow through the third liquid outlet 303c to the battery cells 21 corresponding to the second liquid outlet 303b. This helps increase the flow rate of the thermal management liquid to the battery cells 21 corresponding to the second liquid outlet 303b, thereby helping to improve the efficiency of heat exchange between the battery cells 21 corresponding to the second liquid outlet 303b and the thermal management liquid. In other words, the provision of the third liquid outlet 303c can replenish the thermal management liquid in the first branch channel 3011a to the rear battery cells 21, thereby improving the heat exchange efficiency between the rear battery cells 21 and the thermal management liquid, thereby helping to improve the temperature uniformity of the battery device 100.

[0164] In some embodiments, please refer to Figure 5 and Figure 6, and in combination with other drawings, the aperture of the third liquid outlet 303c is larger than the aperture of the second liquid outlet 303b.

[0165] The aperture of the third liquid outlet hole 303 c is the area of ​​a cross section perpendicular to the second direction Y of the third liquid outlet hole 303 c .

[0166] By making the diameter of the third liquid outlet hole 303c larger than that of the second liquid outlet hole 303b, the third liquid outlet hole 303c has a larger diameter. This facilitates the replenishment of the thermal management liquid in the first sub-channel 3011a to the battery cell 21 corresponding to the second liquid outlet hole 303b, thereby improving the efficiency of heat exchange between the battery cell 21 corresponding to the second liquid outlet hole 303b and the thermal management liquid, thereby helping to further improve the temperature uniformity of the battery device 100.

[0167] In some embodiments, please refer to Figure 5 and Figure 6 In combination with other drawings, on the same side of the diversion structure 30 along the second direction Y, all the second liquid outlet holes 303b and the third liquid outlet holes 303c are distributed along the first direction X.

[0168] It can be understood that the third liquid outlet 303 c is close to the side wall of the box body 10 along the first direction X away from the liquid inlet 302 .

[0169] In this way, the problem of a small flow rate of the thermal management liquid at the location caused by the obstruction of the side wall of the housing 10 away from the liquid inlet hole 302 along the first direction X can be improved, thereby helping to further increase the flow rate of the thermal management liquid on the rear battery cells 21, thereby improving the heat exchange efficiency between the rear battery cells 21 and the thermal management liquid, thereby helping to improve the temperature uniformity of the battery device 100.

[0170] In some embodiments, see Figure 5 The liquid inlet 302 is provided at one end of the diversion structure 30 along the first direction X, and the branch channel 3011 is connected to the liquid inlet 302 .

[0171] The liquid inlet 302 is provided at one end of the diversion structure 30 along the first direction X, so that the thermal management liquid entering the diversion channel 3011 from the liquid inlet 302 can flow to the liquid outlet 303 .

[0172] In some embodiments, on the same projection plane perpendicular to the first direction X, the orthographic projection of the liquid inlet 302 covers the orthographic projections of all the liquid outlet holes 303 on the corresponding branch channels 3011 .

[0173] In some possible designs, on the same projection plane perpendicular to the first direction X, the orthographic projection of the first liquid inlet 302 a covers the orthographic projections of all the first liquid outlet holes 303 a .

[0174] In some possible designs, on the same projection plane perpendicular to the first direction X, the orthographic projection of the second liquid inlet 302 b covers the orthographic projections of all the second liquid outlet holes 303 b .

[0175] This arrangement facilitates the thermal management liquid that enters the branch channel 3011 through the liquid inlet 302 to quickly flow to all the liquid outlet holes 303 , thereby improving the efficiency of heat exchange between the thermal management liquid and the battery cell 21 .

[0176] In some embodiments, please refer to Figure 4 and Figure 9 , and combined with other drawings. Among them, Figure 9 Schematic diagram of two battery cells 21 of a battery device 100 according to some embodiments of the present application. Two second separators 22 are disposed between two adjacent battery cells 21 along a first direction X. The two second separators 22 are spaced apart along a third direction Z to form a flow channel 201. On the same projection plane perpendicular to the first direction X, the orthographic projection of the liquid outlet 303 and the orthographic projection of the flow channel 201 are arranged opposite each other along the second direction Y.

[0177] The two second separators 22 and the two battery cells 21 surround and form a flow channel 201 , and the flow channel 201 is arranged to penetrate along the second direction Y.

[0178] By adopting the above technical solution, the thermal management liquid can flow along the second direction Y to the battery cell 21 through the liquid outlet 303 , which is conducive to the thermal management liquid flowing into the flow channel 201 to effectively implement thermal management operations on the battery cell 21 .

[0179] Furthermore, the flow channel 201 is formed by two second separators 22 spaced apart along the third direction Z, so that the thermal management liquid flowing into the flow channel 201 can effectively perform thermal management on the high-temperature areas of the battery cells 21 , thereby helping to improve the reliability of the battery device 100 .

[0180] In some possible designs, the second separator 22 may be a buffer structure, such as a rubber pad, a silicone pad, etc.

[0181] Such a configuration enables the second separator 22 to provide resistance to the expansion of the battery cell 21 .

[0182] In some embodiments, at least one first liquid outlet 303 a is disposed opposite to the battery cell 21 along the second direction Y, and at least one second liquid outlet 303 b is disposed opposite to the flow channel 201 along the second direction Y.

[0183] By adopting the above technical solution, the thermal management liquid, after flowing out through the at least one first liquid outlet 303a, can first flow to the surface of the battery cell 21 along the second direction Y, and then flow along the surface of the battery cell 21 into the flow channel 201. After flowing out through the at least one second liquid outlet 303b, the thermal management liquid can flow directly into the flow channel 201.

[0184] In this way, the flow resistance on the battery cells 21 corresponding to the second liquid outlet 303b can be smaller than the flow resistance on the battery cells 21 corresponding to the first liquid outlet 303a. As a result, the flow rate flowing to the battery cells 21 corresponding to the second liquid outlet 303b can be greater than the flow rate flowing to the battery cells 21 corresponding to the first liquid outlet 303a. In other words, the flow rate flowing to the rear-row battery cells 21 is greater than the flow rate flowing to the front-row battery cells 21, thereby improving the heat exchange efficiency between the rear-row battery cells 21 and the thermal management liquid. This arrangement helps to further reduce the temperature difference in the battery device 100 and improve the temperature uniformity of the battery device 100.

[0185] In some embodiments, please refer to Figures 3 to 8 、 Figure 10 and Figure 11 , and combined with other drawings. Among them, Figure 10 for Figure 6 Cross-sectional view along CC, Figure 11 for Figure 10 Enlarged view of point D in the middle. Battery cell assemblies 20 are located on both sides of the diverter structure 30 along the second direction Y. Two channels 301 are defined within the diverter structure 30, distributed along the second direction Y. Liquid outlets 303 are located on two opposing sidewalls of the diverter structure 30 along the second direction Y. In the second direction Y, the liquid outlets 303 on both sides of the diverter structure 30 are connected to the two channels 301, respectively.

[0186] It can be understood that the diversion structure 30 may include a main body 31 and the above-mentioned first partition 32, and the first partition 32 is arranged in the main body 31 to divide the internal space of the diversion structure 30 into two channels 301 distributed along the second direction Y, and divide each channel 301 into multiple diversion channels 201 distributed along the third direction Z.

[0187] A liquid inlet 302 is provided on the side wall of each channel 301 .

[0188] By adopting the above technical solution, the thermal management liquid can flow into the two channels 301 separately and flow through the liquid outlet holes 303 in each channel 301 to the battery cell assemblies 20 on each side along the second direction Y, thereby separately achieving thermal management of the battery cell assemblies 20 on both sides of the diverter structure 30 along the second direction Y. In other words, the battery cell assemblies 20 on both sides of the diverter structure 30 along the second direction Y can be separately thermally managed through the corresponding channels 301. In this way, by adjusting the number, size, and specific layout of the liquid outlet holes 303 in each channel 301, the flow rate of the thermal management liquid to each battery cell assembly 20 can be independently controlled, thereby improving the temperature uniformity of the battery device 100.

[0189] In some embodiments, see Figure 3 , and in conjunction with other drawings. The inner wall of the box body 10 is provided with a plurality of liquid outlets 101, at least some of which are spaced apart along the first direction X. In the first direction X, the apertures of at least some of the plurality of liquid outlets 101 spaced apart along the first direction X gradually increase.

[0190] The liquid outlet 101 refers to an opening of the housing 10 for allowing the thermal management liquid in the housing 10 to flow out of the housing 10 .

[0191] The “at least part of the liquid outlet holes 303 ” in “at least part of the liquid outlets 101 are arranged at intervals along the first direction X” includes a plurality of liquid outlet holes 303 .

[0192] In some possible designs, all the liquid outlets 101 are arranged at intervals along the first direction X. Alternatively, in other possible designs, a portion of the liquid outlets 101 are arranged at intervals along the first direction X.

[0193] By arranging at least some of the liquid outlets 101 at intervals along the first direction X, the thermal management liquid at various locations of the battery cell assembly 20 along the first direction X can be discharged through the corresponding liquid outlets 101, which helps to increase the flow rate of the thermal management liquid at various locations of the battery cell assembly 20 along the first direction X, thereby improving the thermal management efficiency of the battery cell assembly 20.

[0194] In the first direction X, the apertures of at least some of the multiple liquid outlets 101 spaced apart along the first direction X gradually increase, which means that among at least some of the multiple liquid outlets 101 spaced apart along the first direction X, among any two liquid outlets 101, in the first direction X, the aperture of the liquid outlet 101 close to the rear row of battery cells 21 is larger than the aperture of the liquid outlet 101 close to the front row of battery cells 21.

[0195] The aperture of the liquid outlet 101 may be the area of ​​the cross section of the liquid outlet 101 .

[0196] In some possible designs, in the first direction X, the apertures of all the liquid outlets 101 spaced apart along the first direction X gradually increase. Alternatively, in other possible designs, in the first direction X, the apertures of a portion of the liquid outlets 101 spaced apart along the first direction X gradually increase.

[0197] By adopting the above technical solution, in the first direction X, the aperture of the liquid outlet 101 near the rear battery cell 21 is larger than the aperture of the liquid outlet 101 near the front battery cell 21, which helps to make the flow rate of the thermal management liquid near the rear battery cell 21 greater than the flow rate of the thermal management liquid near the front battery cell 21, thereby helping to further improve the efficiency of heat exchange between the rear battery cell 21 and the battery cell 21, thereby helping to further reduce the temperature difference of the battery device 100 and improve the temperature uniformity of the battery device 100.

[0198] See also Figure 1 , and in conjunction with other drawings. The electrical device provided in the embodiment of the present application includes a battery cell 21 or a battery device 100. The battery device 100 in this embodiment is the same as the battery device 100 in the above embodiments. For details, please refer to the relevant description of the battery device 100 in the above embodiments, which will not be repeated here.

[0199] The electrical device provided in the embodiment of the present application, by adopting the battery device 100 mentioned above, can improve the temperature uniformity of the battery device 100 and the reliability of the battery device 100, thereby improving the reliability of the electrical device.

[0200] The energy storage device provided in the embodiment of the present application includes a battery device 100. The battery device 100 in this embodiment is the same as the battery device 100 in the above embodiments. For details, please refer to the relevant description of the battery device 100 in the above embodiments, which will not be repeated here.

[0201] The energy storage device provided in the embodiment of the present application, by adopting the battery device 100 mentioned above, can improve the temperature uniformity of the battery device 100 and the reliability of the battery device 100, thereby improving the reliability of the energy storage device.

[0202] The energy storage system provided in the embodiment of the present application includes an energy storage device. The energy storage device in this embodiment is the same as the energy storage device in the above embodiments. Please refer to the relevant description of the energy storage device in the above embodiments for details, which will not be repeated here.

[0203] The energy storage system provided in the embodiments of the present application, by adopting the energy storage devices involved in the above embodiments, can improve the temperature uniformity of the battery device 100, improve the reliability of the battery device 100, and thus improve the reliability of the energy storage system.

[0204] The charging network provided in the embodiments of the present application includes charging piles and an energy storage device or energy storage system. The energy storage device is used to provide electrical energy to the charging piles. The energy storage device and energy storage system in this embodiment are the same as those in the above embodiments. For details, please refer to the relevant descriptions of the energy storage device and energy storage system in the above embodiments, and will not be repeated here.

[0205] The charging network provided by the embodiments of the present application, by adopting the energy storage device or energy storage system involved in the above embodiments, can improve the temperature uniformity of the battery device 100, improve the reliability of the battery device 100, and thus improve the reliability of the charging network.

[0206] As one of the embodiments of this application, Figures 3 to 11As shown, the battery device 100 includes a housing 10, a battery cell assembly 20, and a flow diversion structure 30. At least a portion of the battery cell assembly 20 is disposed within the housing 10. The battery cell assembly 20 includes multiple rows of battery cells 21 arranged along a first direction X, with each row of battery cells 21 arranged along a second direction Y. The housing 10 includes a bottom wall 111, on which the battery cell assembly 20 is supported along a third direction Z. The flow diversion structure 30 is at least partially disposed within the housing 10, with battery cell assemblies 20 located on opposite sides of the flow diversion structure 30 along the second direction Y. The diverter structure 30 includes two channels 301 distributed along a second direction Y. The diverter structure 30 is provided with a plurality of liquid inlet holes 302. Multiple liquid outlet holes 303 are provided on opposite sides of the diverter structure 30 along the second direction Y. The liquid inlet holes 302 and the liquid outlet holes 303 are distributed along a first direction X, which represents the direction of liquid flow within the channels 301. Each channel 301 has a liquid inlet hole 302 on its sidewall that communicates with the channel 301. The two channels 301 are respectively connected to the liquid outlet holes 303 on either side of the diverter structure 30. A first partition 32 is provided within the diverter structure 30, dividing the channel 301 into two sub-channels 3011 spaced apart along a third direction Z. The two sub-channels 3011 of the channel 301 are respectively a first sub-channel 3011a and a second sub-channel 3011b. The multiple liquid inlet holes 302 include a first liquid inlet hole 302a and a second liquid inlet hole 302b. The liquid inlet hole 302 on the side wall of each first sub-channel 3011a is a first liquid inlet hole 302a, and the liquid inlet hole 302 on the side wall of each second sub-channel 3011b is a second liquid inlet hole 302b. The first liquid inlet hole 302a is connected to the first sub-channel 3011a, and the second liquid inlet hole 302b is connected to the second sub-channel 3011b. On the same side of the diversion structure 30 along the second direction Y, the multiple liquid outlet holes 303 include a third liquid outlet hole 303c, multiple first liquid outlet holes 303a, and multiple second liquid outlet holes 303b. The multiple first liquid outlet holes 303a are arranged at intervals along the first direction X, and the multiple second liquid outlet holes 303b are arranged at intervals along the first direction X. The first liquid outlet holes 303a and the third liquid outlet holes 303c are both connected to the first branch channel 3011a, and the second liquid outlet hole 303b is connected to the second branch channel 3011b. The first liquid outlet hole 303a, the second liquid outlet hole 303b, and the third liquid outlet hole 303c are distributed in sequence along the first direction X. On the same side of the flow diverter structure 30 along the second direction Y, the diameters of at least some of the first liquid outlet holes 303a gradually increase along the first direction X, and the diameters of at least some of the second liquid outlet holes 303b gradually increase along the first direction X. The diameters of the second liquid outlet holes 303b are larger than the diameters of the first liquid outlet holes 303a, and the diameters of the third liquid outlet holes 303c are larger than the diameters of the second liquid outlet holes 303b. On the same side of the flow diverter structure 30 along the second direction Y, along the third direction Z, the first sub-channel 3011a is located on a side of the second sub-channel 3011b away from the bottom wall 111.On the same side of the diversion structure 30 along the second direction Y, the distance between at least part of the first liquid outlet holes 303a and the bottom wall 111 gradually decreases along the first direction X, and the distance between at least part of the second liquid outlet holes 303b and the bottom wall 111 gradually decreases along the first direction X.

[0207] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A battery device, characterized in that: include: Box; a battery cell assembly, at least partially disposed within the housing; the battery cell assembly comprising a plurality of rows of battery cells arranged along a first direction, the battery cells in each row being arranged along a second direction; A diversion structure is at least partially disposed within the housing, and the battery cell assembly is disposed on at least one side of the diversion structure along the second direction; the diversion structure is provided with a channel and a liquid inlet hole connected to the channel; the diversion structure is provided with a plurality of liquid outlet holes connected to the channel on a side wall facing the battery cell assembly along the second direction, the liquid inlet holes and the liquid outlet holes being distributed along the first direction, which is the flow direction of liquid in the channel; Wherein, on the same side of the diversion structure along the second direction, at least some of the liquid outlet holes are spaced apart along the first direction, and in the first direction, the apertures of at least some of the plurality of liquid outlet holes spaced apart along the first direction gradually increase; The box body includes a bottom wall, and the battery cell assembly is supported on the bottom wall along the third direction; A first partition is provided in the channel, and the first partition divides the channel into a plurality of sub-channels distributed along the third direction, wherein the plurality of sub-channels include a first sub-channel and a second sub-channel distributed along the third direction; On the same side of the diversion structure along the second direction, the plurality of liquid outlet holes include a first liquid outlet hole and a second liquid outlet hole, the first liquid outlet hole is connected to the first branch channel, the second liquid outlet hole is connected to the second branch channel, and the first liquid outlet hole and the second liquid outlet hole are distributed along the first direction; The first direction, the second direction and the third direction are perpendicular to each other.

2. The battery device according to claim 1, wherein: On the same side of the diversion structure along the second direction, in the first direction, distances between at least some of the plurality of liquid outlet holes spaced apart along the first direction and the bottom wall gradually decrease.

3. The battery device according to claim 1, wherein: The aperture of the second liquid outlet hole is larger than the aperture of the first liquid outlet hole.

4. The battery device according to claim 1, wherein: On the same side of the diversion structure along the second direction, the branch channel is connected to the plurality of liquid outlet holes, and among the plurality of liquid outlet holes connected to the branch channel, at least some of the liquid outlet holes are spaced apart along the first direction, and in the first direction, the apertures of at least some of the plurality of liquid outlet holes spaced apart along the first direction gradually increase.

5. The battery device according to claim 1, wherein: On the same side of the diversion structure along the second direction, the branch channel is connected to the plurality of liquid outlet holes, and among the plurality of liquid outlet holes connected to the branch channel, at least some of the liquid outlet holes are spaced apart along the first direction. In the first direction, the distance between at least some of the plurality of liquid outlet holes spaced apart along the first direction and the bottom wall gradually decreases.

6. The battery device according to claim 1, wherein: In the third direction, the first sub-channel is located on a side of the second sub-channel away from the bottom wall.

7. The battery device according to claim 6, characterized in that The plurality of liquid outlet holes further include a third liquid outlet hole, which is connected to the first branch channel; on the same side of the diversion structure along the second direction, at least one of the second liquid outlet hole and the third liquid outlet hole are distributed along the first direction.

8. The battery device according to claim 7, characterized in that The diameter of the third liquid outlet hole is larger than the diameter of the second liquid outlet hole.

9. The battery device according to claim 7, wherein: On the same side of the diversion structure along the second direction, all the second liquid outlet holes and the third liquid outlet holes are distributed along the first direction.

10. The battery device according to claim 1, wherein: The liquid inlet is provided at one end of the diversion structure along the first direction, and the branch channel is connected to the liquid inlet; On the same projection plane perpendicular to the first direction, the orthographic projection of the liquid inlet covers the orthographic projections of all the liquid outlet holes on the corresponding branch channels.

11. The battery device according to claim 1, wherein: Two second separators are provided between two adjacent battery cells along the first direction, and the two second separators are spaced apart along the third direction to form a flow channel; On the same projection plane perpendicular to the first direction, the orthographic projection of the liquid outlet and the orthographic projection of the flow channel are arranged opposite to each other along the second direction.

12. The battery device according to claim 11, wherein: At least one of the first liquid outlet holes is disposed opposite to the battery cell along the second direction, and at least one of the second liquid outlet holes is disposed opposite to the flow channel along the second direction.

13. The battery device according to any one of claims 1 to 12, characterized in that: The battery cell assemblies are provided on both sides of the diversion structure along the second direction; Two channels are provided in the diversion structure, and the two channels are distributed along the second direction; The liquid outlet holes are provided on two side walls of the diversion structure that are opposite to each other along the second direction; In the second direction, the liquid outlets on both sides of the diversion structure are respectively connected to the two channels.

14. The battery device according to any one of claims 1 to 12, characterized in that: The inner wall of the box body is provided with a plurality of liquid outlets, at least some of which are spaced apart along the first direction; In the first direction, the apertures of at least some of the liquid outlets among the plurality of liquid outlets spaced apart along the first direction gradually increase.

15. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1-14.

16. An energy storage device, characterized in that: Comprising the battery device according to any one of claims 1-14.

17. An energy storage system, characterized in that: Comprising the energy storage device according to claim 16.

18. A charging network, characterized in that: It comprises a charging pile and an energy storage device according to claim 16 or an energy storage system according to claim 17, wherein the energy storage device is used to provide electrical energy for the charging pile.

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