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

Abstract

The application 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. The battery device comprises a box body, a battery monomer assembly and a shunt structure. The battery monomer assembly comprises a plurality of rows of battery monomers arranged along a first direction, and each row of battery monomers is arranged along a second direction. The shunt structure is provided with the battery monomer assembly along at least one side of the second direction. The shunt structure is provided with a channel and a liquid inlet hole communicated with the channel. The shunt structure is provided with a plurality of liquid outlet holes communicated with the channel along the second direction and towards the side wall of the battery monomer assembly. The liquid outlet holes are located behind the first liquid outlet hole along the first direction. In the same side of the shunt structure along the second direction, the aperture of at least part of the liquid outlet holes gradually increases in the first direction. In this way, the flow of the heat management liquid through the plurality of liquid outlet holes to the plurality of rows of battery monomers increases along the first direction, 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 usually 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 inevitably conducts to the main body, so that the temperature of the part of the main body close to the tab also rises relatively high, thereby the part of the main body 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:

[0007] a box body;

[0008] 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;

[0009] a shunt structure arranged at least partially in the box body and having the battery monomer assembly on at least one side of the shunt structure 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;

[0010] 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 plurality of liquid outlet holes arranged at intervals along the first direction gradually increases;

[0011] the box body includes a bottom wall, and the battery monomer assembly is supported on the bottom wall along a third direction;

[0012] The first partition is arranged in the channel, and the first partition divides the channel into a plurality of sub-channels distributed along a third direction, the plurality of sub-channels including a first sub-channel and a second sub-channel distributed along the third direction;

[0013] The plurality of liquid outlet holes includes a first liquid outlet hole and a second liquid outlet hole in the same side of the flow distribution 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.

[0014] The first direction, the second direction and the third direction are perpendicular to each other.

[0015] The battery device provided by the embodiment of the present application gradually increases the hole diameter of at least part of the plurality of liquid outlet holes arranged along the first direction in the same side of the flow distribution structure along the second direction, so that the flow rate of the heat management liquid flowing out of the liquid outlet hole gradually increases in the first direction, that is, the flow rate of the heat management liquid flowing to the plurality of battery monomers through the plurality of liquid outlet holes gradually increases in the first direction, so that 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 of the plurality of battery monomers can be reduced, and the temperature uniformity of the battery device can be improved.

[0016] In some embodiments, the distance between at least part of the plurality of liquid outlet holes arranged along the first direction and the bottom wall gradually decreases in the same side of the flow distribution structure along the second direction in the first direction.

[0017] By adopting the above technical solution, when the heat management liquid enters the channel through the liquid inlet hole, the heat management liquid can flow to the liquid outlet hole close to the rear row of battery monomers along the first direction quickly. In this way, the problem that the heat management liquid flows to the liquid outlet hole close to the front row of battery monomers along the first direction first, 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 along 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 through the plurality of liquid outlet holes gradually increases in the first direction can be achieved, so that 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.

[0018] In some embodiments, the hole diameter of the second liquid outlet hole is greater than the hole diameter of the first liquid outlet hole.

[0019] In this way, the flow rate of the heat management liquid in the second sub-passage flowing to the battery cell through the second liquid outlet hole can be greater than the flow rate of the heat management liquid in the first sub-passage flowing to the battery cell through the first liquid outlet hole, so that the efficiency of the heat management liquid in the second sub-passage flowing out and exchanging heat with the battery cell can be higher than the efficiency of the heat management liquid in the first sub-passage flowing out and exchanging heat with the battery cell. In this way, it is beneficial to reduce the temperature difference between the front row of battery cells and the rear row of battery cells, that is, to reduce the temperature difference between the multiple parts of the battery cell corresponding to the multiple sub-paths, thereby improving the temperature uniformity of the multiple parts of the battery cell corresponding to the multiple sub-paths, to improve the temperature uniformity of the battery device.

[0020] In some embodiments, in the same side of the flow distribution structure along the second direction, the sub-paths are communicated with multiple liquid outlet holes, and among the multiple liquid outlet holes communicated with the sub-paths, at least part of the liquid outlet holes are arranged at intervals along the first direction, and in the first direction, the hole diameters of at least part of the liquid outlet holes arranged at intervals along the first direction gradually increase.

[0021] By adopting the above technical solution, the flow rate of the heat management liquid in each sub-passage flowing out through the liquid outlet hole can gradually increase in the first direction, that is, the flow rate of the heat management liquid in each sub-passage flowing to the battery cell through the multiple liquid outlet holes gradually increases in the first direction. In this way, among the multiple parts of the battery cell assembly divided in the first direction, the efficiency of each part of the battery cell exchanging heat with the heat management liquid gradually increases in the first direction, thereby helping to reduce the temperature difference of each part of the battery cell and improve the temperature uniformity of each part of the battery cell, to improve the temperature uniformity of the battery device.

[0022] In some embodiments, in the same side of the flow distribution structure along the second direction, the sub-paths are communicated with multiple liquid outlet holes, and among the multiple liquid outlet holes communicated with the sub-paths, at least part of the liquid outlet holes are arranged at intervals along the first direction, and in the first direction, the distance between at least part of the liquid outlet holes arranged at intervals along the first direction and the bottom wall gradually decreases.

[0023] By adopting the technical scheme, when the heat management liquid enters each sub-channel through the liquid inlet hole, the heat management liquid is beneficial to flow to the liquid outlet hole of the sub-channel close to the rear row of battery monomers in the first direction quickly. In this way, the problem that the heat management liquid in the sub-channel flows to the liquid outlet hole close to the front row of battery monomers in the first direction first, vortex phenomenon occurs around the liquid outlet hole, and the heat management liquid is difficult to flow to the liquid outlet hole of the sub-channel close to the rear row of battery monomers in the first direction can be improved. In this way, the effect that the flow of the heat management liquid in each sub-channel in the first direction gradually increases through the plurality of liquid outlet holes to the plurality of rows of battery monomers can be achieved, so that the efficiency of heat exchange between each part of the battery monomer assembly and the heat management liquid in the first direction gradually increases, and the temperature of each part of the battery monomer assembly can be further reduced, the temperature uniformity of each part of the battery monomer assembly is improved, and the temperature uniformity of the battery device is improved.

[0024] In some embodiments, in the third direction, the first sub-channel is located on the side of the second sub-channel away from the bottom wall.

[0025] By adopting the technical scheme, after the heat management liquid enters the second sub-channel through the second liquid inlet hole, the heat management liquid can flow to the second liquid outlet hole in the second sub-channel quickly. In this way, the problem that the heat management liquid flows to the first liquid outlet hole after entering the first sub-channel through the first liquid inlet hole, vortex phenomenon occurs around the first liquid outlet hole, and the heat management liquid in the box body is difficult to flow to the second sub-flow passage through the second liquid outlet hole can be improved. In this way, the heat management liquid can quickly enter the first sub-flow passage and the second sub-flow passage, and flow to the battery monomer assembly through the first liquid outlet hole and the second liquid outlet hole quickly, so that the effect that the efficiency of heat exchange between the heat management liquid and the battery monomer in the first direction gradually increases can be achieved, and the temperature uniformity of the battery device can be further improved.

[0026] In some embodiments, the plurality of liquid outlet holes further comprises a third liquid outlet hole, the third liquid outlet hole being communicated with the first sub-channel; and in the same side of the sub-flow structure in the second direction, the at least one second liquid outlet hole and the third liquid outlet hole are distributed in the first direction.

[0027] By adopting the technical scheme, the heat management liquid in the first sub-flow passage can flow to the battery monomer corresponding to the second liquid outlet hole through the third liquid outlet hole, which helps to increase the flow of the heat management liquid on the battery monomer corresponding to the second liquid outlet hole, thereby helping to improve the heat exchange efficiency of the battery monomer corresponding to the second liquid outlet hole and the heat management liquid. That is, the third liquid outlet hole can supplement the heat management liquid in the first sub-flow passage to the rear row of battery monomers to improve the heat exchange efficiency of the heat management liquid and the rear row of battery monomers, thereby helping to improve the uniformity of the battery device.

[0028] In some embodiments, the third liquid outlet hole has a larger hole diameter than the second liquid outlet hole.

[0029] By making the third liquid outlet hole have a larger hole diameter than the second liquid outlet hole, the third liquid outlet hole has a larger hole diameter, which is conducive to supplementing the heat management liquid in the first sub-flow passage to the battery monomer corresponding to the second liquid outlet hole to improve the heat exchange efficiency of the battery monomer corresponding to the second liquid outlet hole and the heat management liquid, thereby helping to further improve the uniformity of the battery device.

[0030] In some embodiments, all the second liquid outlet holes are distributed along the first direction with the third liquid outlet hole in the same side of the second direction of the flow distribution structure.

[0031] In this way, the problem that the flow of the heat management liquid is small due to the obstruction of the side wall of the box body away from the liquid inlet hole along the first direction can be improved, thereby helping to further improve the flow of the heat management liquid on the rear row of battery monomers to improve the heat exchange efficiency of the heat management liquid and the rear row of battery monomers, thereby helping to improve the uniformity of the battery device.

[0032] In some embodiments, the liquid inlet hole is arranged at one end of the flow distribution structure along the first direction, and the sub-flow passage is communicated with the liquid inlet hole.

[0033] In the same projection plane perpendicular to the first direction, the orthographic projection of the liquid inlet hole covers the orthographic projection of all the liquid outlet holes on the corresponding sub-flow passage.

[0034] In this way, the heat management liquid entering the sub-flow passage through the liquid inlet hole can quickly flow to all the liquid outlet holes, thereby improving the heat exchange efficiency of the heat management liquid and the battery monomer.

[0035] In some embodiments, two second partition pieces are arranged between two adjacent battery monomers along the first direction, and the two second partition pieces are spaced apart along the third direction to form a flow channel.

[0036] In the same projection plane perpendicular to the first direction, the orthographic projection of the liquid outlet hole is arranged opposite to the orthographic projection of the flow channel along the second direction.

[0037] By adopting the technical scheme, the heat management liquid can flow to the battery monomers in the second direction through the liquid outlet holes, so as to flow into the flow channels, thereby effectively achieving the heat management operation on the battery monomers.

[0038] In some embodiments, the at least one first liquid outlet hole is arranged opposite to the battery monomers in the second direction, and the at least one second liquid outlet hole is arranged opposite to the flow channels in the second direction.

[0039] In this way, the flow resistance of the battery monomers corresponding to the second liquid outlet hole can be smaller than that of the battery monomers corresponding to the first liquid outlet hole, so that the flow rate of the battery monomers corresponding to the second liquid outlet hole can be greater than that of the battery monomers corresponding to the first liquid outlet hole, that is, the flow rate of the battery monomers in the rear row can be greater than that of the battery monomers in the front row, so as to improve the heat exchange efficiency of the battery monomers in the rear row and the heat management liquid. In this way, the temperature difference of the battery device can be further reduced, and the temperature uniformity of the battery device can be improved.

[0040] In some embodiments, the battery monomer assemblies are arranged on both sides of the flow distribution structure in the second direction;

[0041] The flow distribution structure is provided with two channels, and the two channels are distributed in the second direction;

[0042] The flow distribution structure is provided with liquid outlet holes on the two opposite side walls in the second direction;

[0043] In the second direction, the liquid outlet holes on both sides of the flow distribution structure are respectively communicated with the two channels.

[0044] By adopting the technical scheme, the heat management liquid can flow into the two channels respectively, and flow to the battery monomer assemblies on both sides of the flow distribution structure in the second direction through the liquid outlet holes in each channel, so as to respectively achieve the heat management on the battery monomer assemblies on both sides of the flow distribution structure in the second direction. That is, the battery monomer assemblies on both sides of the flow distribution structure in the second direction can be separately heat managed through the corresponding channels. In this way, by adjusting the number, size and specific layout of the liquid outlet holes on each channel, the flow rate of the heat management liquid on each battery monomer assembly can be individually achieved, thereby facilitating the improvement of the temperature uniformity of the battery device.

[0045] In some embodiments, the inner wall of the box body is provided with a plurality of liquid outlet holes, and at least part of the liquid outlet holes are arranged at intervals in the first direction;

[0046] In the first direction, the diameters of at least part of the liquid outlet holes arranged at intervals in the first direction gradually increase.

[0047] By adopting the technical scheme, in the first direction, the aperture of the liquid outlet close to the rear row of battery monomers is larger than the aperture of the liquid outlet close to the front row of battery monomers, which helps to make the flow of the thermal management liquid close to the rear row of battery monomers larger than the flow of the thermal management liquid close to the front row of battery monomers, thereby helping to further improve the efficiency of heat exchange between the rear row of battery monomers and the battery monomers, which helps to further reduce the temperature difference of the battery device and improve the uniformity of the battery device.

[0048] In a second aspect, the embodiments of the present application provide a power utilization device, comprising the battery device.

[0049] The power utilization device provided by the embodiments of the present application can improve the uniformity of the battery device, improve the reliability of the battery device, and improve the reliability of the power utilization device by adopting the above-mentioned battery device.

[0050] In a third aspect, the embodiments of the present application provide an energy storage device, comprising the battery device.

[0051] The energy storage device provided by the embodiments of the present application can improve the uniformity of the battery device, improve the reliability of the battery device, and improve the reliability of the energy storage device by adopting the above-mentioned battery device.

[0052] In a fourth aspect, the embodiments of the present application provide an energy storage system, comprising the energy storage device.

[0053] The energy storage system provided by the embodiments of the present application can improve the uniformity of the battery device, improve the reliability of the battery device, and improve the reliability of the energy storage system by adopting the above-mentioned energy storage device.

[0054] In a fifth aspect, the embodiments of the present application provide a charging network, comprising a charging pile, and comprising an energy storage device or an energy storage system, the energy storage device being used to provide electric energy for the charging pile.

[0055] The charging network provided by the embodiments of the present application can improve the uniformity of the battery device, improve the reliability of the battery device, and improve the reliability of the charging network by adopting the above-mentioned energy storage device or energy storage system.

[0056] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0057] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1 A schematic diagram of a vehicle provided for some embodiments of this application;

[0059] Figure 2 Exploded views of a battery device provided in some embodiments of this application;

[0060] Figure 3 Partial perspective structural view of the battery device housing and current shunt structure provided in some embodiments of this application;

[0061] Figure 4 This is a partial schematic diagram of a battery device provided in some embodiments of this application;

[0062] Figure 5 A three-dimensional structural diagram of the shunt structure of the battery device provided in some embodiments of this application;

[0063] Figure 6 for Figure 5 The front view;

[0064] Figure 7 for Figure 6 Sectional view along AA;

[0065] Figure 8 for Figure 7 Enlarged view of point B in the middle;

[0066] Figure 9 A schematic diagram of two battery cells of a battery device provided in some embodiments of this application;

[0067] Figure 10 for Figure 6 Sectional view along CC;

[0068] Figure 11 for Figure 10 Enlarged view of point D in the middle.

[0069] The following are the labeling elements in the figure:

[0070] 1000 - vehicle; 100 - battery device; 200 - controller; 300 - motor; 10 - box; 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 - flow dividing structure; 301 - passage; 3011 - sub-passage; 3011a - first sub-passage; 3011b - second sub-passage; 302 - liquid inlet hole; 302a - first liquid inlet hole; 302b - second liquid inlet hole; 303 - liquid outlet hole; 303a - first liquid outlet hole; 303b - second liquid outlet hole; 303c - third liquid outlet hole; 31 - main body; 32 - first partition; X - first direction; Y - second direction; Z - third direction. DETAILED DESCRIPTION

[0071] Embodiments of the present application are described below in detail with reference to examples shown in the drawings, wherein the same or similar notations are used to represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0072] If not specifically stated, all embodiments and optional embodiments of the embodiments of the present application can be combined with each other to form new technical solutions.

[0073] If not specifically stated, all technical features and optional technical features of the embodiments of the present application can be combined with each other to form new technical solutions.

[0074] In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0075] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0076] In the description of the embodiments of the present application, the meaning of "multiple" is more than two, and "more than two" includes two, unless otherwise specifically limited. Accordingly, the meaning of "multiple groups" is more than two groups, including two groups.

[0077] In the description of the embodiments of the present application, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0078] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "adjacent" and "adjacent" mean close in position. For example, A1, A2 and B three components, the distance between A1 and B is greater than the distance between A2 and B, then A2 is closer to B than A1, that is, A2 is adjacent to B, and B is also adjacent to A2, in other words, A2 is adjacent to B. For example, when there are multiple C components, multiple C components are C1, C2……CN, and when one of the C components, such as C2, is closer to the B component than the other C components, B is adjacent to C2, and C2 is also adjacent to B, in other words, C2 is adjacent to B.

[0079] Although the present application has been described with reference to the preferred embodiments, various improvements can be made and equivalent parts can be substituted without departing from the scope of the present application. In particular, the technical features mentioned in each embodiment can be combined in any way as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0080] From the development of market situation, the application of battery device is more and more extensive. The battery device is not only applied to the energy storage system such as hydroelectric power station, thermal power station, wind power station and solar power station, but also widely applied to electric bicycle, electric motorcycle, electric vehicle and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery device, the demand of its market is also increasing. And the capacity of battery device is getting larger and larger, the performance requirement of battery device is getting higher and higher, so the thermal management requirement of battery device is getting higher and higher.

[0081] Among them, the battery device can be a power battery or an energy storage battery.

[0082] In the related art, a battery device can include a box body and a plurality of battery monomers arranged in multiple rows in the box body. A flow distribution plate can also be arranged in the box body, and the flow distribution plate is provided with a plurality of liquid outlet holes arranged at intervals towards at least one side of the battery monomers. The heat management liquid can flow into the flow distribution plate and flow into the multiple rows of battery monomers through the plurality of liquid outlet holes on the flow distribution plate to perform heat management on the battery monomers.

[0083] However, the heat management liquid first enters the flow distribution plate and then flows into the multiple rows of battery monomers through the plurality of liquid outlet holes on the flow distribution plate, which inevitably leads to poor uniformity of the battery device. That is, in the multiple rows of battery monomers in the battery device, some battery monomers have a higher temperature and some battery monomers have a lower temperature, resulting in a large temperature difference in the battery device. In this way, the reliability of the battery device is affected.

[0084] Specifically, in some cases, after the heat management liquid enters the flow distribution plate, the heat management liquid exchanges heat with the battery monomers through the flow distribution plate, so that the heat management liquid is heated. In this way, in the flow direction of the heat management liquid in the flow distribution plate, the temperature of the heat management liquid in the flow distribution plate gradually increases. After the heat management liquid in the flow distribution plate flows into the multiple rows of battery monomers through the plurality of liquid outlet holes, in the flow direction of the heat management liquid in the flow distribution plate, the temperature of the heat management liquid flowing into the rear row of battery monomers is higher than the temperature of the heat management liquid flowing into the front row of battery monomers, so that the heat exchange efficiency of the rear row of battery monomers with the heat management liquid is lower than the heat exchange efficiency of the front row of battery monomers with the heat management liquid, thereby the temperature of the rear row of battery monomers is generally higher than the temperature of the front row of battery monomers. In this way, the uniformity of all battery monomers of the battery device is poor.

[0085] Based on the above considerations, 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. Through the flow distribution structure, in the same side in the second direction, in the first direction, the pore diameter of at least part of the plurality of liquid outlet holes arranged at intervals in the first direction gradually increases, so that in the first direction, the flow rate of the heat management liquid flowing out through the liquid outlet holes can gradually increase, that is, in the first direction, the flow rate of the heat management liquid flowing into the multiple rows of battery monomers through the plurality of liquid outlet holes gradually increases, thereby the efficiency of heat exchange between the heat management liquid and the battery monomers in the first direction gradually increases. In this way, the temperature difference of the multiple rows of battery monomers can be reduced, and the uniformity of the battery device can be improved.

[0086] The battery device related in the embodiments of the present application can be a single physical module including one or more battery monomers for providing voltage and capacity. When there are multiple battery monomers, the multiple battery monomers are connected in series, connected in parallel or connected in a mixed manner through a current combining component. The mixed connection means that there are both series connection and parallel connection among the multiple battery monomers.

[0087] In some embodiments, the battery device can be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module. As an example, the multiple battery cells can be fixed to form a battery module by a cable tie or the like. As an example, the multiple battery cells can also be fixed to form a battery module by an end plate, a side plate or the like.

[0088] In some embodiments, the battery device can be a battery pack, which can include a box body and battery cells. As an example, the battery cells can be directly accommodated in the box body. As an example, the multiple battery cells can also be first formed into one or more battery modules, and then accommodated in the box body.

[0089] A battery cell refers to the smallest unit for storing and outputting electric energy. The battery cell can be a secondary battery or a primary battery. The secondary battery refers to a battery cell that can be activated by charging after discharging.

[0090] The battery cell can be in the shape of a cylinder, a flat body, a cuboid or other shapes. The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery or the like.

[0091] The battery device related in the embodiments of the present application can be used in an energy storage device using the battery device as an energy storage element.

[0092] The energy storage device related in the embodiments of the present application can be an energy storage container or an energy storage cabinet.

[0093] The energy storage device can be used in an energy storage power station, a wind power system, a solar power system, a mobile power system or a temporary power supply system or the like. The energy storage device can store electric energy as needed and output electric energy at an appropriate time. For example, the energy storage device can store electric energy at a low electricity consumption valley, and provide electric energy for related users or electric devices at a high electricity consumption peak.

[0094] The energy storage device can include one or more battery clusters, and the battery cluster includes multiple battery devices.

[0095] In some embodiments, in the battery cluster, the multiple battery devices can be connected in series through a current collecting component to improve the voltage of the energy storage device.

[0096] In some embodiments, when the energy storage device includes multiple battery clusters, the multiple battery clusters can be connected in parallel to improve the capacity of the energy storage device.

[0097] In some embodiments, the energy storage device can also include a cabinet body, and the battery cluster is accommodated in the cabinet body.

[0098] In some embodiments, the energy storage device can further include a thermal management module, a master control module, a general control module, a power distribution module, a fire control module, and the like.

[0099] In some embodiments, the thermal management module can include a liquid cooling unit, which provides cooling liquid to each battery device through a pipeline for adjusting the temperature of the battery cell.

[0100] In some embodiments, the master control module can serve as a battery management unit of the battery cluster for monitoring and managing the battery cluster. The master control module can monitor the current, voltage, power, or temperature of the battery cluster, and the like. For example, the master control module can control the charging and discharging current, voltage, and the like of the battery cluster. The master control module includes a slave battery management unit (SBMU), a fusion switch, and the like.

[0101] In some embodiments, the general control module can serve as a battery management unit of the energy storage device for monitoring and managing the energy storage device. The general control module can monitor the current, voltage, power, state of charge, or temperature of the energy storage device, and the like. For example, the general control module can control the charging and discharging current, voltage, and the like of the energy storage device. As an example, the general control module includes an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ether Net (ETH) and fiber conversion module, and the like.

[0102] In some embodiments, the fire control module can include a control panel, a detector, an alarm device, and the like for detecting, alarming, or extinguishing the energy storage device.

[0103] In some embodiments, the power distribution module can be used to distribute power to the modules that need power in the energy storage device.

[0104] The energy storage system related to the embodiments of the present application can be any power system that needs to use an energy storage device.

[0105] The energy storage system related to the embodiments of the present application can include an energy storage device. The energy storage system can be connected to a power grid or a microgrid; or the energy storage system can be coupled to a power generation device; or the energy storage system can be connected to a power consumption device. The number of energy storage devices can be one or more.

[0106] The charging network related to the embodiments of the present application can include a charging pile and an energy storage device, the charging pile being electrically connected to the energy storage device, and the energy storage device being used to provide power for the charging pile.

[0107] The battery device in the energy storage device can be electrically connected to the charging pile through a cable, and the battery device can provide the stored electric energy to the charging pile.

[0108] The charging pile can have one or more connectors for connecting to an electric device (such as a vehicle) to provide power to the electric device.

[0109] The energy storage device can be located inside the charging pile (for example, a charging and storage integrated machine) or outside the charging pile.

[0110] The battery device provided in the embodiments of the present application can also be used in an electric device using the battery device as a power source.

[0111] The electric 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, and 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 electric car, or an extended range car, etc. According to the driving mode, the vehicle can be a front-wheel drive car, a rear-wheel drive car, or an all-wheel drive car.

[0112] For ease of description, the embodiments of the present application take the electric device as a vehicle for example.

[0113] In some embodiments, please refer to Figure 1 , Figure 1 A schematic diagram of the vehicle 1000 provided in some embodiments of the present application is shown. The vehicle 1000 is internally provided with a 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 an operating power source 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.

[0114] In some embodiments, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0115] In some embodiments, please refer to Figure 2 , Figure 2An exploded view of a battery device 100 is provided for some embodiments of the present application. The battery device 100 can include a case 10 and battery cells 21. The case 10 is a structure having an interior space, and the interior space of the case 10 is used to accommodate the battery cells 21.

[0116] The case 10 can adopt various structures. In some embodiments, the case 10 can include a first part 11 and a second part 12, the first part 11 and the second part 12 are covered with each other and jointly define an interior space of the case 10, and the interior space of the case 10 is a closed space. Here, the closed means covered or closed, which can be sealed or unsealed. That is, the case 10 can be a sealed structure or an unsealed structure. Please refer to Figure 2 , the first part 11 and the second part 12 can each be a hollow structure having an opening at one end, the opening side of the first part 11 is covered with the opening side of the second part 12, so that the first part 11 and the second part 12 jointly define the interior space of the case 10. Alternatively, the first part 11 can be a hollow structure having an opening at one end, and the second part 12 is a plate structure, the second part 12 is covered with the opening side of the first part 11, so that the first part 11 and the second part 12 jointly define the interior space of the case 10. Among them, the case 10 composed of the first part 11 and the second part 12 can be various shapes, such as a cylinder, a cuboid, etc.

[0117] In some embodiments, a plurality of battery cells 21 can be connected in series, parallel or mixed connection to form a whole, and then the whole formed by the plurality of battery cells 21 is directly accommodated in the interior space of the case 10. In other embodiments, the plurality of battery cells 21 can also be connected in series, parallel or mixed connection, and arranged and fixed to form a battery module, and the battery module is accommodated in the interior space of the case 10. In yet other embodiments, the plurality of battery cells 21 can also be connected in series, parallel or mixed connection, and arranged and fixed to form a plurality of battery modules, and the plurality of battery modules are connected in series, parallel or mixed connection to form a whole, and are accommodated in the interior space of the case 10.

[0118] In some embodiments, please refer to Figure 1 and Figure 2 , the case 10 of the battery device 100 can be part of the chassis structure of the vehicle 1000. For example, part of the case 10 can be at least part of the floor of the vehicle 1000, or part of the case 10 can be at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0119] Please refer to Figures 3 to 5 together with other drawings. Among them, Figure 3 is a partial perspective view of the case 10 and the shunt structure 30 of the battery device 100 provided for some embodiments of the present application, Figure 4A partial schematic view of a battery device 100 according to some embodiments of the present application is provided, Figure 5 A perspective view of a flow distribution structure 30 of a battery device 100 according to some embodiments of the present application is provided. Figure 5 In some embodiments of the present application, at least part of the first partition 32 is shown by a dashed line. The battery device 100 according to some embodiments of the present application comprises a box 10, a battery cell assembly 20, and a flow distribution structure 30. At least part of the battery cell assembly 20 is arranged in the box 10. The battery cell assembly 20 comprises a plurality of rows of battery cells 21, and the plurality of 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, and the first direction X and the second direction Y are perpendicular to each other. At least part of the flow distribution structure 30 is arranged in the box 10, and the flow distribution structure 30 has the battery cell assembly 20 on at least one side thereof along the second direction Y. The flow distribution structure 30 is provided with a channel 301 and a liquid inlet hole 302 communicating with the channel 301. The flow distribution structure 30 is provided with a plurality of liquid outlet holes 303 on a side thereof along the second direction Y and facing a side wall of the battery cell assembly 20, and the plurality of liquid outlet holes 303 all communicate with the channel 301. The liquid inlet hole 302 and the liquid outlet holes 303 are distributed along the first direction X, and the first direction X is the flow direction of the liquid in the channel 301. In the same side of the flow distribution structure 30 along the second direction Y, at least part of the liquid outlet holes 303 are arranged at intervals along the first direction X. In the same side of the flow distribution structure 30 along the second direction Y, the diameters of at least part of the liquid outlet holes 303 arranged at intervals along the first direction X gradually increase in the first direction X.

[0120] The battery cell assembly 20 refers to an assembly structure of a plurality of battery cells 21.

[0121] Each row of battery cells 21 can comprise at least one battery cell 21. Each row of battery cells 21 arranged along the second direction Y means that when each row of battery cells 21 comprises a plurality of battery cells 21, the plurality of battery cells 21 of each row are distributed along the second direction Y. The second direction Y is the distribution direction of each row of battery cells 21, which can be a double arrow direction.

[0122] The flow distribution structure 30 refers to a structure for circulating a heat management liquid and allowing the heat management liquid to flow out. The heat management liquid can be but is not limited to a cooling liquid.

[0123] The channel 301 is arranged in the flow distribution structure 30, and is a cavity or flow passage 201 of the flow distribution structure 30 for circulating the heat management liquid. The liquid inlet hole 302 is an opening of the flow distribution structure 30 for allowing the heat management liquid to enter the channel 301, and the liquid outlet hole 303 is an opening of the flow distribution structure 30 for allowing the heat management liquid in the channel 301 to flow out.

[0124] It can be understood that the battery monomer assembly 20 and the shunt structure 30 are distributed along the second direction Y, and the liquid outlet hole 303 is arranged opposite to the battery monomer assembly 20 along the second direction Y.

[0125] It can be understood that the battery device 100 can include at least one battery monomer assembly 20. Among them, in some possible designs, as shown in the figure, Figure 4 As shown in the figure, the shunt structure 30 has battery monomer assemblies 20 on both sides along the second direction Y, the shunt structure 30 is provided with liquid outlet holes 303 on the opposite two side walls along the second direction Y, and in the second direction Y, the heat management liquid in the channel 301 can flow to the battery monomer assembly 20 on the corresponding side through the liquid outlet hole 303 on each side. Or, in another possible design, the shunt structure 30 has a battery monomer assembly 20 on one side along the second direction Y, the shunt structure 30 is provided with a liquid outlet hole 303 on the side wall facing the battery monomer 21 along the second direction Y, and the heat management liquid in the channel 301 can flow to the battery monomer assembly 20 through the liquid outlet hole 303.

[0126] It can be understood that the first direction X is the general flow direction of the heat management liquid in the channel 301. Among them, the heat management liquid in the channel 301 can flow straight or curved along the first direction X. Specifically, the first direction X is the distribution direction of the liquid inlet hole 302 and the liquid outlet hole 303, which is a one-way direction, that is, the general direction of the flow of the heat management liquid from the liquid inlet hole 302 to the liquid outlet hole 303. And the first direction X is generally parallel to the distribution direction of the multiple rows of battery monomers 21 in the battery monomer assembly 20.

[0127] Among them, a plurality of liquid outlet holes 303 are arranged on the shunt structure 30, and the liquid inlet hole 302 and the liquid outlet hole 303 are arranged on the shunt structure 30.

[0128] “In the same side of the shunt structure 30 along the second direction Y, at least part of the liquid outlet holes 303 are arranged along the first direction X” includes a plurality of liquid outlet holes 303.

[0129] In the same side of the shunt structure 30 along the second direction Y, at least part of the liquid outlet holes 303 of the plurality of liquid outlet holes 303 are arranged along the first direction X, so that the heat management liquid in the channel 301 can flow to the battery monomer assembly 20 through the plurality of liquid outlet holes 303, that is, the heat management liquid in the channel 301 can flow to the battery monomer assembly 20 through multiple positions of the shunt structure 30 along the first direction X, respectively, so as to flow to the multiple rows of battery monomers 21 of the battery monomer assembly 20 along the first direction X. In this way, the multiple rows of battery monomers 21 of the battery monomer assembly 20 along the first direction X are all in full contact with the heat management liquid and exchange heat.

[0130] In the same side of the flow distribution structure 30 along the second direction Y, in the first direction X, the hole diameter of at least part of the plurality of liquid outlet holes 303 arranged along the first direction X at intervals gradually increases, which means that, in the same side of the flow distribution structure 30 along the second direction Y, in the plurality of liquid outlet holes 303 arranged along the first direction X at intervals, the hole diameter of the liquid outlet hole 303 closer to the rear row of battery monomers 21 is greater than the hole diameter of the liquid outlet hole 303 closer to the front row of battery monomers 21 in the first direction X.

[0131] Wherein, the front row of battery monomers 21 and the rear row of battery monomers 21 are relative, that is, the front row of battery monomers 21 and the rear row of battery monomers 21 are arranged in sequence along the first direction X.

[0132] Wherein, in some possible designs, as shown in Figure 5 In some possible designs, as shown in

[0133] Wherein, the hole diameter of the liquid outlet hole 303 refers to the area of the cross section of the liquid outlet hole 303 perpendicular to the second direction Y.

[0134] The battery device 100 provided by the embodiment of the present application gradually increases the hole diameter of at least part of the plurality of liquid outlet holes 303 arranged along the first direction X at intervals in the same side of the flow distribution structure 30 along the second direction Y, so that the flow rate of the heat management liquid flowing out of the liquid outlet hole 303 in the first direction X can gradually increase, that is, the flow rate of the heat management liquid flowing to the plurality of rows of battery monomers 21 through the plurality of liquid outlet holes 303 in the first direction X gradually increases, so that the efficiency of heat exchange between the heat management liquid and the battery monomers 21 in the first direction X gradually increases. Specifically, the flow rate of the heat management liquid flowing to the rear row of battery monomers 21 in the first direction X can be greater than the flow rate of the heat management liquid flowing to the front row of battery monomers 21, so that the efficiency of heat exchange between the heat management liquid and the rear row of battery monomers 21 can be greater than the efficiency of heat exchange between the heat management liquid and the front row of battery monomers 21. In this way, the temperature difference between the plurality of rows of battery monomers 21 can be reduced, the temperature uniformity of the battery device 100 can be improved, and the reliability of the battery device 100 can be improved.

[0135] In some embodiments, please refer to Figure 3and other drawings. The box 10 comprises 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.

[0136] Specifically, the bottom wall 111 and the battery cell assembly 20 are distributed along the third direction Z. The third direction Z is the distribution direction of the bottom wall 111 and the battery cell 21, and can be a double arrow direction.

[0137] As an example, the first direction X can be the length direction of the battery device 100, the second direction Y can be the width direction of the battery device 100, and the third direction Z can be the height direction of the battery device 100.

[0138] In some embodiments, please refer to Figure 3 and Figure 5 and other drawings. In the same side of the flow distribution structure 30 along the second direction Y, the distance between at least part of the plurality of liquid outlet holes 303 arranged at intervals along the first direction X and the bottom wall 111 gradually decreases in the first direction X.

[0139] It can be understood that, in the same side of the flow distribution structure 30 along the second direction Y, among the at least part of the plurality of liquid outlet holes 303 arranged at intervals along the first direction X, the distance between any two liquid outlet holes 303 and the bottom wall 111 in the first direction X is smaller for the liquid outlet hole 303 closer to the rear row of battery cells 21 than for the liquid outlet hole 303 closer to the front row of battery cells 21.

[0140] In some possible designs, in the same side of the flow distribution structure 30 along the second direction Y, the distance between part of the plurality of liquid outlet holes 303 arranged at intervals along the first direction X and the bottom wall 111 gradually decreases in the first direction X. Alternatively, in other possible designs, in the same side of the flow distribution structure 30 along the second direction Y, the distance between all the plurality of liquid outlet holes 303 arranged at intervals along the first direction X and the bottom wall 111 gradually decreases in the first direction X.

[0141] In some possible designs, in the same side of the flow distribution structure 30 along the second direction Y, the distance between part of the plurality of liquid outlet holes 303 arranged at intervals along the first direction X and the bottom wall 111 gradually decreases in the first direction X. Alternatively, in other possible designs, in the same side of the flow distribution structure 30 along the second direction Y, the distance between all the plurality of liquid outlet holes 303 arranged at intervals along the first direction X and the bottom wall 111 gradually decreases in the first direction X.

[0142] By adopting the above technical solution, when the thermal management liquid enters the channel 301 through the inlet 302, it facilitates rapid flow to the outlet 303 near the rear row of battery cells 21 along the first direction X. This avoids the problem where the thermal management liquid in the channel 301 initially flows to the outlet 303 near the front row of battery cells 21 along the first direction X, causing eddies around the outlet 303 and hindering its flow to the outlet 303 near the rear row of battery cells 21. This arrangement facilitates a gradual increase in the flow rate of the thermal management liquid through multiple outlets 303 to multiple rows of battery cells 21 along the first direction X, thereby gradually increasing the efficiency of heat exchange between the thermal management liquid and the battery cells 21 along the first direction X, and further improving the temperature uniformity of the battery device 100.

[0143] In some embodiments, please refer to the following: Figures 3 to 8 And in conjunction with other accompanying figures. Figure 6 for Figure 5 Front view, Figure 7 for Figure 6 A sectional view along AA, Figure 8 for Figure 7 Enlarged view of point B in the middle. Figure 6 In the diagram, at least a portion of the first separator 32 is shown by a dashed line, which divides the first sub-channel 3011a and the second sub-channel 3011b. The channel 301 is provided with the first separator 32, which divides the channel 301 into multiple sub-channels 3011. These sub-channels 3011 are distributed along a third direction Z. The third direction Z is perpendicular to the first direction X, and 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 a portion of the liquid outlets 303 on the multiple sub-channels 3011 are distributed along the first direction X.

[0144] The first separator 32 refers to the component used to divide the channel 301 into multiple sub-channels 3011, where each sub-channel 3011 is a sub-cavity within the channel 301.

[0145] The third direction Z is the distribution direction of the multiple sub-channels 3011 in channel 301, and it is a double arrow direction.

[0146] Understandably, each sub-channel 3011 corresponds to at least one liquid outlet 303, and each sub-channel 3011 is connected to its corresponding liquid outlet 303. That is, each sub-channel 3011 has a liquid outlet 303 on its sidewall. 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.

[0147] It can be understood that each sub-channel 3011 corresponds to a liquid inlet hole 302, and each sub-channel 3011 communicates with the corresponding liquid inlet hole 302. That is, the side wall of each sub-channel 3011 is provided with a liquid inlet hole 302. In this way, the heat management liquid can flow into the corresponding sub-channel 3011 through the liquid inlet hole 302, and then flow onto the battery monomer assembly 20 through the corresponding liquid outlet hole 303.

[0148] The "at least part of the liquid outlet holes 303 on the plurality of sub-channels 3011 is distributed along the first direction X in the same side of the shunt structure 30 along the second direction Y" includes at least one liquid outlet hole 303. The "at least part of the liquid outlet holes 303 on the plurality of sub-channels 3011 is distributed along the first direction X" means that at least part of the liquid outlet holes 303 on one of the two sub-channels 3011 and at least part of the liquid outlet holes 303 on the other sub-channel 3011 are distributed along the first direction X.

[0149] It can be understood that the channel 301 is divided into a plurality of parts, that is, a plurality of sub-channels 3011. And in the same side of the shunt structure 30 along the second direction Y, the plurality of liquid outlet holes 303 is divided into a plurality of parts, and the plurality of part liquid outlet holes 303 and the plurality of sub-channels 3011 are one-to-one correspondence and communication. Based on this, the plurality of rows of battery monomers 21 of the battery monomer assembly 20 can be divided into a plurality of parts along the first direction X, and the plurality of part battery monomers 21 are one-to-one correspondence with the plurality of part liquid outlet holes 303. In this way, the heat management liquid can flow into the plurality of sub-channels 3011 respectively, and flow onto the corresponding part of the battery monomer 21 through the corresponding liquid outlet hole 303.

[0150] In this way, the plurality of rows of battery monomers 21 of the battery monomer assembly 20 can be divided into a plurality of parts along the first direction X, and each part of the battery monomer 21 can be heat managed by the heat management liquid in the corresponding sub-channel 3011, that is, the plurality of part battery monomers 21 of the battery monomer assembly 20 can be heat managed separately. In this way, by adjusting the number, size and specific layout of the liquid outlet holes 303 on each sub-channel 3011, the flow of the heat management liquid on each part of the battery monomer 21 can be realized separately, thereby facilitating the improvement of the uniformity of the battery device 100.

[0151] Wherein, by separately adjusting the flow of the heat management liquid on each part of the battery monomer 21, the heat management liquid on each part of the battery monomer 21 can overcome the flow resistance on the part of the battery monomer 21.

[0152] Specifically, as Figures 3 to 8As shown, and in conjunction with other figures. The plurality of sub-channels 3011 includes a first sub-channel 3011a and a second sub-channel 3011b distributed along the third direction Z. In the same side of the flow distribution structure 30 along the second direction Y, the plurality of liquid outlets 303 includes a first liquid outlet 303a and a second liquid outlet 303b, the first liquid outlet 303a is communicated with the first sub-channel 3011a, and the second liquid outlet 303b is communicated with the second sub-channel 3011b, the first liquid outlet 303a and the second liquid outlet 303b are distributed along the first direction X.

[0153] It can be understood that, in the plurality of sub-channels 3011, any two sub-channels 3011 can be the first sub-channel 3011a and the second sub-channel 3011b respectively. In the same side of the flow distribution structure 30 along the second direction Y, at least two liquid outlets 303 in the plurality of liquid outlets 303 can be the first liquid outlet 303a and the second liquid outlet 303b respectively. Among them, the first liquid outlet 303a is the liquid outlet 303 on the side wall of the first sub-channel 3011a, and the first liquid outlet 303a is communicated with the first sub-channel 3011a. The second liquid outlet 303b is the liquid outlet 303 on the side wall of the second sub-channel 3011b, and the second sub-channel 3011b is communicated with the second liquid outlet 303b.

[0154] Among them, the number of the first liquid outlet 303a in the same side of the flow distribution structure 30 along the second direction Y is at least one. The number of the second liquid outlet 303b in the same side of the flow distribution structure 30 along the second direction Y is at least one.

[0155] The first liquid outlet 303a and the second liquid outlet 303b are distributed along the first direction X, which means that the second liquid outlet 303b is located behind the first liquid outlet 303a along the first direction X.

[0156] As an example, as shown in FIG. 6, the first liquid outlet 303a and the second liquid outlet 303b are distributed along the first direction X, which means that the second liquid outlet 303b is located behind the first liquid outlet 303a along the first direction X. Figures 3 to 8As shown, the channel 301 is divided into two sub-channels 3011, and the two sub-channels 3011 are respectively a first sub-channel 3011a and a second sub-channel 3011b. In the same side of the flow distribution structure 30 along the second direction Y, the 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 side wall of the first sub-channel 3011a, and the first liquid outlet 303a is communicated with the first sub-channel 3011a. The second liquid outlet 303b is a liquid outlet 303 on the side wall of the second sub-channel 3011b, and the second sub-channel 3011b is communicated with the second liquid outlet 303b. The plurality of battery monomers 21 in the battery monomer assembly 20 are divided into two parts along the first direction X, and the two parts are respectively a front row of battery monomers 21 and a rear row of battery monomers 21. The first liquid outlet 303a and the front row of battery monomers 21 are correspondingly arranged, and specifically arranged opposite to each other along the second direction Y. The second liquid outlet 303b and the rear row of battery monomers 21 are correspondingly arranged, and specifically arranged opposite to each other along the second direction Y. Based on this, the heat management liquid can flow into the first sub-channel 3011a and the second sub-channel 3011b respectively, the heat management liquid in the first sub-channel 3011a can flow onto the front row of battery monomers 21 through the first liquid outlet 303a, and the heat management liquid in the second sub-channel 3011b can flow onto the rear row of battery monomers 21 through the second liquid outlet 303b. In this way, by adjusting the number, size and specific layout of the first liquid outlet 303a and the second liquid outlet 303b, the flow of the heat management liquid on the front row of battery monomers 21 and the rear row of battery monomers 21 can be adjusted separately, thereby facilitating the improvement of the uniformity of the battery device 100.

[0157] It needs to be explained here that the battery monomer 21 corresponding to the first liquid outlet 303a in the following refers to the battery monomer 21 arranged opposite to the first liquid outlet 303a along the second direction Y. The battery monomer 21 corresponding to the second liquid outlet 303b refers to the battery monomer 21 arranged opposite to the second liquid outlet 303b along the second direction Y.

[0158] In some embodiments, please refer to Figures 3 to 8 , and combine with other drawings. The first liquid outlet 303a and the second liquid outlet 303b are distributed along the first direction X, and the aperture of the second liquid outlet 303b is larger than the aperture of the first liquid outlet 303a.

[0159] It can be understood that the cross-sectional area of the second liquid outlet 303b perpendicular to the second direction Y is larger than the cross-sectional area of the first liquid outlet 303a perpendicular to the second direction Y.

[0160] In this way, in the same side of the second direction Y of the flow distribution structure 30, in the first direction X, the hole diameters of at least part of the plurality of liquid outlet holes 303 arranged at intervals in the first direction X gradually increase, so that in the first direction X, the flow rate of the heat management liquid flowing out of the liquid outlet holes 303 gradually increases. In this way, in the first direction X, the flow rate of the heat management liquid flowing to the plurality of battery cells 21 through the plurality of liquid outlet holes 303 gradually increases, so that in the first direction X, the efficiency of heat exchange between the heat management liquid and the battery cells 21 gradually increases.

[0161] Specifically, the flow rate of the heat management liquid in the second sub-channel 3011b flowing to the battery cells 21 through the second liquid outlet hole 303b can be greater than the flow rate of the heat management liquid in the first sub-channel 3011a flowing to the battery cells 21 through the first liquid outlet hole 303a, so that the efficiency of the heat management liquid in the second sub-channel 3011b flowing out and exchanging heat with the battery cells 21 can be higher than the efficiency of the heat management liquid in the first sub-channel 3011a flowing out and exchanging heat with the battery cells 21. In this way, in the first direction X, the heat exchange efficiency of the rear row of battery cells 21 with the heat management liquid is higher than the heat exchange efficiency of the front row of battery cells 21 with the heat management liquid. In this way, it is beneficial to reduce the temperature difference between the front row of battery cells 21 and the rear row of battery cells 21, i.e., to reduce the temperature difference between the multiple parts of battery cells 21 corresponding to the plurality of sub-channels 3011, thereby improving the temperature uniformity of the multiple parts of battery cells 21 corresponding to the plurality of sub-channels 3011, to improve the temperature uniformity of the battery device 100.

[0162] It should be noted here that the liquid inlet hole 302 on the side wall of the first sub-channel 3011a is a first liquid inlet hole 302a, which communicates with the first sub-channel 3011a, and the heat management liquid can enter the first sub-channel 3011a through the first liquid inlet hole 302a. The liquid inlet hole 302 on the side wall of the second sub-channel 3011b is a second liquid inlet hole 302b, which communicates with the second sub-channel 3011b, and the heat management liquid can enter the second sub-channel 3011b through the second liquid inlet hole 302b.

[0163] In some embodiments, please refer to Figures 3 to 8 , and in combination with other drawings. In the same side of the second direction Y of the flow distribution structure 30, the sub-channels 3011 communicate with the plurality of liquid outlet holes 303. In the same side of the second direction Y of the flow distribution structure 30, at least part of the plurality of liquid outlet holes 303 communicating with the sub-channels 3011 are arranged at intervals in the first direction X.

[0164] Understandably, in the same side of the flow distribution structure 30 along the second direction Y, a plurality of liquid outlet holes 303 are arranged on the side wall of the distribution channel 3011, and the plurality of liquid outlet holes 303 are all communicated with the distribution channel 3011.

[0165] In the "at least part of the liquid outlet holes 303" in "in the same side of the flow distribution structure 30 along the second direction Y, at least part of the liquid outlet holes 303 communicated with the distribution channel 3011 are arranged along the first direction X", the plurality of liquid outlet holes 303 are included. Understandably, in the same side of the flow distribution structure 30 along the second direction Y, at least part of the liquid outlet holes 303 on the distribution channel 3011 are arranged along the first direction X.

[0166] In some possible designs, as shown in Figures 3 to 8 , in the same side of the flow distribution structure 30 along the second direction Y, all the liquid outlet holes 303 on the distribution channel 3011 are arranged along the first direction X. Alternatively, in the same side of the flow distribution structure 30 along the second direction Y, part of the liquid outlet holes 303 on the distribution channel 3011 are arranged along the first direction X.

[0167] In some possible designs, as shown in Figures 3 to 8 , in the same side of the flow distribution structure 30 along the second direction Y, the number of the first liquid outlet holes 303a is a plurality, and at least part of the first liquid outlet holes 303a are arranged along the first direction X. In this way, the heat management liquid in the first distribution channel 3011a can flow to the front row of battery monomers 21 through the plurality of first liquid outlet holes 303a, and then flow to the plurality of parts of the front row of battery monomers 21 along the first direction X, respectively.

[0168] In some possible designs, as shown in Figures 3 to 8 , in the same side of the flow distribution structure 30 along the second direction Y, the number of the second liquid outlet holes 303b is a plurality, and at least part of the second liquid outlet holes 303b are arranged along the first direction X. In this way, the heat management liquid in the second distribution channel 3011b can flow to the front row of battery monomers 21 through the plurality of second liquid outlet holes 303b, and then flow to the plurality of parts of the front row of battery monomers 21 along the first direction X, respectively.

[0169] In some embodiments, please refer to Figures 3 to 8 , and in combination with other drawings. In the same side of the flow distribution structure 30 along the second direction Y, in the plurality of liquid outlet holes 303 communicated with the distribution channel 3011, at least part of the liquid outlet holes 303 arranged along the first direction X among the plurality of liquid outlet holes 303 arranged along the first direction X gradually increase in aperture.

[0170] The "at least part of the plurality of liquid outlet holes 303" in "in the first direction X, the aperture of at least part of the plurality of liquid outlet holes 303 arranged at intervals in the first direction X gradually increases" includes the plurality of liquid outlet holes 303.

[0171] It can be understood that, in the same side of the flow distribution structure 30 along the second direction Y, among the plurality of liquid outlet holes 303 arranged at intervals in the first direction X on the flow distribution channel 3011, the aperture of the liquid outlet hole 303 closer to the rear row of battery monomers 21 is greater than the aperture of the liquid outlet hole 303 closer to the front row of battery monomers 21 in the first direction X.

[0172] In some possible designs, as shown in FIG. 6, in the same side of the flow distribution structure 30 along the second direction Y, the aperture of all the liquid outlet holes 303 arranged at intervals in the first direction X in the plurality of liquid outlet holes 303 in communication with the flow distribution channel 3011 gradually increases in the first direction X. Figure 5 In other possible designs, as shown in FIG. 7, in the same side of the flow distribution structure 30 along the second direction Y, the aperture of part of the plurality of liquid outlet holes 303 arranged at intervals in the first direction X in the plurality of liquid outlet holes 303 in communication with the flow distribution channel 3011 gradually increases in the first direction X.

[0173] In some possible designs, as shown in FIG. 8, in the same side of the flow distribution structure 30 along the second direction Y, the aperture of at least part of the plurality of first liquid outlet holes 303a arranged at intervals in the first direction X gradually increases in the first direction X. Figures 3 to 8 In some possible designs, as shown in FIG. 9, in the same side of the flow distribution structure 30 along the second direction Y, the aperture of at least part of the plurality of second liquid outlet holes 303b arranged at intervals in the first direction X gradually increases in the first direction X.

[0174] Figures 3 to 8 In some possible designs, as shown in FIG. 9, in the same side of the flow distribution structure 30 along the second direction Y, the aperture of at least part of the plurality of second liquid outlet holes 303b arranged at intervals in the first direction X gradually increases in the first direction X.

[0175] By adopting the above technical solutions, the flow of the heat management liquid in each flow distribution channel 3011 out of the liquid outlet holes 303 gradually increases in the first direction X, that is, the flow of the heat management liquid in each flow distribution channel 3011 to the battery monomers 21 through the plurality of liquid outlet holes 303 gradually increases in the first direction X. In this way, the efficiency of heat exchange between the heat management liquid and each part of the battery monomers 21 gradually increases in the plurality of parts of the battery monomer assembly 20 divided in the first direction X, thereby helping to reduce the temperature difference of each part of the battery monomers 21, improve the uniformity of each part of the battery monomers 21, and improve the uniformity of the battery device 100.

[0176] ​In some embodiments, please refer to Figures 3 to 8 , and in combination with other drawings. In the same side of the flow distribution structure 30 along the second direction Y, among the plurality of liquid outlet holes 303 in communication with the flow distribution channel 3011, the distance between at least part of the plurality of liquid outlet holes 303 arranged along the first direction X and the bottom wall 111 gradually decreases in the first direction X.

[0177] The "at least part of the plurality of liquid outlet holes 303" in "the distance between at least part of the plurality of liquid outlet holes 303 arranged along the first direction X and the bottom wall 111 gradually decreases in the first direction X" includes the plurality of liquid outlet holes 303.

[0178] It can be understood that, in the same side of the flow distribution structure 30 along the second direction Y, among the plurality of liquid outlet holes 303 arranged along the first direction X on the flow distribution channel 3011, the distance between 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 monomers 21 and the bottom wall 111 is smaller than the distance between the liquid outlet hole 303 close to the front row of battery monomers 21 and the bottom wall 111.

[0179] Among them, in some possible designs, in the same side of the flow distribution structure 30 along the second direction Y, among the plurality of liquid outlet holes 303 in communication with the flow distribution channel 3011, the distance between all the liquid outlet holes 303 arranged along the first direction X in the first direction X and the bottom wall 111 gradually decreases. Or, in another possible design, in the same side of the flow distribution structure 30 along the second direction Y, among the plurality of liquid outlet holes 303 in communication with the flow distribution channel 3011, the distance between part of the plurality of liquid outlet holes 303 arranged along the first direction X in the first direction X and the bottom wall 111 gradually decreases.

[0180] In some possible designs, as shown in Figures 3 to 8 , in the same side of the flow distribution structure 30 along the second direction Y, among the plurality of first liquid outlet holes 303a arranged along the first direction X in the first direction X, the distance between at least part of the plurality of first liquid outlet holes 303a and the bottom wall 111 gradually decreases.

[0181] In some possible designs, as shown in Figures 3 to 8 , in the same side of the flow distribution structure 30 along the second direction Y, among the plurality of second liquid outlet holes 303b arranged along the first direction X in the first direction X, the distance between at least part of the plurality of second liquid outlet holes 303b and the bottom wall 111 gradually decreases.

[0182] By adopting the above technical solution, when the heat management liquid enters each sub-channel 3011 through the liquid inlet hole 302, it is beneficial for the heat management liquid to quickly flow to the liquid outlet hole 303 of the sub-channel 3011 close to the rear row of battery monomers 21 in the first direction X. In this way, the problem that the heat management liquid in the sub-channel 3011 first flows to the liquid outlet hole 303 close to the front row of battery monomers 21 in the first direction X, causing vortex phenomenon around the liquid outlet hole 303, and making it difficult for the heat management liquid to flow to the liquid outlet hole 303 of the sub-channel 3011 close to the rear row of battery monomers 21 in the first direction X can be improved. In this way, the effect that the flow of the heat management liquid in each sub-channel 3011 through the plurality of liquid outlet holes 303 to the plurality of rows of battery monomers 21 gradually increases in the first direction X is facilitated, thereby facilitating the effect that the efficiency of heat exchange between each part of the battery monomer assembly 20 and the heat management liquid gradually increases in the first direction X, thereby being able to further reduce the temperature of each part of the battery monomer 21, improve the uniformity of each part of the battery monomer 21, and improve the uniformity of the battery device 100.

[0183] In some embodiments, please refer to Figures 3 to 8 , and in combination with other drawings. The box 10 includes a bottom wall 111, and the battery monomer assembly 20 is supported on the bottom wall 111 in the third direction Z. In the third direction Z, the first sub-channel 3011a is located on the side away from the bottom wall 111 of the second sub-channel 3011b.

[0184] 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. In this way, in the third direction Z, the second liquid outlet hole 303b is closer to the bottom wall 111 than the first liquid outlet hole 303a.

[0185] By adopting the technical scheme, after the heat management liquid enters the second sub-passage 3011b through the second liquid inlet hole 302b, the heat management liquid can quickly flow to the second liquid outlet hole 303b in the second sub-passage 3011b. In this way, the problem that the heat management liquid flowing to the first liquid outlet hole 303a after entering the first sub-passage 3011a through the first liquid inlet hole 302a causes vortex phenomenon around the first liquid outlet hole 303a, and the heat management liquid in the box 10 flows to the second sub-flow passage 201 through the second liquid outlet hole 303b, so that the heat management liquid is difficult to flow to the second row of battery monomers 21 through the second liquid outlet hole 303b, can be improved. By such arrangement, the heat management liquid can quickly enter the first sub-flow passage 201 and the second sub-flow passage 201, and quickly flow to the battery monomer assembly 20 through the first liquid outlet hole 303a and the second liquid outlet hole 303b, thereby facilitating the effect that the efficiency of heat exchange between the heat management liquid and the battery monomer 21 gradually increases in the first direction X, thereby further improving the uniformity of the battery device 100.

[0186] In other optional embodiments, in the third direction Z, the first sub-passage 3011a can also be located on the side of the second sub-passage 3011b close to the bottom wall 111.

[0187] In some embodiments, please refer to Figure 5 and Figure 6 together with other drawings. The plurality of liquid outlet holes 303 further includes a third liquid outlet hole 303c, and the third liquid outlet hole 303c is communicated with the first sub-passage 3011a. In the same side of the sub-flow structure 30 along the second direction Y, the at least one second liquid outlet hole 303b and the third liquid outlet hole 303c are distributed along the first direction X.

[0188] It can be understood that the at least one liquid outlet hole 303 is the third liquid outlet hole 303c.

[0189] By adopting the technical scheme, the heat management liquid in the first sub-flow passage 201 can flow to the battery monomer 21 corresponding to the second liquid outlet hole 303b through the third liquid outlet hole 303c, which helps to increase the flow of the heat management liquid on the battery monomer 21 corresponding to the second liquid outlet hole 303b, thereby helping to improve the heat exchange efficiency between the battery monomer 21 corresponding to the second liquid outlet hole 303b and the heat management liquid. That is, the arrangement of the third liquid outlet hole 303c can supplement the heat management liquid in the first sub-passage 3011a to the second row of battery monomers 21, so as to improve the heat exchange efficiency between the second row of battery monomers 21 and the heat management liquid, thereby helping to improve the uniformity of the battery device 100.

[0190] In some embodiments, please refer to Figure 5 and Figure 6, and in conjunction with other drawings. The third liquid outlet hole 303c has a larger hole diameter than the second liquid outlet hole 303b.

[0191] The hole diameter of the third liquid outlet hole 303c is the area of the cross section of the third liquid outlet hole 303c perpendicular to the second direction Y.

[0192] By having the third liquid outlet hole 303c with a larger hole diameter than the second liquid outlet hole 303b, the third liquid outlet hole 303c has a larger hole diameter, which is conducive to the thermal management liquid in the first sub-channel 3011a to supplement to the battery monomer 21 corresponding to the second liquid outlet hole 303b, so as to improve the heat exchange efficiency between the battery monomer 21 corresponding to the second liquid outlet hole 303b and the thermal management liquid, thereby helping to further improve the uniformity of the battery device 100.

[0193] In some embodiments, please refer to Figure 5 and Figure 6 , and in conjunction with other drawings. In the same side of the distribution structure 30 along the second direction Y, all the second liquid outlet holes 303b are distributed along the first direction X with the third liquid outlet hole 303c.

[0194] It can be understood that the third liquid outlet hole 303c is close to the side wall of the box body 10 away from the liquid inlet hole 302 along the first direction X.

[0195] In this way, the problem that the flow of the thermal management liquid is small due to the hindering effect of the side wall of the box body 10 away from the liquid inlet hole 302 along the first direction X can be improved, thereby helping to further improve the flow of the thermal management liquid on the rear row of battery monomers 21, so as to improve the heat exchange efficiency between the rear row of battery monomers 21 and the thermal management liquid, thereby helping to improve the uniformity of the battery device 100.

[0196] In some embodiments, please refer to Figure 5 , and in conjunction with other drawings. The liquid inlet hole 302 is arranged at one end of the distribution structure 30 along the first direction X, and the sub-channel 3011 is communicated with the liquid inlet hole 302.

[0197] By arranging the liquid inlet hole 302 at one end of the distribution structure 30 along the first direction X, the thermal management liquid flowing into the sub-channel 3011 from the liquid inlet hole 302 can be facilitated.

[0198] In some embodiments, in the same projection plane perpendicular to the first direction X, the orthographic projection of the liquid inlet hole 302 covers the orthographic projection of all the liquid outlet holes 303 on the corresponding sub-channel 3011.

[0199] In some possible designs, in the same projection plane perpendicular to the first direction X, the orthographic projection of the first liquid inlet hole 302a covers the orthographic projection of all the first liquid outlet holes 303a.

[0200] In some possible design, the second liquid inlet hole 302b covers all the second liquid outlet holes 303b in the same projection plane perpendicular to the first direction X.

[0201] In this way, the thermal management liquid entering the sub-channel 3011 through the liquid inlet hole 302 can quickly flow to all the liquid outlet holes 303, so that the heat exchange efficiency between the thermal management liquid and the battery cell 21 can be improved.

[0202] In some embodiments, reference can be made to Figure 4 and Figure 9 together with other drawings. Among them, Figure 9 is a schematic view of two battery cells 21 of a battery device 100 provided in some embodiments of the present application. Two second partitions 22 are arranged between two battery cells 21 adjacent in the first direction X, and the two second partitions 22 are spaced apart along the third direction Z to form a flow channel 201. In the same projection plane perpendicular to the first direction X, the projection of the liquid outlet hole 303 is arranged opposite to the projection of the flow channel 201 along the second direction Y.

[0203] The two second partitions 22 and the two battery cells 21 surround to form the flow channel 201, which is arranged through along the second direction Y.

[0204] By adopting the above technical solution, the thermal management liquid can flow to the battery cell 21 along the second direction Y through the liquid outlet hole 303, which is beneficial to the flow of the thermal management liquid into the flow channel 201, so as to effectively perform the thermal management operation on the battery cell 21.

[0205] In addition, the flow channel 201 is formed by the two second partitions 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 part of the battery cell 21, thereby helping to improve the reliability of the battery device 100.

[0206] In some possible design, the second partition 22 can be a buffer structure, for example, can be a rubber pad, a silica gel pad, etc.

[0207] In this way, the second partition 22 can provide resistance to the expansion of the battery cell 21.

[0208] In some embodiments, at least one first liquid outlet hole 303a is arranged opposite to the battery cell 21 along the second direction Y, and at least one second liquid outlet hole 303b is arranged opposite to the flow channel 201 along the second direction Y.

[0209] By adopting the above technical solution, after the heat management liquid flows out through the at least one first liquid outlet hole 303a, the heat management liquid can first flow to the surface of the battery monomer 21 along the second direction Y, and then flow to the flow channel 201 along the surface of the battery monomer 21. After the heat management liquid flows out through the at least one second liquid outlet hole 303b, the heat management liquid can directly flow to the flow channel 201.

[0210] In this way, the flow resistance on the battery monomer 21 corresponding to the second liquid outlet hole 303b can be less than the flow resistance on the battery monomer 21 corresponding to the first liquid outlet hole 303a, so that the flow rate flowing to the battery monomer 21 corresponding to the second liquid outlet hole 303b can be greater than the flow rate flowing to the battery monomer 21 corresponding to the first liquid outlet hole 303a, that is, the flow rate flowing to the rear row of battery monomers 21 is greater than the flow rate flowing to the front row of battery monomers 21, so as to improve the heat exchange efficiency of the rear row of battery monomers 21 and the heat management liquid. By such arrangement, the temperature difference of the battery device 100 can be further reduced, and the uniformity of the battery device 100 can be improved.

[0211] In some embodiments, please refer to Figures 3 to 8 、 Figure 10 and Figure 11 , and in combination with other drawings. Among them, Figure 10 is Figure 6 a sectional view along C-C, Figure 11 is Figure 10 an enlarged view at D in FIG. 3. The battery monomer assembly 20 is arranged on both sides of the flow distribution structure 30 along the second direction Y. The flow distribution structure 30 is provided with two channels 301, and the two channels 301 are distributed along the second direction Y. The flow distribution structure 30 is provided with liquid outlet holes 303 on the two opposite side walls along the second direction Y. In the second direction Y, the liquid outlet holes 303 on both sides of the flow distribution structure 30 are respectively communicated with the two channels 301.

[0212] It can be understood that the flow distribution structure 30 can include a main body 31 and the first partition 32 described above, and the first partition 32 is arranged in the main body 31 to divide the internal space of the flow distribution structure 30 into two channels 301 distributed along the second direction Y, and each channel 301 is divided into a plurality of flow channels 201 distributed along the third direction Z.

[0213] Among them, the side wall of each channel 301 is provided with a liquid inlet hole 302.

[0214] By adopting the technical scheme, the heat management liquid can flow into the two channels 301 respectively, and flow onto the battery monomer assemblies 20 on each side of the shunt structure 30 along the second direction Y through the liquid outlet holes 303 in each channel 301, so as to respectively achieve heat management of the battery monomer assemblies 20 on both sides of the shunt structure 30 along the second direction Y. That is, the battery monomer assemblies 20 on both sides of the shunt structure 30 along the second direction Y can be separately heat managed through the corresponding channels 301. In this way, by adjusting the number, size and specific layout of the liquid outlet holes 303 on each channel 301, the flow of the heat management liquid on each battery monomer assembly 20 can be individually achieved, thereby facilitating improvement of the uniformity of the battery device 100.

[0215] In some embodiments, please refer to Figure 3 , and in combination with other drawings. The inner wall of the box body 10 is provided with a plurality of liquid outlet holes 101, and at least part of the liquid outlet holes 101 are arranged at intervals along the first direction X. In the first direction X, the aperture of at least part of the liquid outlet holes 101 arranged at intervals along the first direction X gradually increases.

[0216] The liquid outlet hole 101 refers to an opening of the box body 10 for the heat management liquid in the box body 10 to flow out of the box body 10.

[0217] The "at least part of the liquid outlet holes 101 arranged at intervals along the first direction X" includes a plurality of liquid outlet holes 101.

[0218] Among them, in some possible designs, all the liquid outlet holes 101 are arranged at intervals along the first direction X. Or, in another possible design, part of the liquid outlet holes 101 are arranged at intervals along the first direction X.

[0219] By arranging at least part of the liquid outlet holes 101 at intervals along the first direction X, the heat management liquid at each place of the battery monomer assemblies 20 along the first direction X can flow out through the corresponding liquid outlet holes 101, which helps to improve the flow of the heat management liquid at each place of the battery monomer assemblies 20 along the first direction X, so as to improve the heat management efficiency of the battery monomer assemblies 20.

[0220] In the first direction X, the aperture of at least part of the liquid outlet holes 101 arranged at intervals along the first direction X gradually increases, that is, among at least part of the liquid outlet holes 101 arranged at intervals along the first direction X, the aperture of the liquid outlet hole 101 closer to the rear row of battery monomers 21 is greater than the aperture of the liquid outlet hole 101 closer to the front row of battery monomers 21 in the first direction X.

[0221] Among them, the aperture of the liquid outlet hole 101 can be the area of the cross section of the liquid outlet hole 101.

[0222] In some possible design, in the first direction X, the aperture of all the liquid outlets 101 arranged at intervals in the first direction X gradually increases. Alternatively, in some other possible design, in the first direction X, the aperture of part of the liquid outlets 101 arranged at intervals in the first direction X gradually increases.

[0223] By adopting the technical solutions described above, the aperture of the liquid outlet 101 close to the rear row of battery monomers 21 is greater than the aperture of the liquid outlet 101 close to the front row of battery monomers 21 in the first direction X, which helps to make the flow of the thermal management liquid close to the rear row of battery monomers 21 greater than the flow of the thermal management liquid close to the front row of battery monomers 21, thereby helping to further improve the efficiency of heat exchange between the rear row of battery monomers 21 and the battery monomers 21, and thus helping to further reduce the temperature difference of the battery device 100 and improve the uniformity of the battery device 100.

[0224] Please refer to Figure 1 , and in combination with other drawings. The power consumption device provided by the embodiments of the present application includes the battery monomer 21 or the battery device 100. In the embodiments, the battery device 100 is the same as the battery device 100 in the above embodiments, and details are described in the related description of the battery device 100 in the above embodiments, which will not be repeated here.

[0225] The power consumption device provided by the embodiments of the present application can improve the uniformity of the battery device 100, improve the reliability of the battery device 100, and improve the reliability of the power consumption device by adopting the battery device 100 described above.

[0226] The energy storage device provided by the embodiments of the present application includes the battery device 100. In the embodiments, the battery device 100 is the same as the battery device 100 in the above embodiments, and details are described in the related description of the battery device 100 in the above embodiments, which will not be repeated here.

[0227] The energy storage device provided by the embodiments of the present application can improve the uniformity of the battery device 100, improve the reliability of the battery device 100, and improve the reliability of the energy storage device by adopting the battery device 100 described above.

[0228] The energy storage system provided by the embodiments of the present application includes the energy storage device. In the embodiments, the energy storage device is the same as the energy storage device in the above embodiments, and details are described in the related description of the energy storage device in the above embodiments, which will not be repeated here.

[0229] The energy storage system provided by the embodiments of the present application can improve the uniformity of the battery device 100, improve the reliability of the battery device 100, and improve the reliability of the energy storage system by adopting the energy storage device described in the above embodiments.

[0230] The charging network provided by the embodiments of the present application comprises a charging pile, and further comprises an energy storage device or an energy storage system, the energy storage device being configured to provide electric energy for the charging pile. The energy storage device and the energy storage system in the embodiments of the present application are the same as those in the above embodiments, and the related descriptions of the energy storage device and the energy storage system in the above embodiments are referred to for details, which will not be described herein.

[0231] The charging network provided by the embodiments of the present application can improve the uniformity of the battery device 100, improve the reliability of the battery device 100, and improve the reliability of the charging network by using the energy storage device or the energy storage system involved in the above embodiments.

[0232] As one of the embodiments of the present application, as shown in Figures 3 to 11As shown, the battery device 100 comprises a box body 10, a battery cell assembly 20 and a shunt structure 30. At least part of the battery cell assembly 20 is arranged in the box body 10, and the battery cell assembly 20 comprises a plurality of rows of battery cells 21 arranged along a first direction X, and each row of battery cells 21 is arranged along a second direction Y. The box body 10 comprises a bottom wall 111, and the battery cell assembly 20 is supported on the bottom wall 111 along a third direction Z. At least part of the shunt structure 30 is arranged in the box body 10, and the shunt structure 30 has the battery cell assembly 20 on both sides along the second direction Y. The shunt structure 30 is provided with two channels 301 distributed along the second direction Y, and the shunt structure 30 is provided with a plurality of liquid inlet holes 302, a plurality of liquid outlet holes 303 on both sides of the shunt structure 30 along the second direction Y, the liquid inlet holes 302 and the liquid outlet holes 303 are distributed along the first direction X, the first direction X is the flow direction of the liquid in the channel 301, the side wall of each channel 301 is provided with a liquid inlet hole 302 communicating with the channel 301, and the two channels 301 are respectively communicated with the liquid outlet holes 303 on both sides of the shunt structure 30. The shunt structure 30 is provided with a first partition 32, and the first partition 32 divides the channel 301 into two sub-channels 3011 arranged along the third direction Z, and the two sub-channels 3011 of the channel 301 are respectively a first sub-channel 3011a and a second sub-channel 3011b. The plurality of liquid inlet holes 302 comprises 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, 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 communicated with the first sub-channel 3011a, and the second liquid inlet hole 302b is communicated with the second sub-channel 3011b. In the same side of the shunt structure 30 along the second direction Y, the plurality of liquid outlet holes 303 comprises a third liquid outlet hole 303c, a plurality of first liquid outlet holes 303a and a plurality of second liquid outlet holes 303b, the plurality of first liquid outlet holes 303a are arranged along the first direction X, the plurality of second liquid outlet holes 303b are arranged along the first direction X, the first liquid outlet hole 303a and the third liquid outlet hole 303c are communicated with the first sub-channel 3011a, the second liquid outlet hole 303b is communicated with the second sub-channel 3011b, and the first liquid outlet hole 303a, the second liquid outlet hole 303b and the third liquid outlet hole 303c are sequentially and spacedly distributed along the first direction X. In the same side of the shunt structure 30 along the second direction Y, the aperture of at least part of the first liquid outlet hole 303a gradually increases along the first direction X, and the aperture of at least part of the second liquid outlet hole 303b gradually increases along the first direction X, the aperture of the second liquid outlet hole 303b is larger than that of the first liquid outlet hole 303a, and the aperture of the third liquid outlet hole 303c is larger than that of the second liquid outlet hole 303b. In the same side of the shunt structure 30 along the second direction Y, along the third direction Z, the first sub-channel 3011a is arranged on the side away from the bottom wall 111 of the second sub-channel 3011b.In the same side of the flow distribution structure 30 along the second direction Y, the distance between at least part of the first liquid outlet hole 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 hole 303b and the bottom wall 111 gradually decreases along the first direction X.

[0233] The above only is the preferred embodiment of the present application, and does not use to limit the present application, any modification, equivalent replacement and improvement etc. made within the spirit and principle of the present application, should be included in the protection scope of the present application.

Claims

1. A battery device, characterized by, The application relates to a battery pack, comprising: a box body; a battery cell assembly arranged at least partially in the box body, the battery cell assembly comprising a plurality of rows of battery cells arranged along a first direction, each row of battery cells being arranged along a second direction; a flow distribution structure arranged at least partially in the box body, the flow distribution structure being provided with the battery cell assembly on at least one side thereof along the second direction, the flow distribution structure being provided with a channel and a liquid inlet hole connected to the channel, the flow distribution structure being provided with a plurality of liquid outlet holes connected to the channel on a side wall thereof facing the battery cell assembly along the second direction, the liquid inlet hole and the liquid outlet holes being distributed along the first direction, the first direction being a flow direction of liquid in the channel; wherein, on the same side of the flow distribution structure along the second direction, at least some of the liquid outlet holes are arranged at intervals along the first direction, and, along the first direction, the aperture of at least some of the liquid outlet holes arranged at intervals along the first direction gradually increases. The box body comprises a bottom wall, and the battery cell assembly is supported on the bottom wall along a third direction. The channel is provided with a first partition, and the first partition divides the channel into a plurality of sub-channels distributed along the third direction, the plurality of sub-channels comprising a first sub-channel and a second sub-channel distributed along the third direction. On the same side of the flow distribution structure along the second direction, the plurality of liquid outlet holes comprise first liquid outlet holes and second liquid outlet holes, the first liquid outlet holes being connected to the first sub-channel, and the second liquid outlet holes being connected to the second sub-channel, the second liquid outlet holes being located behind the first liquid outlet holes 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, characterized by On the same side of the flow distribution structure along the second direction, along the first direction, the distance between at least some of the liquid outlet holes arranged at intervals along the first direction and the bottom wall gradually decreases.

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

4. The battery device of claim 1, wherein On the same side of the flow distribution structure along the second direction, the sub-channel is connected to a plurality of liquid outlet holes, among the plurality of liquid outlet holes connected to the sub-channel, at least some of the liquid outlet holes are arranged at intervals along the first direction, and, along the first direction, the aperture of at least some of the liquid outlet holes arranged at intervals along the first direction gradually increases.

5. The battery device of claim 1, wherein On the same side of the flow distribution structure along the second direction, the sub-channel is connected to a plurality of liquid outlet holes, among the plurality of liquid outlet holes connected to the sub-channel, at least some of the liquid outlet holes are arranged at intervals along the first direction, and, along the first direction, the distance between at least some of the liquid outlet holes arranged at intervals along the first direction and the bottom wall gradually decreases.

6. The battery device of 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 of claim 6, wherein The plurality of liquid outlet holes further comprises a third liquid outlet hole, which is in communication with the first sub-channel; in the same side of the shunt structure along the second direction, at least one second liquid outlet hole and the third liquid outlet hole are distributed along the first direction.

8. The battery device of claim 7, wherein, The third liquid outlet hole has a larger aperture than the second liquid outlet hole.

9. The battery device of claim 7, wherein, In the same side of the shunt structure along the second direction, all the second liquid outlet holes are distributed along the first direction with the third liquid outlet hole.

10. The battery device of claim 1, wherein, The liquid inlet hole is arranged at one end of the shunt structure along the first direction, and the sub-channel is in communication with the liquid inlet hole; In the same projection plane perpendicular to the first direction, the orthographic projection of the liquid inlet hole covers the orthographic projection of all the liquid outlet holes on the corresponding sub-channel.

11. The battery device of claim 1, wherein Two second separators are arranged between two adjacent battery monomers along the first direction, and the two second separators are spaced apart along the third direction to form a flow channel; In the same projection plane perpendicular to the first direction, the orthographic projection of the liquid outlet hole is arranged opposite to the orthographic projection of the flow channel along the second direction.

12. The battery device of claim 11, wherein, At least one first liquid outlet hole is arranged opposite to the battery monomer along the second direction, and at least one second liquid outlet hole is arranged opposite to the flow channel along the second direction.

13. The battery device according to any one of claims 1 to 12, characterized by, The battery monomer assembly is arranged on both sides of the shunt structure along the second direction; The shunt structure is provided with two channels arranged along the second direction; The shunt structure is provided with the liquid outlet hole on both sides along the second direction; In the second direction, the liquid outlet holes on both sides of the shunt structure are in communication with the two channels respectively.

14. The battery device according to any one of claims 1 to 12, wherein The inner wall of the box body is provided with a plurality of liquid outlet holes, and at least part of the liquid outlet holes are arranged along the first direction at intervals; In the first direction, the aperture of at least part of the liquid outlet holes among the plurality of liquid outlet holes arranged along the first direction at intervals gradually increases.

15. An electrical device, comprising: The battery device according to any one of claims 1-14.

16. An energy storage device, characterized by The battery device according to any one of claims 1-14.

17. An energy storage system characterized by, The energy storage device according to claim 16.

18. A charging network characterized in that, The charging pile, and the energy storage device according to claim 16 or the energy storage system according to claim 17, wherein the energy storage device is used to provide electric energy for the charging pile.

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