Battery device, power utilization device and energy storage device

Abstract

The utility model provides a battery device, a power utilization device and an energy storage device, and the battery device comprises a box body which comprises a first wall, and the first wall is provided with an opening; the battery monomers are arranged in the box body; the electric control assembly comprises a circuit board and a circuit board shell, the circuit board shell is connected with the first wall through a fastener, the opening is sealed by the circuit board shell, and the circuit board is arranged in the circuit board shell and electrically connected with the battery monomers; the sealing element is arranged between the circuit board shell and the first wall and surrounds the opening; wherein the outer surface of the first wall is provided with a plurality of blind holes, the plurality of blind holes are distributed along the circumferential direction of the opening, the circuit board shell is provided with a plurality of through holes corresponding to the plurality of blind holes, and the fasteners penetrate through the through holes and are connected with the corresponding blind holes. The reliability of the battery device can be improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery device, an electrical device, and an energy storage device. Background Technology

[0002] With the rapid development of new energy technologies, battery devices have been widely used in electronic devices, electric vehicles, electric two-wheelers, power tools, and other fields. As the application of battery devices becomes more widespread, higher requirements are being placed on their reliability. Utility Model Content

[0003] This application provides a battery device, an electrical device, and an energy storage device that can improve reliability.

[0004] In a first aspect, embodiments of this application provide a battery device, comprising: a housing including a first wall having an opening; a battery cell disposed within the housing; an electronic control assembly including a circuit board and a circuit board housing, the circuit board housing being connected to the first wall via fasteners, the circuit board housing closing the opening, the circuit board being disposed within the circuit board housing and electrically connected to the battery cell; and a sealing member disposed between the circuit board housing and the first wall, and surrounding the opening; wherein, the outer surface of the first wall has a plurality of blind holes distributed circumferentially along the opening, the circuit board housing has a plurality of through holes corresponding to the plurality of blind holes, and the fasteners passing through the through holes and connected to the corresponding blind holes.

[0005] Multiple blind holes are provided on the outer surface of the first wall of the enclosure, and multiple through holes corresponding to the blind holes are provided on the circuit board housing. Fasteners are inserted through the through holes and connected to the corresponding blind holes to install the circuit board housing onto the first wall. Thus, there is only one sealing interface between the circuit board housing and the first wall. The seal seals the opening on the first wall, which greatly reduces the sealing difficulty, improves the sealing reliability, simplifies the structure of the seal, and reduces the cost.

[0006] In some embodiments, the inner surface of the first wall is formed with a plurality of protrusions, the plurality of protrusions corresponding to a plurality of blind holes, one end of the blind hole extending into the corresponding protrusion.

[0007] The inner surface of the first wall forms multiple protrusions corresponding to multiple blind holes. The protrusions are formed at the locations where blind holes need to be set on the first wall, which can strengthen the strength of the blind hole locations on the first wall, thereby improving the connection strength between the fastener and the blind hole. Other locations on the first wall can be appropriately thinned to reduce weight.

[0008] In some embodiments, the circuit board housing includes a housing body and a flange portion. The flange portion is disposed on the outer peripheral side of the housing body, the through hole is disposed on the flange portion, and the seal is disposed between the flange portion and the first wall. A reinforcing rib is formed on the inner surface of the first wall, and in the same projection plane perpendicular to the thickness direction of the first wall, the orthographic projection of the reinforcing rib at least partially overlaps with the orthographic projection of the flange portion.

[0009] By having the reinforcing ribs overlap at least partially with the flange, the strength of the first wall at the flange location can be enhanced, thereby improving the reliability of the connection between the circuit board housing and the first wall. This also eliminates the need for the previous liner, reducing manufacturing costs and improving assembly efficiency.

[0010] In some embodiments, the reinforcing ribs are arranged around the perimeter of the opening.

[0011] Since the strength of the first wall is relatively weak near the opening, especially in the current pursuit of ultra-thin and lightweight enclosures, the opening is more likely to cause insufficient strength of the first wall. By setting reinforcing ribs around the opening, the strength of the first wall can be compensated, and the reliability of the connection between the circuit board shell and the first wall can be improved.

[0012] In some embodiments, two adjacent protrusions are connected by the reinforcing ribs.

[0013] The two adjacent protrusions are connected by reinforcing ribs, which can strengthen the protrusions and thus improve the reliability of the connection between the circuit board shell and the first wall.

[0014] In some embodiments, a plurality of the fasteners are disposed on the outer peripheral side of the seal.

[0015] Multiple fasteners are set on the outer periphery of the seal, eliminating the need for holes in the seal for the fasteners to pass through, simplifying the seal forming process, improving production efficiency, and reducing costs.

[0016] In some embodiments, the blind hole is provided with an insert that mates with the fastener.

[0017] By incorporating inserts that engage with fasteners within blind holes, the connection between the circuit board housing and the first wall becomes more secure, improving connection reliability and reducing the risk of seal failure.

[0018] In some embodiments, the enclosure includes a body and a cover, the cover being disposed on the body to form a closed space for accommodating the battery cell, and the first wall being a side wall of the cover.

[0019] The first wall is the side wall of the cover, and the electronic control assembly is fixed to the side wall. When the battery cell is placed "upright" in the housing, the connector interface of the electronic control assembly is closer to the electrode terminals of the battery cell, which facilitates the installation of wires. In some embodiments, the cover is an injection molded part.

[0020] The cover is an injection molded part, which can be quickly molded, improving production efficiency and also helps to reduce the weight of the cover, making the battery device lighter.

[0021] Secondly, embodiments of this application provide an electrical device, including the battery device as described in any of the above embodiments.

[0022] Since the sealing interface between the circuit board housing and the first wall of the casing is reduced in the battery device of this application embodiment, the sealing reliability is improved. As a result, the reliability of the power device including the battery device of this application embodiment is also improved.

[0023] Thirdly, embodiments of this application provide an energy storage device, including the battery device as described in any of the above embodiments.

[0024] Since the sealing interface between the circuit board housing and the first wall of the casing is reduced in the battery device of this application embodiment, the sealing reliability is improved. As a result, the reliability of the energy storage device including the battery device of this application embodiment is also improved. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation on the scope.

[0026] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0027] Figure 2 This is an exploded view of the housing provided in some embodiments of this application;

[0028] Figure 3 This is an exploded view of a battery cell provided in some embodiments of this application;

[0029] Figure 4 Side view of the housing provided for some embodiments of this application;

[0030] Figure 5 for Figure 4 Sectional view at position AA;

[0031] Figure 6 for Figure 5 Enlarged diagram of position B in the middle;

[0032] Figure 7 This is a schematic diagram of the internal structure of the electronic control component provided in some embodiments of this application;

[0033] Figure 8 A schematic diagram of the outer surface portion of the first wall provided for some embodiments of this application, wherein blind holes are shown on the outer surface of the first wall;

[0034] Figure 9 A schematic diagram of the outer surface portion of the first wall provided for some embodiments of this application, showing an insert in a blind hole on the outer surface of the first wall;

[0035] Figure 10 A schematic diagram of the inner side surface of the first wall provided for some embodiments of this application;

[0036] Figure 11 This is a schematic diagram of the structure of the seal provided in some embodiments of this application;

[0037] Figure 12 This is a schematic diagram of the structure of an energy storage device provided in some embodiments of this application.

[0038] icon:

[0039] 1000 - Vehicle; 100 - Battery unit; 200 - Controller; 300 - Motor;

[0040] 2000 - Energy storage device; 2010 - Energy storage cabinet; 2011 - Door;

[0041] 10-Box body; 11-Box body; 12-Lid; 13-First wall; 13a-Outer surface; 13b-Inner surface; 14-Reinforcing rib; 121-Side wall; 131-Opening; 132-Blind hole; 133-Protrusion; 134-Insert; 141-First reinforcing rib; 142-Second reinforcing rib; 143-Third reinforcing rib;

[0042] 20-Battery cell; 21-Battery cell casing; 22-Electrode assembly; 23-Electrode terminal; 211-Housing shell; 212-End cap; 221-Main body; 222-Taper;

[0043] 30 - Electrical control components; 31 - Circuit board; 32 - Circuit board housing; 311 - Connector; 321 - Through hole; 322 - Housing body; 323 - Flange;

[0044] 40-Fasteners;

[0045] 50 - Seals;

[0046] 60 - Wire. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in this application are used to distinguish different objects, rather than to describe a specific order or hierarchy.

[0049] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0052] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0053] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0054] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0055] A battery cell may include a battery cell casing. The battery cell casing is used to encapsulate components such as electrode assemblies and electrolytes. The battery cell casing can be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0056] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include, but are not limited to, square battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0057] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0058] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly may be a battery module, which is formed by arranging multiple battery cells and fixing them together to form an independent module.

[0059] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0060] As an example, a battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0061] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0062] As an example, the enclosure may include a body and a cover. The body and cover are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing; it can be sealed or not sealed.

[0063] As an example, the enclosure may include a cover, a frame, and a base plate. The cover and base plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0064] As an example, the box body can be part of the vehicle's chassis structure. For instance, the box body's cover can be at least part of the vehicle's floor, or the box body's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0065] In some embodiments, the energy storage device includes an energy storage cabinet and a battery unit, with a door on at least one side of the energy storage cabinet. The energy storage device includes energy storage containers, energy storage cabinets, etc.

[0066] Battery devices possess outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide applicability, and low self-discharge coefficient, making them an important component of today's new energy development. The development of battery technology must consider multiple factors simultaneously, such as performance parameters like energy density, cycle life, discharge capacity, and charge / discharge rate. Furthermore, the reliability and assembly efficiency of the battery device must also be taken into account.

[0067] With the rapid development of new energy technologies, higher demands are being placed on the reliability and assembly efficiency of battery devices. A battery device includes a circuit board, which is typically housed in a casing. This casing provides protection for the circuit board, such as resistance to impact, corrosion, and short circuits. Taking a Cell Supervision Circuit (CSC) as an example, the CSC collects status information from individual battery cells and transmits it to the Battery Management Unit (BMU) to ensure stable and efficient operation of the battery device. To improve space utilization within the battery pack, the CSC is usually installed on the outside of the pack. The CSC consists of a circuit board and a casing that houses it. The circuit board is electrically connected to the individual battery cells via wires passing through an opening in the pack. The casing closes the opening and is secured to the pack by multiple bolts around the opening. To enhance the strength of the mounting area, a lining plate surrounds the opening on the inner wall of the pack. The bolts pass through the lining plate, the pack, and the casing, and nuts secure the casing to the pack. Therefore, in order to improve sealing performance, the sealing interfaces between the rivet bolts and the liner, between the liner and the housing, and between the housing and the circuit board shell all need to be sealed. If any sealing interface is not sealed properly, it will lead to sealing failure. The sealing is difficult and unreliable. In addition, the need to seal multiple sealing interfaces leads to a complex structure of the sealing components and high cost. Furthermore, the addition of the liner reduces assembly efficiency.

[0068] In response, this application provides a battery device comprising: a housing including a first wall having an opening; a battery cell disposed within the housing; an electronic control assembly including a circuit board and a circuit board housing, the circuit board housing being connected to the first wall via fasteners, the circuit board housing closing the opening, the circuit board being disposed within the circuit board housing and electrically connected to the battery cell; and a sealing element disposed between the circuit board housing and the first wall, surrounding the opening; wherein the outer surface of the first wall has a plurality of blind holes distributed circumferentially along the opening, the circuit board housing has a plurality of through holes corresponding to the plurality of blind holes, and fasteners passing through the through holes and connected to the corresponding blind holes.

[0069] Multiple blind holes are provided on the outer surface of the first wall of the enclosure, and multiple through holes corresponding to the blind holes are provided on the circuit board housing. Fasteners are inserted through the through holes and connected to the corresponding blind holes to install the circuit board housing on the first wall. There is only one sealing interface between the circuit board housing and the first wall, which greatly reduces the sealing difficulty, improves the sealing reliability, simplifies the structure of the sealing component, and reduces costs.

[0070] The battery device disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be constructed using the battery device disclosed in this application to improve the reliability of the battery device.

[0071] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0072] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0073] Reference Figure 1 Vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside vehicle 1000. The battery device 100 can be located at the bottom, front, or rear of vehicle 1000. The battery device 100 can be used to power vehicle 1000; for example, it can serve as the vehicle's operating power source or general power source. Vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 controls the battery device 100 to supply power to the motor 300, for example, to meet the power needs of vehicle 1000 during starting, navigation, and driving.

[0074] In some embodiments of this application, the battery device 100 can not only serve as the operating power or power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0075] Please refer to Figure 2 and Figure 3 The housing 10 provides assembly space for the battery cell 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a housing body 11 and a cover 12, which cover each other, and together define an assembly space for accommodating the battery cell 20. The housing body 11 may be a plate-like structure, and the cover 12 may be a hollow structure open at one end, with the cover 12 covering the open side of the housing body 11. Alternatively, both the housing body 11 and the cover 12 may be hollow structures open on one side, with the open side of the housing body 11 covering the open side of the cover 12.

[0076] Of course, the box 10 formed by the box body 11 and the cover 12 can be of various shapes, such as a cylinder, a cuboid, or a cube. For example, in... Figure 2In the middle, the shape of box 10 is a cuboid.

[0077] In the battery device 100, a plurality of battery cells 20 are arranged inside the housing 10. The plurality of battery cells 20 can be connected in series, in parallel, or in a mixed manner. A mixed connection means that the plurality of battery cells 20 are connected in both series and parallel. The plurality of battery cells 20 can be directly connected in series, in parallel, or in a mixed manner together, and then the whole assembly of the plurality of battery cells 20 is housed in the housing 10. Of course, the battery device 100 can also be in the form of a battery module in which the plurality of battery cells 20 are first connected in series, in parallel, or in a mixed manner to form a battery module, and then the plurality of battery modules are connected in series, in parallel, or in a mixed manner to form a whole assembly, which is housed in the housing 10.

[0078] In some embodiments, the battery device 100 may also include other structures. For example, the battery device 100 may also include a busbar for connecting multiple battery cells 20 to achieve electrical connection between the multiple battery cells 20.

[0079] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be in the form of a cuboid, cylinder, prism, or other shapes. For example, in... Figure 3 In the middle, the battery cell 20 has a cuboid structure.

[0080] As an example, refer to Figure 3 The battery cell 20 includes a battery cell housing 21 and an electrode assembly 22 disposed within the battery cell housing 21.

[0081] The battery cell casing 21 can also be used to contain the electrolyte, such as electrolyte solution. The battery cell casing 21 can have various structural forms, such as a cylinder or a cuboid. Similarly, the battery cell casing 21 can be made of various materials, such as copper, iron, aluminum, steel, or aluminum alloy.

[0082] Optionally, the battery cell housing 21 may include a housing 211 and an end cap 212. The housing 211 has an internal cavity for accommodating the electrode assembly 22 and has an opening. That is, the housing 211 is a hollow structure with an opening at one end. The end cap 212 covers the opening of the housing 211 and forms a sealed connection to form a sealed space for accommodating the electrode assembly 22 and the electrolyte.

[0083] The housing 211 can have various shapes, such as a cylinder, cuboid, or prism. The shape of the housing 211 can be determined based on the specific shape of the electrode assembly 22. For example, if the electrode assembly 22 is a cylinder, a cylindrical housing 211 can be used; if the electrode assembly 22 is a cuboid, a cuboid housing 211 can be used. Of course, the end cap 212 can also have various structures, such as a plate-like structure or a hollow structure open at one end. For example, in… Figure 3 In the middle, the shell 211 has a cuboid structure.

[0084] Of course, it is understandable that the battery cell housing 21 is not limited to the structure described above. The battery cell housing 21 can also be other structures. For example, the battery cell housing 21 can include a housing 211 and two end caps 212. The housing 211 is a hollow structure with openings on both opposite sides. One end cap 212 is fitted onto one opening of the housing 211 to form a sealed connection, thereby forming a sealed space for accommodating the electrode assembly 22 and the electrolyte. In other words, the housing 211 has openings on both opposite sides, and the two end caps 212 are fitted onto both sides of the housing 211 to close the corresponding openings.

[0085] It should be noted that the electrode assembly 22 is the component in the battery cell 20 where the electrochemical reaction occurs. The structure of the electrode assembly 22 can be various. For example, the electrode assembly 22 can be a wound structure formed by winding the positive electrode, the separator and the negative electrode, or a stacked structure formed by arranging the positive electrode, the separator and the negative electrode in layers.

[0086] For example, the separator is a separator membrane, and the main material of the separator membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene and polyvinylidene fluoride.

[0087] The electrode assembly 22 includes a main body 221 and tabs 222. The main body 221 is the main component of the electrode assembly 22 that undergoes electrochemical reactions within the battery cell 20. For example, in... Figure 3 In this configuration, tab 222 is connected to one end of the main body 221 near the end cap 212, so that tab 222 can be connected to electrode terminal 23. Tab 222 can be directly connected to electrode terminal 23, or it can be connected through an adapter.

[0088] Optionally, the electrode assembly 22 housed within the battery cell housing 21 can be one or more. For example, in... Figure 3In the battery cell 20, the battery cell housing 21 is provided with multiple electrode assemblies 22, which are stacked. When multiple electrode assemblies 22 are provided inside the battery cell housing 21 of the battery cell 20, the number of electrode assemblies 22 can be two, three, four, five, or six, etc.

[0089] The electrode terminal 23 serves to electrically connect to the electrode assembly 22, acting as the output or input terminal of the battery cell 20, thereby enabling the output or input of electrical energy from the battery cell 20.

[0090] For example, the electrode terminal 23 can be made of various materials, such as copper, iron, aluminum, steel or aluminum alloy.

[0091] Among them, Figure 3 In the battery cell 20, there are two electrode terminals 23. Correspondingly, each electrode assembly 22 has two tabs 222 with opposite polarities. That is, the two tabs 222 are the positive and negative terminals of the input or output electrode assembly 22, respectively. The two electrode terminals 23 are electrically connected to the two tabs 222 of the electrode assembly 22, respectively, so as to realize the input or output of the positive and negative terminals of the battery cell 20.

[0092] The structure in which the electrode terminal 23 is mounted on the battery cell housing 21 can be varied. For example, in... Figure 3 In this embodiment, two electrode terminals 23 are mounted on the end cap 212. Of course, the structure of the battery cell 20 is not limited to this. In other embodiments, both electrode terminals 23 may be mounted on the housing 211 of the battery cell housing 21. Similarly, one electrode terminal 23 may be mounted on the housing 211 of the battery cell housing 21, and the other electrode terminal 23 may be mounted on the end cap 212 of the battery cell housing 21.

[0093] The following reference Figures 2 to 11 The embodiments of this application will be described in detail below.

[0094] Figures 2 to 11 In the diagram, the direction of arrow X is designated as the first direction X, the direction of arrow Y as the second direction Y, and the direction of arrow Z as the third direction Z. The first direction X, the second direction Y, and the third direction Z can be perpendicular to each other. Specifically, 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.

[0095] This application provides a battery device 100, including: a housing 10, including a first wall 13, the first wall 13 having an opening 131; a battery cell 20, disposed within the housing 10; an electronic control assembly 30, including a circuit board 31 and a circuit board housing 32, the circuit board housing 32 being connected to the first wall 13 by a fastener 40, the circuit board housing 32 closing the opening 131, the circuit board 31 being disposed within the circuit board housing 32 and electrically connected to the battery cell 20; and a sealing member 50, disposed between the circuit board housing 32 and the first wall 13, and surrounding the opening 131; wherein, the outer surface 13a of the first wall 13 has a plurality of blind holes 132, the plurality of blind holes 132 being distributed circumferentially along the opening 131, the circuit board housing 32 has a plurality of through holes 321 corresponding to the plurality of blind holes 132, and the fastener 40 passing through the through holes 321 and connected to the corresponding blind holes 132.

[0096] The housing 10 provides assembly space for the battery cell 20. The housing 10 may include a body 11 and a cover 12, which close together to define an assembly space for accommodating the battery cell 20. Figure 4 The cover 12 can be a hollow structure with one end open. The cover 12 has a top wall along the third direction Z and a side wall 121 connected to the outer periphery of the top wall. The side wall 121 and the top wall form a hollow structure with an opening facing the box body 11.

[0097] The housing 10 includes a first wall 13 with an opening 131. The first wall 13 is used to mount the circuit board housing 32 of the electronic control assembly 30, and the opening 131 allows a wire 60 connecting the circuit board 31 of the electronic control assembly 30 and the battery cell 20 to pass through. The first wall 13 can be any wall in the housing 10; for example, the first wall 13 can be the side wall 121 of the cover 12. Figure 4 (As shown). Of course, the first wall 13 can also be the side wall of the box body 11. In the following embodiments, the first wall 13 is described as the side wall 121 of the cover 12.

[0098] The battery cell 20 is the source of electrical energy required for the electrochemical reaction. The battery cell 20 stores and releases energy through chemical reactions, thereby providing power to external devices. The battery cell 20 can have various shapes, such as cylindrical, square, or prismatic. The battery cell 20 can also be a pouch cell. The number of battery cells 20 can be one or more; when there are multiple battery cells 20, they can be connected in parallel or in series. This application does not impose any particular limitations on the shape or type of the battery cell 20.

[0099] The electronic control component 30 may be a cell supervision circuit (CSC), which is used to collect the status information of the individual battery cells 20 and transmit it to the battery management system (BMS) to ensure the stable and efficient operation of the battery device 100.

[0100] The electronic control assembly 30 includes a circuit board 31 and a circuit board housing 32. The circuit board 31 is disposed within the circuit board housing 32 and is electrically connected to the battery cell 20. The circuit board 31 is the main component in the electronic control assembly 30 responsible for monitoring the state of the battery cell 20, and it can integrate battery voltage detection circuit, current detection circuit, temperature detection circuit, communication module, etc. The circuit board 31 can also integrate multiple connectors 311, such as power supply connectors, communication connectors, etc.

[0101] The circuit board housing 32 is connected to the first wall 13 by fasteners 40, and the circuit board housing 32 closes the opening 131. The circuit board housing 32 is connected to the outside of the first wall 13 to improve the utilization of the internal space of the housing 10. The circuit board housing 32 can also be a hollow structure with one side open to accommodate the circuit board 31. The circuit board housing 32 closes the opening 131 to cover it. The circuit board housing 32 can also be called the CSC bottom shell. The circuit board housing 32 can be an injection molded part or a metal part. The injection molded part can be fiber reinforced resin, such as carbon fiber reinforced resin, glass limiting reinforced resin, etc. The metal part can be aluminum, aluminum alloy, stainless steel, etc.

[0102] Fastener 40 can be, for example, a bolt, screw, or other part that can perform a locking function.

[0103] A seal 50 is disposed between the circuit board housing 32 and the first wall 13, and surrounds the opening 131 to seal the opening 131. The seal 50 can be made of a material with good elasticity and plasticity, such as rubber or silicone. For example, the seal 50 can be a rubber ring, which can be quickly cut and formed by a die-cutting process.

[0104] The outer surface 13a of the first wall 13 is provided with a plurality of blind holes 132, which are distributed circumferentially along the opening 131. The circuit board housing 32 is provided with a plurality of through holes 321 corresponding to the plurality of blind holes 132. Fasteners 40 pass through the through holes 321 and are connected to the corresponding blind holes 132.

[0105] The outer surface 13a of the first wall 13 ( Figure 6 (As shown) is the side of the first wall 13 away from the battery cell 20 along the thickness direction. The inner surface 13b of the first wall 13 ( Figure 6(As shown) is the side of the first wall 13 closest to the battery cell 20 along its thickness direction. One end of the blind hole 132 extends into the first wall 13, and the other end penetrates the outer surface 13a of the first wall 13. Multiple blind holes 132 are distributed circumferentially along the opening 131. (Refer to...) Figure 8 Multiple blind holes 132 can be distributed at equal intervals along the circumference of the opening 131.

[0106] The circuit board housing 32 is provided with a plurality of through holes 321 corresponding to a plurality of blind holes 132. Fasteners 40 pass through the through holes 321 and are connected to the corresponding blind holes 132. The plurality of blind holes 132 correspond one-to-one with the plurality of through holes 321. A fastener 40 passes through each through hole 321 and is connected to the corresponding blind hole 132 to fix the circuit board housing 32 to the first wall 13.

[0107] Multiple blind holes 132 are provided on the outer surface 13a of the first wall 13 of the housing 10, and multiple through holes 321 corresponding to the multiple blind holes 132 are provided on the circuit board housing 32. Fasteners 40 are inserted through the through holes 321 and connected to the corresponding blind holes 132 to install the circuit board housing 32 onto the first wall 13. Thus, there is only one sealing interface between the circuit board housing 32 and the first wall 13. The seal 50 seals the opening 131 on the first wall 13, which greatly reduces the sealing difficulty, improves the sealing reliability, simplifies the structure of the seal 50, and reduces the cost.

[0108] In some embodiments, the blind hole 132 is provided with an insert 134 that engages with the fastener 40.

[0109] The insert 134 and the blind hole 132 can be an integral structure to improve the stability of the insert 134 in the blind hole 132. For example, if the cover 12 is an injection molded part, the insert 134 is embedded in the blind hole 132 during the injection molding process.

[0110] Insert 134 can also be installed in blind hole 132 after blind hole 132 is formed, for example, insert 134 and blind hole 132 are connected by over-fitting.

[0111] The forming method of blind hole 132 is not limited to injection molding. For example, after the cover body 12 is formed, blind hole 132 can be formed by processing on the outer surface 13a of the first wall 13.

[0112] As an example, refer to Figure 6 and Figure 9 An insert 134 is embedded in each blind hole 132. The insert 134 may be a nut, and the fastener may be a screw, bolt, etc.

[0113] By providing an insert 134 in the blind hole 132 that cooperates with the fastener 40, the connection between the circuit board housing 32 and the first wall 13 can be made more secure, improving connection reliability and reducing the risk of seal failure.

[0114] In some embodiments, the inner surface 13b of the first wall 13 is formed with a plurality of protrusions 133, the plurality of protrusions 133 corresponding to a plurality of blind holes 132, and one end of the blind hole 132 extending into the corresponding protrusion 133.

[0115] Multiple protrusions 133 are distributed circumferentially along the opening 131. Each protrusion 133 is provided with a blind hole 132. Along the thickness direction of the first wall 13, one end of the blind hole 132 extends into the corresponding protrusion 133, and the other end penetrates the outer surface 13a of the first wall 13.

[0116] The shape of the protrusion 133 can be various shapes such as cylinder, prism, and square, and there are no particular limitations in the embodiments of this application. Figure 10 The diagram shows that the protrusion 133 is cylindrical in shape. The protrusion 133 can be integrally formed with the cover 12, for example, by injection molding, to improve molding efficiency.

[0117] The inner surface 13b of the first wall 13 forms a plurality of protrusions 133 corresponding to a plurality of blind holes 132. The protrusions 133 are formed at the positions where blind holes 132 need to be set on the first wall 13, which can strengthen the strength of the blind holes 132 on the first wall 13, thereby improving the connection strength between the fastener 40 and the blind holes 132. Other positions of the first wall 13 can be appropriately thinned to facilitate weight reduction.

[0118] In some embodiments, refer to Figure 6 , Figure 7 and Figure 10 The circuit board housing 32 includes a housing body 322 and a flange portion 323. The flange portion 323 is disposed on the outer periphery of the housing body 322. A through hole 321 is disposed on the flange portion 323. A sealing member 50 is disposed between the flange portion 323 and the first wall 13. A reinforcing rib 14 is formed on the inner surface 13b of the first wall 13. In the same projection plane perpendicular to the thickness direction X of the first wall 13, the orthographic projection of the reinforcing rib 14 at least partially overlaps with the orthographic projection of the flange portion 323.

[0119] The outer casing 322 may be formed with a hollow structure opening towards the first wall 13, and the circuit board 31 is fixed in the hollow structure of the outer casing 322. One end of the flange 323 is connected to the outer peripheral surface of the outer casing 322, and the other end extends out along the outer side of the outer casing 322. The flange 323 is provided with a plurality of through holes 321 corresponding to a plurality of blind holes 132. The outer casing 322 and the flange 323 may be integrally formed.

[0120] A reinforcing rib 14 is formed on the inner surface 13b of the first wall 13. The reinforcing rib 14 can be integrally formed with the first wall 13, for example, by injection molding.

[0121] In the same projection plane perpendicular to the thickness direction X of the first wall 13, the orthographic projection of the reinforcing rib 14 at least partially overlaps with the orthographic projection of the flange portion 323. The reinforcing area formed by the reinforcing rib 14 may completely overlap with or partially overlap with the flange portion 323.

[0122] The reinforcing rib 14 can have various structures, such as ring structure, cross structure, grid structure, honeycomb structure, etc.

[0123] By having the reinforcing rib 14 at least partially overlap with the flange portion 323, the strength of the first wall 13 at the position corresponding to the flange portion 323 can be strengthened, thereby improving the reliability of the connection between the circuit board housing 32 and the first wall 13. In addition, the previous liner plate can be omitted, reducing manufacturing costs and improving assembly efficiency.

[0124] In some embodiments, refer to Figure 10 Reinforcing ribs 14 are arranged around the opening 131.

[0125] Reinforcing ribs 14 are distributed around the opening 131. The reinforcing ribs 14 can be a continuous reinforcing structure or multiple reinforcing structures arranged at intervals. Figure 10 The annular reinforcing rib 14 is shown in the figure.

[0126] Since the first wall 13 is relatively weak near the opening 131, especially in the current pursuit of the ultra-thin and light box 10, the opening 131 is more likely to cause insufficient strength of the first wall 13. By setting the reinforcing ribs 14 around the opening 131, the strength of the first wall 13 can be compensated and the connection reliability between the circuit board shell 32 and the first wall 13 can be improved.

[0127] In some embodiments, two adjacent protrusions 133 are connected by a reinforcing rib 14.

[0128] As an example, refer to Figure 10 The reinforcing rib 14 includes a first reinforcing rib 141, a second reinforcing rib 142 and a third reinforcing rib 143. The first reinforcing rib 141 and the second reinforcing rib 142 are both annular. The first reinforcing rib 141 connects multiple protrusions 133 together. The second reinforcing rib 142 surrounds the outer periphery of the first reinforcing rib 141. The third reinforcing rib 143 connects the second reinforcing rib 142 and the first reinforcing rib 141.

[0129] Two adjacent protrusions 133 are connected by reinforcing ribs 14, which can strengthen the protrusions 133 and thus improve the reliability of the connection between the circuit board housing 32 and the first wall 13.

[0130] In some embodiments, refer to Figure 6 and Figure 7 Multiple fasteners 40 are provided on the outer periphery of the seal 50.

[0131] Multiple fasteners 40 are disposed on the outer periphery of the seal 50. The seal 50 may be located between the multiple fasteners 40 and the opening 131. The fasteners 40 do not pass through the seal 50. The seal 50 can be quickly cut and formed using a die-cutting process, without the need to create holes for the fasteners 40 to pass through. The cross-section of the seal 50 may be, for example, circular, elliptical, or square.

[0132] Multiple fasteners 40 are provided on the outer periphery of the seal 50, eliminating the need for holes in the seal 50 for the fasteners 40 to pass through, thus simplifying the forming process of the seal 50, improving production efficiency, and reducing costs.

[0133] In some embodiments, the housing 10 includes a housing body 11 and a cover 12, the cover 12 being disposed on the housing body 11 to form a closed space for accommodating the battery cell 20, and the first wall 13 being the side wall 121 of the cover 12.

[0134] The first wall 13 is the side wall 121 of the cover 12. The electronic control component 30 is fixed to the side wall 121. When the battery cell 20 is placed "upright" in the box 10, that is, when the electrode terminal 23 of the battery cell 20 faces the top surface of the cover 12, the connector interface of the electronic control component 30 is closer to the electrode terminal 23 of the battery cell 20, which facilitates the installation of the wire 60.

[0135] In some embodiments, the cover 12 is an injection molded part.

[0136] The injection molded part can be made of fiber-reinforced resin, such as carbon fiber reinforced resin or glass fiber reinforced resin. The protrusion 133, reinforcing rib 14, blind hole 132 and insert 134 can be integrally injection molded with the cover 12.

[0137] The cover 12 is an injection molded part, which can be quickly molded, improve production efficiency, and also help reduce the weight of the cover 12, making the battery device 100 lighter.

[0138] The following reference Figures 2 to 11 A specific example of this application will be described in detail below.

[0139] This application provides a battery device 100, including a housing 10, a battery cell 20, and an electronic control assembly 30.

[0140] The housing 10 includes a housing body 11 and a cover 12, which covers the housing body 11 and together form a closed space for accommodating the battery cell 20. An opening 131 is provided on the side wall 121 (first wall 13) of the cover 12. Multiple protrusions 133 (protrusions) are formed on the inner surface 13b of the first wall 13, distributed circumferentially along the opening 131. Each protrusion 133 has a blind hole 132, one end of which extends into the protrusion 133 and the other end penetrates the outer surface 13a of the first wall 13. An insert 134 is embedded in each blind hole 132. A reinforcing rib 14 is also formed on the inner surface 13b of the first wall 13, connecting two adjacent protrusions 133.

[0141] The electronic control assembly 30 is a battery cell monitoring unit (CSC). The electronic control assembly 30 includes a circuit board 31 and a circuit board housing 32 that houses the circuit board 31. The circuit board 31 is connected to the battery cell 20 via a wire 60. One end of the wire 60 is connected to a connector on the circuit board 31, and the other end passes through the opening 131 and connects to the battery cell 20. The circuit board housing 32 is fixed to the first wall 13 by fasteners 40. The circuit board housing 32 includes a housing body 322 and a flange portion 323 disposed on the outer periphery of the housing body 322. The flange portion 323 has through holes 321 corresponding to multiple blind holes 132. The fasteners 40 pass through the through holes 321 and engage with inserts 134 in the corresponding blind holes 132. The fasteners 40 are screws, and the inserts 134 are nuts. A sealing element 50 is disposed between the flange portion 323 and the first wall 13. The sealing element 50 surrounds the opening 131, and the fasteners 40 are located on the outer periphery of the sealing element 50. The sealing element 50 is a die-cut part.

[0142] This application also provides an electrical device, including: a battery device 100 of any of the above embodiments.

[0143] Since the sealing interface between the circuit board housing 32 and the first wall 13 of the housing 10 is reduced in the battery device 100 of this application embodiment, the sealing reliability is improved. As a result, the reliability of the power device including the battery device 100 of this application embodiment is also improved.

[0144] This application also provides an energy storage device 2000, which includes an energy storage cabinet 2010 and a battery device 100 from any of the above embodiments. The energy storage device 2000 includes energy storage containers, energy storage cabinets, etc. (Refer to...) Figure 12 The energy storage cabinet 2010 has a storage space to accommodate at least one battery device 100, and the energy storage cabinet 2010 has a door 2011 on at least one side.

[0145] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized by, The battery device comprises: a box body comprising a first wall provided with an opening; a battery cell arranged in the box body; an electric control assembly comprising a circuit board and a circuit board shell, the circuit board shell is connected with the first wall by a fastener, the circuit board shell encloses the opening, the circuit board is arranged in the circuit board shell and electrically connected with the battery cell; a sealing member arranged between the circuit board shell and the first wall and around the opening; wherein an outer surface of the first wall is provided with a plurality of blind holes, the plurality of blind holes are distributed along a circumferential direction of the opening, the circuit board shell is provided with a plurality of through holes corresponding to the plurality of blind holes, and the fastener is arranged in the through hole and connected with the corresponding blind hole.

2. The battery device according to claim 1, wherein an inner surface of the first wall is formed with a plurality of convex portions corresponding to the plurality of blind holes, and one end of the blind hole extends into the corresponding convex portion.

3. The battery device according to claim 2, wherein the circuit board shell comprises a shell body and a flange portion arranged on the outer circumferential side of the shell body, the through hole is arranged on the flange portion, and the sealing member is arranged between the flange portion and the first wall; the inner surface of the first wall is formed with a reinforcing rib, and in the same projection plane perpendicular to the thickness direction of the first wall, the orthogonal projection of the reinforcing rib at least partially overlaps with the orthogonal projection of the flange portion.

4. The battery device according to claim 3, wherein the reinforcing rib is arranged around the opening.

5. The battery device according to claim 3, wherein two adjacent convex portions are connected by the reinforcing rib.

6. The battery device according to claim 1, wherein a plurality of fasteners are arranged on the outer circumferential side of the sealing member.

7. The battery device according to claim 1, wherein the blind hole is provided with an insert matched with the fastener.

8. The battery device according to claim 1, wherein the box body comprises a box body and a cover, the cover is arranged on the box body to form a closed space for accommodating the battery cell, and the first wall is a side wall of the cover.

9. The battery device according to claim 8, wherein the cover is an injection molding part.

10. An electrical device, characterized by The battery device according to any one of claims 1-9. The battery device according to any one of claims 1-9.

11. An energy storage device, characterized by, ​ ​

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