Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment, and relates to the technical field of batteries. The battery pack comprises a circuit board, a shell assembly and a battery pack, the battery pack is arranged in the shell assembly, the battery pack comprises a plurality of battery cells, and the shell assembly is used for limiting the plurality of battery cells; the circuit board is fixedly arranged on the shell assembly and electrically connected with the battery cell. According to the battery pack and the electric equipment provided by the invention, the circuit board is fixedly arranged on the shell assembly, so that the assembly gap between the circuit board and the shell assembly is reduced, the failure of the battery pack caused by resonance is avoided, the service life of the battery pack is prolonged, and the potential safety hazard is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery pack and an electrical device. Background Art

[0002] For current battery packs, considering safety and electrical performance, a circuit board is usually configured for the battery pack. In related technologies, a transfer board is usually provided between the circuit board and the battery pack. The transfer board is welded to the electrode tabs of the battery cells, the circuit board is arranged on the transfer board, and after the circuit board is connected to the battery pack, the whole needs to be installed in a housing.

[0003] However, due to the relatively soft structure of the electrode tabs and the assembly gap between the circuit board and the housing, under certain working conditions, the battery pack will vibrate at different frequencies. At this time, the circuit board is prone to resonance, and the circuit board will drive the transfer board to displace, resulting in the disconnection of the connection with the battery pack, causing battery damage, and even triggering safety accidents such as fire and explosion. Summary of the Utility Model

[0004] In view of the above problems, the present application provides a battery pack and an electrical device. By fixedly arranging the circuit board on the housing assembly, the assembly gap between the circuit board and the housing assembly is reduced, and the overall positions of the components in the housing assembly are fixed, overcoming the risk of resonance of the circuit board caused by the overall vibration of the battery in related technologies, avoiding the failure of the battery pack caused by resonance, improving the service life of the battery pack, and reducing potential safety hazards.

[0005] The present application provides a battery pack, including: a housing assembly; a battery pack arranged in the housing assembly, the battery pack including a plurality of battery cells, and the housing assembly being used for limiting the plurality of battery cells; a circuit board fixedly arranged on the housing assembly and electrically connected to the battery cells.

[0006] By fixedly arranging the circuit board on the housing assembly, the assembly gap between the circuit board and the housing assembly is reduced. In addition, the overall positions of the components in the housing assembly are fixed, overcoming the risk of resonance of the circuit board caused by the overall vibration of the battery in related technologies, avoiding the failure of the battery pack caused by resonance, improving the service life of the battery pack, and reducing potential safety hazards.

[0007] In some embodiments, the housing assembly includes: a fixed baffle for restricting the movement of the battery pack; a bracket assembly fixedly connected to the fixed baffle.

[0008] The fixed baffle and the bracket assembly are important components to ensure the structural stability of the battery pack, undertaking functions such as fixing the battery cells, supporting internal components, and providing an installation platform for the circuit board. The setting of the fixed baffle and the bracket assembly ensures the stability and safety of the battery pack.

[0009] In some embodiments, the battery cell is provided with tabs, and one of the fixing baffle and the bracket assembly is penetrated by the tabs for electrical connection with the circuit board.

[0010] The tabs of the battery cell can be directly connected to the circuit board by penetrating the fixing baffle or the bracket assembly, reducing the assembly steps and complexity, ensuring the assembly efficiency, saving the space inside the battery pack, improving the space utilization rate of the battery pack, and enhancing the market competitiveness.

[0011] In some embodiments, the tabs penetrate the bracket assembly for electrical connection with the circuit board.

[0012] The bracket assembly is one of the main supporting structures inside the battery pack, providing a stable supporting platform for the circuit board. The tabs are connected to the circuit board by penetrating the bracket assembly, ensuring the connection stability between the tabs and the circuit board.

[0013] In some embodiments, the circuit board is fixedly connected to the bracket assembly.

[0014] A stable overall structure is formed among the circuit board, the bracket assembly, and the fixing baffle, enhancing the rigidity and anti-deformation ability of the battery pack, and reducing the possibility of structural damage to the battery pack caused by external factors such as vibration and impact.

[0015] In some embodiments, the bracket assembly includes: a mounting bracket, and the mounting bracket is fixedly connected to the fixing baffle.

[0016] Through the connection between the mounting bracket and the fixing baffle, a stable and reliable internal structure of the battery pack can be formed, improving the overall performance and safety of the battery pack, and making the internal structure of the battery pack modular, so that the assembly and maintenance processes of the battery pack are clear, simplifying the assembly and maintenance processes.

[0017] In some embodiments, the bracket assembly further includes: a sampling device, and the sampling device is disposed on the mounting bracket and is electrically connected to the tabs and the circuit board respectively.

[0018] The sampling device is an important component of the battery pack. Through the stable connection with the mounting bracket, its own installation stability is achieved. The electrical connection with the tabs and the circuit board realizes the monitoring and management of the state of the battery cells inside the battery pack, ensuring convenience and high efficiency of maintenance and repair.

[0019] In some embodiments, the mounting bracket is disposed on one side of the battery pack.

[0020] The compactness of the internal components of the housing assembly is ensured.

[0021] In some embodiments, the mounting bracket includes a first surface facing the battery cell and a second surface facing away from the battery cell, and the sampling device is disposed on one of the first surface and the second surface.

[0022] When the mounting bracket is mounted on the battery cell, it will fit or abut against the end of the battery cell, shortening the length of the required circuit, reducing the resistance attenuation, and also providing a connection and fixing platform for the sampling device and the circuit board, ensuring the stability of the overall structure.

[0023] In some embodiments, the sampling device is disposed on the second surface;

[0024] The mounting bracket is provided with avoidance holes corresponding to the tab ears, and the tab ears pass through the avoidance holes and are electrically connected to the sampling device.

[0025] By disposing the sampling device on the second surface of the mounting bracket and designing the avoidance holes to allow the tab ears to pass through and be connected, the internal structure of the battery pack is optimized, the space utilization rate of the battery pack is improved, and the setting of the avoidance holes enables the tab ears to pass through the avoidance holes when the mounting bracket is installed, realizing the preliminary assembly of the mounting bracket, and simplifying the assembly process of the battery pack.

[0026] In some embodiments, the mounting bracket is provided with two groups of holes arranged along the third direction, and each group of holes includes a plurality of the avoidance holes.

[0027] The space utilization between the battery pack and the mounting bracket is optimized, the space utilization rate in the accommodation cavity is improved or the overall volume of the battery is reduced, enhancing the market competitiveness. At the same time, the mounting reliability of the mounting bracket is also improved. By precisely designing the positions of the avoidance holes and the hole groups, it is ensured that the tab ears can be accurately connected to the sampling device.

[0028] In some embodiments, the mounting bracket further includes placement portions, there are a plurality of the placement portions, the placement portions are located between two adjacent ones of the avoidance holes, and the placement portions are adapted to carry the tab ears;

[0029] The sampling device includes a plurality of sampling members, the sampling members are disposed on the placement portions and are electrically connected to the tab ears on at least one side of the placement portions.

[0030] The settings of the placement portions and the sampling members enable the sampling device to be more closely integrated into the mounting bracket, reducing the additional space occupation and weight. At the same time, by directly disposing the sampling members on the placement portions near the tab ears, a more stable electrical connection between the sampling members and the tab ears can be achieved, while ensuring the accuracy of the sampling members' monitoring of the electrical signals of the tab ears.

[0031] In some embodiments, the hole group is divided into a plurality of hole units arranged in sequence and at intervals along a first direction. Each hole unit includes two adjacent avoidance holes, and the placement portion is disposed between the two adjacent avoidance holes in each hole unit.

[0032] By dividing the hole group into multiple hole units, each sampling member can be electrically connected to the tab ears in two avoidance holes within its corresponding hole unit, so as to simultaneously collect the operating conditions of two battery cells. Moreover, by independently arranging each hole unit, when maintenance or repair is required for the sampling device or the tab ears, it is easier to locate the specific hole unit for operation, thereby improving the maintenance efficiency.

[0033] In some embodiments, each sampling member is electrically connected to two tab ears with opposite polarities belonging to two battery cells on both sides; the multiple battery cells are arranged in series, and the arrangement order of the two tab ears of two adjacent battery cells is opposite along the third direction.

[0034] The sampling member is placed between the tab ears of two adjacent battery cells and is electrically connected to them. Since the tab ears of two adjacent battery cells have opposite polarities, each sampling member will be connected to two tab ears with opposite polarities. In this way, the sampling member can simultaneously monitor the voltage difference between the two battery cells, and then judge the working state and performance of the battery cells. When a certain battery cell fails or its performance deteriorates, the sampling member will be able to detect abnormal voltage and transmit a signal to the circuit board, and then the circuit board triggers protection measures, such as disconnecting the faulty battery cell, restricting current output, etc., to ensure the safety and reliability of the battery pack.

[0035] In some embodiments, the mounting bracket is further provided with a fixing structure for fixing the sampling member disposed on the placement portion.

[0036] The setting of the fixing structure ensures that the sampling member can be stably mounted on the placement portion, guaranteeing the reliability and safety of the battery pack during operation.

[0037] In some embodiments, fixing structures are respectively provided on both sides of each placement portion along the third direction.

[0038] The setting of the fixing structure ensures that the sampling member can be stably mounted on the placement portion, guaranteeing the reliability and safety of the battery pack during operation.

[0039] In some embodiments, the fixing structure is a snap button extending along the third direction, and the snap button is in pressing fit with the surface of the sampling member facing away from the placement portion.

[0040] When the sampling part is placed on the placement part, the spring buckle will automatically pop up and be in close contact with the surface of the sampling part on the side opposite to the placement part. Fixation is achieved through the pressing action, ensuring the stability and reliability of the sampling part during the installation process. At the same time, due to the certain elasticity of the spring buckle, it can adapt to the small displacement or deformation of the sampling part during the installation process, thus maintaining close contact with the sampling part. During subsequent use, even if vibrations or impacts occur, under the pressing action of the spring buckle, the stability of the sampling part can still be ensured. In addition, when the sampling part is installed, the end in the third direction is fixed by the spring buckle through pressing, and the end in the first direction faces the pole ear and is electrically connected to the pole ear, improving the rationality of the spatial layout of the spring buckle design.

[0041] In some embodiments, a plurality of the battery cells are arranged side by side in the first direction, and two pole ears with opposite polarities are provided at one end of each battery cell in the second direction, and the two pole ears are arranged at intervals in the third direction.

[0042] The two pole ears have opposite polarities, one is the positive pole ear and the other is the negative pole ear, and the two pole ears realize the current transmission between the battery cell and the external device of the battery cell.

[0043] In some embodiments, the first direction, the second direction, and the third direction are perpendicular to each other in pairs.

[0044] The first direction, the second direction, and the third direction are perpendicular to each other in pairs, and the three-dimensional layout of the first direction, the second direction, and the third direction helps to arrange the battery cells efficiently in a limited space to improve the energy density of the battery pack.

[0045] In some embodiments, the pole ears in the battery pack are arranged in two rows spaced in the third direction, and each row includes a plurality of the pole ears corresponding one by one to the avoidance holes belonging to the same hole group. The pole ears extend from one side of the first surface of the mounting bracket to the other side of the second surface of the mounting bracket through the corresponding avoidance holes to be connected to the sampling device.

[0046] The space utilization between the battery pack and the mounting bracket is optimized, the space utilization rate in the accommodation cavity is improved or the overall volume of the battery is reduced, the market competitiveness is improved, and at the same time, the mounting reliability of the mounting bracket is also improved. By accurately designing the positions of the avoidance holes and the hole group, it is ensured that the pole ears can be accurately connected to the sampling device.

[0047] In some embodiments, the sampling part is connected to the pole ear by welding.

[0048] The connection reliability between the sampling part and the pole ear is ensured, and further, the stability of the electron conduction path during the charging and discharging process of the battery is ensured, the normal operation of the battery is ensured, and at the same time, the use safety of the battery is also improved.

[0049] In some embodiments, the sampling device further includes: a connection wire harness, which is electrically connected to the sampling component.

[0050] The connection wire harness serves as a bridge between the sampling device and the circuit board, and is used to transmit the electrical signals collected by the sampling component to the circuit board.

[0051] In some embodiments, a wire groove is further formed on the second surface of the mounting bracket, and the connection wire harness is fixedly arranged in the wire groove.

[0052] The connection wire harness serves as a bridge between the sampling device and the circuit board, and is used to transmit the electrical signals collected by the sampling component to the circuit board. A wire groove is further formed on the second surface of the mounting bracket, and the connection wire harness is fixedly arranged in the wire groove. By laying and fixing the connection wire harness in the wire groove, the disorderly distribution of the connection wire harness inside the battery pack is avoided, and the safety hazards caused by problems such as cable entanglement, abrasion or short circuit are reduced. At the same time, the design of the wire groove also improves the overall aesthetics of the battery pack and ensures the compactness and orderliness of its internal structure.

[0053] In some embodiments, the battery pack further includes: an insulating spacer, which is arranged between the end face of the battery cell where the tab is located and the first surface of the mounting bracket, and the tab passes through the insulating spacer.

[0054] The insulating spacer provides electrical insulation for the battery cell, avoiding direct contact between the tab and other metal components except for connection with the sampling component, preventing current from flowing through an unexpected path, and avoiding possible short circuits that may cause damage to the battery pack or even fire and explosion. In addition, the insulating spacer also provides a certain structural support. The insulating spacer can stably abut against the battery cell, avoiding shaking or movement that may occur after the mounting bracket is installed on the battery cell, and ensuring the installation stability of the mounting bracket.

[0055] In some embodiments, a first connection structure is arranged on the second surface of the mounting bracket, a second connection structure is arranged on the circuit board, and the first connection structure of the mounting bracket is fixedly connected to the second connection structure of the circuit board.

[0056] The setting of the first connection structure and the second connection structure realizes the firm connection between the mounting bracket and the circuit board, ensuring the overall stability of the device and the normal operation of the circuit board.

[0057] In some embodiments, the first connection structure includes a stud, a first threaded hole is arranged inside the stud, the second connection structure is formed as a second threaded hole, and the mounting bracket and the circuit board are connected by a fastener passing through the first threaded hole and the second threaded hole in sequence.

[0058] When the circuit board needs to be assembled to the mounting bracket, align the first threaded hole with the second threaded hole. Pass a screw through the second threaded hole of the circuit board and then screw it into the first threaded hole on the stud of the mounting bracket. As the screw rotates, the threads on the screw tightly fit with the two threaded holes, thereby realizing the connection and fixation between the circuit board and the mounting bracket. In this way, a firm connection between the circuit board and the mounting bracket can be ensured, and it is not easy to loosen. At the same time, when disassembling the circuit board, only need to loosen the fastener to achieve disassembly, which improves the convenience of disassembling and replacing the circuit board.

[0059] In some embodiments, a positioning structure is provided on the end face of the stud facing the circuit board. The outer diameter of the positioning structure is smaller than the outer diameter of the stud, and the positioning structure is also in positioning cooperation with the second threaded hole.

[0060] The setting of the positioning structure ensures that the stud can be accurately inserted at the position of the second threaded hole, reduces the assembly error, and improves the assembly efficiency. At the same time, the positioning structure indirectly enhances the connection stability of the subsequent fasteners by ensuring the correct alignment between the stud and the circuit board. In addition, after the positioning structure of the stud is inserted into the second threaded hole, the circuit board and the mounting bracket can be preliminarily positioned before the fastener is installed, which reserves time for the installation operation of the stud.

[0061] In some embodiments, the housing assembly includes two fixed baffles arranged oppositely. Each fixed baffle includes a support portion and a connecting arm. The connecting arms are arranged on both sides of the support portion along the third direction. One end of the connecting arm is connected to the support portion, and the other end extends along the first direction towards the other fixed baffle and is connected to the connecting arm of the other fixed baffle.

[0062] The fixed baffles provide structural support for the battery pack, help the battery pack resist external impacts and vibrations, and ensure the stability and safety of the battery pack in the battery pack. There are two fixed baffles arranged oppositely along the first direction. The relative arrangement of the two fixed baffles helps to clamp and fix the battery pack from both sides. The setting of the connecting arms ensures the stable connection between the fixed baffles. The support portion improves the heat conduction efficiency, reduces the thermal resistance, and at the same time reduces the risk of displacement or damage of the battery pack caused by vibration or impact, maintaining the overall stability.

[0063] In some embodiments, the support portions of the two fixed baffles are respectively located on both sides of the battery pack along the first direction, and the two support portions respectively have a pre-pressure on the battery pack along the first direction towards the battery pack.

[0064] The two support parts respectively have a pre-pressure towards the battery pack in the first direction, and the pre-pressure helps to ensure the close contact between the battery pack and the internal components of the battery pack, such as the insulating spacer, etc., and maintains the overall stability.

[0065] In some embodiments, the mounting bracket is respectively provided with avoidance notches on both sides in the first direction, and the support part is fitted in the avoidance notches and fixedly connected to the mounting bracket.

[0066] Through the avoidance notches, the support part can be directly snapped into and locked in a preset position, ensuring the firm connection between the mounting bracket and the fixed baffle, and realizing the effective support and fixation of the battery pack.

[0067] In some embodiments, the mounting bracket is further provided with a receiving part for receiving the connector of the battery pack.

[0068] The receiving part has a certain protection and isolation function to prevent the connector from being affected by external impacts, vibrations, etc., and to avoid crosstalk of the connector and interference with other components. At the same time, by providing the receiving part on the mounting bracket, the connector is integrated with other components such as the battery pack, improving the compactness of the battery pack, simplifying the internal wiring of the battery pack, ensuring the neatness of the wiring, and reducing the assembly and maintenance difficulty.

[0069] In some embodiments, the battery pack further includes a housing, and the housing includes: a bottom case and an upper cover. One end of the bottom case is open, and the upper cover is disposed on the opening and connected to the bottom case. The upper cover and the bottom case jointly define the receiving cavity, and the receiving cavity is adapted to receive the housing assembly, the battery pack and the circuit board.

[0070] The bottom case is the basis of the entire housing for supporting and fixing the internal components, and the upper cover is used to jointly define a closed or semi-closed receiving cavity with the bottom case. The cooperation of the bottom case and the upper cover provides a safe and stable working environment for the components inside the battery.

[0071] In some embodiments, the bottom case has a first connecting edge, and the upper cover is provided with a second connecting edge, and the first connecting edge and the second connecting edge are connected to each other.

[0072] The connection of the first connecting edge and the second connecting edge ensures the cooperation between the bottom case and the upper cover to jointly form a closed or semi-closed receiving cavity to receive the internal components, ensuring the protection of the internal components and the integrity of the battery pack structure.

[0073] In some embodiments, one of the first connecting edge and the second connecting edge is sleeved outside the other;

[0074] The first connecting edge is provided with a first fixing hole, and the second connecting edge is provided with a second fixing hole. The housing further includes: a fastening connector, which passes through the first fixing hole and the second fixing hole to connect the first connecting edge and the second connecting edge;

[0075] A plurality of avoidance grooves corresponding to the fastening connectors one by one are provided on the periphery of the mounting bracket, and the fastening connectors are located in the avoidance grooves.

[0076] The fastening connector passes through the first fixing hole and the second fixing hole, and firmly connects the bottom case and the upper cover by means of threaded connection, locking or clamping, etc. The avoidance groove provides enough space for the fastening connector to ensure that they can smoothly pass through the first fixing hole and the second fixing hole, and avoid interference with the mounting bracket, ensuring the installation stability of the fastening connector.

[0077] In some embodiments, the housing further includes: a sealing ring, which is provided between the first connecting edge and the second connecting edge to seal the gap between the upper cover and the bottom case.

[0078] The sealing ring ensures the sealing performance between the upper cover and the bottom case through its own elasticity and sealing performance, prevents the exchange of liquid, gas or dust and other impurities between the inside of the battery pack and the external environment, and avoids damage to the battery module and other internal components in the accommodating cavity.

[0079] In some embodiments, the second connecting edge includes a mounting outer edge for mounting the sealing ring, the mounting outer edge surrounds the upper cover for one week, and the sealing ring is fixed to the second connecting edge.

[0080] By designing the mounting outer edge and fixing the sealing ring, it is ensured that the gap between the upper cover and the bottom case is sealed, which helps to prevent impurities in the external environment from entering the inside of the battery pack, and also maintains the stability and safety of the internal environment of the battery pack.

[0081] In some embodiments, through holes are further provided on the peripheral wall of the sealing ring, the through holes correspond to the first fixing hole and the second fixing hole one by one, and the fastening connector also passes through the through holes.

[0082] It is ensured that while the fastening connector connects the bottom case and the upper cover, it can also pass through the sealing ring through the through holes, without damaging the integrity and sealing performance of the sealing ring. The fastening connector passes through the through holes and cooperates with the first fixing hole and the second fixing hole, and also forms a stable connection structure, ensuring the stability of the sealing ring during the connection process and avoiding sealing failure caused by insecure connection.

[0083] In some embodiments, a plurality of positioning convex portions are further provided on one side of the sealing ring facing the upper cover, and the positioning convex portions are in positioning cooperation with the upper cover.

[0084] The provision of the positioning convex portions ensures that the sealing ring can be accurately positioned at a preset position during the installation process, avoiding poor sealing caused by deviation or misalignment. Moreover, the positioning convex portions provide an assembly mark for the assembler, simplifying the assembly process and improving the assembly efficiency and accuracy.

[0085] In some embodiments, the positioning convex portions are opposite to the through holes in the second direction, and the positioning convex portions are in positioning cooperation within the avoidance grooves.

[0086] By fitting the positioning convex portions within the avoidance grooves, a firm connection is formed between the sealing ring and the mounting bracket. Thus, the installation stability of the sealing ring is further increased, preventing the sealing ring from loosening or falling off due to factors such as vibration and impact during use.

[0087] In some embodiments, a fixing groove is further provided on the peripheral edge of the upper cover, an outer extension portion is provided on the peripheral edge of the sealing ring, the outer extension portion is fixedly arranged within the fixing groove, and the outer extension portion is provided with a glue injection hole for injecting connection glue between the outer extension portion and the inner wall of the fixing groove.

[0088] The cooperation between the fixing groove and the outer extension portion and the injection of the connection glue improve the fixing effect of the sealing ring, enabling the sealing ring to be more firmly installed on the housing, not easily displaced or fallen off, and ensuring the installation stability of the sealing ring.

[0089] In some embodiments, the mounting bracket is a plastic part.

[0090] In this way, the mounting bracket is easy to manufacture and has a low cost.

[0091] This application also provides an electrical device including the battery pack described in any one of the above.

[0092] According to the battery pack and the electrical device of this application, by fixedly arranging the circuit board in the housing assembly, the assembly gap between the circuit board and the housing assembly is reduced, and the overall positions of the components within the housing assembly are fixed. This overcomes the risk of circuit board resonance caused by the overall vibration of the battery in the related art, avoids the failure of the battery pack caused by resonance, improves the lifespan of the battery pack, and reduces potential safety hazards. Description of the Drawings

[0093] To more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings required for the description of the embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0094] Figure 1 It is a schematic diagram of the internal structure of the battery pack according to the embodiment of the present application;

[0095] Figure 2 It is a partial exploded view of the battery pack according to the embodiment of the present application;

[0096] Figure 3 It is a schematic diagram of the structure of the mounting bracket according to the first perspective of the embodiment of the present application;

[0097] Figure 4 It is a schematic diagram of the structure of the mounting bracket according to the second perspective of the embodiment of the present application;

[0098] Figure 5 It is a schematic diagram of the structure of the mounting bracket according to the third perspective of the embodiment of the present application;

[0099] Figure 6 It is a schematic diagram of the structure of the mounting bracket according to the fourth perspective of the embodiment of the present application;

[0100] Figure 7 It is a schematic diagram of the structure of the housing assembly according to the embodiment of the present application.

[0101] Explanation of reference numerals:

[0102] 100 - Outer shell; 110 - Bottom shell; 111 - First connecting edge; 120 - Upper cover; 130 - Fastening connecting piece;

[0103] 200 - Battery pack; 210 - Battery cell;

[0104] 300 - Bracket assembly; 310 - Mounting bracket; 310a - First surface; 310b - Second surface;

[0105] 311 - Avoidance hole; 312 - Hole group; 3121 - Hole unit; 313 - Placement part; 314 - Wire groove; 3141 - Main groove; 3142 - Branch groove; 3143 - Limiting part; 315 - Avoidance notch; 316 - Accommodation part; 317 - Avoidance groove; 318 - Mounting part; 319 - Avoidance channel;

[0106] 320 - Sampling device; 321 - Sampling piece; 322 - Connection wire harness;

[0107] 331 - First mounting hole;

[0108] 400 - Circuit board;

[0109] 500 - Fixing structure; 510 - Snap fastener;

[0110] 600 - First connection structure; 610 - Stud; 611 - Positioning structure;

[0111] 700 - Fixing baffle; 710 - Support part; 720 - Connecting arm;

[0112] 800 - Sealing ring; 810 - Through hole; 820 - Positioning convex part; 830 - Extension part;

[0113] 900 - Insulating spacer. Detailed implementation mode

[0114] In order to make the above - mentioned objects, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0115] Considering the safety and performance of the battery, a circuit board needs to be provided on the battery. The circuit board is also called a printed circuit board or PCB board. Specifically, through a fine circuit design, the circuit board connects the electrode tabs of the battery cells inside the battery with external loads or charging devices to ensure the electrical connection of the battery. In addition, in complex systems such as new energy vehicles, the circuit board also integrates a battery management system (BMS) that is responsible for monitoring parameters such as the voltage, current, and temperature of the battery to ensure that the battery operates within a safe range, improving the overall performance and lifespan of the battery. In addition, the circuit board also has multiple safety protection functions, such as over - charge protection, over - discharge protection, short - circuit protection, temperature protection, etc. When an abnormal situation occurs in the battery, the circuit board can quickly cut off the circuit to prevent accidents.

[0116] In the related art, a transfer board is usually provided between a circuit board and a battery pack. The transfer board is fixedly welded to the electrode tabs of the battery cells of the battery pack, and the circuit board is arranged on the transfer board. In addition, the battery further includes a housing. After the circuit board is connected to the battery pack, the whole needs to be installed in the housing. However, since the electrode tabs are made of relatively soft material, there is an assembly gap between the circuit board and the housing. In certain situations, the battery will vibrate at different frequencies. For example, in new energy vehicles, the battery pack needs to withstand various vibrations generated during vehicle driving, such as bumps caused by uneven roads, inertial forces during acceleration and braking, etc. Another example is for fixed devices such as communication base stations and energy storage containers. Although the vibration sources are relatively few, natural disasters such as strong winds and earthquakes or nearby construction activities may still cause the battery to vibrate. At this time, the circuit board is prone to resonance, and the circuit board will drive the transfer board to displace, resulting in the failure of the connection with the battery pack. The connection failure may cause a short circuit between the electrode tabs of the battery cells or between the electrode tabs and the circuit board, leading to battery damage. In severe cases, it will trigger safety accidents such as battery overheating, fire, and even explosion, endangering personal and property safety.

[0117] In addition, as described above, in the related art, the transfer board and the battery are usually fixed only by welding the transfer board to the electrode tabs of the battery cells. However, the target of the electrode tabs is small. During the welding process, due to factors such as difficulty in accurately determining the target point, improper operation, and unstable welding conditions, some welding points may have defects such as false soldering, welding beads, and cracks, affecting the tightness of the connection. When the circuit board drives the transfer board to displace, the welding points are more likely to break, accelerating the connection failure of the battery pack. At the same time, the electrode tabs have a certain height and there are multiple electrode tabs. During the welding process, it is easy to cause uneven welding positions due to factors such as difficulty in accurately determining the target point, etc., and then there is an assembly gap between the transfer board and the battery pack. When the circuit board resonates, it is more likely to drive the transfer board to displace.

[0118] In addition, the electrode tabs of the battery cells are the contact points during battery charging and discharging, and are key components for charge transfer inside the battery. In the related art, using the electrode tabs of the battery cells as the stress points for connecting the circuit board to the battery pack may cause situations such as bending of the electrode tabs, affecting the service life of the electrode tabs and increasing the maintenance cost.

[0119] In view of this, the present application provides a battery pack and an electrical device using the same. By fixedly arranging the circuit board on the housing assembly, the assembly gap between the circuit board and the housing assembly is reduced, and the overall positions of all components are fixed, overcoming the risk of resonance of the circuit board caused by the overall vibration of the battery in the related art, avoiding the failure of the battery pack caused by resonance, improving the service life of the battery pack, and reducing potential safety hazards.

[0120] The following will be combined with Figures 1-7 to describe in detail the battery pack provided by the embodiments of the present application.

[0121] In the figure, x is the first direction, y is the third direction, and z is the second direction.

[0122] The battery pack provided in this embodiment has a battery as its primary energy supply device. The battery can be either a primary battery or a secondary battery. A primary battery is a battery that cannot be recharged and reused after discharge, while a secondary battery is a battery that can be recharged to activate the active material and continue to be used after discharge. Batteries can be categorized by the type of metal involved in the electrochemical reaction, such as lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, or other types of batteries. They can be categorized by their external shape, such as square-shell batteries and cylindrical batteries. They can be categorized by their outer shell, such as steel-shell batteries and soft-pack batteries.

[0123] Specifically, combined Figure 1 and Figure 2 The battery pack includes a shell assembly and a battery pack 200.

[0124] The housing assembly is the outer protective layer of the battery pack, primarily protecting its internal components from external physical impact, moisture intrusion, and dust contamination. For example, the housing assembly can be made of a high-strength, corrosion-resistant, and insulating material, such as aluminum alloy, stainless steel, or a composite material. The specific material can be selected based on actual needs and is not limited here.

[0125] The battery pack 200 includes multiple cells 210, which are fixedly connected to the housing assembly. The housing assembly is used to limit the position of the multiple cells 210. The battery pack 200 is the core component of the battery pack for storing electrical energy and includes multiple cells 210. The multiple cells 210 are connected in series, parallel, or series-parallel to meet the overall capacity and output power requirements of the battery pack. For example, conductive sheets, insulating gaskets, and other components may be provided between the cells 210 for connection and isolation to prevent short circuits and overheating.

[0126] The circuit board 400 is fixedly mounted on the housing assembly and electrically connected to the battery cell 210. The circuit board 400 is the control unit in the battery pack, and is mainly used to perform energy management, protection control, and communication interface for the battery pack. The circuit board 400 monitors the data of the battery cell 210 and performs real-time monitoring and adjustment on the working status of the battery pack 200 to ensure the safety and efficient operation of the battery pack 200. Exemplarily, the circuit board 400 generally includes a microprocessor, a power management module, a communication interface module, a protection circuit, and other parts. These components are integrated on one or more circuit boards 400, and are fixedly mounted on the housing assembly, and then connected to the battery pack 200 and other components through wires or connectors. Exemplarily, the connection between the circuit board 400 and the battery pack 200 can be screws, clips, or brackets, etc., which can be selected according to actual needs and are not limited here.

[0127] By fixing the circuit board 400 in the shell assembly, the assembly gap between the circuit board 400 and the shell assembly is reduced, and the overall position of each component is fixed, thereby overcoming the risk of resonance of the circuit board 400 caused by the overall vibration of the battery in related technologies, avoiding battery pack failure due to resonance, improving the life of the battery pack, and reducing safety hazards.

[0128] In some embodiments, combined Figure 1 The housing assembly includes a fixed baffle 700 and a bracket assembly 300. The fixed baffle 700 is used to fix the multiple battery cells 210. The fixed baffle 700 is mainly used to fix and position the multiple battery cells 210 in the battery pack 200, ensuring that the battery cells 210 maintain a stable arrangement and spacing inside the battery pack, thereby ensuring the overall stability of the battery pack 200. For example, the fixed baffle 700 can be made of aluminum alloy or engineering plastic, and the specific material can be selected according to actual needs and is not limited here.

[0129] In addition, the circuit board 400 is arranged on the bracket assembly 300, and the bracket assembly 300 supports and fixes the circuit board 400 to ensure the stable installation of components such as the circuit board 400 in the battery pack. For example, the bracket assembly 300 can be made of high-strength plastic, such as a mixture of polycarbonate (PC) and acrylonitrile-butadiene-styrene copolymer (S) to ensure rigidity and stability.

[0130] It can be seen that the fixed baffle 700 and the bracket assembly 300 are important components to ensure the structural stability of the battery pack. They are responsible for fixing the battery cells 210, supporting internal components and providing a mounting platform for the circuit board 400. The setting of the fixed baffle 700 and the bracket assembly 300 ensures the stability and safety of the battery pack.

[0131] In some embodiments, the battery cell 210 is provided with a tab. In the battery pack, the battery cell 210 is the core of energy storage, and the tab is a key component connecting the battery cell 210 to the external circuit. For example, the tab can be made of a material with good electrical conductivity, such as copper or copper alloy. The tab passes through one of the fixed baffle 700 and the bracket assembly 300 to be electrically connected to the circuit board 400. For example, the connection between the tab and the circuit board 400 can be achieved by welding, crimping, or connecting elements, or a combination of the above connection methods. The specific connection method can be selected according to actual needs and is not limited here. It should be noted that the opening for the tab to pass through on one of the fixed baffle 700 and the bracket assembly 300 should ensure that the tab passes smoothly while avoiding interference with other components.

[0132] It can be seen that the tab of the battery cell 210 can directly pass through the fixed baffle 700 or the bracket assembly 300 to be connected to the circuit board 400, reducing the assembly steps and complexity, ensuring the assembly efficiency, saving the space inside the battery pack, improving the space utilization rate of the battery pack, and enhancing the market competitiveness.

[0133] In some embodiments, the tab passes through the bracket assembly 300 and is electrically connected to the circuit board 400. The bracket assembly 300 is one of the main support structures inside the battery pack, providing a stable support platform for the circuit board 400. The tab is connected to the circuit board 400 by passing through the bracket assembly 300, ensuring the connection stability between the tab and the circuit board 400.

[0134] In some embodiments, in combination with Figure 1 and Figure 2 , the circuit board 400 is fixedly connected to the bracket assembly 300, and the bracket assembly 300 is fixedly connected to the fixed baffle 700. In this way, a stable overall structure is formed among the circuit board 400, the bracket assembly 300, and the fixed baffle 700, enhancing the rigidity and anti-deformation ability of the battery pack and reducing the possibility of structural damage to the battery pack caused by external factors such as vibration and impact.

[0135] In some embodiments, in combination with Figure 1 , the bracket assembly 300 includes a mounting bracket 310. The mounting bracket 310 is disposed in the accommodation cavity. The main function of the mounting bracket 310 is to provide support and fixing points for the circuit board 400 and is used to mount the circuit board 400 inside the battery pack. Exemplarily, the material of the mounting bracket 310 can be a light and high-strength material such as aluminum alloy or engineering plastic, etc., which can be specifically selected according to actual needs and is not limited here. The mounting bracket 310 is fixedly connected to the fixed baffle 700. Exemplarily, the connection manner between the two can be welding, bolt connection, etc. The fixed baffle 700 is fixedly connected to the battery cell 210, strengthening the structure of the battery pack 200 and providing additional support and protection for the battery pack 200.

[0136] Through the connection between the mounting bracket 310 and the fixed baffle 700, a stable and reliable internal structure of the battery pack can be formed, improving the overall performance and safety of the battery pack, and making the internal structure of the battery pack modular, making the assembly and maintenance processes of the battery pack clear and simplifying the assembly and maintenance processes.

[0137] In addition, the mounting bracket 310 of the present application can bear the weight of the circuit board 400 and the wire harness on the circuit board 400, preventing the wire harness from sagging or being in a taut state. Additionally, it is protected from damage by external factors such as impacts and vibrations. Furthermore, it avoids the vibrations that the circuit board 400 may experience due to external impacts on the battery, reduces possible faults and accidents of the circuit board 400, improves the safety of the battery pack, facilitates maintenance and repair personnel to quickly find the problem points, shortens the fault time, improves the repair efficiency, and enhances the stability of the battery pack.

[0138] In some embodiments, in combination with Figure 1 and Figure 2 , the bracket assembly 300 further includes a sampling device 320. The sampling device 320 is an important part of the internal structure of the battery pack, responsible for monitoring the state of the battery cells 210 inside the battery pack and transmitting the information to the circuit board 400. The sampling device 320 is disposed on the mounting bracket 310, ensuring the installation stability of the sampling device 320. Exemplarily, the fixing method can be snap connection, bolt connection, etc., and the sampling device 320 is electrically connected to the tab and the circuit board 400 respectively. Specifically, by electrically connecting to the tab and the circuit board 400 respectively, the sampling device 320 can collect parameters such as voltage, current, and temperature of the battery cell 210 in real time through the tab and transmit the data information to the circuit board 400. Subsequently, the processor, controller, etc. provided on the circuit board 400 will process and analyze the received data to achieve the management and control of the battery pack.

[0139] It can be seen that the sampling device 320 is an important component of the battery pack. Through the stable connection with the mounting bracket 310, its own installation stability is achieved. Through the electrical connection with the tab and the circuit board 400, the monitoring and management of the state of the battery cells 210 inside the battery pack are realized, ensuring convenience and high efficiency of maintenance and repair.

[0140] In some embodiments, in combination with Figure 1 and Figure 2 , the mounting bracket 310 is disposed on one side of the battery pack 200, ensuring the compactness of the internal components of the housing assembly. Specifically, in some embodiments, the mounting bracket 310 is disposed at the end of the battery cell 210 where the tab is provided. The mounting bracket 310 includes a first surface 310a facing the battery cell 210 and a second surface 310b facing away from the battery cell 210 along the second direction. The sampling device 320 is disposed on one of the first surface 310a and the second surface 310b. For example, the sampling device 320 can be disposed on the first surface 310a, or the sampling device 320 can be disposed on the second surface 310b. In this way, when the mounting bracket 310 is mounted on the battery cell 210, it will fit or abut against the end of the battery cell 210, shortening the length of the required circuit, reducing the resistance attenuation, and also providing a connection and fixing platform for the sampling device 320 and the circuit board 400, ensuring the stability of the overall structure.

[0141] Exemplarily, in combination with Figures 1 to 3 , the sampling devices 320 are all arranged on the second surface 310b, and the second surface 310b is the end face facing away from the battery cell 210. In this way, the installation surface where the mounting bracket 310 is located, that is, the end face of the battery cell 210 provided with the tabs, can be made flatter, which helps to reduce the space occupied by the sampling devices 320 at the end of the battery cell 210. At the same time, it is convenient for electrical connection and signal acquisition. Exemplarily, the sampling devices 320 may include temperature sensors, voltage sensors, etc., which are used to monitor the working state of the battery cell 210 to ensure the safety and performance of the battery pack 200.

[0142] The mounting bracket 310 is provided with avoidance holes 311 corresponding to the tabs. The tabs pass through the avoidance holes 311 and are electrically connected to the sampling devices 320. The setting of the avoidance holes 311 ensures that when the mounting bracket 310 is connected to the battery cell 210, the tabs can pass through the bracket to maintain operation without being hindered. After the tabs pass through the avoidance holes 311, they are electrically connected to the sampling devices 320 arranged on the second surface 310b. In this way, the transmission of current and signals can still be ensured on the basis of fixing the mounting bracket 310.

[0143] It can be seen that by arranging the sampling devices 320 on the second surface 310b of the mounting bracket 310 and designing the avoidance holes 311 to allow the tabs to pass through and be connected, the internal structure of the battery pack is optimized, and the space utilization rate of the battery pack is improved. The setting of the avoidance holes 311 enables the preliminary assembly of the mounting bracket 310 by passing the tabs through the avoidance holes 311 when the mounting bracket 310 is installed, simplifying the assembly process of the battery pack 200.

[0144] In some embodiments, in combination with Figure 1 , a plurality of battery cells 210 are arranged side by side in the first direction. Specifically, a plurality of battery cells 210 are arranged in a row, and the battery cells 210 in a row are parallel to each other and are connected to each other either closely or with a certain spacing. Optionally, the battery pack may be provided with multiple rows of battery cells 210, and the multiple rows are arranged horizontally spaced apart or stacked vertically.

[0145] At one end of each battery cell 210 along the second direction, two tabs with opposite polarities are provided. The two tabs are arranged at intervals along the third direction. The two tabs have opposite polarities, one is a positive tab and the other is a negative tab. The two tabs are used to realize the current transmission between the battery cell 210 and the external device of the battery cell 210. The first direction, the second direction, and the third direction are perpendicular to each other in pairs. The three-dimensional layout mode of the first direction, the second direction, and the third direction helps to efficiently arrange the battery cells 210 in a limited space to improve the energy density of the battery pack.

[0146] In some embodiments, in combination with Figures 1 to 3, the tabs of the battery pack 200 are arranged in two rows spaced along the third direction, each row includes a plurality of tabs, and the plurality of tabs in each row belong to different battery cells 210. Such an arrangement helps to optimize the current distribution inside the battery pack 200, so that the plurality of tabs transmit the electrical energy inside the battery cell 210 to the external circuit, or receive electrical energy from the external circuit. Exemplarily, the spacing between adjacent tabs in each row can be 7-14 mm.

[0147] It can be understood that when a plurality of battery cells 210 are connected in series, the polarities of any two adjacent tabs belonging to two battery cells 210 in each row are opposite; when a plurality of battery cells 210 are connected in parallel, the polarities of any two adjacent tabs belonging to two battery cells 210 in each row are the same.

[0148] The mounting bracket 310 is provided with two hole groups 312 arranged along the third direction. The two hole groups 312 are respectively adapted to the layout of the tabs. Each hole group 312 corresponds to a row of tabs. Each hole group 312 includes a plurality of avoidance holes 311 corresponding one-to-one to the tabs in each of the two rows, so as to ensure that the tabs can pass through the mounting bracket 310 smoothly, extend from one side of the first surface 310a of the mounting bracket 310 to the other side of the second surface 310b of the mounting bracket 310 through the corresponding avoidance holes 311, and be connected to the sampling device 320. Specifically, after the tabs pass through the avoidance holes 311 of the mounting bracket 310, they are electrically connected to the sampling device 320 on the second surface 310b side of the mounting bracket 310.

[0149] In this way, the space utilization between the battery pack 200 and the mounting bracket 310 is optimized, the space utilization rate in the accommodating cavity is improved, the overall volume of the battery is reduced, and the market competitiveness is enhanced. In addition, the mounting reliability of the mounting bracket 310 is also improved. By precisely designing the positions of the avoidance holes 311 and the hole groups 312, it is ensured that the tabs can be accurately connected to the sampling device 320.

[0150] In some embodiments, in combination with Figures 3 to 5, the mounting bracket 310 further includes a placement portion 313. There are multiple placement portions 313, and each placement portion 313 is located between two adjacent avoidance holes 311 along the first direction. The placement portion 313 is adapted to carry the tab. The placement portion 313 is used to accommodate and fix the sampling member 321. The sampling member 321 is disposed adjacent to the tab. Exemplarily, the shape and size of the placement portion 313 can be adaptively adjusted according to the size and shape of the sampling member 321 when manufacturing the mounting bracket 310 to ensure that the sampling member 321 can be stably mounted thereon; alternatively, the placement portion 313 can be set with a preset shape and size. Exemplarily, the number of placement portions 313 can be 11-17, the spacing between each placement portion 313 can be 11-17 mm, the width of the placement portion 313 in the first direction can be 3-9 mm, and the width of the placement portion 313 in the third direction can be 20-24 mm.

[0151] The sampling device 320 includes a plurality of sampling members 321. The sampling members 321 are disposed on the placement portion 313. Specifically, each sampling member 321 is disposed at the corresponding placement portion 313. The main function of the sampling member 321 is to monitor the electrical signals of the tab connected thereto, such as voltage, current, etc. The sampling member 321 is electrically connected to the tab on at least one side of the placement portion 313 along the first direction. It should be noted that the sampling member 321 may establish electrical connections with the tabs on one or both sides of the placement portion 313 along the first direction, specifically depending on the design requirements of the battery pack and needs to be selected according to actual requirements, which are not limited herein.

[0152] Exemplarily, the material of the sampling member 321 can be a metal such as copper or other conductive materials, which can be specifically selected according to actual requirements and are not limited herein. Exemplarily, the connection method between the sampling member 321 and the tab can be welding or conductive adhesive bonding, etc., which can be specifically selected according to actual requirements and are not limited herein.

[0153] The arrangement of the placement portion 313 and the sampling member 321 enables the sampling device 320 to be more closely integrated into the mounting bracket 310, reducing the additional space occupation and weight. In addition, by directly disposing the sampling member 321 on the placement portion 313 near the tab, a more stable electrical connection between the sampling member 321 and the tab can be achieved, and the accuracy of the electrical signal monitoring of the tab by the sampling member 321 is also ensured.

[0154] In some embodiments, in combination with Figure 4 and Figure 5, the hole group 312 is divided into a plurality of hole units 3121 arranged in sequence and at intervals along the first direction. The hole units 3121 are arranged at intervals, ensuring the reasonable utilization of the installation bracket 310 in space. In addition, the interaction between each hole unit 3121 is avoided, ensuring the stability of current flow. The hole unit 3121 includes two adjacent avoidance holes 311, and the placement portion 313 is arranged between the two adjacent avoidance holes 311 in each hole unit 3121. It can be seen that by dividing the hole group 312 into multiple hole units 3121, each sampling member 321 can be electrically connected to the tabs in the two avoidance holes 311 within its corresponding hole unit 3121 to simultaneously collect the working condition information of the two battery cells corresponding to the two tabs. Moreover, by independently setting each hole unit 3121, when maintenance or repair is required for the sampling device 320 or the tabs, it is easier to locate the specific hole unit 3121 for operation, improving the maintenance efficiency.

[0155] In some embodiments, in combination with Figure 3 and Figure 4 , a plurality of battery cells 210 are arranged in series. The arrangement order of the two tabs of two adjacent battery cells 210 is opposite along the third direction. In this way, the series connection between the battery cells 210 can be realized. Specifically, the positive tab of the first battery cell 210 is adjacent to the negative tab of the second battery cell 210, and the positive tab of the second battery cell 210 is then adjacent to the negative tab of the third battery cell 210, and so on. In this way, the current can flow out from the positive electrode of one battery cell 210, pass through the sampling member 321, and then flow into the negative electrode of the next battery cell 210, thereby realizing the series connection. Each sampling member 321 is electrically connected to two tabs with opposite polarities belonging to two battery cells 210 on both sides. Specifically, the sampling member 321 is placed between the tabs of two adjacent battery cells 210 and is electrically connected to them. Since the tabs of two adjacent battery cells 210 have opposite polarities, each sampling member 321 will be connected to two tabs with opposite polarities. In this way, the sampling member 321 can simultaneously monitor the voltage difference between two battery cells 210, and then judge the working state and performance of the battery cells 210. When a certain battery cell 210 fails or its performance deteriorates, the sampling member 321 will be able to detect abnormal voltage and transmit the signal to the circuit board 400. Then, the circuit board 400 triggers protection measures, such as disconnecting the faulty battery cell 210, restricting current output, etc., to ensure the safety and reliability of the battery pack.

[0156] In some embodiments, in combination with Figure 1 and Figure 2, a fixing structure 500 is further provided on the mounting bracket 310. The fixing structure 500 is used to fix the sampling member 321 disposed on the placement portion 313. The setting of the fixing structure 500 ensures that the sampling member 321 can be stably mounted on the placement portion 313, ensuring the reliability and safety of the battery pack during operation. Exemplarily, the fixing structure 500 may take various forms, such as a card slot, a buckle, etc., which can be specifically selected according to actual needs and are not limited herein.

[0157] In some embodiments, combined with Figures 3 to 6 , fixing structures 500 are respectively provided at both ends of each placement portion 313 along the third direction. In this way, the fixing effect of the fixing structure 500 on the sampling member 321 on the placement portion 313 is further enhanced, ensuring the installation stability of the sampling member 321. When the sampling member 321 is placed on the placement portion 313, its edge or other parts will cooperate with the fixing structure 500, and the sampling member 321 is fixed by clamping or other means.

[0158] In some embodiments, combined with Figure 3 and Figure 4 , the fixing structure 500 on at least one side of the placement portion 313 is a spring buckle 510 extending along the third direction. The spring buckle 510 has the advantages of good elasticity, convenient installation of the target member, and quick disassembly of the target member. The spring buckle 510 is in pressing fit with the surface of the sampling member 321 facing away from the placement portion 313. By designing the spring buckle 510 on both sides of the placement portion 313 along the third direction, when the sampling member 321 is placed on the placement portion 313, the spring buckle 510 will automatically spring up and be in close contact with the surface of the sampling member 321 facing away from the placement portion 313, and the fixation is achieved through the pressing action.

[0159] The pressing fit manner between the spring buckle 510 and the sampling member 321 ensures the stability and reliability of the sampling member 321 during the installation process. In addition, due to the certain elasticity of the spring buckle 510, it can adapt to the small displacement or deformation of the sampling member 321 during the installation process, so as to maintain close contact with the sampling member 321. During subsequent use, even if there is vibration or impact, under the pressing action of the spring buckle 510, the stability of the sampling member 321 can be ensured. In addition, when the sampling member 321 is installed, its end in the third direction is fixed by the spring buckle 510, and the end in the first direction faces the tab and is electrically connected to the tab, improving the rationality of the spatial layout of the spring buckle 510 design.

[0160] In some embodiments, combined with Figure 2 and Figure 3, the sampling member 321 is welded to the tab. The welded connection between the sampling member 321 and the tab ensures the connection reliability between the sampling member 321 and the tab, thereby ensuring the stability of the electron conduction path during the charging and discharging process of the battery, ensuring the normal operation of the battery, and at the same time improving the use safety of the battery.

[0161] Exemplarily, the welding method can be laser welding or high-speed impact welding, etc. Specifically, the basic principle of laser welding is to use the high energy density of the laser beam to heat the welding part, so that the sampling member 321 and the tab are combined in a molten state; high-speed impact welding is to fix one of the tab and the sampling member 321, and make the other move at high speed towards the fixed one and collide at high speed, and achieve metallurgical bonding under the high pressure of the shock wave generated by the high-speed collision. Among them, when only one side of the sampling member 321 is fixed to the tab, it can be connected by high-speed impact welding, and it can be specifically selected according to actual needs, and no limitation is made here.

[0162] In some embodiments, in combination with Figures 1 to 3 , the sampling device 320 further includes a connection wire harness 322. The connection wire harness 322 is electrically connected to the sampling member 321 and the circuit board 400 respectively. The connection wire harness 322 serves as a bridge between the sampling device 320 and the circuit board 400, and is used to transmit the electrical signal collected by the sampling member 321 to the circuit board 400.

[0163] In some embodiments, in combination with Figure 3 and Figure 4 , a wire groove 314 is further formed on the second surface 310b of the mounting bracket 310. The connection wire harness 322 is fixedly arranged in the wire groove 314. By laying and fixing the connection wire harness 322 in the wire groove 314, the disorderly distribution of the connection wire harness 322 inside the battery pack is avoided, and the safety hazards caused by problems such as cable entanglement, abrasion or short circuit are reduced. In addition, the design of the wire groove 314 also improves the overall aesthetics of the battery pack and ensures the compactness and orderliness of its internal structure. Specifically, the connection wire harness 322 is first electrically connected to the sampling member 321 to ensure stable signal transmission, and then the connection wire harness 322 is fixedly laid in the wire groove 314 of the mounting bracket 310.

[0164] In some embodiments, in combination with Figure 3 and Figure 4, the wire groove 314 may include a main groove 3141 and a plurality of branch grooves 3142 branched out from the main groove 3141. Among them, the main groove 3141 is used to accommodate and aggregate the wire harnesses 322 connecting the respective sampling components 321, and is the main part of the wire groove 314. The main groove 3141 is arranged along the arrangement direction of the battery cells 210. Exemplarily, a plurality of limiting members 3143 are provided at the main groove 3141. The limiting members 3143 can be cable ties, buckles or other fixing members, so that the connecting wire harnesses 322 are fixed in position within the wire groove 314. The specific method can be selected according to the actual situation and is not limited here.

[0165] The plurality of branch grooves 3142 respectively correspond to the placement parts 313 on the mounting bracket 310 one by one. The branch grooves 3142 are designed to match the number of the placement parts 313, ensuring that each placement part 313 can obtain the required connecting wire harness 322 through the branch grooves 3142, so as to achieve the precise connection between the sampling component 321 and the connecting wire harness 322, prevent the connecting wire harness 322 from interfering with other sampling components 321. By reasonably designing the layout and corresponding relationship of the main groove 3141 and the branch grooves 3142, it can be ensured that the connecting wire harness 322 can be smoothly laid to each placement part 313 to ensure the reasonable connection between the sampling component 321 and the circuit board 400 and ensure the normal operation of the battery pack.

[0166] In some embodiments, in combination with Figure 2 , the battery pack further includes an insulating spacer 900. The insulating spacer 900 is arranged between the end face of the battery cell 210 where the tab is provided and the first surface 310a of the mounting bracket 310. The tab passes through the insulating spacer 900. The insulating spacer 900 provides electrical insulation for the battery cell 210, avoiding the direct contact of the tab with other metal components except for connecting with the sampling component 321, preventing the current from flowing through an unexpected path, and avoiding the occurrence of short circuits that may cause damage to the battery pack or even fire and explosion. In addition, the insulating spacer 900 also provides certain structural support. The insulating spacer 900 can stably abut against the battery cell 210, avoiding the shaking or movement that may occur after the mounting bracket 310 is mounted on the battery cell 210, and ensuring the mounting stability of the mounting bracket 310.

[0167] Exemplarily, the insulating spacer 900 can be made of materials with good insulation performance and high temperature resistance, such as plastics, rubbers or ceramics, etc., to ensure that it can not only isolate electrical connections, but also maintain stable performance in high temperature environments, ensuring the safe operation of the battery pack under different working conditions.

[0168] In some embodiments, in combination with Figure 3 and Figure 4, the second surface 310b of the mounting bracket 310 is provided with a first connection structure 600, the circuit board 400 is provided with a second connection structure, and the mounting bracket 310 and the circuit board 400 are fixedly connected through the first connection structure 600 and the second connection structure. The setting of the first connection structure 600 and the second connection structure realizes the stable connection between the mounting bracket 310 and the circuit board 400, ensuring the overall stability of the device and the normal operation of the circuit board 400.

[0169] Exemplarily, the first connection structure 600 can be a card slot, a screw hole, a spring clip, a positioning pin, etc., and the second connection structure can be a clamping block, a screw hole, a clamping groove, a positioning hole, etc. The specific structure can be selected according to actual needs to achieve the fixed connection between the mounting bracket 310 and the circuit board 400, and no limitation is made here.

[0170] In some embodiments, in combination with Figure 3 and Figure 4 , the first connection structure 600 includes a stud 610. The inner side of the stud 610 is provided with a first threaded hole, and the second connection structure is formed as a second threaded hole. The first threaded hole and the second threaded hole are configured to match the thread of a fastener such as a screw. The mounting bracket 310 and the circuit board 400 are connected by the fastener passing through the first threaded hole and the second threaded hole in sequence. Specifically, the first threaded hole and the second threaded hole are arranged in alignment to jointly form a passing path for the fastener. Exemplarily, the fastener can be a screw. Exemplarily, the number of studs 610 can be 4 - 6, and the multiple studs 610 are evenly distributed on the mounting bracket 310.

[0171] When it is necessary to assemble the circuit board 400 to the mounting bracket 310, align the first threaded hole and the second threaded hole, pass the screw through the second threaded hole of the circuit board 400, and then screw it into the first threaded hole on the stud 610 of the mounting bracket 310. As the screw rotates, the thread on the screw tightly cooperates with the two threaded holes, thereby realizing the connection and fixation between the circuit board 400 and the mounting bracket 310. In this way, the stable connection between the circuit board 400 and the mounting bracket 310 can be ensured, and it is not easy to loosen. At the same time, when disassembling the circuit board 400, only the fastener needs to be loosened to achieve disassembly, improving the convenience of replacing the circuit board 400.

[0172] In some embodiments, in combination with Figure 3 and Figure 6, one end face of the stud 610 facing the circuit board 400 is provided with a positioning structure 611. The outer diameter of the positioning structure 611 is smaller than that of the stud 610, and the positioning structure 611 is also in positioning cooperation with the second threaded hole. In this way, when the circuit board 400 is installed, the positioning structure 611 can be easily inserted into the second threaded hole on the circuit board 400. Exemplarily, a shape match, such as circular, square, etc., can be provided between the end of the positioning structure 611 and the mating end face of the second threaded hole to ensure that the positioning structure 611 can accurately align and insert into the second threaded hole.

[0173] The setting of the positioning structure 611 ensures that the stud 610 can accurately insert into the second threaded hole, reduces the assembly error, improves the assembly efficiency. At the same time, the positioning structure 611 indirectly enhances the connection stability of the subsequent fasteners by ensuring the correct alignment between the stud 610 and the circuit board 400. In addition, after the positioning structure 611 of the stud 610 is inserted into the second threaded hole, the preliminary positioning between the circuit board 400 and the mounting bracket 310 can be achieved before the fastener is installed, leaving time for the installation operation of the stud 610.

[0174] In some embodiments, combined with Figure 1 , the housing assembly includes two fixed baffles 700 arranged oppositely. The fixed baffles 700 provide structural support for the battery pack 200, help the battery pack 200 resist external impacts and vibrations, and ensure the stability and safety of the battery pack 200 in the battery pack. The two fixed baffles 700 are arranged oppositely along the first direction, and the relative arrangement of the two fixed baffles 700 helps to clamp and fix the battery pack 200 from both sides. Each fixed baffle 700 includes a support portion 710. The support portions 710 of the two fixed baffles 700 are respectively located on both sides of the battery pack 200 along the first direction and are connected to each other. The two support portions 710 respectively have a pre-pressure on the battery pack 200 along the first direction towards the battery pack 200.

[0175] The fixed baffle 700 provides structural support for the battery pack 200, helps the battery pack 200 resist external impacts and vibrations, and ensures the stability and safety of the battery pack 200 in the battery pack. The two fixed baffles 700 are arranged oppositely along the first direction, and the relative arrangement of the two fixed baffles 700 helps to clamp and fix the battery pack 200 from both sides. The support portion 710 improves the heat conduction efficiency, reduces the thermal resistance, and at the same time reduces the risk of displacement or damage of the battery pack 200 caused by vibration or impact, maintaining the overall stability.

[0176] In some embodiments, combined with Figure 1, each fixed baffle 700 further includes a connecting arm 720. The connecting arms 720 are provided on both sides of the supporting part 710 along the third direction. One end of the connecting arm 720 is connected to the supporting part 710, and the other end extends along the first direction towards another fixed baffle 700 and is connected to the connecting arm 720 of the other fixed baffle 700. The two supporting parts 710 and the multiple connecting arms together form a stable framework, clamping the battery pack 200 between the two fixed baffles 700. Exemplarily, the connection manner of the two connecting arms 720 can be plugging, clamping, bolt connection, etc., which is not limited herein.

[0177] The arrangement of the connecting arms 720 ensures the stable connection between the fixed baffles 700, enabling the two supporting parts 710 to respectively have a pre-pressure on the battery pack 200 along the first direction towards the battery pack 200. The pre-pressure helps to ensure the close contact between the battery pack 200 and the internal components of the battery pack, such as the insulating spacer, etc., maintaining the overall stability.

[0178] In some embodiments, in combination with Figure 1 , Figure 2 and Figure 6 , avoiding notches 315 are respectively provided on both sides of the mounting bracket 310 along the first direction. The supporting part 710 is fitted into the avoiding notches 315 and fixedly connected to the mounting bracket 310. Through the avoiding notches 315, the supporting part 710 can be directly snapped into and locked in the preset position, ensuring the firm connection between the mounting bracket 310 and the fixed baffle 700, and realizing the effective support and fixation of the battery pack 200. Exemplarily, a chamfer or other guiding structures can also be provided at one end of the supporting part 710 facing the avoiding notches 315, so that the supporting part 710 can smoothly slide into the avoiding notches 315 during the assembly process, ensuring the installation efficiency.

[0179] In some embodiments, in combination with Figures 3 to 5 , the mounting bracket 310 further has a receiving portion 316 for receiving the connector of the battery pack. Among them, the connector of the battery pack is a key component for the electrical connection between the battery pack and external devices, such as charging devices, etc., responsible for transmitting electric energy and control signals, ensuring that the battery pack can work normally and meet the power requirements of devices such as vehicles. Exemplarily, the connector can be a new national standard connector. Exemplarily, the length of the receiving portion can be 60 - 65 mm, and the width can be 25 - 31 mm.

[0180] Specifically, the shape and size of the receiving portion 316 are designed according to the specific shape and size of the connector to ensure that the connector can be stably placed in the receiving portion 316. Exemplarily, positioning structures 611, fixing holes or card slots, etc. can also be provided on the receiving portion 316 to facilitate the installation and positioning of the connector.

[0181] The accommodating part 316 has certain protection and isolation functions to prevent the connector from being affected by external impacts, vibrations, etc., avoid crosstalk of the connector and interference with other components. In addition, by arranging the accommodating part 316 on the mounting bracket 310, the connector and other components such as the battery pack 200 are integrated together, improving the compactness of the battery pack, simplifying the internal wiring of the battery pack, ensuring the neatness of the wiring, and reducing the assembly and maintenance difficulties.

[0182] In some embodiments, in combination with Figures 3 to 5 , the mounting bracket 310 is further provided with a mounting part 318 for accommodating the wireless communication component of the battery pack. Exemplarily, the wireless communication component can be Bluetooth. Specifically, the shape and size of the mounting part 318 are designed according to the specific shape and size of the wireless communication component to ensure that the wireless communication component can be stably placed in the mounting part 318. Exemplarily, the mounting part 318 can also be provided with a positioning structure 611, fixing holes or card slots, etc., to facilitate the installation and positioning of the wireless communication component. Exemplarily, the length of the mounting part 318 can be 56 - 62 mm, and the width can be 15 - 20 mm.

[0183] The setting of the mounting part 318 ensures the stable installation of the wireless communication component on the battery pack, realizes the wireless communication function between the battery pack and external devices such as smartphones and vehicle-mounted systems, improves the intelligent level of the battery pack, facilitates the user to remotely monitor the status and parameter adjustment of the battery pack, etc. In addition, the mounting part 318 has certain protection and isolation functions to prevent the wireless communication component from being affected by external impacts, vibrations, etc., avoid crosstalk of the wireless communication component and interference with other components. At the same time, the setting of the mounting part 318 integrates the wireless communication component and other components such as the battery pack 200 together, improves the compactness of the battery pack, simplifies the internal wiring of the battery pack, ensures the neatness of the wiring, and reduces the assembly and maintenance difficulties.

[0184] In some embodiments, the accommodating part 316 and the mounting part 318 are integrally formed with the mounting bracket 310. The integrally formed design makes the connection between the accommodating part 316, the mounting part 318 and the mounting bracket 310 more firm, reduces the looseness or vibration problems caused by the assembly gaps between components. In addition, the integrally formed design combines multiple components into one whole, reduces the number of components, and lowers the assembly cost.

[0185] In addition, in some embodiments, in combination with Figures 3 to 6, a plurality of first mounting holes 331 are formed in the mounting bracket 310. The plurality of first mounting holes 331 are evenly arranged. Corresponding to the end of the fixing baffle 700 facing the mounting bracket 310, a plurality of second mounting holes are formed. Threads are formed on the inner walls of the first mounting holes 331 and the second mounting holes. The mounting bracket 310 and the fixing baffle 700 are connected by fixing members passing through the first mounting holes 331 and the second mounting holes in sequence.

[0186] Exemplarily, the fixing member can be a bolt. During the process of tightening the fixing member, the frictional force between the fixing member and the threaded hole gradually increases until a predetermined tightening torque is reached, realizing a firm connection between the mounting bracket 310 and the fixing baffle 700. Further, a firm connection between the mounting bracket 310 and the battery pack 200 is ensured.

[0187] In some embodiments, in combination with Figures 3 to 6 , an avoidance channel 319 for the fixing member to pass through is further provided on the mounting bracket 310 along the second direction. The avoidance channel 319 is arranged on the peripheral wall of the mounting bracket 310. There are a plurality of avoidance channels 319 and they correspond to the first mounting holes 331 one by one. Exemplarily, the avoidance channel 319 can be in a groove shape or a hole shape. The avoidance channel 319 provides a path for the fixing member to pass through, avoiding interference between the fixing member and the mounting bracket 310 during the installation process, so as to fix the mounting bracket 310 in place during the installation process, and ensuring the connection firmness between the mounting bracket 310 and the battery pack 200.

[0188] In some embodiments, in combination with Figure 7 , the battery pack further includes a housing 100. The housing 100 is the external structure of the bracket assembly 300. It defines an accommodation cavity inside the battery pack. The accommodation cavity is used to accommodate the battery cells 210, the circuit board 400, the mounting bracket 310 and other internal components of the battery pack. The housing 100 provides physical protection to prevent external impacts and damages, and also plays a role in dust prevention. Exemplarily, the housing 100 can be made of a strong and durable material, such as metal or high-strength plastic, etc., which can be specifically selected according to actual needs and is not limited here. Exemplarily, the housing 100 can be provided with connection interfaces, fixing holes, etc. to connect with the battery pack or other external devices. In addition, in order to ensure its own heat dissipation performance, the housing 100 may also be provided with heat dissipation holes, ventilation channels, etc.

[0189] The housing 100 includes a bottom case 110 and an upper cover 120. The bottom case 110 serves as the foundation of the entire housing 100, which is used to support and fix internal components. Exemplarily, the bottom case 110 is usually also provided with a USB interface, a charging port, etc. to achieve electrical connection between the inside of the battery and the external environment. One end of the bottom case 110 is open to facilitate the installation and removal of the internal components installed in the accommodation cavity. The upper cover 120 is covered on the opening and connected to the bottom case 110. The upper cover 120 and the bottom case 110 jointly define a closed or semi-closed accommodation cavity. Exemplarily, the upper cover 120 is usually also provided with an opening for heat dissipation and an interface for user-device interaction, such as a touch screen, buttons, etc. Of course, the components in the above examples can still be interchangeably arranged, that is, the USB interface, the charging port, etc. can be arranged on the upper cover 120, and the heat dissipation opening and the interaction interface, etc. can be arranged on the bottom case 110, which is not limited here. The cooperation between the bottom case 110 and the upper cover 120 provides a safe and stable working environment for the components inside the battery.

[0190] In some embodiments, in combination with Figure 7 , the bottom case 110 has a first connecting edge 111. The first connecting plate is at least part of the edge of the bottom case 110. The upper cover 120 is provided with a second connecting edge, and the second connecting edge is at least part of the edge of the upper cover 120. The first connecting edge 111 and the second connecting edge are connected to each other. Exemplarily, the connection manner between the first connecting edge 111 and the second connecting edge can be sleeving, snap connection, bolt connection, bonding, etc., or a combination of multiple connection methods, which is specifically selected according to actual needs and is not limited here. The connection between the first connecting edge 111 and the second connecting edge ensures the cooperation between the bottom case 110 and the upper cover 120 to jointly form a closed or semi-closed accommodation cavity to accommodate internal components, ensuring the protection of the internal components and guaranteeing the integrity of the battery pack structure.

[0191] In some embodiments, one of the first connecting edge 111 and the second connecting edge is sleeved on the outside of the other. Exemplarily, in combination with Figure 7 , the first connecting edge 111 is sleeved on the outside of the second connecting edge. The sleeving method ensures the pre-assembly of the bottom case 110 and the upper cover 120 before installing the fastening connector 130. The first connecting edge 111 is provided with a first fixing hole, and the second connecting edge is provided with a second fixing hole. The housing 100 further includes a fastening connector 130. The fastening connector 130 passes through the first fixing hole and the second fixing hole to connect the first connecting edge 111 and the second connecting edge. Exemplarily, the fastening connector 130 can be a screw, a bolt, a buckle, etc., which is used to further strengthen the connection between the first connecting edge 111 and the second connecting edge. The fastening connector 130 passes through the first fixing hole and the second fixing hole and firmly connects the bottom case 110 and the upper cover 120 by means of threaded connection, locking or clamping, etc.

[0192] In addition, the first fixing holes, the second fixing holes and the fastening connectors 130 are in one-to-one correspondence and can each be provided in multiple numbers to enhance the uniformity of the connection between the bottom case 110 and the upper cover 120. A plurality of avoiding grooves 317 corresponding to the fastening connectors 130 one by one are provided on the peripheral side of the mounting bracket 310. Specifically, the avoiding grooves 317 are opened on at least two opposite sides of the mounting bracket 310, and the fastening connectors 130 are located in the avoiding grooves 317. For example, the avoiding grooves 317 are opened on two opposite sides of the mounting bracket 310 along the first direction, so as to facilitate the connection between the two opposite sides of the bottom case 110 and the upper cover 120 along the first direction through the fastening connectors 130; and / or, the avoiding grooves 317 are opened on two opposite sides of the mounting bracket 310 along the third direction, so as to facilitate the connection between the two opposite sides of the bottom case 110 and the upper cover 120 along the third direction through the fastening connectors 130. The avoiding grooves 317 provide sufficient space for the fastening connectors 130 to ensure that they can smoothly pass through the first fixing holes and the second fixing holes, and avoid interference with the mounting bracket 310, ensuring the installation stability of the fastening connectors 130.

[0193] In some embodiments, in combination with Figure 1 and Figure 2 , the housing 100 further includes a sealing ring 800. The sealing ring 800 is disposed between the first connecting edge 111 and the second connecting edge to seal the gap between the upper cover 120 and the bottom case 110. Specifically, the sealing ring 800 ensures the sealing performance between the upper cover 120 and the bottom case 110 through its own elasticity and sealing performance, preventing the exchange of impurities such as liquid, gas or dust between the inside of the battery pack and the external environment, and avoiding damage to the battery module and other internal components in the accommodating cavity. Exemplarily, the material of the sealing ring 800 can be rubber, silica gel or other elastic materials, and can be specifically selected according to actual needs, which is not limited herein.

[0194] In some embodiments, in combination with Figure 1 and Figure 2 , the second connecting edge includes a mounting outer edge for mounting the sealing ring 800. The mounting outer edge surrounds the upper cover 120 for one week. In this way, the sealing effect of the sealing ring 800 on the entire opening on the upper cover 120 can be ensured. The sealing ring 800 is fixed to the second connecting edge. Exemplarily, when the sealing ring 800 is mounted on the mounting outer edge, an interference fit method can be adopted. Specifically, the size of the sealing ring 800 is slightly larger or smaller than the size of the mounting outer edge, and the tight fit between the sealing ring 800 and the upper cover 120 is realized by extruding the sealing ring 800. In addition, exemplarily, the fixing method between the sealing ring 800 and the mounting outer edge can also be adhesion, snap fit, card slot, bolt, etc., and can be specifically selected according to actual needs, which is not limited herein.

[0195] In this way, by designing and installing the outer edge and fixing the sealing ring 800, the gap between the upper cover 120 and the bottom shell 110 is ensured to be sealed, which helps to prevent impurities in the external environment from entering the interior of the battery pack and also maintains the stability and safety of the internal environment of the battery pack.

[0196] In some embodiments, in combination with Figure 1 and Figure 2 , the circumferential wall of the sealing ring 800 is further provided with through holes 810. The through holes 810 correspond one-to-one with the first fixing holes and the second fixing holes, that is, corresponding through holes 810 are designed at the positions where each fastening connector 130 needs to pass through. The fastening connector 130 also passes through the through holes 810. In this way, it is ensured that while the fastening connector 130 connects the bottom shell 110 and the upper cover 120, it can also pass through the sealing ring 800 through the through holes 810 without damaging the integrity and sealing performance of the sealing ring 800. The fastening connector 130 passes through the through holes 810 and cooperates with the first fixing holes and the second fixing holes, and also forms a stable connection structure, ensuring the stability of the sealing ring 800 during the connection process and avoiding seal failure caused by loose connection.

[0197] In some embodiments, in combination with Figure 1 and Figure 2 , the side of the sealing ring 800 facing the upper cover 120 is further provided with a plurality of positioning protrusions 820. The positioning protrusions 820 are in positioning cooperation with the upper cover 120. The setting of the positioning protrusions 820 ensures that the sealing ring 800 can be accurately positioned to the preset position during the installation process, avoiding poor sealing caused by deviation or misalignment. Moreover, the setting of the positioning protrusions 820 provides an assembly mark for the assembler, simplifies the assembly process, and improves the assembly efficiency and accuracy.

[0198] In some embodiments, in combination with Figure 1 and Figure 2 , the positioning protrusions 820 and the through holes 810 are opposite in the second direction. The positioning protrusions 820 are positioned and fitted in the avoidance groove. By fitting the positioning protrusions 820 in the avoidance groove, a firm connection is formed between the sealing ring 800 and the mounting bracket. In this way, the installation stability of the sealing ring 800 is further increased, and the sealing ring 800 is prevented from loosening or falling off due to factors such as vibration and impact during use.

[0199] In some embodiments, in combination with Figure 1 , Figure 2 and Figure 7, a fixing groove is also provided on the peripheral edge of the upper cover 120, an extension portion 830 is provided on the peripheral edge of the sealing ring 800, and the extension portion 830 is fixedly arranged in the fixing groove. The setting of the fixing groove provides a stable support and fixing point for the extension portion 830, ensuring that the sealing ring 800 can be firmly installed on the housing 100, so that the sealing ring 800 is not easily displaced or detached. Exemplarily, the fixing method of the extension portion 830 and the sealing ring 800 can be bonding, bolt fixing, etc. The extension portion 830 is provided with a glue injection hole, and the glue injection hole is used to inject connecting glue between the extension portion 830 and the inner wall of the fixing groove.

[0200] Specifically, the number and position of the glue injection holes can be designed according to actual needs to ensure that the connecting glue can evenly fill the contact surface between the extension portion 830 and the fixing groove.

[0201] It can be seen that the cooperation of the fixing groove and the extension portion 830 and the injection of the connecting glue improve the fixing effect of the sealing ring 800, making the sealing ring 800 more firmly installed on the housing 100, not easily displaced or detached, and ensuring the installation stability of the sealing ring 800.

[0202] In some embodiments, the mounting bracket 310 is a plastic part.

[0203] In addition, this embodiment also provides an electrical device, which can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The embodiments of the present application do not limit the electrical device.

[0204] The electrical device of this embodiment may include an electrical device and the battery pack in the above embodiment. Among them, the electrical device may be provided with a battery compartment, the battery compartment may be provided with a power supply interface, and the battery may be arranged in the battery compartment and electrically connected to the power supply interface to supply power to the electrical device.

[0205] The electrical device of this embodiment can be a vehicle or an energy storage device. The vehicle can be a New Energy Vehicle, such as a Pure Electric Vehicle (PEV / BEV), a Range Extended Electric Vehicle (REEV), a Hybrid Electric Vehicle (HEV), a Fuel Cell Electric Vehicle. The vehicle can also be an electric two-wheeler, an electric three-wheeler or any other vehicle with a battery.

[0206] According to the electrical equipment of the embodiments of the present application, by fixedly arranging the circuit board 400 in the housing assembly, the assembly gap between the circuit board 400 and the housing assembly is reduced, the overall positions of the components are fixed, the resonance risk of the circuit board 400 caused by the overall vibration of the battery in the related art is overcome, the failure of the battery pack caused by resonance is avoided, the service life of the battery pack is improved, and the potential safety hazard is reduced.

[0207] In this specification, the embodiments or implementation manners are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0208] It should be noted that the embodiments referred to as "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. in the specification may include specific features, structures or characteristics, but not necessarily each embodiment includes such specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining a specific feature, structure or characteristic with an embodiment, implementing such a feature, structure or characteristic in combination with other embodiments, whether explicitly or implicitly described, is within the knowledge scope of those skilled in the art.

[0209] Generally speaking, terms should be understood at least in part by their use in the context. For example, at least in part according to the context, the term "one or more" used in the text can be used to describe any feature, structure or characteristic in the sense of a singular, or can be used to describe a combination of features, structures or characteristics in the sense of a plural. Similarly, at least in part according to the context, terms such as "a" or "the" can also be understood to convey a singular usage or a plural usage.

[0210] It should be easily understood that the terms "on...", "above...", and "over..." in this disclosure should be interpreted in the broadest way, so that "on..." not only means "directly on something", but also includes the meaning of "on something" with intermediate features or layers therebetween, and "above..." or "over..." not only includes the meaning of "above or over something", but also can include the meaning of "above or over something" without intermediate features or layers therebetween (i.e., directly on something).

[0211] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that, Comprising: A housing assembly; A battery pack (200) disposed in the housing assembly, the battery pack (200) including a plurality of battery cells (210), and the housing assembly being adapted to limit the plurality of battery cells (210); A circuit board (400) fixedly disposed on the housing assembly and electrically connected to the battery cells (210).

2. The battery pack according to claim 1, characterized in that, The housing assembly includes: A fixed baffle (700) for restricting the movement of the battery pack (200); A bracket assembly (300) fixedly connected to the fixed baffle (700).

3. The battery pack according to claim 2, wherein The battery cell (210) is provided with tabs, and the tabs pass through the housing assembly and are electrically connected to the circuit board (400).

4. The battery pack according to claim 3, wherein, The tabs pass through the bracket assembly (300) and are electrically connected to the circuit board.

5. The battery pack according to claim 4, characterized in that, The circuit board is fixedly connected to the bracket assembly (300).

6. The battery pack according to claim 5, characterized in that, The bracket assembly (300) includes: A mounting bracket (310) fixedly connected to the fixed baffle (700).

7. The battery pack according to claim 6, characterized in that, The bracket assembly further includes a sampling device (320) disposed on the mounting bracket (310) and adapted to be electrically connected to the tabs and the circuit board (400) respectively.

8. The battery pack according to claim 7, wherein The mounting bracket is disposed on one side of the battery pack (200).

9. The battery pack according to claim 8, wherein, The mounting bracket (310) includes a first surface (310a) facing the battery cell (210) and a second surface (310b) facing away from the battery cell (210), and the sampling device (320) is disposed on one of the first surface (310a) and the second surface (310b).

10. The battery pack according to claim 9, characterized in that, The sampling device (320) is disposed on the second surface (310b); The mounting bracket (310) is provided with a relief hole (311) for the tabs to pass through; The tabs are adapted to pass through the relief hole (311) and be electrically connected to the sampling device (320).

11. The battery pack according to claim 10, characterized in that, The mounting bracket (310) is provided with two hole groups (312) arranged in a third direction, and each hole group (312) includes a plurality of the relief holes (311).

12. The battery pack according to claim 11, characterized in that, The mounting bracket (310) includes a plurality of placement portions (313), and the placement portions (313) are located between two adjacent relief holes (311) and are adapted to carry the tabs; The sampling device (320) includes a plurality of sampling members (321), and the sampling members (321) are disposed on the placement portions (313) and are electrically connected to the tabs on at least one side of the placement portions (313).

13. The battery pack according to claim 12, characterized in that, The hole groups (312) are divided into a plurality of hole units (3121) arranged in sequence and spaced apart in a first direction, the hole units (3121) include two adjacent relief holes (311), and the placement portions (313) are disposed between the two adjacent relief holes (311) in each hole unit (3121).

14. The battery pack according to claim 13, wherein, Each sampling member (321) is electrically connected to two tabs with opposite polarities belonging to two battery cells (210) on both sides; A plurality of the battery cells (210) are arranged in series, and the arrangement orders of the two tab ears of two adjacent battery cells (210) in the third direction are opposite.

15. The battery pack according to claim 12, wherein, The mounting bracket (310) is further provided with a fixing structure (500), and the fixing structure (500) is used to fix the sampling member (321) disposed on the placement portion (313).

16. The battery pack according to claim 15, characterized in that, The fixing structure (500) is respectively provided at both ends of each placement portion (313) in the third direction.

17. The battery pack according to claim 15, characterized in that, The fixing structure (500) on at least one side of the placement portion (313) is a snap button (510) extending in the third direction, and the snap button (510) is in pressing fit with the surface of the sampling member (321) facing away from the placement portion (313).

18. The battery pack according to any one of claims 11-14, characterized in that, A plurality of the battery cells (210) are arranged side by side in the first direction, and two tab ears with opposite polarities are provided at one end of each battery cell (210) in the second direction, and the two tab ears are arranged at intervals in the third direction.

19. The battery pack according to claim 18, characterized in that, The first direction, the second direction and the third direction are perpendicular to each other in pairs.

20. The battery pack according to claim 18, characterized in that, The tab ears in the battery pack (200) are arranged in two rows at intervals in the third direction, and each row includes a plurality of tab ears corresponding to the avoidance holes (311) belonging to the same hole group (312) one by one. The tab ears extend from one side of the first surface (310a) of the mounting bracket (310) to the other side of the second surface (310b) of the mounting bracket (310) through the corresponding avoidance holes (311) to be connected to the sampling device (320).

21. The battery pack according to any one of claims 12-17, characterized in that, The sampling member (321) is connected to the tab ear by welding.

22. The battery pack according to claim 21, wherein, The sampling device (320) further includes: a connection wire harness (322), and the connection wire harness (322) is electrically connected to the sampling member (321) and the circuit board (400) respectively.

23. The battery pack according to claim 22, characterized in that, The mounting bracket (310) is further provided with a wire groove (314), and the connection wire harness (322) is fixedly arranged in the wire groove (314).

24. The battery pack according to claim 22, characterized in that, The second surface (310b) of the mounting bracket (310) is provided with a wire groove (314), and the connection wire harness (322) is fixedly arranged in the wire groove (314).

25. The battery pack according to any one of claims 6-17, characterized in that, The battery pack further includes: an insulating spacer (900), and the insulating spacer (900) is disposed between the end face of the battery cell (210) where the tab ear is provided and the first surface (310a) of the mounting bracket (310), and the tab ear passes through the insulating spacer (900).

26. The battery pack according to any one of claims 6-17, characterized in that, The second surface (310b) of the mounting bracket (310) is provided with a first connection structure (600), the circuit board (400) is provided with a second connection structure, and the first connection structure (600) of the mounting bracket (310) is fixedly connected to the second connection structure of the circuit board (400).

27. The battery pack according to claim 26, characterized in that, The first connection structure (600) includes a stud (610). A first threaded hole is provided inside the stud (610). The second connection structure is formed as a second threaded hole. The mounting bracket (310) and the circuit board (400) are connected by a fastener that sequentially passes through the first threaded hole and the second threaded hole.

28. The battery pack according to claim 27, wherein One end face of the stud (610) facing the circuit board (400) is provided with a positioning structure (611). The outer diameter of the positioning structure (611) is smaller than the outer diameter of the stud (610). The positioning structure (611) is also in positioning cooperation with the second threaded hole.

29. The battery pack according to any one of claims 6-17, characterized in that, The housing assembly includes two of the fixed baffles (700) arranged oppositely. Each of the fixed baffles (700) includes a support portion (710) and a connecting arm (720). The connecting arms (720) are provided on both sides of the support portion (710) along the third direction. One end of the connecting arm (720) is connected to the support portion (710), and the other end extends along the first direction towards the other fixed baffle (700) and is connected to the connecting arm (720) of the other fixed baffle (700).

30. The battery pack according to claim 29, characterized in that, The support portions (710) of the two fixed baffles (700) are respectively located on both sides of the battery pack (200) along the first direction. The two support portions (710) respectively have a pre-pressure on the battery pack (200) along the first direction towards the battery pack (200).

31. The battery pack according to claim 29, wherein, Avoidance notches (315) are respectively provided on both sides of the mounting bracket (310) along the first direction. The support portion (710) is fitted into the avoidance notch (315) and is fixedly connected to the mounting bracket (310).

32. The battery pack according to any one of claims 6-17, characterized in that, The mounting bracket (310) is further provided with a receiving portion (316) for receiving the connector of the battery pack.

33. The battery pack according to any one of claims 6-17, characterized in that, The battery pack further includes a housing (100), and the housing (100) includes: A bottom case (110) and an upper cover (120). One end of the bottom case (110) is open. The upper cover (120) is covered on the opening and is connected to the bottom case (110). The upper cover (120) and the bottom case (110) jointly define a receiving cavity suitable for receiving the housing assembly, the battery pack (200), and the circuit board (400).

34. The battery pack according to claim 33, characterized in that, The bottom case (110) has a first connecting edge (111), and the upper cover (120) is provided with a second connecting edge. The first connecting edge (111) and the second connecting edge are connected to each other.

35. The battery pack according to claim 34, wherein One of the first connecting edge (111) and the second connecting edge is sleeved outside the other; The first connecting edge (111) is provided with a first fixing hole, and the second connecting edge is provided with a second fixing hole. The housing (100) further includes a fastening connector (130). The fastening connector (130) passes through the first fixing hole and the second fixing hole to connect the first connecting edge (111) and the second connecting edge; An avoidance groove (317) is provided on the peripheral side of the mounting bracket (310), and the fastening connecting piece (130) is located in the avoidance groove (317).

36. The battery pack according to claim 35, characterized in that, The housing (100) further includes: a sealing ring (800), which is arranged between the first connecting edge (111) and the second connecting edge to seal the gap between the upper cover (120) and the bottom shell (110).

37. The battery pack according to claim 36, wherein, The second connecting edge includes a mounting outer edge for mounting the sealing ring (800). The mounting outer edge surrounds the upper cover (120) for one week, and the sealing ring (800) is fixed to the second connecting edge.

38. The battery pack according to claim 36, wherein, A through hole (810) is further provided on the peripheral wall of the sealing ring (800). The through hole (810) corresponds to the first fixing hole and the second fixing hole one by one, and the fastening connecting piece also passes through the through hole (810).

39. The battery pack according to claim 38, characterized in that, A plurality of positioning convex portions (820) are further provided on the side of the sealing ring (800) facing the upper cover (120), and the positioning convex portions (820) are in positioning cooperation with the upper cover (120).

40. The battery pack according to claim 39, characterized in that, The positioning convex portion is opposite to the through hole (810) in the second direction, and the positioning convex portion is positioned and fitted in the avoidance groove (317).

41. The battery pack according to claim 36, characterized in that, A fixing groove is further provided on the peripheral edge of the upper cover (120). An extension portion (830) is provided on the peripheral edge of the sealing ring (800). The extension portion (830) is fixedly arranged in the fixing groove. A glue injection hole is provided on the extension portion (830) for injecting connecting glue between the extension portion (830) and the inner wall of the fixing groove.

42. The battery pack according to any one of claims 6-17, characterized in that, The mounting bracket (310) is a plastic part.

43. An electrical device, characterized in that, Including the battery pack according to any one of claims 1-42.

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