Battery assembly, battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery assembly, a battery pack and electric equipment. The battery assembly comprises a battery, a battery frame and a restraining structure; at least part of the plurality of batteries are accommodated in the battery frame; the restraining structure comprises a restraining pressing plate and a connecting support, the connecting support is connected to the battery frame, and the restraining pressing plate at least partially wraps the outer side of the battery and is connected to the connecting support; the restraining pressing plate, the connecting support and the battery frame are sequentially connected in the first direction. In the battery assembly provided by the embodiment of the invention, the battery is crimped and fixed along the first direction through the restraining structure, so that when the battery expands along the first direction, the connection strength among the restraining pressing plate, the connecting bracket and the battery frame can be effectively ensured, and the generation of fatigue shearing force is avoided; and expansion force generated in the charging and discharging process of the battery is dispersed through the restraining pressing plate, so that the overall reliability of the battery assembly is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery assembly, a battery pack and an electric device. BACKGROUND

[0002] With the rapid development of electric vehicles and energy storage systems, the safety, reliability and maintainability of battery packs have become the focus of the industry. In the current battery pack design, the safety restraint method of the battery module is mainly to use metal panels to be fastened by screws or fixed by steel rings.

[0003] These traditional restraint methods have solved the problem of fixing the battery module to some extent, but there are still a series of technical problems. The battery module will expand and contract during charging and discharging, causing the volume of the battery module to change. The traditional screw fastening method is perpendicular to the expansion direction of the module, which is easy to cause fatigue shear force, resulting in loosening or even breaking of the screw, and the reliability is poor. This not only affects the overall performance of the battery pack, but also causes safety hazards.

[0004] Therefore, it is necessary to improve the above problems to change the current situation. CONTENT OF THE INVENTION

[0005] The present application provides a battery assembly, a battery pack and an electric device, which are used to solve the problem of poor reliability of the battery pack restraint scheme in the prior art.

[0006] The first aspect of the present application provides a battery assembly, comprising:

[0007] a plurality of batteries arranged along a first direction and a battery frame, at least part of the plurality of batteries being accommodated in the battery frame;

[0008] a restraint structure comprising a restraint pressing plate and a connecting bracket, the connecting bracket being connected to the battery frame, and the restraint pressing plate being at least partially wrapped on the outer side of the battery and connected to the connecting bracket; wherein the restraint pressing plate, the connecting bracket and the battery frame are connected in sequence along the first direction.

[0009] In a possible implementation manner, the restraint pressing plate comprises a pressing portion and at least two connecting portions, the at least two connecting portions are respectively connected to the pressing portion, the pressing portion is pressed on the outer side of the battery in the first direction, and the at least two connecting portions are located on the side surface of the battery and are respectively connected to the connecting bracket.

[0010] In a possible implementation manner, the number of the connecting brackets is at least two, and the at least two connecting brackets are correspondingly arranged with the at least two connecting portions.

[0011] In a possible implementation, the at least two connection portions are a first connection portion and a second connection portion, and the first connection portion and the second connection portion are connected to opposite sides of the crimping portion, respectively; and the first connection portion is provided with a relief groove.

[0012] In a possible implementation, the battery assembly further comprises at least two first fasteners, the restraint pressing plate is connected to the connection support through the first fasteners, and the first fasteners extend in the first direction in the axial direction.

[0013] The connection support is provided with a first fixing hole and a second fixing hole, wherein the first fastener is connected to one of the connection portions through the first fixing hole, and the other first fastener is connected to the other connection portion through the second fixing hole.

[0014] In a possible implementation, the restraint pressing plate further comprises a reinforcing rib, and the reinforcing rib is connected to the crimping portion and the connection portion, respectively.

[0015] In a possible implementation, the restraint pressing plate is at least partially wrapped on the outside of the battery frame.

[0016] In a possible implementation, the battery frame comprises an end plate and a side plate, the end plate is connected to the side plate, and the end plate and the side plate enclose a space for accommodating the battery; the restraint pressing plate is at least partially crimped on the outside of the end plate and the side plate, respectively; and the connection support is located on the side of the side plate away from the battery.

[0017] In a possible implementation, the side of the side plate away from the battery is provided with a mounting portion, and the connection support is connected to the mounting portion.

[0018] In a possible implementation, the side of the side plate away from the battery is provided with a lifting hook.

[0019] The second aspect of the present application provides a battery pack, comprising:

[0020] a tray; and

[0021] The battery assembly as described in any one of the above is accommodated in the tray.

[0022] In a possible implementation, the battery assembly is connected to the tray through the restraint structure.

[0023] In a possible implementation, the restraint structure, the battery frame, and the tray are sequentially arranged in the first direction, and the connection support is located on the outside of the battery and connected to the restraint structure and the tray, respectively.

[0024] In a possible implementation, the battery assembly further comprises a first fastener and a second fastener, the connecting bracket is provided with a fixing hole and a connecting hole, the first fastener is connected to the battery frame and the connecting bracket respectively through the fixing hole, and the second fastener is connected to the battery frame and the tray respectively through the connecting hole.

[0025] In a possible implementation, the connecting bracket comprises an intermediate portion and a fixing portion, the fixing hole is arranged on the intermediate portion, and the connecting hole is arranged on the fixing portion; in the first direction, the fixing portion is arranged in abutment with the mounting portion of the battery frame, the intermediate portion is connected to an end portion of the fixing portion, and the intermediate portion and the fixing portion are arranged in sequence along the first direction.

[0026] In a possible implementation, the number of the fixing holes is a plurality, and the plurality of fixing holes are arranged in a straight line on the intermediate portion.

[0027] The third aspect of the present application provides a power utilization device, comprising:

[0028] a power utilization device; and

[0029] The battery assembly according to any one of the preceding aspects, or the battery pack according to any one of the preceding aspects, wherein the battery assembly is electrically connected to the power utilization device.

[0030] The embodiments of the present application have the following beneficial effects:

[0031] In the battery assembly of the present embodiment, the battery is fixed by the restraint structure along the first direction, so that the connection strength between the restraint pressing plate, the connecting bracket and the battery frame can be effectively ensured when the battery expands along the first direction, the generation of fatigue shear force is avoided, and the expansion force generated in the charging and discharging process of the battery is dispersed through the restraint pressing plate, thereby improving the overall reliability of the battery assembly. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A perspective view of a battery pack in an embodiment of the present application is shown;

[0033] Figure 2 An enlarged view of a partial A is shown; Figure 1 An enlarged view of a partial B is shown;

[0034] Figure 3 A combined structure schematic view of a battery assembly and a restraint structure in an embodiment of the present application is shown;

[0035] Figure 4 An enlarged view of a partial A is shown; Figure 3 An enlarged view of a partial B is shown;

[0036] Figure 5 A perspective view of the restraint pressing plate in the embodiment of the utility model is shown;

[0037] Figure 6 A plan view of the restraint pressing plate in the embodiment of the utility model is shown;

[0038] Figure 7 A perspective view of the connecting support in some embodiments of the utility model is shown;

[0039] Figure 8 A plan view of the battery pack in the embodiment of the utility model is shown;

[0040] Figure 9 A plan view of the battery pack in the embodiment of the utility model is shown; Figure 8 An enlarged view of part C is shown;

[0041] Figure 10 A plan view of part of the structure of the battery pack in the embodiment of the utility model is shown;

[0042] Reference signs:

[0043] 10 - battery pack;

[0044] 100 - battery assembly; 110 - battery; 120 - battery frame; 121 - end plate; 122 - side plate;

[0045] 1221 - mounting portion; 1222 - hoisting hook; 130 - restraint structure; 131 - restraint pressing plate; 1311 - pressure bonding portion; 1312 - connecting portion; 13121 - first connecting portion; 131211 - avoiding groove; 13122 - second connecting portion; 1313 - reinforcing rib; 132 - connecting support; 1321 - intermediate portion; 13211 - first fixing hole; 13212 - second fixing hole; 1322 - fixed portion; 13221 - connecting hole; 140 - first fastener; 150 - second fastener;

[0046] 200 - tray. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application but not 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 work fall within the scope of protection of the present application.

[0048] With the rapid development of electric vehicles and energy storage systems, the safety, reliability and maintainability of battery packs have become the focus of the industry. In the current battery pack design, the safety restraint method of the battery module is to use metal panels to fix through screws or steel rings. These traditional restraint methods have solved the problem of fixing the battery module to a certain extent, but there are also a series of technical problems.

[0049] The battery module will expand and contract during charging and discharging, causing the volume of the battery module to change. The traditional screw fastening method, because its fixed direction is perpendicular to the expansion direction of the module, is prone to fatigue shear force, which can cause the screw to loosen or even break, resulting in poor reliability. This not only affects the overall performance of the battery pack, but also causes safety hazards.

[0050] In addition, the battery module on the market currently has its module expansion force direction perpendicular to the up and down screw direction of the side panel, and is subject to fatigue shear force caused by the repeated expansion and contraction of the battery cell. In addition, the battery pack has a complex use scenario and strong mechanical vibration, and the screw and the flange surface of the panel are prone to structural failure and cracking, which can generate metal debris and easily cause the battery pack to malfunction, and in severe cases, cause safety accidents. In addition, the steel ring restraint method has the problems of inconvenient assembly and disassembly, complex installation of liquid cooling solutions, low efficiency, high cost, etc.

[0051] Based on this, referring to Figures 1 to 10 The utility model embodiment provides a battery assembly 100, which comprises a plurality of battery 110 arranged along a first direction and a battery frame 120 and a restraint structure 130; at least part of the plurality of battery 110 is accommodated in the battery frame 120; the restraint structure 130 comprises a restraint pressing plate 131 and a connecting bracket 132, the connecting bracket 132 is connected to the battery frame 120, and the restraint pressing plate 131 is at least partially wrapped on the outside of the battery 110 and connected to the connecting bracket 132; wherein the restraint pressing plate 131, the connecting bracket 132 and the battery frame 120 are connected in sequence along the first direction.

[0052] In the battery assembly 100 of the embodiment, the battery 110 is fixed by the restraint structure 130 along the first direction, which can effectively ensure the connection strength between the restraint pressing plate 131, the connecting bracket 132 and the battery frame 120 when the battery 110 expands along the first direction, avoiding the generation of fatigue shear force, and dispersing the expansion force generated during the charging and discharging process of the battery 110 through the restraint pressing plate 131, thereby improving the overall reliability of the battery assembly 100.

[0053] In addition, it should be noted that, referring to Figure 1 And Figure 3As shown, the X direction in the figure can be the first direction, and the thickness direction of the battery 110 can be the first direction, and in a normal case, the battery 110 will expand in the thickness direction thereof during the cycle process, and the restraining pressing plate 131 is pressed on the battery 110 in the X direction, and the battery 110 is restrained and fixed by the cooperation of the restraining pressing plate 131 and the connecting bracket 132. Specifically, the X direction can be the thickness direction of the battery 110, that is, the plurality of batteries 110 are stacked along the X direction.

[0054] Specifically, in an embodiment, the battery 110 is at least partially accommodated in the battery frame 120, and the battery 110 is at least partially located outside the battery frame 120, at this time, the restraining pressing plate 131 can be pressed on the outside of the battery 110 in the first direction, and the restraining pressing plate 131 is butted with the battery frame 120 in the first direction through the connecting bracket 132. In some embodiments, the restraining pressing plate 131 can also be pressed on the outside of the battery frame 120 in the first direction, which is specifically determined according to the design requirements of the battery assembly 100, which is not uniquely limited here.

[0055] Referring to Figures 1 to 5 As shown, in an embodiment, the restraining pressing plate 131 includes a pressing portion 1311 and at least two connecting portions 1312, the at least two connecting portions 1312 are respectively connected to the pressing portion 1311, the pressing portion 1311 is pressed on the outside of the battery 110 in the first direction, and the at least two connecting portions 1312 are located on the side of the battery 110 and are respectively connected to the connecting bracket 132.

[0056] Specifically, when the battery 110 expands outwardly along the first direction, the pressing portion 1311 is located on the outside of the battery 110 and can effectively bear the expansion force from the battery 110, and the connecting portion 1312 is located on the side and connected to the connecting bracket 132, which not only ensures the stability of the connection, but also facilitates the connection of the restraining pressing plate 131 and the connecting bracket 132.

[0057] In this embodiment, the structural design of the restraining pressing plate 131 can effectively disperse the expansion force of the battery 110, reduce the direct impact on the connecting bracket 132, and thus reduce the potential safety hazard. In addition, by arranging the connecting portion 1312 on the outside of the second side, the connecting bracket 132 can be better connected with the connecting bracket 132, and the stability of the overall structure is enhanced. Specifically, the restraining pressing plate 131 can be arranged on the outside of the battery 110 along the X direction, referring to Figure 3 As shown, the placing direction, at this time, the pressing portion 1311 can be located on the top of the battery 110, and the connecting portion 1312 can be located on the side of the battery 110.

[0058] In an embodiment, the number of the connecting brackets 132 is at least two, and the at least two connecting brackets 132 are arranged corresponding to the at least two connecting portions 1312. Such a design greatly improves the overall strength of the restraint structure 130, thereby improving the reliability of the battery assembly 100.

[0059] In general, the arrangement of the plurality of connecting portions 1312 not only enhances the stability of the structure, but also disperses the stress applied on the connecting bracket 132, thereby improving the fatigue resistance of the structure. In addition, in some embodiments, the plurality of connecting portions 1312 can also be connected with the plurality of connecting brackets 132 respectively, forming a more flexible and stable frame structure. Such a frame structure helps to expand the restraint range of the restraint structure 130, ensuring that the deformation of the battery 110 can be effectively controlled during the expansion process, preventing possible safety hazards.

[0060] The specific arrangement of the connecting bracket 132 and the connecting portion 1312 will be adjusted according to the design requirements of the battery assembly 100, ensuring that the best effect can still be achieved in different application environments. Here, it is not limited to be unique, and the flexibility of this design makes the scheme adaptable to different battery capacity and form requirements, thereby providing more extensive application space.

[0061] It should be noted that when the number of the connecting bracket 132 is insufficient, the support strength of the structure may be insufficient, thereby affecting the overall reliability of the battery assembly 100. Therefore, preferably, the number of the connecting bracket 132 should be more than two, specifically two, three or more, to meet the actual design requirements. Such a configuration can effectively ensure that the stable deformation control capability can still be maintained during the multiple charge and discharge cycles of the battery 110, thereby prolonging the service life of the battery assembly 100.

[0062] In other embodiments, the number of the connecting bracket 132 in each group of the battery assembly 100 can also be one, and at this time, the connecting bracket 132 can be arranged at least partially around the battery 110 in the circumferential direction perpendicular to the first direction, thereby also achieving the pressing function of the restraint pressing plate 131.

[0063] In the present embodiment, the circumferential structure design of the connecting bracket 132 can also effectively disperse the pressure applied on the battery 110, avoiding the material fatigue or fracture problem caused by excessive local stress, and at the same time, by adopting the scheme of a single connecting bracket 132 surrounding the battery 110, the overall structural complexity of the restraint structure 130 can also be reduced, facilitating assembly.

[0064] Specifically, the circumferential surround of the connecting bracket 132 can be part or all around the battery 110, but it is generally recommended to set it to cover at least half of the circumference of the battery 110 to ensure its stability during use. This is not a single limitation; the extent of the surround of the connecting bracket 132 can be flexibly adjusted according to the size and characteristics of the battery, based on actual design requirements.

[0065] In one embodiment, there are two connecting portions 1312, and the two connecting portions 1312 are symmetrically arranged on opposite sides of the crimping portion 1311. When the restraining plate 131 is connected to the connecting bracket 132, the restraining plate 131 is arranged around the outside of the battery frame 120. After the restraining plate 131 and the connecting bracket 132 are connected and fixed by the first fastener 140, the restraining plate 131 can restrain the battery 110 in the expansion direction of the battery 110.

[0066] Specifically, the restraint plate 131 can be made of high-strength steel, with the material grade selected from the standard (GB / T 20564.2—2017). The specific material grade can be selected according to the standard (GB / T 20564.2—2017). The selection of high-strength steel can ensure the strength and durability of the structure, and effectively improve the fatigue resistance, thereby enhancing the safety and service life of the entire battery pack 10.

[0067] See Figure 6 , Figure 9 and Figure 10 As shown, in one embodiment, the connecting portion 1312 includes a first connecting portion 13121 and a second connecting portion 13122, and the first connecting portion 13121 and the second connecting portion 13122 are respectively connected to opposite sides of the crimping portion 1311; the first connecting portion 13121 has an allowance groove 131211. Specifically, there are multiple sets of restraint structures 130, and the restraint plates 131 in two adjacent sets of restraint structures 130 are connected to a connecting bracket 132, and the second connecting portion 13122 of one restraint plate 131 is at least partially accommodated in the allowance groove 131211 of the other restraint plate 131.

[0068] Specifically, the end portions of the first connecting portion 13121 and the second connecting portion 13122 can be bent and formed from the crimping portion 1311 and arranged vertically between the crimping portion 1311, the first connecting portion 13121 is bent from the connecting portion 1312 towards a direction away from the battery 110 to form a vertical structure, and the avoidance groove 131211 is arranged on the first bent segment; similarly, the second connecting portion 13122 is bent from the other side edge of the crimping portion 1311 towards a direction away from the crimping portion 1311. By such an arrangement, the second connecting portion 13122 of one of the restraint pressing plates 131 can be at least partially accommodated in the avoidance groove 131211 of the other restraint pressing plate 131, forming a nested structure.

[0069] By arranging the avoidance groove 131211 on the first connecting portion 13121 and cooperating with the second connecting portion 13122, the compactness of the overall structure of the restraint structure 130 can be achieved. Such a compact layout not only effectively saves space, but also improves the integration and stability of the entire battery pack 10 and reduces potential damage caused by external impact.

[0070] In the specific embodiment, the avoidance groove 131211 can be designed in different shapes and depths to adapt to restraint pressing plates 131 of different sizes and shapes, improving its compatibility. At the same time, the material of the connecting bracket 132 can be considered to be aluminum alloy or high-strength plastic to achieve a balance between reducing the overall weight and providing sufficient strength.

[0071] In some embodiments, the restraint pressing plate 131 can also be a flat plate structure, in which case the connecting portion 1312 can be arranged flush with the crimping portion 1311. Such a design not only simplifies the processing difficulty of the restraint pressing plate 131, but also reduces stress concentration caused by the unevenness between the connecting portion 1312 and the crimping portion 1311, thereby improving the mechanical properties and reliability of the restraint pressing plate 131.

[0072] Specifically, referring to Figure 7 As shown, the battery assembly 100 further comprises at least two first fasteners 140, the restraint pressing plate 131 is connected to the connecting bracket 132 through the first fastener 140, and the axial direction of the first fastener 140 extends along the first direction; the connecting bracket 132 is provided with a first fixing hole 13211 and a second fixing hole 13212, wherein the first fastener 140 is connected to one connecting portion 1312 through the first fixing hole 13211, and the other first fastener 140 is connected to the other connecting portion 1312 through the second fixing hole 13212.

[0073] With the above arrangement, when the battery assembly 100 is connected between multiple groups, the battery assembly 100 of adjacent two groups can be connected by the first fastener 140 at the first fixing hole 13211 and the second fixing hole 13212 respectively, so as to realize the connection and fixation between the adjacent two groups of battery assemblies 100. This connection mode can not only improve the overall strength of the restraint structure 130, but also effectively enhance the stability of the battery assembly 100, and reduce the displacement caused by external vibration or impact. In addition, the arrangement of at least two first fasteners 140 can also improve the redundancy of the structure, so that even if one of the fasteners is damaged, the safety and normal use of the battery assembly 100 can still be ensured, and system failure caused by failure can be avoided.

[0074] However, in order to ensure that the first fastener 140 can effectively bear the tensile force generated when the battery 110 expands, and in order to reduce the shear force borne by the first fastener 140, it is recommended that the axial direction of the first fastener 140 is as parallel as possible to the first direction, or the axial direction of the first fastener 140 is arranged at an acute angle with the first direction, which can be 0-30°.

[0075] In a specific implementation, the first fastener 140 can be a screw, a pin or other applicable fastener. When a screw is used, it can be conveniently disassembled and reassembled, which is convenient for later maintenance; and the use of a pin can provide higher connection strength, which is suitable for conditions that bear larger lateral forces. It should be noted that the number of first fasteners 140 can be one, two or more than two, which is not limited herein. Selecting multiple fasteners can make the connection more stable and prevent the overall connection from failing due to fatigue or damage of a single fastener.

[0076] In an embodiment, the direction of the first fixing hole 13211 towards the second fixing hole 13212 is arranged at an angle with the side wall of the battery frame 120.

[0077] Referring to the embodiment a of the connecting bracket 132 shown in Figure 7 The direction of the first fixing hole 13211 towards the second fixing hole 13212 is arranged at an angle with the side wall of the battery frame 120, which can effectively enhance the stability of the connection, so that the two restraint pressing plates 131 can better disperse the load when subjected to external stress, thereby improving the strength and durability of the overall structure. When the two restraint pressing plates 131 are connected with the connecting bracket 132 respectively, the first connecting part 13121 and the second connecting part 13122 can be as close as possible, so that the overall structure of the restraint structure 130 is more compact. The first fastener 140 can be fixedly connected with the first connecting part 13121 through the first fixing hole 13211, and the first fastener 140 can be fixedly connected with the second connecting part 13122 through the second fixing hole 13212.

[0078] In another embodiment, the number of fixing holes is multiple, and the multiple fixing holes are arranged in a straight line on the middle portion 1321.

[0079] Referring to Figure 7 As shown in the embodiment b of the connecting bracket 132, the first fixing hole 13211 and the second fixing hole 13212 in the multiple fixing holes are arranged in a direction parallel to the side wall of the battery frame 120. At this time, when multiple battery 110 assemblies 100 are arranged in the battery pack 10, the connecting bracket 132 of the embodiment b can be applied to the head and tail of the multiple battery 110 assemblies 100, because the head and tail of the multiple battery 110 assemblies 100 do not need to be connected to the additional restraint pressing plate 131 through the connecting bracket 132.

[0080] Specifically, at this time, the axial direction of the first fastener 140 is parallel to the X direction, and the first fastener 140 can adopt, for example, a screw, a pin, etc. When a screw is selected as the first fastener, its advantage lies in that it is convenient to adjust the locking force and can be reassembled, while the use of a pin can provide higher stability and reduce disassembly complexity. This flexible fastening mode not only can adapt to different assembly requirements, but also can effectively improve the anti-shock performance of the battery pack and reduce the potential safety hazards caused by changes in the use environment. At the same time, this design also helps to simplify the later maintenance and replacement work, and improves the overall use efficiency and reliability.

[0081] Further, referring to Figure 5 As shown, the restraint pressing plate 131 further comprises a reinforcing rib 1313 connected to the pressing portion 1311 and the connecting portion 1312, respectively.

[0082] In this embodiment, by forming the reinforcing rib 1313 on the restraint pressing plate 131, the overall strength of the restraint pressing plate 131 can be effectively improved. Specifically, the reinforcing rib 1313 can directly form a groove or a protrusion on the restraint pressing plate 131 through a stamping process. This process not only reduces the subsequent processing steps, but also helps to reduce production costs. At the same time, the connecting portion 1312 can be directly formed by bending, which simplifies the production process and improves the bonding strength of the connecting portion 1312 and the reinforcing rib 1313. In some embodiments, a plurality of heat dissipation holes can also be provided on the restraint pressing plate 131 to facilitate air circulation and heat dissipation of the battery 110 assembly 100.

[0083] In an embodiment, the restraint pressing plate 131 is at least partially wrapped on the outside of the battery frame 120. Through such a setting, the restraint pressing plate 131 can directly apply pressure to the battery frame 120, which effectively avoids the problem that the restraint pressing plate 131 causes extrusion damage to the outer wall of the battery 110 when the battery 110 expands, thereby ensuring the safety and service life of the battery.

[0084] Meanwhile, a plurality of battery stacks 110 are arranged inside the battery frame 120, and the number of the battery stacks 110 can be one, two or more, which is not limited herein. This arrangement can realize uniform pressure on the plurality of battery stacks 110 when the battery frame 120 is pressed by the restraint pressing plate 131, thereby improving the pressing stability of the restraint structure 130.

[0085] Specifically, referring to FIG. 1, Figure 3 As shown in FIG. 1, the battery frame 120 includes an end plate 121 and a side plate 122, the end plate 121 is connected to the side plate 122, and the end plate 121 and the side plate 122 enclose a space for accommodating the battery 110. This frame structure design can effectively provide support and protection, and ensure the safety and stability of the battery 110 assembly 100 under various working conditions. In addition, the restraint pressing plate 131 is at least partially pressed on the outer side of the end plate 121 and the side plate 122, respectively, and the overall rigidity of the frame is enhanced by pressing, thereby avoiding deformation during use and improving the reliability of the structure.

[0086] The connecting bracket 132 is located on the side of the side plate 122 away from the battery 110, and is designed to provide stable support for the battery frame 120. In this design, the side of the side plate 122 away from the battery 110 is provided with a lifting hook 1222, which can facilitate lifting and moving, thereby improving the operation flexibility and convenience of the frame. In this embodiment, the number of the end plate 121 and the side plate 122 is two, and the two end plates 121 and the two side plates 122 are arranged at intervals and connected in sequence to form a rectangular frame structure. This rectangular frame structure effectively provides uniform load distribution, which helps to improve the overall structural strength.

[0087] In a specific implementation, the end plate 121 and the side plate 122 can be made of high-strength aluminum alloy material, which has the advantages of light weight and high strength, thereby reducing the weight of the overall frame while maintaining excellent compression and bending resistance. In an embodiment, the end plate 121 and the side plate 122 are fixed by screws, and in order to realize the insulation protection of the battery 110 assembly 100, a PET insulating plate can be arranged between the side plate 122 and the battery 110. This design can effectively isolate the electrical contact between the battery 110 and the battery frame 120, thereby improving the safety of the battery pack 10. In addition, the isolation between the lower end plate 121 and the battery 110 can use a battery frame 120 made of PPO (polyphenyl ether) / PPE (polyphenyl ether) engineering plastic, and further, the battery 110 can be a combination of multiple single batteries 110, and a plastic bracket is arranged between each layer of single batteries 110 to ensure that the gap between the single batteries 110 meets the requirements, and also realizes good insulation protection.

[0088] In order to better fix the liquid cooling pipe and the sampling harness in the battery pack 10, the outer side of the restraint pressing plate 131 can be provided with a fixing anchor point such as a nut, so that an external component can be mounted on the restraint pressing plate 131, thereby avoiding the liquid cooling pipe and the harness directly contacting the edges of the metal or injection molding parts on the battery 110 assembly 100, thereby significantly improving the service life of these components and reducing the failure rate.

[0089] In an embodiment, the side plate 122 is provided with a mounting portion 1221 away from one side of the battery 110, and the connecting bracket 132 is connected to the mounting portion 1221. In this embodiment, by providing the mounting portion 1221 on the side plate 122 for mounting the connecting bracket 132, the mounting portion 1221 can be supported on the bottom of the connecting bracket 132 to position the mounting of the connecting bracket 132, and also make the combined structure of the side plate 122 and the connecting bracket 132 more compact; specifically, when the side plate 122 is manufactured by an injection molding process, the mounting portion 1221 can be directly molded on the side plate 122 to improve the overall strength of the side plate 122.

[0090] Specifically, as shown in Figure 1 、 Figure 8 and Figure 9 , the utility model also provides a battery pack 10, which comprises the battery assembly 100 in any of the above embodiments and the tray 200; the number of the battery assembly 100 is multiple groups, and the multiple groups of battery assemblies 100 are accommodated in the tray 200.

[0091] It can be understood that, in the battery pack 10 of the embodiment, by providing the battery assembly 100 in any of the above embodiments, the battery assembly 100 of the embodiment is pressed and fixed to the battery 110 along the first direction by the restraint structure 130, which can effectively ensure the connection strength between the restraint pressing plate 131 and the connecting bracket 132 when the battery 110 expands along the first direction, and disperse the expansion force generated in the charging and discharging process of the battery 110 through the restraint pressing plate 131, thereby avoiding the generation of fatigue shear force, and improving the overall reliability of the battery pack 10.

[0092] In an embodiment, the battery assembly 100 is connected to the tray 200 through the restraint structure 130.

[0093] In the embodiment, the connection strength between the battery assembly 100 and the tray 200 can be significantly improved by connecting the battery assembly 100 and the tray 200 through the restraint structure 130, and the stability and safety of the entire battery pack 10 can be ensured. The connection formed by the restraint structure 130 and the tray 200 can be one, two or more connection points, which is not limited herein. The technical effect of setting multiple connection points is that the external force can be effectively dispersed, and the stability of the overall structure is improved; when a large load is borne or a violent motion is experienced, the multiple connection points can support each other, reducing the risk of overall structural failure caused by single-point failure.

[0094] In some embodiments, the battery assembly 100 can also be directly accommodated in the tray 200, and then the battery assembly 100 is fixed by filling and sealing glue, thereby effectively improving the overall stability and anti-vibration performance of the battery assembly 100.

[0095] In the specific implementation, the filling and sealing glue used can be polyurethane glue, epoxy resin glue, etc. The polyurethane glue has good elasticity and durability, and can provide restoring force during the expansion or contraction of the battery assembly 100, preventing warping or displacement. The epoxy resin glue is favored for its excellent bonding strength, and can form a firm fixation in structure; at the same time, its excellent chemical resistance enables it to maintain effective performance under various environmental conditions. These specific implementations not only ensure the fixity of the battery assembly 100, but also to some extent, enhance its impact resistance and shock resistance performance, and improve the reliability of the entire battery pack.

[0096] In an embodiment, the restraint pressing plate 131, the battery frame 120 and the tray 200 are sequentially arranged along a first direction, and the connecting bracket 132 is located outside the battery 110 and connected to the restraint pressing plate 131 and the tray 200, respectively. The structure design aims to enhance the overall stability and safety of the battery pack 10.

[0097] When assembling the battery pack 10 of the embodiment, the connecting bracket 132 can be first connected with the battery frame 120 and the tray 200 to form a stable overall structure. At this time, the connecting bracket 132 as a key connecting element helps to improve the overall strength of the battery assembly 100 and avoid structural deformation caused by external impact. Next, the restraint pressing plate 131 is crimped on the outside of the battery assembly 100 and fixed through the connecting bracket 132. Such a design can effectively fix the battery assembly 100 in the tray 200, ensuring that the battery 110 can be limited by the restraint structure 130 when swelling.

[0098] Meanwhile, the embodiment effectively realizes the restraining effect of the restraining structure 130 on the battery 110. Specifically, the design of the restraining structure 130 ensures that when the battery 110 is subjected to external pressure or swelling, the restraining pressing plate 131 can uniformly distribute the pressure, avoiding concentrated stress from damaging the outer wall of the battery 110. In addition, the way of connecting different components using the connecting bracket 132 can also reduce the number of connecting parts in the structure, thereby reducing the complexity of manufacturing and assembly.

[0099] Specifically, the battery assembly 100 further comprises a first fastener 140 and a second fastener 150, and the connecting bracket 132 is provided with a fixing hole and a connecting hole 13221, the first fastener 140 is connected to the battery frame 120 and the connecting bracket 132 through the fixing hole respectively, and the second fastener 150 is connected to the battery frame 120 and the tray 200 through the connecting hole 13221 respectively.

[0100] In the embodiment, the first fastener 140 firmly connects the battery frame 120 and the connecting bracket 132 together through the fixing hole, thereby enhancing the structural strength and shock resistance of the entire battery pack 10. While the second fastener 150 stably connects the battery frame 120 to the tray 200 through the connecting hole 13221, which ensures that the battery pack 10 has good support ability and reliability during use, and the structure is simple and convenient to disassemble and assemble.

[0101] Referring to FIGS. 1, 2 and 3, Figure 3 and Figure 7 In some embodiments, the design of the connecting bracket 132 includes an intermediate part 1321 and a fixed part 1322. In this structure, the fixing hole is provided on the intermediate part 1321, and the connecting hole 13221 is provided on the fixed part 1322. Specifically, in the first direction, the fixed part 1322 is closely attached to the mounting part 1221 of the battery frame 120, the intermediate part 1321 is connected to the end of the fixed part 1322, and the intermediate part 1321 and the fixed part 1322 are sequentially arranged along the first direction and present a smooth transition therebetween. This design not only makes the connecting bracket 132 maintain good connection strength, but also effectively reduces the potential damage risk caused by stress concentration of the connecting part 1312.

[0102] In the embodiment, the extension of the intermediate part 1321 along the X direction makes it form a trapezoidal connecting bracket 132 shape in the direction away from the fixed part 1322. The advantage of this structure is that it can effectively shorten the length of the connecting part 1312 in the restraining pressing plate 131, thereby reducing the interference that may occur during assembly and use. This improvement makes the restraining structure 130 more compact and easy to assemble, reducing the difficulty of processing and assembly. At the same time, the trapezoidal structure can also improve the tensile and compressive capacity of the connecting bracket 132, further enhancing the stability and reliability of the battery pack 10.

[0103] To further optimize the performance of the connecting bracket 132, the design of the fixing hole and the connecting hole 13221 can adopt different shapes such as circular, slot-shaped or long strip-shaped to adapt to different construction requirements. Such diversified hole type design makes the installation process more flexible, which can adjust the position of the fastener according to actual needs, and enhances the connection accuracy and stability with the battery frame 120 and the restraint pressing plate 131. Overall, the structural design of the intermediate part 1321 and the fixing part 1322 not only improves the use safety of the product, but also realizes a more reasonable layout in structure.

[0104] The utility model also provides a kind of electric equipment, it includes electric device and the battery pack 10 in any one embodiment described above, and the battery pack 10 is electrically connected to electric device.

[0105] It can be understood that, in the electric equipment of the embodiment, by setting the battery pack 10 in any one embodiment described above, the battery pack 10 of the embodiment can effectively ensure the connection strength between the first fastener 140 and the connecting bracket 132 by setting the axial direction of the first fastener 140 parallel to the expansion direction of the battery 110 when the battery 110 expands, and disperse the expansion force generated in the charging and discharging process of the battery 110 through the restraint pressing plate 131, avoid the generation of fatigue shear force, thereby improving the overall reliability of the battery pack 10, and further improving the power utilization safety of the electric equipment.

[0106] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0107] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0108] In the embodiments of the present application, unless specifically defined and limited otherwise, a first feature is "on", "above", or "below" a second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact with an intervening medium. Also, a first feature "over", "above", and "on" a second feature can mean that the first feature is directly above or obliquely above the second feature, or that the first feature is merely horizontally higher than the second feature. A first feature "under", "below", and "underneath" a second feature can mean that the first feature is directly below or obliquely below the second feature, or that the first feature is merely horizontally lower than the second feature.

[0109] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples, without contradiction.

[0110] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery assembly (100) characterized by, The battery assembly (100) comprises: a plurality of batteries (110) and a battery frame (120) arranged along a first direction, at least part of the plurality of batteries (110) being accommodated in the battery frame (120); a restraint structure (130) comprising a restraint pressing plate (131) and a connecting support (132), the connecting support (132) being connected to the battery frame (120), and the restraint pressing plate (131) being at least partially wrapped around the outside of the battery (110) and connected to the connecting support (132); wherein the restraint pressing plate (131), the connecting support (132) and the battery frame (120) are sequentially connected along the first direction.

2. The battery assembly (100) according to claim 1, characterized in that The restraint pressing plate (131) comprises a pressing portion (1311) and at least two connecting portions (1312), the at least two connecting portions (1312) being respectively connected to the pressing portion (1311), the pressing portion (1311) being pressed to the outside of the battery (110) in the first direction, and the at least two connecting portions (1312) being located on the side of the battery (110) and respectively connected to the connecting support (132).

3. The battery assembly (100) of claim 2, characterized in that, The number of the connecting supports (132) is at least two, and the at least two connecting supports (132) are correspondingly arranged with the at least two connecting portions (1312).

4. The battery assembly (100) of claim 2, wherein, The at least two connecting portions (1312) are respectively a first connecting portion (13121) and a second connecting portion (13122), and the first connecting portion (13121) and the second connecting portion (13122) are respectively connected to opposite sides of the pressing portion (1311); the first connecting portion (13121) is provided with a relief groove (131211).

5. The battery assembly (100) of claim 2, wherein, The battery assembly (100) further comprises at least two first fasteners (140), the restraint pressing plate (131) being connected to the connecting support (132) through the first fasteners (140), and the axial direction of the first fasteners (140) extending along the first direction. The connecting support (132) is provided with a first fixing hole (13211) and a second fixing hole (13212), wherein one of the first fasteners (140) is connected to one of the connecting portions (1312) through the first fixing hole (13211), and the other of the first fasteners (140) is connected to the other of the connecting portions (1312) through the second fixing hole (13212).

6. The battery assembly (100) of claim 2, wherein, The restraint pressing plate (131) further comprises a reinforcing rib (1313), the reinforcing rib (1313) being respectively connected to the pressing portion (1311) and the connecting portion (1312).

7. The battery assembly (100) according to any one of claims 1-6, characterized in that, The restraint pressing plate (131) is at least partially wrapped around the outside of the battery frame (120).

8. The battery assembly (100) of claim 7, characterized in that The battery frame (120) comprises an end plate (121) and a side plate (122), the end plate (121) is connected to the side plate (122), and the end plate (121) and the side plate (122) enclose a space for accommodating the battery (110); the restraint pressing plate (131) is at least partially pressed to the outer side of the end plate (121) and the side plate (122) respectively; the connecting bracket (132) is located on the side of the side plate (122) away from the battery (110).

9. The battery assembly (100) of claim 8, characterized in that, The side plate (122) is provided with a mounting portion (1221) on the side away from the battery (110), and the connecting bracket (132) is connected to the mounting portion (1221).

10. The battery assembly (100) of claim 8, wherein, The side plate (122) is provided with a lifting hook (1222) on the side away from the battery (110).

11. A battery pack (10) characterized by, Comprise: a tray (200); and The battery assembly (100) as claimed in any one of claims 1-10 is accommodated in the tray (200). The battery assembly (100) is connected to the tray (200) through the restraint structure (130).

12. The battery pack (10) according to claim 11, characterized in that The restraint structure (130), the battery frame (120) and the tray (200) are sequentially arranged along the first direction, and the connecting bracket (132) is located on the outer side of the battery (110) and is connected to the restraint structure (130) and the tray (200) respectively.

13. The battery pack (10) of claim 12, characterized in that, The battery assembly (100) further comprises a first fastener (140) and a second fastener (150), the connecting bracket (132) is provided with a fixing hole and a connecting hole (13221), the first fastener (140) is connected to the battery frame (120) and the connecting bracket (132) through the fixing hole respectively, and the second fastener (150) is connected to the battery frame (120) and the tray (200) through the connecting hole (13221) respectively.

14. The battery pack (10) of claim 12, characterized in that, The connecting bracket (132) comprises an intermediate portion (1321) and a fixed portion (1322), the fixing hole is arranged on the intermediate portion (1321), and the connecting hole (13221) is arranged on the fixed portion (1322); in the first direction, the fixed portion (1322) is arranged in close contact with the mounting portion (1221) of the battery frame (120), the intermediate portion (1321) is connected to the end portion of the fixed portion (1322), and the intermediate portion (1321) and the fixed portion (1322) are sequentially arranged along the first direction.

15. The battery pack (10) of claim 14, characterized in that, The number of fixing holes is multiple, and multiple fixing holes are arranged in a straight line on the intermediate portion (1321).

16. The battery pack (10) according to claim 15, characterized by Comprise:

17. An electrical device, characterized by an electric device; and The battery assembly (100) as claimed in any one of claims 1-10, or the battery pack (10) as claimed in any one of claims 11-16, the battery assembly (100) is electrically connected to the electric device. ​ ​

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