A battery pack and an electric device

Abstract

The utility model provides a kind of battery pack and electrical equipment, battery pack includes box, multiple battery modules and pressing strip, multiple battery modules are installed in box, every battery module includes two end plates of interval arrangement and multiple batteries of being set between two end plates;Pressing strip is arranged in multiple end plates of the same side in multiple battery modules, to fix multiple end plates;With the electrical equipment, in the battery package assembly process, after battery module is assembled to box, by being arranged in multiple end plates of the same side in multiple battery modules, multiple end plates of the same side can be fixed simultaneously, not only multiple battery modules between connection can be increased, the overall rigidity of battery pack can be increased;At the same time, compared with traditional lock form, the number of parts of entire battery pack can be reduced, so that the machining process of entire battery pack is reduced, product process efficiency is improved, and overall package cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery pack and an electrical device. Background Technology

[0002] In related technologies, the mainstream solution for connecting the battery pack housing and the battery modules is to use screws at both ends of the battery modules to lock them to the housing, thereby constraining the modules to the inside of the housing. The battery modules are also connected to each other through module interlocking plates to increase the rigidity of the entire pack. However, the above locking method involves many parts, complex assembly processes, low assembly efficiency, and high overall cost. Utility Model Content

[0003] The present invention provides a battery pack that can improve the technical problems of existing battery packs having many locking components and complex assembly processes.

[0004] In a first aspect, embodiments of the present invention provide a battery pack comprising:

[0005] Box;

[0006] Multiple battery modules are installed inside the housing, each battery module including two end plates spaced apart and multiple batteries disposed between the two end plates; and

[0007] Pressure strips are inserted through multiple end plates on the same side of multiple battery modules to fix the multiple end plates.

[0008] In one embodiment, each of the end plates is provided with a through hole, and the pressure strip passes through the through hole of the multiple end plates on the same side of the multiple battery modules.

[0009] By inserting pressure strips through the through holes of multiple end plates, multiple battery modules can be tightly connected together. When the battery pack is subjected to external forces, the multiple battery modules can work together as a whole to bear the force, preventing displacement or damage to individual modules due to uneven stress. This significantly improves the connection stability between battery modules. Furthermore, the constraint effect of the pressure strips fixes the end plates of multiple battery modules on the same plane, forming a more rigid overall structure that can better resist external deformation forces. This reduces the possibility of battery module deformation or damage caused by vibration or impact during battery pack use, thereby extending the service life of the battery pack.

[0010] In one embodiment, an adhesive is provided in the through hole, which fixes the pressure strip and the plurality of end plates in place; and / or, the two ends of the pressure strip protrude from the end plates and are respectively bent to be fixed to the end plates.

[0011] Compared to traditional mechanical fixing methods, adhesive bonding provides a more uniform stress distribution, preventing connection failures caused by localized stress concentration. Adhesive bonding significantly enhances the connection strength and stability between the pressure strip and the end plate, ensuring that the battery pack will not loosen or detach due to external forces during use. Furthermore, adhesive bonding reduces the number of components used, further simplifying assembly and improving overall installation efficiency and costs.

[0012] It should also be noted that at least the two end plates at both ends have through holes filled with adhesive. The pressure strip is fixedly connected to the two end plates at both ends. The pressure strip can be bonded to the remaining end plates in the middle by adhesive, or the pressure strip can simply be inserted into the through holes of the end plates in the middle.

[0013] The bending design at both ends of the pressure strip increases the contact area and contact points between the pressure strip and the end plate, thus better securing the pressure strip to the end plate. Furthermore, the bent portion acts as a buffer and disperses stress; when the battery pack is subjected to vibration or impact, the bent portion can absorb some energy, reducing the stress directly transmitted to the pressure strip and end plate. In addition, fixing the battery pack by bending the pressure strip simplifies the installation process, reduces the number of parts used, further reduces assembly difficulty, and thus improves overall pack installation efficiency and reduces installation costs.

[0014] Understandably, in this embodiment, the two ends of the pressure strip protrude from the end plate and are bent and fastened to the end plate, so that the pressure strip is fixed in the through hole; of course, in other embodiments, the two ends of the pressure strip protrude from the end plate and are bent, and the bent part after protrusion is bent into a ring shape, so that the pressure strip is fixed in the through hole.

[0015] In one embodiment, along the height direction of the battery pack, the end plate includes a first surface away from the bottom plate of the housing, and the minimum distance between the through hole and the first surface is between 1 cm and 2 cm.

[0016] The through-hole is positioned at a certain distance from the first surface of the end plate (the surface furthest from the bottom plate of the housing). This distance reduces the stress on the through-hole caused by the pressure strip, thus preventing damage to the end plate during assembly. If the through-hole is too close to the first surface, the local strength of the end plate will decrease, leading to stress concentration during the installation and fixing of the pressure strip, which can then cause deformation or damage to the end plate. Therefore, a distance of 1cm to 2cm ensures that the end plate has sufficient structural strength during the installation and fixing of the pressure strip, preventing damage due to stress concentration and thus guaranteeing the stability and reliability of the battery module.

[0017] In one embodiment, each of the end plates is provided with a groove, and the pressure strip passes through the groove of the multiple end plates on the same side of the multiple battery modules and is fixedly connected to the multiple end plates.

[0018] The groove design provides a space for the pressure strip to be embedded, increasing the contact area between the pressure strip and the end plate, resulting in a tighter connection. Once embedded in the groove, the pressure strip better restrains the displacement of the end plate, preventing it from loosening due to vibration or external forces during use. Simultaneously, the pressure strip passing through the grooves of multiple end plates on the same side of multiple battery modules can fix the end plates of multiple battery modules onto the same plane, forming a more rigid overall structure. This better resists external deformation forces, reducing the possibility of battery module deformation or damage due to vibration or impact during battery pack use, thereby extending the battery pack's lifespan.

[0019] In addition, the groove provides a clear assembly space for the pressure strip, allowing it to be directly embedded in the groove without other complicated installation steps. This reduces potential errors during assembly and improves assembly efficiency.

[0020] In one embodiment, the groove is provided with an adhesive that fixes the pressure strip and the plurality of end plates together; and / or, the pressure strip is interference-fitted with the groove.

[0021] Compared to traditional mechanical fixing methods, adhesive bonding provides a more uniform stress distribution, preventing connection failures caused by localized stress concentration. Adhesive bonding significantly enhances the connection strength and stability between the pressure strip and the end plate, ensuring that the battery pack will not loosen or detach due to external forces during use. Furthermore, adhesive bonding reduces the number of components used, further simplifying assembly and improving overall installation efficiency and costs.

[0022] The interference fit connection allows for close contact and mutual compression between the pressure strip and the groove, resulting in a very strong connection. This significantly improves the connection strength between the pressure strip and the end plate, ensuring that the battery module will not loosen or fall off due to external forces during use, thus greatly enhancing the stability of the battery module.

[0023] In one embodiment, both ends of the pressure strip protrude from the end plate.

[0024] The pressure strip protrudes from both ends of the end plate, creating a relatively enclosed space between the end plate and the housing, thus reducing the channels through which moisture and dust can enter the battery module. Simultaneously, the protruding portion acts as a waterproof and dustproof "baffle," blocking the impact of the external environment on the battery module.

[0025] In one embodiment, the end plate is provided with a first weight-reducing hole; and / or, the pressure strip is provided with a second weight-reducing hole.

[0026] By setting the first weight-reducing hole, the overall weight of the end plate can be reduced without affecting its strength and function. Similarly, by setting the second weight-reducing hole, the overall weight of the pressure strip can be reduced without affecting its strength and function. In addition, the weight-reducing hole can increase the surface area of ​​the structural component, promote airflow, and serve as a heat dissipation channel to quickly conduct heat to the external environment, thereby improving heat dissipation efficiency.

[0027] In this embodiment, there are multiple first weight-reducing holes, which are arranged at intervals along the width direction of the end plate and extend along the length direction of the end plate; the second weight-reducing holes extend along the length direction of the pressure strip.

[0028] In one embodiment, the battery module is bonded and fixed to the bottom plate of the housing.

[0029] During battery pack assembly, the battery modules are first glued to the bottom plate of the box to prevent them from shifting or shaking within the box. The battery modules and the box form a whole, improving the overall rigidity of the battery pack and enabling it to better resist external deformation forces. This reduces structural damage caused by vibration or impact during use and extends the battery pack's lifespan. Furthermore, after the battery modules and the box are assembled, pressure strips are inserted through multiple end plates on the same side of the battery modules to fix the end plates, further improving the overall rigidity of the battery pack. The pressure strip assembly process is simple and efficient.

[0030] Secondly, embodiments of this utility model provide an electrical device including the aforementioned battery pack.

[0031] The beneficial effects of the embodiments of this utility model are as follows:

[0032] During the battery pack assembly process, after the battery modules are assembled into the housing, pressure strips are inserted into multiple end plates on the same side of multiple battery modules to simultaneously fix multiple end plates on the same side. This not only increases the connection between multiple battery modules but also increases the overall rigidity of the battery pack. At the same time, compared with the traditional locking method, it can reduce the number of parts in the entire battery pack, thereby reducing the processing steps of the entire battery pack, improving product process efficiency, and reducing the overall cost of the pack. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the battery pack provided in an embodiment of the present invention;

[0035] Figure 2 This is a partial structural schematic diagram of the battery pack provided in an embodiment of the present invention;

[0036] Figure 3 This is an exploded view of the battery pack provided in an embodiment of this utility model;

[0037] Figure 4 yes Figure 1 The diagram shows a first structural design of the end plate in the battery pack.

[0038] Figure 5 yes Figure 1 The diagram shows a second structural design of the end plate in the battery pack.

[0039] Figure 6 It is at Figure 2 A magnified view of a portion of point A in the middle.

[0040] The image is labeled as follows:

[0041] 1. Battery pack;

[0042] 11. Box body;

[0043] 12. Battery module; 121. End plate; 1211. First weight reduction hole; 122. Battery;

[0044] 13. Pressure strip; 131. Second weight reduction hole;

[0045] 14. Through hole;

[0046] 15. Groove. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0048] In related technologies, the mainstream connection scheme between the housing 11 and the battery module 12 of the battery pack 1 is to use screws at both ends of the battery module 12 to lock it to the housing 11, thereby constraining the module to the inside of the housing 11. The battery modules 12 are connected to each other through module interlocking pieces to increase the rigidity of the entire pack. However, the above-mentioned locking method has many parts, complex assembly process, low assembly efficiency, and high cost of the entire pack.

[0049] Reference Figures 1 to 3 As shown, this utility model embodiment provides a battery pack 1, which includes a housing 11, multiple battery modules 12 and a pressure strip 13. The multiple battery modules 12 are installed inside the housing 11. Each battery module 12 includes two end plates 121 spaced apart and multiple batteries 122 disposed between the two end plates 121. The pressure strip 13 passes through the multiple end plates 121 on the same side of the multiple battery modules 12 to fix the multiple end plates 121.

[0050] During the assembly of the battery pack 1, after the battery modules 12 are assembled into the housing 11, the pressure strips 13 are inserted into the end plates 121 on the same side of the multiple battery modules 12, which can simultaneously fix the multiple end plates 121 on the same side. This not only increases the connection between the multiple battery modules 12, but also increases the overall rigidity of the battery pack 1. At the same time, compared with the traditional locking method, it can reduce the number of parts of the entire battery pack 1, thereby reducing the processing steps of the entire battery pack 1, improving product process efficiency, and reducing the overall cost of the pack.

[0051] It is understood that in this embodiment, the pressure strip 13 is fixedly connected to multiple end plates 121 to ensure the fixing effect of the pressure strip 13 on the end plates 121.

[0052] In some embodiments, refer to Figure 4 As shown, each end plate 121 is provided with a through hole 14, and a pressure strip 13 passes through the through holes 14 of multiple end plates 121 on the same side of multiple battery modules 12. By passing the pressure strip 13 through the through holes 14 of multiple end plates 121, multiple battery modules 12 can be tightly connected together. When the battery pack 1 is subjected to external force, multiple battery modules 12 can share the force as a whole, avoiding displacement or damage to individual modules due to uneven force distribution, thereby significantly improving the connection stability between battery modules 12. Furthermore, through the constraint of the pressure strip 13, the end plates 121 of multiple battery modules 12 are fixed on the same plane, forming a more rigid overall structure that can better resist external deformation forces, reducing the possibility of deformation or damage to battery modules 12 caused by vibration or impact during use, and thus extending the service life of the battery pack 1.

[0053] In some embodiments, an adhesive is provided within the through-hole 14, which securely connects the pressure strip 13 and the multiple end plates 121. Compared to traditional mechanical fixing methods, adhesive bonding provides a more uniform stress distribution, preventing connection failure due to localized stress concentration. The adhesive bonding method significantly enhances the connection strength and stability between the pressure strip 13 and the end plates 121, ensuring that the battery pack 1 will not loosen or detach due to external forces during use. Furthermore, adhesive bonding reduces the number of components used, further simplifying assembly and improving overall pack installation efficiency and cost.

[0054] It should also be noted that at least the two end plates 121 at both ends are provided with adhesive in the through holes 14. The pressure strip 13 is fixedly connected to the two end plates 121 at both ends. The pressure strip 13 can be bonded to the remaining end plates 121 in the middle by adhesive, or the pressure strip 13 can simply be inserted into the through holes 14 of the end plate 121 in the middle.

[0055] In some embodiments, the two ends of the pressure strip 13 protrude from the end plate 121 and are bent respectively for fixing to the end plate 121. The bending design at both ends of the pressure strip 13 increases the contact area and contact points between the pressure strip 13 and the end plate 121, thereby better fixing the pressure strip 13 to the end plate 121. Furthermore, the bent portion can buffer and disperse stress. When the battery pack 1 is subjected to vibration or impact, the bent portion can absorb some energy, reducing the stress directly transmitted to the pressure strip 13 and the end plate 121. In addition, fixing by bending the pressure strip 13 simplifies the installation process, reduces the use of parts, further reduces assembly difficulty, and thus improves the overall installation efficiency and installation cost.

[0056] It is understood that in this embodiment, the two ends of the pressure strip 13 protrude from the end plate 121 and are bent and fastened to the end plate 121, so that the pressure strip 13 is fixed in the through hole 14; of course, in other embodiments, the two ends of the pressure strip 13 protrude from the end plate 121 and are bent, and the bent part after protrusion is bent into a ring shape, so that the pressure strip 13 is fixed in the through hole 14.

[0057] In some embodiments, refer to Figure 4As shown, along the height direction of the battery pack 1, the end plate 121 includes a first surface of the bottom plate away from the housing 11, and the minimum distance between the through hole 14 and the first surface is between 1cm and 2cm. The through hole 14 is at a certain distance from the first surface of the end plate 121 (i.e., the side surface of the bottom plate away from the housing 11), which reduces the stress on the through hole 14 caused by the pressure strip 13, thereby preventing damage to the end plate 121 during assembly. If the distance between the through hole 14 and the first surface is too close, it will lead to a decrease in the local strength of the end plate 121, resulting in stress concentration during the insertion and fixing of the pressure strip 13, which may cause deformation or damage to the end plate 121. Therefore, by setting a distance of 1cm to 2cm, it is possible to ensure that the end plate 121 has sufficient structural strength during the insertion and fixing of the pressure strip 13, avoiding damage due to stress concentration, thereby ensuring the stability and reliability of the battery module 12.

[0058] In some embodiments, refer to Figure 5 As shown, each end plate 121 is provided with a groove. A pressure strip 13 passes through the grooves of multiple end plates 121 on the same side of the multiple battery modules 12 and is fixedly connected to the multiple end plates 121. The groove design provides a space for the pressure strip 13 to be embedded, increasing the contact area between the pressure strip 13 and the end plate 121, resulting in a tighter connection. After the pressure strip 13 is embedded in the groove, it can better constrain the displacement of the end plate 121, preventing it from loosening due to vibration or external forces during use. Simultaneously, the pressure strip 13 passing through the grooves of multiple end plates 121 on the same side of the multiple battery modules 12 can fix the end plates 121 of the multiple battery modules 12 on the same plane, forming a more rigid overall structure. This better resists external deformation forces, reducing the possibility of deformation or damage to the battery modules 12 due to vibration or impact during use, thereby extending the service life of the battery pack 1.

[0059] In addition, the groove provides a clear assembly space for the pressure strip 13, allowing it to be directly embedded in the groove without other complicated installation steps, thereby reducing possible errors during assembly and improving assembly efficiency.

[0060] In some embodiments, an adhesive is provided within the groove, which securely connects the pressure strip 13 and the multiple end plates 121. Compared to traditional mechanical fixing methods, adhesive bonding provides a more uniform stress distribution, preventing connection failure due to localized stress concentration. The adhesive bonding method significantly enhances the connection strength and stability between the pressure strip 13 and the end plates 121, ensuring that the battery pack 1 will not loosen or detach due to external forces during use. Furthermore, adhesive bonding reduces the number of components used, further simplifying assembly and improving overall pack installation efficiency and cost.

[0061] In some embodiments, the pressure strip 13 is interference-fitted with the groove. The interference fit connection allows for close contact and mutual compression between the pressure strip 13 and the groove, thereby forming a very strong connection and significantly improving the connection strength between the pressure strip 13 and the end plate 121. This ensures that the pressure strip will not loosen or fall off due to external forces during use, greatly enhancing the fixation stability of the battery module 12.

[0062] In some embodiments, refer to Figure 6 As shown, both ends of the pressure strip 13 protrude from the end plate 121. The protrusion of the pressure strip 13 from the end plate 121 creates a relatively enclosed space between the end plate 121 and the housing 11, thereby reducing the channels for moisture and dust to enter the battery module 12. Simultaneously, the protruding portion acts as a waterproof and dustproof "baffle," blocking the influence of the external environment on the battery module 12.

[0063] In some embodiments, refer to Figure 6 As shown, the end plate 121 is provided with a first weight-reducing hole 1211; the pressure strip 13 is provided with a second weight-reducing hole 131. By providing the first weight-reducing hole 1211, the overall weight of the end plate 121 can be reduced without affecting its strength and function; similarly, by providing the second weight-reducing hole 131, the overall weight of the pressure strip 13 can be reduced without affecting its strength and function. Furthermore, the weight-reducing holes can increase the surface area of ​​the structural components, promote airflow, and serve as heat dissipation channels, quickly transferring heat to the external environment, thereby improving heat dissipation efficiency. In this embodiment, multiple first weight-reducing holes 1211 are provided, arranged at intervals along the width direction of the end plate 121, and extending along the length direction of the end plate 121; the second weight-reducing hole 131 extends along the length direction of the pressure strip 13.

[0064] In some embodiments, the battery module 12 is bonded and fixed to the bottom plate of the housing 11. During the assembly of the battery pack 1, the battery module 12 is first bonded to the bottom plate of the housing 11, thereby preventing the battery module 12 from shaking and shifting within the housing 11. The battery module 12 and the housing 11 form an integral whole, improving the overall rigidity of the battery pack 1, enabling it to better resist external deformation forces, reducing structural damage caused by vibration or impact during use, and extending the service life of the battery pack 1. In addition, after the battery module 12 and the housing 11 are assembled, the multiple end plates 121 located on the same side of the multiple battery modules 12 are fixed by passing the pressure strip 13 through them, which can further improve the overall rigidity of the battery pack 1. Moreover, the assembly process of the pressure strip 13 is simple and has high assembly efficiency.

[0065] Secondly, this utility model embodiment provides an electrical device, which includes the battery pack 1 as described above.

[0066] The exclusive use of this electrical equipment has all the beneficial effects of the aforementioned battery pack 1:

[0067] During the assembly of the battery pack 1, after the battery modules 12 are assembled into the housing 11, the pressure strips 13 are inserted into the end plates 121 on the same side of the multiple battery modules 12, which can simultaneously fix the multiple end plates 121 on the same side. This not only increases the connection between the multiple battery modules 12, but also increases the overall rigidity of the battery pack 1. At the same time, compared with the traditional locking method, it can reduce the number of parts of the entire battery pack 1, thereby reducing the processing steps of the entire battery pack 1, improving product process efficiency, and reducing the overall cost of the pack.

[0068] Electrical equipment can include, but is not limited to, vehicles, smart wearable devices, mobile terminals, home appliances, and medical devices; this application does not limit the scope of these categories. Vehicles include, but are not limited to, cars, buses, trains, ships, and aircraft. Smart wearable devices include, but are not limited to, smartwatches, smart bracelets, and neck massagers. Mobile terminals include, but are not limited to, smartphones, laptops, tablets, and POS (point-of-sales) machines. Home appliances include, but are not limited to, televisions, washing machines, air conditioners, rice cookers, smart robot vacuums, and smart lights. Medical devices include, but are not limited to, infrared electronic thermometers, pulse oximeters, and body composition analyzers.

[0069] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery pack, characterized in that, include: Box (11); Multiple battery modules (12) are installed inside the housing (11), each battery module (12) including two end plates (121) spaced apart and multiple batteries (122) disposed between the two end plates (121); and, A pressure strip (13) is inserted through multiple end plates (121) on the same side of multiple battery modules (12) to fix multiple end plates (121).

2. The battery pack according to claim 1, characterized in that, Each of the end plates (121) is provided with a through hole (14), and the pressure strip (13) passes through the through hole (14) of the multiple end plates (121) on the same side of the multiple battery modules (12).

3. The battery pack according to claim 2, characterized in that, The through hole (14) is provided with an adhesive, which fixes the pressure strip (13) and the plurality of end plates (121) in place; and / or, the two ends of the pressure strip (13) protrude from the end plate (121) and are bent respectively for fixing to the end plate (121).

4. The battery pack according to claim 2, characterized in that, Along the height direction of the battery pack (1), the end plate (121) includes a first surface of the bottom plate away from the housing (11), and the minimum distance between the through hole (14) and the first surface is between 1cm and 2cm.

5. The battery pack according to claim 1, characterized in that, Each of the end plates (121) is provided with a groove (15), and the pressure strip (13) passes through the groove (15) of the multiple end plates (121) on the same side of the multiple battery modules (12) and is fixedly connected to the multiple end plates (121).

6. The battery pack according to claim 5, characterized in that, The groove (15) is provided with an adhesive that fixes the pressure strip (13) and the plurality of end plates (121) in place; and / or, the pressure strip (13) is interference-fitted with the groove (15).

7. The battery pack according to claim 1, characterized in that, Both ends of the pressure strip (13) protrude from the end plate (121).

8. The battery pack according to claim 1, characterized in that, The end plate (121) is provided with a first weight-reducing hole (1211); and / or, the pressure strip (13) is provided with a second weight-reducing hole (131).

9. The battery pack according to claim 1, characterized in that, The battery module (12) is bonded and fixed to the bottom plate of the housing (11).

10. An electrical appliance, characterized in that, Includes the battery pack (1) as described in any one of claims 1-9.

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