Battery pack and electric automobile comprising same

Abstract

The utility model discloses a battery pack and an electric automobile comprising the same, the battery pack comprises a battery body, two side wall supports and a plurality of lock connecting structures, the two side wall supports are respectively connected to two opposite sides of the battery body along the length direction, and each of the two side wall supports comprises a support body; a plurality of reinforcing ribs are arranged on the outer side, back on to the battery body, in the bracket body, the plurality of reinforcing ribs are arranged at intervals in the length direction of the bracket body, and the lock connecting structures are arranged among the reinforcing ribs. Therefore, the connection strength between the plurality of lock connection structures and the side wall bracket is effectively enhanced, and the supporting strength requirement of the battery pack is met. Meanwhile, the weight of the side wall bracket is reduced on the basis of meeting the bearing strength of the side wall bracket, and materials are reduced, so that the effect of reducing the weight of the battery pack is achieved, and the effects of reducing the weight of the battery pack and improving the supporting strength of the side wall bracket are achieved; and the processing technology is simple and the cost is low.

Description

Technical Field

[0001] The utility model relates to a battery pack and an electric vehicle comprising the battery pack. Background Art

[0002] Electric vehicles have the advantages of zero emissions, low noise, and economical operation and maintenance, and are becoming more and more popular among users. The energy used by electric vehicles is the electricity provided by the battery packs on board. Electric vehicles need to be charged after the electricity is used up. The battery packs of electric vehicles are generally divided into fixed and replaceable types. Among them, fixed battery packs are generally fixed on the vehicle, and the vehicle is directly used as the charging object when charging. The replaceable battery packs are generally fixed on the bracket of the vehicle through a movable installation method. The battery pack can be removed for replacement or charging operations separately. After the replaced battery pack is charged, it is installed on the vehicle.

[0003] The existing battery pack includes a battery body, a side wall bracket, and a lock connection structure. The side wall bracket is made of metal and is installed and connected to the side wall of the battery body. The lock connection structure is installed on the side wall of the side wall bracket and is used to connect with the quick-change bracket on the chassis of the electric vehicle. As the volume and weight of the battery body in the prior art are getting larger and larger, the overall structure of the side wall bracket needs to be made of thicker metal, resulting in a heavier overall weight of the battery pack. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the volume and weight of the battery body are getting larger and larger, so that the overall structure of the side wall bracket needs to be made of thicker metal, resulting in a heavier overall weight of the battery pack, and to provide a battery pack and an electric vehicle containing the same.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A battery pack comprises a battery body, two side wall brackets and a plurality of lock connection structures, wherein the two side wall brackets are respectively connected to opposite sides of the battery body along the length direction, and the two side wall brackets each comprise a bracket body; a plurality of reinforcing ribs are arranged on the outer side of the bracket body facing away from the battery body, the plurality of reinforcing ribs are arranged at intervals along the length direction of the bracket body, and the lock connection structure is arranged between the reinforcing ribs.

[0007] In this solution, the above-mentioned structural form is adopted, and multiple outwardly protruding reinforcing ribs are provided on the outer side of the bracket body facing away from the battery body, and the lock connection structure is arranged between the reinforcing ribs, thereby effectively strengthening the connection strength between the multiple lock connection structures and the side wall bracket, meeting the support strength requirements of the battery pack, and ensuring the locking accuracy. At the same time, multiple reinforcing ribs are arranged at intervals along the length direction of the bracket body, so as to reduce the weight of the side wall bracket on the basis of meeting the load-bearing strength of the side wall bracket, reduce the material, and achieve the effect of reducing the weight of the battery pack, so as to achieve the effect of simultaneously taking into account the weight reduction of the battery pack and improving the support strength of the side wall bracket; and the processing technology is simple and the cost is low.

[0008] Preferably, the side wall bracket further comprises a thickened portion, wherein the thickened portion is arranged in the bracket body and is arranged corresponding to the reinforcing rib on the outer side of the bracket body.

[0009] In the present solution, the above-mentioned structural form is adopted, and the thickened portion is arranged in the bracket body and corresponds to the reinforcing ribs on the outside of the bracket body, so that the thickened portion and the reinforcing ribs can strengthen the inner and outer sides of the bracket body, making the structure of the bracket body more stable and reliable to meet the supporting strength requirements of the battery pack; at the same time, the thickened portion is arranged in the bracket body, does not occupy additional space, and realizes a more compact structure.

[0010] Preferably, the bracket body has a plurality of weight-reducing cavities, the thickened portion is arranged in the weight-reducing cavity and connected to the inner wall of the bracket body close to the reinforcing rib, and the locking connection structure passes through the side wall of the bracket body and is connected to the thickened portion.

[0011] In this solution, the above-mentioned structural form is adopted, and multiple weight-reducing cavities have a weight-reducing effect, which can effectively reduce the overall weight of the side wall bracket, so that the overall weight of the battery pack can be reduced and the material can be reduced while ensuring that the overall structural strength of the battery pack meets the requirements. Compared with only one larger weight-reducing cavity, the use of multiple weight-reducing cavities can utilize the connection structure between them to enhance the support strength of the side wall bracket, and further enhance the structural strength of the side wall bracket. At the same time, by setting the thickened part in the weight-reducing cavity, no additional space is occupied; the thickened part is connected to the inner wall of the bracket body close to the reinforcing rib, and the connection structure between the thickened part and the bracket body can be used to enhance the load-bearing strength of the side wall bracket, so that when the lock connection structure passes through the side wall of the bracket body and is connected to the thickened part, it can ensure that the connection of the lock connection structure is more stable and reliable.

[0012] Preferably, the bracket body includes an outer shell, at least one transverse partition, at least one longitudinal partition and at least one inclined partition, the battery body and the lock connection structure are respectively connected to two sides of the outer shell, the transverse partition, the longitudinal partition and the inclined partition are all connected to the outer shell and divide the space inside the outer shell into a plurality of weight-reducing cavities.

[0013] In the present solution, the above-mentioned structural form is adopted, and the structural strength of the bracket body can be greatly enhanced by distributing the transverse partitions, the longitudinal partitions and the inclined partitions, thereby improving the safety, stability and seismic resistance of the battery pack.

[0014] Preferably, the locking connection structure includes a mounting seat, a locking shaft and a support shaft, the locking shaft and the support shaft are respectively arranged on opposite sides of the mounting seat, the mounting seat is installed on the bracket body, the locking shaft is connected to the outer side of the mounting seat facing away from the battery body and is used to lock and connect with the locking mechanism on the quick-change bracket, the support shaft is connected to the inner side of the mounting seat facing the battery body, the support shaft passes through the side wall of the bracket body and is embedded in the thickened portion.

[0015] In this solution, the above-mentioned structural form is adopted, and the lock connection structure is inserted into the thickened part through the support shaft, and precise positioning is achieved through the support shaft, which ensures the installation accuracy, further improves the installation connection strength, and is easy to install. The two sides of the mounting seat respectively exert force on the locking mechanism and the side wall bracket through the lock shaft and the support shaft, forming a double-sided force, so that the support shaft can share the shear force received by the lock shaft during actual work, increase the fixing strength of the lock connection structure, thereby greatly improving the stability of the lock connection structure and extending the service life of the lock connection structure; at the same time, effectively avoiding displacement of the lock connection structure, further ensuring the locking accuracy.

[0016] Preferably, the outer side of the bracket body facing away from the battery body has a first weight-reducing groove recessed inwardly, and the first weight-reducing groove is arranged between two adjacent reinforcing ribs. One end of the locking connection structure extends into the first weight-reducing groove and is connected to the bracket body, and the other end of the locking connection structure is exposed from the outer wall surface of the bracket body and is used for locking connection with the locking mechanism on the quick-change bracket.

[0017] In this solution, the above-mentioned structural form is adopted, and the gap between the side wall bracket and the quick-change bracket is reduced by extending the lock connection structure into the first weight-reducing groove, and the lock connection structure and the outer side surface of the bracket body have a large contact area, and the installation connection stability is high, thereby meeting the support strength requirements of the battery pack and ensuring the locking accuracy. At the same time, the first weight-reducing groove plays a weight-reducing role, realizing the overall weight reduction of the battery pack and reducing the material consumption, and the first weight-reducing groove has a simple structure and is easy to process and manufacture.

[0018] Preferably, the reinforcing ribs include upper reinforcing ribs and lower reinforcing ribs, and the upper reinforcing ribs and the lower reinforcing ribs are connected to the bracket body at intervals along the height direction of the battery body, so that a second weight-reducing groove is formed between the upper reinforcing ribs and the lower reinforcing ribs.

[0019] In the present solution, the above-mentioned structural form is adopted, and the second weight-reducing groove has a weight-reducing effect, which can further reduce the overall weight of the side wall bracket, so that the overall weight of the battery pack can be reduced and the material consumption can be reduced while ensuring that the overall structural strength of the battery pack meets the requirements; and the second weight-reducing groove has a simple structure and is easy to process and manufacture.

[0020] Preferably, the battery pack further comprises a guide and positioning mechanism, wherein the guide and positioning mechanism are respectively arranged on the outer side of the bracket body facing away from the battery body, and the guide and positioning mechanism is connected to the reinforcing rib.

[0021] In this solution, the above-mentioned structural form is adopted, and the guide positioning mechanism plays a guiding role during the installation of the battery pack, and accurately aligns the battery pack with the quick-change bracket at the bottom of the electric vehicle, so that the installation accuracy of the battery pack is higher. After the battery pack is installed, it abuts against the mounting surface of the locking mechanism of the quick-change bracket on the electric vehicle to prevent the lock shaft from falling off from the side, ensuring stable and reliable locking. At the same time, the two sides of the battery pack have a certain force on the vehicle body in the width direction, effectively reducing the wear between the battery pack and the vehicle body, and increasing the service life of the battery pack. And the guide positioning mechanism is connected to the high-strength reinforcing ribs to achieve a more stable and reliable connection.

[0022] Preferably, the guiding and positioning mechanism includes a positioning block and a plurality of fastening components, a plurality of through holes are correspondingly formed on the bracket body and the reinforcing ribs, a plurality of connecting holes are formed on the thickened portion, and the fastening components pass through the through holes and are connected to the connecting holes.

[0023] In this solution, the above-mentioned structural form is adopted to realize the installation and connection of the guide positioning mechanism on the bracket body, the reinforcing ribs and the thickened part, further realizing a more stable and reliable connection, greatly improving the safety and stability of the battery pack. At the same time, the structure is simple and the installation and setting are very convenient.

[0024] Preferably, the side wall bracket further comprises a protective plate, one end of which is connected to the outer side of the bracket body facing away from the battery body, and the other end of which extends outwardly in a horizontal direction.

[0025] In this solution, the above-mentioned structural form is adopted, and the protective plate has a protective shielding function. The protective plate will be used to shield the gap between the battery pack and the quick-change bracket, effectively preventing impurities from entering the gap between the battery pack and the quick-change bracket, thereby greatly improving the safety and stability of the electric vehicle.

[0026] Preferably, the protective plate is connected to the bottom of the bracket body and is located below the lock connection structure;

[0027] And / or, the protective plate is provided with a notch for the unlocking member to pass through;

[0028] And / or, the outwardly extending width of the protective plate is smaller than the thickness of the guiding and positioning mechanism.

[0029] In the present solution, the above-mentioned structural form is adopted, and the protective plate below the lock connection structure can effectively prevent impurities from entering the gap between the bracket body and the quick-change bracket and affecting the locking accuracy of the lock connection structure, which helps to extend the service life of the lock connection structure.

[0030] At the same time, the gap can effectively avoid interference caused by the protective plate, ensure smooth unlocking, and ensure the normal implementation of the battery replacement operation of the electric vehicle.

[0031] In addition, the guide positioning mechanism will be located inside the quick-change bracket and exert force on the inner wall surface of the quick-change bracket to achieve precise positioning. The width of the protective plate extending outward is smaller than the thickness of the guide positioning mechanism, so that the protective plate and the inner wall surface of the quick-change bracket will not contact and interfere with each other.

[0032] Preferably, the battery pack also includes a battery case, which includes an upper cover, a bottom plate, a front beam and a rear beam, wherein the front beam, the rear beam and the two side wall brackets together form a frame structure, and the front beam and / or the rear beam have a cavity inside; the upper cover and the bottom plate are respectively arranged on the top and bottom surfaces of the frame structure to form a accommodating cavity for accommodating the battery body.

[0033] In this solution, the above-mentioned structural form is adopted, and a frame structure is formed by enclosing a front beam, a rear beam and two side wall brackets. The upper cover and the bottom plate are respectively arranged on the top and bottom surfaces of the frame structure to form a closed accommodating cavity for accommodating the battery body, so as to protect the battery body through the accommodating cavity, effectively prevent external impurities from entering the battery pack and causing damage to the battery body, ensure the safety and stability of the battery body, and thus improve the service life of the battery body. The front beam and / or the rear beam have a cavity inside, so that the overall weight of the battery pack is reduced and the material used is reduced while ensuring that the overall structural strength of the battery pack meets the requirements, thereby achieving the effect of reducing the weight of the battery pack; and the processing technology is simple and the cost is low.

[0034] Preferably, the battery box further comprises a fixing member, the fixing member is located in the frame structure, and the fixing member is connected to the front beam, the rear beam and the two side wall brackets;

[0035] And / or, the battery box further comprises a temperature regulating member, which is disposed on the upper cover and / or the bottom plate and is used to regulate the temperature in the accommodating cavity;

[0036] And / or, the battery box further comprises a reinforcing member disposed between the temperature regulating member and the bottom plate, one end of the reinforcing member is connected to the bottom plate, and the other end of the reinforcing member extends in a direction close to the battery body, for supporting the battery body;

[0037] And / or, the battery box further includes a buffer component, and the buffer component is arranged between the temperature regulating component and the bottom plate.

[0038] In this solution, the above structural form is adopted, and the fixing part has a reinforcing effect, further strengthening the structural strength of the battery pack, effectively avoiding the deformation of the battery pack, improving the anti-seismic performance of the battery pack, and greatly improving the safety and stability of the battery pack. At the same time, the fixing part is located in the frame structure, making the structure more compact and not occupying additional space.

[0039] In addition, the thermostat can both lower the temperature in the accommodating cavity and raise the temperature in the accommodating cavity, which is helpful to ensure that the temperature in the accommodating cavity is at a normal temperature, thereby avoiding affecting the normal operation and performance stability of the components in the accommodating cavity. Especially when facing extremely cold or hot weather, the thermostat can reduce the impact of the external temperature on the battery pack, which is helpful to increase the use scenarios of the battery pack and improve the versatility of the battery pack. When both the upper cover and the bottom plate are provided with thermostats, it is helpful to ensure the uniformity of the temperature regulation of the battery pack, thereby ensuring the functional integrity of the battery pack and increasing the service life of the battery pack. At the same time, the thermostat is arranged on the upper cover and / or the bottom plate instead of being arranged inside the battery body, so that the thermostat does not occupy the space resources of the battery body, and the capacity of the battery body in the accommodating cavity is further increased, the driving range of the electric vehicle is increased, and the structure is more compact and occupies less space.

[0040] By reinforcing the bottom plate with reinforcement pieces, the strength of the bottom plate is improved, thereby reducing the risk of the bottom plate being crushed by the battery body, improving the strength and stability of the bottom plate in supporting the battery body, and further improving the stability and reliability of the placement of the battery body.

[0041] The buffer component can provide buffering for the battery body to prevent the battery body from being damaged by collision during transportation, thereby further improving the safety and service life of the battery body.

[0042] An electric vehicle comprises the battery pack as described above.

[0043] In this solution, the above-mentioned structural form is adopted, and the connection strength between the multiple lock connection structures and the side wall bracket is effectively strengthened by installing the lock connection structure on the reinforcing ribs and setting the lock connection structure between the reinforcing ribs, so as to meet the support strength requirements of the battery pack and ensure the locking accuracy. At the same time, multiple reinforcing ribs are arranged at intervals along the length direction of the bracket body, so as to reduce the weight of the side wall bracket on the basis of meeting the load-bearing strength of the side wall bracket, reduce the material used, and achieve the effect of reducing the weight of the battery pack, so as to achieve the effect of simultaneously reducing the weight of the battery pack and improving the support strength of the side wall bracket; and the processing technology is simple and the cost is low.

[0044] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0045] The positive and progressive effects of the utility model are:

[0046] The battery pack of the utility model and the electric vehicle including the same are provided with a plurality of reinforcing ribs on the outer side of the bracket body facing away from the battery body, and the lock connection structure is arranged between the reinforcing ribs, thereby effectively strengthening the connection strength between the plurality of lock connection structures and the side wall bracket, and meeting the support strength requirements of the battery pack. At the same time, the plurality of reinforcing ribs are arranged at intervals along the length direction of the bracket body, so as to reduce the weight of the side wall bracket on the basis of meeting the load-bearing strength of the side wall bracket, reduce the material, and thus achieve the effect of reducing the weight of the battery pack, so as to achieve the effect of simultaneously taking into account the weight reduction of the battery pack and improving the support strength of the side wall bracket; and the processing technology is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a schematic diagram of the three-dimensional structure of a battery pack according to an embodiment of the utility model.

[0048] Figure 2 Schematic diagram of the internal structure of a battery pack according to an embodiment of the present utility model.

[0049] Figure 3 It is a schematic diagram of the internal structure of the battery pack at the lock connection structure of an embodiment of the utility model.

[0050] Figure 4 It is a schematic diagram of the internal structure of the battery pack at the guide and positioning mechanism of an embodiment of the utility model.

[0051] Figure 5 It is a schematic diagram of the cross-sectional structure of the battery box along the longitudinal direction of an embodiment of the utility model.

[0052] Figure 6 for Figure 5 Schematic diagram of the local three-dimensional structure.

[0053] Figure 7It is a schematic structural diagram of the upper cover of an embodiment of the utility model.

[0054] Figure 8 It is a structural schematic diagram of the bottom plate of an embodiment of the utility model.

[0055] Description of reference numerals:

[0056] Side wall bracket 1, bracket body 11, reinforcing rib 111, upper reinforcing rib 1111, lower reinforcing rib 1112, second weight-reducing groove 1113, weight-reducing cavity 112, outer shell 113, transverse partition 114, longitudinal partition 115, inclined partition 116, first weight-reducing groove 117, through hole 118, thickened portion 12, connecting hole 121, protective plate 13, notch 131, lock connection structure 2, mounting seat 21, lock shaft 22, support shaft 23, guide positioning mechanism 3, positioning block 31, fastening component 32, battery box 4, upper cover 41, bottom plate 42, front beam 43, rear beam 44, fixing part 45, temperature regulating part 46, reinforcing part 47, buffer part 48. DETAILED DESCRIPTION

[0057] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the following embodiments.

[0058] The utility model discloses an electric vehicle, which includes a battery pack, which is detachably mounted on the bottom of the electric vehicle. The battery pack can be removed for charging, and after the battery pack is fully charged, the battery pack is mounted on the bottom of the electric vehicle.

[0059] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the battery pack includes a battery body, two side wall brackets 1 and a plurality of lock connection structures 2. The two side wall brackets 1 are respectively connected to the two opposite sides of the battery body along the length direction. The two side wall brackets 1 each include a bracket body 11. A plurality of reinforcing ribs 111 are arranged on the outer side of the bracket body 11 facing away from the battery body. The plurality of reinforcing ribs 111 are arranged at intervals along the length direction of the bracket body 11, and the lock connection structure 2 is arranged between the reinforcing ribs 111. The two side wall brackets 1 are respectively connected to the two opposite sides of the battery body along the length direction, so that the connection contact area between the two side wall brackets 1 and the battery body is large, and the connection strength between the battery body and the two side wall brackets 1 is effectively strengthened. By providing a plurality of outwardly protruding reinforcing ribs 111 on the outer side of the bracket body 11 facing away from the battery body, and arranging the lock connection structure 2 between the reinforcing ribs 111, the connection strength between the plurality of lock connection structures 2 and the side wall bracket 1 is effectively strengthened, the support strength requirements of the battery pack are met, and the locking accuracy is ensured. At the same time, multiple reinforcing ribs 111 are arranged at intervals along the length direction of the bracket body 11, so as to reduce the weight of the side wall bracket 1 while meeting the load-bearing strength of the side wall bracket 1, reduce the material used, and thus achieve the effect of reducing the weight of the battery pack, so as to achieve the effect of reducing the weight of the battery pack and improving the supporting strength of the side wall bracket 1 at the same time; and the processing technology is simple and the cost is low.

[0060] The side wall bracket 1 also includes a thickened portion 12, which is arranged in the bracket body 11 and corresponds to the reinforcing ribs 111 on the outside of the bracket body 11. By setting the thickened portion 12 in the bracket body 11 and corresponding to the reinforcing ribs 111 on the outside of the bracket body 11, the thickened portion 12 and the reinforcing ribs 111 can strengthen the inner and outer sides of the bracket body 11, so that the structure of the bracket body 11 is more stable and reliable to meet the support strength requirements of the battery pack; at the same time, the thickened portion 12 is arranged in the bracket body 11, does not occupy additional space, and achieves a more compact structure. Among them, multiple lock connection structures 2 are connected to the side wall bracket 1 and installed on the reinforcing ribs 111 and the thickened portion 12, which further strengthens the connection strength between the multiple lock connection structures 2 and the side wall bracket 1, meets the support strength requirements of the battery pack, and ensures the locking accuracy.

[0061] The bracket body 11 has a plurality of weight-reducing cavities 112, the thickened portion 12 is disposed in the weight-reducing cavity 112, and is connected to the inner wall of the bracket body 11 near the reinforcing rib 111, and the lock connection structure 2 passes through the side wall of the bracket body 11 and is connected to the thickened portion 12. The bracket body 11 has a plurality of weight-reducing cavities 112, and the plurality of weight-reducing cavities 112 have a weight-reducing effect, which can effectively reduce the overall weight of the side wall bracket 1, so that the overall weight of the battery pack can be reduced and the material can be reduced while ensuring that the overall structural strength of the battery pack meets the requirements. Compared with using only one larger weight-reducing cavity 112, using a plurality of weight-reducing cavities 112 can utilize the connection structure therebetween to enhance the support strength of the side wall bracket 1, and further enhance the structural strength of the side wall bracket 1. At the same time, the thickened portion 12 is arranged in the weight-reducing cavity 112 without occupying additional space; the thickened portion 12 is connected to the inner wall of the bracket body 11 close to the reinforcing rib 111, and the connection structure between the thickened portion 12 and the bracket body 11 can be used to enhance the load-bearing strength of the side wall bracket 1, so that when the lock connection structure 2 passes through the side wall of the bracket body 11 and is connected to the thickened portion 12, it can be ensured that the connection of the lock connection structure 2 is more stable and reliable.

[0062] like Figure 3 and Figure 4 As shown, the bracket body 11 includes a shell 113, at least one transverse partition 114, at least one longitudinal partition 115 and at least one inclined partition 116. The battery body and the lock connection structure 2 are respectively connected to the two sides of the shell 113. The transverse partition 114, the longitudinal partition 115 and the inclined partition 116 are all connected to the shell 113 and divide the space in the shell 113 into a plurality of weight-reducing cavities 112. The transverse partition 114, the longitudinal partition 115 and the inclined partition 116 are all connected to the shell 113 and connected to each other to achieve the purpose of dividing the larger space in the shell 113 into a plurality of weight-reducing cavities 112. The distribution arrangement of the transverse partition 114, the longitudinal partition 115 and the inclined partition 116 can greatly enhance the structural strength of the bracket body 11, thereby improving the safety, stability and anti-seismic performance of the battery pack. Among them, the shell 113, at least one transverse partition 114, at least one longitudinal partition 115 and at least one inclined partition 116 are integrally formed. The number and specific distribution positions of the transverse partitions 114, the longitudinal partitions 115 and the inclined partitions 116 are not limited and can be installed and arranged according to strength requirements.

[0063] In this embodiment, the thickened portion 12 is disposed in the housing 113, and the thickened portion 12 and the plurality of reinforcing ribs 111 are distributed and disposed on both sides of the housing 113. The thickened portion 12 and the bracket body 11 are integrally formed, which is very convenient for processing and manufacturing, and has high structural strength. Of course, in other embodiments, the thickened portion 12 and the bracket body 11 may also be a split structure, and the thickened portion 12 may be inserted into the weight-reducing cavity 112 of the bracket body 11 when in use.

[0064] The outer side of the bracket body 11 facing away from the battery body has a first weight-reducing groove 117 recessed inwardly. The first weight-reducing groove 117 is arranged between two adjacent reinforcing ribs 111. One end of the locking connection structure 2 extends into the first weight-reducing groove 117 and is connected to the bracket body 11. The other end of the locking connection structure 2 is exposed on the outer wall surface of the bracket body 11 and is used for locking connection with the locking mechanism on the quick-change bracket. The outer side of the bracket body 11 facing away from the battery body has a plurality of outwardly protruding reinforcing ribs 111 and an inwardly recessed first weight-reducing groove 117. The first weight-reducing groove 117 is arranged between two adjacent reinforcing ribs 111, that is, the first weight-reducing groove 117 is recessed inward from the protruding surface of the two adjacent reinforcing ribs 111, so that the bottom of the first weight-reducing groove 117 is a horizontal plane. The lock connection structure 2 extends into the first weight-reducing groove 117 to reduce the gap between the side wall bracket 1 and the quick-change bracket, and realizes a large abutment area between the lock connection structure 2 and the outer side surface of the bracket body 11, and high installation connection stability, thereby meeting the support strength requirements of the battery pack and ensuring the locking accuracy. At the same time, the first weight-reducing groove 117 plays a weight-reducing role, realizes the overall weight reduction of the battery pack, reduces the material, and the first weight-reducing groove 117 has a simple structure and is easy to process and manufacture.

[0065] The reinforcing rib 111 includes an upper reinforcing rib 1111 and a lower reinforcing rib 1112, and the upper reinforcing rib 1111 and the lower reinforcing rib 1112 are connected to the bracket body 11 at intervals along the height direction of the battery body, so that a second weight-reducing groove 1113 is formed between the upper reinforcing rib 1111 and the lower reinforcing rib 1112. The reinforcing rib 111 forms a second weight-reducing groove 1113 between the upper reinforcing rib 1111 and the lower reinforcing rib 1112 through the upper reinforcing rib 1111 and the lower reinforcing rib 1112. The second weight-reducing groove 1113 has a weight-reducing effect, and can further reduce the overall weight of the side wall bracket 1, so that the overall weight of the battery pack is reduced and the material is reduced while ensuring that the overall structural strength of the battery pack meets the requirements; and the second weight-reducing groove 1113 has a simple structure and is easy to process and manufacture.

[0066] like Figure 3As shown, the lock connection structure 2 includes a mounting seat 21, a locking shaft 22 and a supporting shaft 23. The locking shaft 22 and the supporting shaft 23 are respectively arranged on opposite sides of the mounting seat 21. The mounting seat 21 is mounted on the bracket body 11. The locking shaft 22 is connected to the outer side of the mounting seat 21 facing away from the battery body and is used to lock and connect with the locking mechanism on the quick-change bracket. The supporting shaft 23 is connected to the inner side of the mounting seat 21 facing the battery body. The supporting shaft 23 passes through the side wall of the bracket body 11 and is embedded in the thickened portion 12. The lock connection structure 2 is inserted into the thickened portion 12 through the supporting shaft 23, and precise positioning is achieved through the supporting shaft 23, which ensures the installation accuracy, further improves the installation connection strength, and is easy to install. The two sides of the mounting seat 21 exert force on the locking mechanism and the side wall bracket 1 respectively through the locking shaft 22 and the supporting shaft 23, forming a bilateral force, so that the supporting shaft 23 can share the shear force exerted on the locking shaft 22 during actual work, thereby increasing the fixing strength of the locking connection structure 2, thereby greatly improving the stability of the locking connection structure 2 and extending the service life of the locking connection structure 2; at the same time, it effectively avoids the displacement of the locking connection structure 2 and further ensures the locking accuracy.

[0067] like Figure 4 As shown, the battery pack also includes a guide positioning mechanism 3, which is respectively arranged on the outer side of the bracket body 11 facing away from the battery body, and the guide positioning mechanism 3 is connected to the reinforcing rib 111. The guide positioning mechanism 3 plays a guiding role in the installation process of the battery pack, and accurately aligns the battery pack with the quick-change bracket at the bottom of the electric vehicle, so that the installation accuracy of the battery pack is higher, and after the battery pack is installed, it abuts against the mounting surface of the locking mechanism of the quick-change bracket on the electric vehicle to prevent the lock shaft 22 from falling off from the side, ensuring stable and reliable locking. At the same time, the two sides of the battery pack have a certain force on the vehicle body in the width direction, which effectively reduces the wear between the battery pack and the vehicle body and increases the service life of the battery pack. And the guide positioning mechanism 3 is connected to the reinforcing rib 111 with high strength to achieve a more stable and reliable connection.

[0068] The guide positioning mechanism 3 includes a positioning block 31 and a plurality of fastening components 32. A plurality of through holes 118 are correspondingly provided on the bracket body 11 and the reinforcing ribs 111. A plurality of connecting holes 121 are provided on the thickened portion 12. The fastening components 32 pass through the through holes 118 and are connected to the connecting holes 121. The fastening components 32 will pass through the through holes 118 on the positioning block 31, the bracket body 11 and the reinforcing ribs 111, and the fastening components 32 are connected to the connecting holes 121 on the thickened portion 12, so that the positioning block 31 is installed and connected to the side wall bracket 1 through the plurality of fastening components 32, thereby realizing that the guide positioning mechanism 3 is installed and connected to the bracket body 11, the reinforcing ribs 111 and the thickened portion 12, further realizing a more stable and reliable connection, and greatly improving the safety and stability of the battery pack. At the same time, the structure is simple and the installation and setting are very convenient. Specifically, there are four fastening components 32 , which are respectively installed and connected at the four corners of the positioning block 31 ; the upper two fastening components 32 are connected to the upper reinforcing rib 1111 , and the lower two fastening components 32 are connected to the lower reinforcing rib 1112 .

[0069] In the prior art, the side wall bracket 1 is installed and connected in the quick-change bracket through the lock connection structure 2, so that there is a large gap between the side wall bracket 1 and the quick-change bracket, and impurities such as sand, stone, and water can easily enter the gap and contact the lock connection structure 2, causing wear of the lock connection structure 2 and affecting the locking accuracy. Therefore, the present application also provides at least one of the following embodiments to at least solve the above problems.

[0070] like Figure 3 and Figure 4 As shown, the side wall bracket 1 also includes a protective plate 13, one end of the protective plate 13 is connected to the outer side of the bracket body 11 facing away from the battery body, and the other end of the protective plate 13 extends outward in the horizontal direction. The battery pack is installed in the quick-change bracket at the bottom of the electric vehicle, and there is a gap between the battery pack and the quick-change bracket. The protective plate 13 is connected to the outer side of the bracket body 11 facing away from the battery body and extends outward. The protective plate 13 has a protective shielding function. The protective plate 13 will be used to shield the gap between the battery pack and the quick-change bracket, effectively preventing impurities from entering the gap between the battery pack and the quick-change bracket, greatly improving the safety and stability of the electric vehicle.

[0071] The width of the protective plate 13 extending outward is smaller than the thickness of the guide positioning mechanism 3. The guide positioning mechanism 3 will be located in the quick-change bracket and exert force on the inner wall surface of the quick-change bracket to achieve precise positioning. The width of the protective plate 13 extending outward is smaller than the thickness of the guide positioning mechanism 3, so that the protective plate 13 and the inner wall surface of the quick-change bracket will not contact and interfere with each other.

[0072] The protective plate 13 is connected to the bottom of the bracket body 11 and is located below the lock connection structure 2. The protective plate 13 below the lock connection structure 2 can effectively prevent impurities from entering the gap between the bracket body 11 and the quick-change bracket to affect the locking accuracy of the lock connection structure 2, which helps to extend the service life of the lock connection structure 2.

[0073] The protective plate 13 is provided with a notch 131 for the unlocking member to pass through. The lock link on the quick-change bracket will be connected to multiple lock bases and used to lock the lock shaft 22 on the battery pack in the lock groove of the lock base. By providing the notch 131 on the protective plate 13, the unlocking member will extend through the notch 131 to the top of the protective plate 13 and exert force on the lock link, and then the multiple lock shafts 22 will be unlocked, so that the multiple lock shafts 22 can be moved out to the lock groove of the lock base, thereby realizing the disassembly and replacement of the battery pack. The notch 131 effectively avoids interference caused by the protective plate 13, ensures smooth unlocking, and can ensure the normal implementation of the battery replacement operation of the electric vehicle.

[0074] like Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the battery pack also includes a battery box 4, which includes an upper cover 41, a bottom plate 42, a front beam 43 and a rear beam 44. The front beam 43, the rear beam 44 and the two side wall brackets 1 are surrounded to form a frame structure, and the front beam 43 and / or the rear beam 44 have a cavity inside; the upper cover 41 and the bottom plate 42 are respectively arranged on the top and bottom surfaces of the frame structure to form a receiving cavity for accommodating the battery body. The frame structure is formed by the front beam 43, the rear beam 44 and the two side wall brackets 1. The upper cover 41 and the bottom plate 42 are respectively arranged on the top and bottom surfaces of the frame structure to form a closed receiving cavity for accommodating the battery body, so that the battery body is protected by the receiving cavity, effectively preventing external impurities from entering the battery pack and causing damage to the battery body, ensuring the safety and stability of the battery body, and thus improving the service life of the battery body. The front beam 43 and / or the rear beam 44 have a cavity inside, so that the overall weight of the battery pack can be reduced and the material used can be reduced while ensuring that the overall structural strength of the battery pack meets the requirements, thereby achieving the effect of reducing the weight of the battery pack; and the processing technology is simple and the cost is low.

[0075] The battery box 4 also includes a fixing member 45, which is located in the frame structure and connected to the front beam 43, the rear beam 44 and the two side walls. The fixing member 45 has a reinforcing function. By connecting the fixing member 45 to the front beam 43, the rear beam 44 and the two side wall brackets 1, the structural strength of the battery pack is further strengthened, the deformation of the battery pack is effectively avoided, the anti-seismic performance of the battery pack is improved, and the safety and stability of the battery pack are greatly improved. At the same time, the fixing member 45 is located in the frame structure, which makes the structure more compact and does not occupy additional space.

[0076] The fixing member 45 includes transverse ribs and longitudinal ribs that are interlaced and connected to each other. The transverse ribs and longitudinal ribs are intersected and connected to each other, thereby effectively strengthening the internal structural strength of the battery pack. The transverse ribs and longitudinal ribs have an isolation effect, which is safer and more stable, and is convenient for installing and setting structural components in the battery pack. The fixing member 45 has a cavity inside.

[0077] The battery case 4 also includes a thermostat 46, which is arranged on the upper cover 41 and the bottom plate 42, and is used to adjust the temperature in the accommodating cavity. The coolant flows into the thermostat 46, and the thermostat 46 can both lower the temperature in the accommodating cavity and raise the temperature in the accommodating cavity, which is conducive to ensuring that the temperature in the accommodating cavity is at a normal temperature, thereby avoiding affecting the normal operation and performance stability of the components in the accommodating cavity. In particular, when facing extremely cold or extremely hot weather, the thermostat 46 can reduce the impact of the external temperature on the battery pack, which is conducive to increasing the usable scenarios of the battery pack and improving the versatility of the battery pack. When both the upper cover 41 and the bottom plate 42 are provided with the thermostat 46, it is conducive to ensuring the uniformity of the temperature regulation of the battery pack, thereby ensuring the functional integrity of the battery pack and increasing the service life of the battery pack. At the same time, the thermostat 46 is arranged on the upper cover 41 and the bottom plate 42 instead of being arranged inside the battery body, so that the thermostat 46 does not occupy the space resources of the battery body, and the battery body capacity in the accommodating cavity is further increased, the driving range of the electric vehicle is increased, and the structure is more compact and occupies less space. Of course, in other embodiments, the temperature regulating component 46 may be only on the upper cover 41 or only on the bottom plate 42 .

[0078] like Figure 6 , Figure 7 and Figure 8As shown, the thermostat 46 includes a thermostat plate, on which a flow channel is provided, and the flow channel is used to circulate the thermostat medium, so that when the thermostat medium circulates in the flow channel, the surface temperature of the upper cover 41 and the bottom plate 42 can be reduced or increased, so as to reduce or increase the temperature in the accommodating cavity. In addition, the thermostat 46 is configured in a plate shape, which will not occupy too much space in the height direction of the battery box 4, which is conducive to ensuring that the size of the battery box 4 is within a reasonable range. The thermostat connector installed on the front beam 43 is connected to the flow channel of the thermostat 46 through a connecting pipe, so as to control the working mode of the thermostat connector to a liquid cooling mode or a heating mode according to the actual application scenario, so as to control the temperature of the thermostat medium in the flow channel through the thermostat connector, so as to reduce or increase the temperature in the accommodating cavity. Among them, the thermostat medium can be a liquid or a gas or other thermostatic medium.

[0079] like Figure 5 and Figure 6 As shown, the battery box 4 also includes a reinforcing member 47 disposed between the thermostat 46 and the bottom plate 42, one end of the reinforcing member 47 is connected to the bottom plate 42, and the other end of the reinforcing member 47 extends toward the direction close to the battery body, for supporting the battery body. The reinforcing member 47 has high structural strength. The reinforcing member 47 is disposed between the thermostat 46 and the bottom plate 42, and the bottom plate 42 can be reinforced by the reinforcing member 47, thereby improving the strength of the bottom plate 42, thereby reducing the risk of the bottom plate 42 being crushed by the battery body, improving the strength and stability of the bottom plate 42 supporting the battery body, and thus improving the stability and reliability of the placement of the battery body.

[0080] The setting position of the reinforcement 47 can be implemented in the following ways. In the first way, the reinforcement 47 is set at the corresponding position of the frame structure on the bottom plate 42; in the second way, the reinforcement 47 is set at the corresponding position of the fixing member 45 on the bottom plate 42, specifically, the reinforcement 47 can be set at the corresponding position of the transverse rib on the bottom plate 42; in the third way, the reinforcement 47 is set at the corresponding position of the frame structure on the bottom plate 42, and the reinforcement 47 is set at the corresponding position of the fixing member 45 on the bottom plate 42. Preferably, the reinforcement 47 is set at the corresponding position of the frame structure and the fixing member 45 on the bottom plate 42, and extends in a direction away from the frame structure and the fixing member 45. With the above-mentioned structural form, a plurality of reinforcements 47 are arranged at intervals along the extension direction of the bottom plate 42, which further improves the strength of the bottom plate 42, thereby improving the strength and stability of the bottom plate 42 supporting the battery body, and further improving the stability and reliability of the battery body placed in the accommodating cavity. In addition, the connection between the bottom plate 42 and the frame structure and the corresponding position of the fixing member 45 are reinforced by the reinforcing member 47, thereby improving the structural strength of the battery box body.

[0081] like Figure 5 and Figure 6As shown, the reinforcement 47 is arranged at the corresponding position of the frame structure and / or the fixing member 45 on the bottom plate 42, and extends in the direction away from the frame structure and / or the fixing member 45. Specifically, the frame structure is located at the outer edge of the bottom plate 42, and the reinforcement 47 is arranged at the outer edge of the bottom plate 42 and at the corresponding position of the frame structure. The bottom plate 42, the reinforcement 47 and the frame structure are connected, so that the installation connection strength between the bottom plate 42 and the frame structure is effectively strengthened by the reinforcement 47, and the safety and stability are higher. At the same time, the reinforcement 47 is arranged at the corresponding position of the fixing member 45 on the bottom plate 42, and the projection of the fixing member 45 in the height direction of the battery pack, the reinforcement 47 can cover the fixing member 45, and the bottom plate 42, the reinforcement 47 and the fixing member 45 are connected, so that the installation connection strength between the bottom plate 42 and the fixing member 45 is effectively strengthened by the reinforcement 47, and the safety and stability are higher.

[0082] The battery box 4 also includes a buffer 48, which is disposed between the temperature regulating member 46 and the bottom plate 42. The buffer 48 can provide a buffer for the battery body to prevent the battery body from being damaged by collision during transportation, thereby further improving the safety and service life of the battery body. The buffer 48 can be a buffer foam, and the material of the buffer 48 can be adjusted according to actual needs, and is not limited here.

[0083] In a specific embodiment, Figure 6 As shown, the lower plate structure of the battery box 4 includes: a bottom plate 42 at the lower layer, a buffer 48 and a reinforcement 47 at the middle layer, and a thermostat 46 at the upper layer, wherein the lower side of the thermostat 46 is respectively connected to the reinforcement 47 and the end of the buffer 48 away from the bottom plate 42, and the upper side of the thermostat 46 is connected to the battery body. The reinforcement 47 is laid on the bottom plate 42 at the corresponding position of the frame structure and the fixing member 45, and extends in the direction away from the frame structure and the fixing member 45. The buffer 48 is laid between adjacent reinforcements 47 on the bottom plate 42.

[0084] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A battery pack, characterized in that: The battery pack comprises a battery body, two side wall brackets and a plurality of lock connection structures, the two side wall brackets are respectively connected to two opposite sides of the battery body along the length direction, and the two side wall brackets each comprise a bracket body; A plurality of reinforcing ribs are arranged on the outer side of the bracket body facing away from the battery body. The plurality of reinforcing ribs are arranged at intervals along the length direction of the bracket body, and the locking connection structure is arranged between the reinforcing ribs.

2. The battery pack according to claim 1, characterized in that: The side wall bracket also includes a thickened portion, which is arranged in the bracket body and corresponds to the reinforcing rib on the outer side of the bracket body.

3. The battery pack according to claim 2, characterized in that: The support body has a plurality of weight-reducing cavities, the thickened portion is arranged in the weight-reducing cavity and connected to the inner wall of the support body close to the reinforcing rib, and the lock connection structure passes through the side wall of the support body and is connected to the thickened portion.

4. The battery pack according to claim 3, characterized in that: The bracket body includes an outer shell, at least one transverse partition, at least one longitudinal partition and at least one inclined partition. The battery body and the lock connection structure are respectively connected to two sides of the outer shell. The transverse partition, the longitudinal partition and the inclined partition are all connected to the outer shell and divide the space in the outer shell into a plurality of weight-reducing cavities.

5. The battery pack according to claim 2, characterized in that: The locking connection structure includes a mounting seat, a locking shaft and a supporting shaft, wherein the locking shaft and the supporting shaft are respectively arranged on opposite sides of the mounting seat, and the mounting seat is installed on the bracket body. The locking shaft is connected to the outer side of the mounting seat facing away from the battery body and is used for locking connection with the locking mechanism on the quick-change bracket, and the supporting shaft is connected to the inner side of the mounting seat facing the battery body, and the supporting shaft passes through the side wall of the bracket body and is embedded in the thickened portion.

6. The battery pack according to claim 1, wherein: The bracket body has a first weight-reducing groove recessed inwardly on the outer side facing away from the battery body, the first weight-reducing groove is arranged between two adjacent reinforcing ribs, one end of the lock connection structure extends into the first weight-reducing groove and is connected to the bracket body, and the other end of the lock connection structure is exposed from the outer wall surface of the bracket body and is used for locking connection with the locking mechanism on the quick-change bracket; And / or, the reinforcing ribs include upper reinforcing ribs and lower reinforcing ribs, and the upper reinforcing ribs and the lower reinforcing ribs are connected to the bracket body at intervals along the height direction of the battery body, so that a second weight-reducing groove is formed between the upper reinforcing ribs and the lower reinforcing ribs.

7. The battery pack according to claim 2, characterized in that: The battery pack further comprises a guide and positioning mechanism, wherein the guide and positioning mechanism is respectively arranged on the outer side of the bracket body facing away from the battery body, and the guide and positioning mechanism is connected to the reinforcing rib.

8. The battery pack according to claim 7, characterized in that: The guiding and positioning mechanism includes a positioning block and a plurality of fastening components. A plurality of through holes are correspondingly provided on the bracket body and the reinforcing ribs. A plurality of connecting holes are provided on the thickened portion. The fastening components pass through the through holes and are connected to the connecting holes.

9. The battery pack according to claim 1, characterized in that: The side wall bracket also includes a protective plate, one end of which is connected to the outer side of the bracket body facing away from the battery body, and the other end of the protective plate extends outwardly in a horizontal direction.

10. The battery pack according to claim 9, characterized in that: The protective plate is connected to the bottom of the bracket body and is located below the lock connection structure; And / or, the protective plate is provided with a notch for the unlocking member to pass through; And / or, the outwardly extending width of the protective plate is smaller than the thickness of the guiding and positioning mechanism.

11. The battery pack according to claim 1, wherein: The battery pack also includes a battery case, which includes an upper cover, a bottom plate, a front beam and a rear beam. The front beam, the rear beam and the two side wall brackets together form a frame structure, and the front beam and / or the rear beam have a cavity inside; the upper cover and the bottom plate are respectively arranged on the top and bottom surfaces of the frame structure to form a accommodating cavity for accommodating the battery body.

12. The battery pack according to claim 11, characterized in that: The battery box also includes a fixing member, which is located in the frame structure and connected to the front beam, the rear beam and the two side wall brackets; And / or, the battery box further comprises a temperature regulating component, which is disposed on the upper cover and / or the bottom plate and is used to regulate the temperature in the accommodating cavity.

13. The battery pack according to claim 12, characterized in that: The battery box further includes a reinforcing member disposed between the temperature regulating member and the bottom plate, one end of the reinforcing member being connected to the bottom plate, and the other end of the reinforcing member extending in a direction close to the battery body, for supporting the battery body; And / or, the battery box further includes a buffer component, and the buffer component is arranged between the temperature regulating component and the bottom plate.

14. An electric vehicle, characterized in that: It comprises a battery pack as described in any one of claims 1-13.

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