Battery pack and electric automobile comprising same

Abstract

The invention discloses a battery pack and an electric vehicle comprising the same, the battery pack comprises a battery body and a battery box body, the battery box body comprises a frame structure, a bottom plate and a reinforcing member; the bottom plate is connected to the bottom of the frame structure so as to form an accommodating cavity for accommodating the battery body in the frame structure; and a reinforcing piece is arranged in the accommodating cavity, is connected to the bottom plate and is used for supporting the battery body. According to the battery pack, the battery body is arranged in the accommodating cavity, the battery body can be protected through the accommodating cavity, the service life of the battery body is prolonged, and the battery pack can be assembled into an integral module in the form, so that the battery pack can be conveniently mounted in a module form subsequently. Besides, by adopting the structural form, the reinforcing piece is arranged in the accommodating cavity and is connected to the bottom plate, and the bottom plate can be reinforced through the reinforcing piece, so that the risk that the bottom plate is crushed by the battery body is reduced, and the stability and the reliability of the battery body placed in the accommodating cavity are further improved.

Description

Technical Field

[0001] The present invention relates to a battery pack and an electric vehicle including the same. Background Art

[0002] Electric vehicles have the advantages of zero emissions, low noise, and being very economical in operation and maintenance, and are increasingly favored by users. The energy used by electric vehicles is the electric energy provided by the battery pack carried by themselves. Electric vehicles need to be charged after the electric energy is used up. The battery pack installation methods of electric vehicles are generally divided into fixed type and replaceable type. Among them, the fixed battery pack is generally fixed on the vehicle and directly uses the vehicle as the charging object during charging. The replaceable battery pack is generally fixed on the vehicle bracket by an active installation method, and the battery pack can be removed for separate replacement or charging operations. After the replaced battery pack is fully charged, it is reinstalled on the vehicle.

[0003] The existing battery pack includes a battery body and a battery box. The side walls around the battery box are all made of sheet metal and welded to each other. The battery body is installed in the battery box. However, due to the insufficient overall strength of the battery box, when the battery body is placed in the battery box, the phenomenon of crushing inside the battery box occurs, resulting in the battery body falling off from the battery box, increasing the risk of damage to the battery body. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defect in the prior art that due to the insufficient overall strength of the battery box, when the battery body is placed in the battery box, the phenomenon of crushing inside the battery box occurs, resulting in the battery body falling off from the battery box, increasing the risk of damage to the battery body, and to provide a battery pack and an electric vehicle including the same.

[0005] The present invention solves the above technical problem through the following technical solutions:

[0006] The present invention discloses a battery pack, which includes a battery body and a battery box. The battery box includes a frame structure, a bottom plate, and a reinforcing member; the bottom plate is connected to the bottom of the frame structure to form an accommodation cavity for accommodating the battery body within the frame structure;

[0007] The reinforcing member is disposed in the accommodation cavity and is connected to the bottom plate for supporting the battery body.

[0008] In this solution, the battery body is disposed in the accommodation cavity, which can protect the battery body through the accommodation cavity, extend the service life of the battery body, and the above form can assemble the battery pack into an integral module, facilitating the subsequent installation of the battery pack in the form of a module. Additionally, with the above structural form, a reinforcing member is disposed in the accommodation cavity and connected to the bottom plate, and the reinforcing member can strengthen the bottom plate, improving the strength of the bottom plate, thereby reducing the risk of the bottom plate being crushed by the battery body, enhancing the strength and stability of the bottom plate for supporting the battery body, and further improving the stability and reliability of the battery body placed in the accommodation cavity.

[0009] Preferably, the reinforcing member includes a first reinforcing portion and a first supporting portion. The first reinforcing portion is connected to the bottom plate. The first supporting portion is connected to the first reinforcing portion and extends from the first reinforcing portion toward the battery body. The first supporting portion is used to support the battery body.

[0010] Preferably, a first cavity is formed on the reinforcing member. The number of the first supporting portions is multiple, and the multiple first supporting portions are spaced along the extending direction of the first reinforcing portion to form the first cavity between two adjacent first supporting portions.

[0011] In this solution, with the above structural form, the first reinforcing portion is connected to the bottom plate, and the first supporting portion abuts against the battery body. The battery body can be supported by the first reinforcing portion and the first supporting portion on the bottom plate, thereby improving the strength and stability of the bottom plate for supporting the battery body, and further enhancing the stability and reliability of the battery body placed in the accommodation cavity. Additionally, a first cavity is formed on the first supporting portion, reducing the weight and usage cost of the reinforcing member while ensuring the overall structural strength.

[0012] Preferably, the reinforcing member further includes a second reinforcing portion and a second supporting portion. The second reinforcing portion is connected to the first supporting portion. One end of the second supporting portion is connected to the second reinforcing portion, and the other end of the second supporting portion extends toward the bottom plate for connection with the bottom plate.

[0013] Preferably, the number of the second supporting portions is multiple, and the multiple second supporting portions are spaced along the extending direction of the second reinforcing portion to form the first cavity between two adjacent second supporting portions.

[0014] In this solution, adopting the above structural form, through the second strengthening part and the second supporting part, while further enhancing the strength of the bottom plate, the strength of the first strengthening part and the first supporting part is also improved, thereby further enhancing the strength and stability of the bottom plate for supporting the battery body, and further improving the stability and reliability of the battery body placed in the accommodating cavity. Additionally, a first cavity is formed between two adjacent second supporting parts, which reduces the weight and usage cost of the strengthening member while ensuring the overall structural strength.

[0015] Preferably, the strengthening member further includes a third strengthening part, and the third strengthening part is connected to the first supporting part close to the frame structure. One end of the first supporting part close to the battery body is connected to the third strengthening part, and the other end is connected to the first strengthening part.

[0016] In this solution, adopting the above structural form, through the third strengthening part, the overall strength of the strengthening member close to the frame structure is improved, thereby further enhancing the strength and stability of the bottom plate for supporting the battery body, and further improving the stability and reliability of the battery body placed in the accommodating cavity. At the same time, the connection between the frame structure and the bottom plate can also be strengthened, thereby further enhancing the stability of the battery box body.

[0017] Preferably, the strengthening member further includes a protrusion, and the protrusion is connected to the side of the third strengthening part away from the first supporting part and extends from the third strengthening part towards the direction close to the battery body. The protrusion is used to support the battery body.

[0018] In this solution, adopting the above structural form, the support of the strengthening member for the battery body is achieved through the protrusion.

[0019] Preferably, the battery pack further includes a connecting member. At least one of the first supporting parts away from the frame structure is provided with a first through hole, and the bottom plate is provided with a second through hole. The first through hole and the second through hole are connected through the connecting member.

[0020] In this solution, the connection between the strengthening member away from the frame structure and the bottom plate is achieved through the connecting member. Additionally, adopting the above structural form facilitates the connection between the strengthening member and the bottom plate.

[0021] Preferably, the number of the strengthening members is multiple, and the multiple strengthening members are arranged at intervals along the extending direction of the bottom plate;

[0022] And / or, the strengthening member is arranged at the corresponding position of the frame structure and / or the fixing member on the bottom plate and extends in the direction away from the frame structure and / or the fixing member.

[0023] In this solution, adopting the above structural form, multiple reinforcing members are arranged at intervals along the extending direction of the bottom plate, so as to further improve the strength of the bottom plate, thereby enhancing the strength and stability of the bottom plate for supporting the battery body, and further improving the stability and reliability of the battery body placed in the accommodating cavity. In addition, by strengthening the connection between the bottom plate and the frame structure and the corresponding positions of the fixing members through the reinforcing members, the structural strength of the battery box body is improved.

[0024] Preferably, the battery box body further includes an upper cover and a temperature regulating member, and the temperature regulating member is arranged on the upper cover and / or the bottom plate for regulating the temperature in the accommodating cavity;

[0025] And / or, the battery pack further includes a buffer member, and the buffer member is arranged between the temperature regulating member and the bottom plate.

[0026] In this solution, adopting the above structural form, by arranging the temperature regulating member on the upper cover and / or the bottom plate, the temperature in the accommodating cavity can be regulated through the temperature regulating member. The temperature regulating member can not only lower the temperature in the accommodating cavity but also raise the temperature in the accommodating cavity, which is beneficial 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. Especially when facing extremely cold or extremely hot weather, the temperature regulating member can reduce the influence of the external air temperature on the battery pack, which is beneficial to increasing the available scenarios of the battery pack and improving the versatility of the battery pack. When both the upper cover and the bottom plate are provided with temperature regulating members, it is beneficial to ensure the uniformity of temperature regulation of the battery pack, and further ensure the integrity of the functions of the battery pack and extend the service life of the battery pack.

[0027] In addition, the buffer member can provide buffering for the battery body to prevent the battery body from being damaged by collision during transportation, thereby further improving the use safety and service life of the battery body.

[0028] Preferably, one side of the temperature regulating member is connected to the reinforcing member and the end of the buffer member away from the bottom plate, and the other side is connected to the battery body.

[0029] In this solution, adopting the above structural form, the temperature regulating member is arranged on the side of the buffer member and the reinforcing member close to the battery body, which improves the efficiency of the temperature regulating member in regulating the temperature of the battery body in the accommodating cavity.

[0030] Preferably, a groove is formed on the first surface of the bottom plate close to the battery body, and the groove is used for accommodating the reinforcing member.

[0031] In this solution, adopting the above structural form, it is convenient to place the reinforcing member.

[0032] Preferably, the battery box body further includes a front beam, a rear beam and two side walls. The front beam and the rear beam are respectively connected to the front and rear ends of the two side walls, so that a frame structure is enclosed between the front beam, the rear beam and the two side walls; the interiors of the front beam, the rear beam and the two side walls all have second cavities.

[0033] In this solution, adopting the above structural form, the battery body can be protected through the frame structure, improving the service life of the battery body. In addition, the interiors of the front beam, the rear beam and the two side walls all have second cavities, so that while ensuring that the overall structural strength of the battery pack meets the requirements, the material usage is reduced, achieving the weight reduction effect of the battery pack.

[0034] Preferably, the battery box body further includes a fixing member. The fixing member is located within the frame structure and is connected to the front beam, the rear beam and the two side walls.

[0035] In this solution, adopting the above structural form, the self-structural strength of the battery box body can be effectively enhanced through the fixing member, effectively avoiding the deformation of the battery pack, improving the seismic performance of the battery pack, and greatly improving the safety and stability of the battery pack. At the same time, the fixing member is located within the frame structure, making the structure more compact and not occupying extra space.

[0036] Preferably, the fixing member includes a transverse rib and a longitudinal rib that are connected to each other in an interlaced manner;

[0037] And / or, the interior of the fixing member has a third cavity.

[0038] In this solution, the fixing member includes a transverse rib and a longitudinal rib that are connected to each other in an interlaced manner, which has the characteristics of simple structure and convenient processing and manufacturing, reducing the usage cost. At the same time, adopting the above structural form, a third cavity is opened inside the fixing member to reduce the material usage and achieve the weight reduction effect of the battery pack.

[0039] Preferably, the battery pack further includes a plurality of functional components. The battery box body further includes a plurality of mounting seats. A plurality of mounting openings are formed on the frame structure. The mounting seats are embedded in the mounting openings, and the functional components are connected to the mounting seats;

[0040] Preferably, the functional components include an electrical connector, a liquid cooling connector and at least one pressure relief valve. The electrical connector and the liquid cooling connector are both connected to the frame structure, and each of the pressure relief valves is respectively connected to the frame structure.

[0041] In this solution, the mounting base is embedded into the mounting opening and connected to the frame structure, and the functional components are installed through the mounting base, so as to stably install the functional components on the frame structure, ensuring the installation strength requirements of the functional components, thereby effectively improving the connection stability of the overall structure of the battery pack and the seismic performance of the battery pack.

[0042] In addition, adopting the above structural form, both the electrical connector and the liquid cooling connector are connected to the front beam. The electrical connector and the liquid cooling connector are respectively inserted into or disconnected from the vehicle-end electrical connector and the vehicle-end liquid cooling connector on the electric vehicle, so as to realize insertion and disconnection synchronously, making the insertion between the electrical connector and the liquid cooling connector and the vehicle-end electrical connector and the vehicle-end liquid cooling connector on the electric vehicle more stable and reliable, effectively avoiding the problem of unstable connection; and making the overall structure of the battery pack more compact. At the same time, by installing a pressure relief valve on the front beam and / or the rear beam, the front end and / or the rear end in the battery pack can be depressurized, effectively preventing the internal pressure of the battery pack from being too high, and having higher safety and stability.

[0043] The present invention further discloses an electric vehicle, which includes the battery pack described in any one of the above.

[0044] In this solution, the battery pack is applied to the electric vehicle, so that the battery body can be arranged in the accommodation cavity, and the battery body can be protected through the accommodation cavity, improving the service life of the battery body. And the above form can assemble the battery pack into an overall module, facilitating the subsequent installation of the battery pack in the form of a module. In addition, adopting the above structural form, a reinforcing member is arranged in the accommodation cavity and connected to the bottom plate, and the bottom plate can be strengthened through the reinforcing member, improving the strength of the bottom plate, thereby reducing the risk of the bottom plate being crushed by the battery body, improving the strength and stability of the bottom plate for supporting the battery body, and further improving the stability and reliability of the battery body placed in the accommodation cavity.

[0045] The positive and progressive effects of the present invention are as follows:

[0046] The battery body is arranged in the accommodation cavity, and the battery body can be protected through the accommodation cavity, improving the service life of the battery body. And the above form can assemble the battery pack into an overall module, facilitating the subsequent installation of the battery pack in the form of a module. In addition, adopting the above structural form, a reinforcing member is arranged in the accommodation cavity and connected to the bottom plate, and the bottom plate can be strengthened through the reinforcing member, improving the strength of the bottom plate, thereby reducing the risk of the bottom plate being crushed by the battery body, improving the strength and stability of the bottom plate for supporting the battery body, and further improving the stability and reliability of the battery body placed in the accommodation cavity. Description of the Drawings

[0047] Figure 1Schematic diagram of the battery pack according to an embodiment of the present invention;

[0048] Figure 2 Schematic diagram of the battery box according to an embodiment of the present invention;

[0049] Figure 3 Schematic diagram of the battery box according to an embodiment of the present invention;

[0050] Figure 4 Partial schematic diagram of the structure of the battery box according to an embodiment of the present invention;

[0051] Figure 5 Partial perspective view of the structure of the battery box according to an embodiment of the present invention;

[0052] Figure 6 Partial schematic diagram of the battery box according to an embodiment of the present invention;

[0053] Figure 7 Partial three-dimensional structure schematic diagram of the battery box according to an embodiment of the present invention;

[0054] Figure 8 Cross-sectional view schematic diagram of the battery box according to an embodiment of the present invention;

[0055] Figure 9 Is Figure 8 Partial enlarged schematic diagram at position A in

[0056] Figure 10 Is Figure 8 Partial enlarged schematic diagram at position B in

[0057] Figure 11 Is Figure 8 Partial enlarged schematic diagram at position C in

[0058] Figure 12 Schematic diagram of the board body at the bottom plate according to an embodiment of the present invention;

[0059] Figure 13 Cross-sectional structure schematic diagram of the temperature control board at the bottom plate according to an embodiment of the present invention;

[0060] Figure 14 Schematic diagram of the board body at the upper cover according to an embodiment of the present invention;

[0061] Figure 15 Cross-sectional structure schematic diagram of the temperature control board at the upper cover according to an embodiment of the present invention.

[0062] Explanation of reference numerals:

[0063] Battery pack 100, battery box body 1, frame structure 11, mounting opening 111, second through hole 112, bottom plate 12, groove 121, protrusion 122, accommodation cavity 14, upper cover 15, temperature regulating member 16, temperature regulating plate 161, flow channel 1611, plate body 1612, protection plate 1613, buffer member 17, front beam 18, rear beam 19, side wall 20, mounting seat 31, reinforcing member 2, first reinforcing portion 21, first supporting portion 22, first through hole 221, first cavity 23, second reinforcing portion 24, second supporting portion 25, third reinforcing portion 26, protrusion 27, connecting member 3, fixing member 4, transverse rib 42, longitudinal rib 41, functional component 5, electrical connector 51, liquid cooling connector 52, pressure relief valve 53. Detailed implementation manners

[0064] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0065] As Figures 1 to 15 shown, this embodiment provides a battery pack 100. The battery pack 100 includes a battery body and a battery box body 1. The battery box body 1 includes a frame structure 11, a bottom plate 12, and a reinforcing member 2. The bottom plate 12 is connected to the bottom of the frame structure 11 to form an accommodation cavity 14 for accommodating the battery body within the frame structure 11. In addition, a reinforcing member 2 is provided within the accommodation cavity 14. The reinforcing member 2 is connected to the bottom plate 12 and is used to support the battery body. Specifically, by disposing the battery body within the accommodation cavity 14, the battery body can be protected through the accommodation cavity 14, improving the service life of the battery body. Moreover, the above form can assemble the battery pack 100 into an integral module, facilitating subsequent installation of the battery pack 100 in module form. Additionally, adopting the above structural form, by providing a reinforcing member 2 within the accommodation cavity 14 and connecting the reinforcing member 2 to the bottom plate 12, the bottom plate 12 can be strengthened by the reinforcing member 2, improving the strength of the bottom plate 12, thereby reducing the risk of the bottom plate 12 being crushed by the battery body, enhancing the strength and stability of the bottom plate 12 in supporting the battery body, and further improving the stability and reliability of the battery body placed within the accommodation cavity 14.

[0066] During specific use, the number of the reinforcing members 2 is multiple, and the multiple reinforcing members 2 are spaced apart along the extending direction of the bottom plate 12. As Figure 8 shown, this embodiment takes the number of the reinforcing members 2 being three as an example for adaptive expression. In other embodiments, the number of the reinforcing members 2 can be limited according to actual requirements and will not be specifically limited herein.

[0067] In this embodiment, the reinforcing member 2 is connected to the upper surface of the bottom plate 12 to facilitate the support of the battery body by the reinforcing member 2. Additionally, in this embodiment, the material of the reinforcing member 2 is a profile. In other embodiments, the material of the reinforcing member 2 can be adjusted according to actual requirements and is not limited herein.

[0068] Please refer to Figures 4 to 11 for understanding. The reinforcing member 2 includes a first reinforcing portion 21 and a first supporting portion 22. The first reinforcing portion 21 is connected to the bottom plate 12, and the first supporting portion 22 is connected to the first reinforcing portion 21 and extends from the first reinforcing portion 21 towards the direction close to the battery body. The first supporting portion 22 is used to support the battery body. With the above structural form, by connecting the first reinforcing portion 21 to the bottom plate 12 and abutting the first supporting portion 22 against the battery body, the battery body can be supported by the first reinforcing portion 21 and the first supporting portion 22 on the bottom plate, thereby improving the strength and stability of the bottom plate 12 in supporting the battery body, and further enhancing the stability and reliability of the battery body placed in the accommodating cavity 14. Specifically, in this embodiment, the lower surface of the first reinforcing portion 21 is connected to the upper surface of the bottom plate 12, and the first supporting portion 22 is connected to the upper surface of the first reinforcing portion 21, so that the reinforcing member 2 can support the battery body through the first supporting portion 22.

[0069] To improve the structural strength of the reinforcing member 2, it is preferred that the first reinforcing portion 21 and the first supporting portion 22 are integrally formed. In other embodiments, the first reinforcing portion 21 and the first supporting portion 22 can also be separately provided. Thus, if one of the first reinforcing portion 21 and the first supporting portion 22 is damaged, only the damaged first reinforcing portion 21 and first supporting portion 22 need to be replaced to be used normally, reducing the usage cost.

[0070] To reduce the weight and usage cost of the reinforcing member 2, it is preferred that a first cavity 23 is formed on the reinforcing member 2. The number of the first supporting portions 22 is multiple, and the multiple first supporting portions 22 are arranged at intervals along the extending direction of the first reinforcing portion 21 to form the first cavity 23 between two adjacent first supporting portions 22.

[0071] In this embodiment, the number of the first supporting portions 22 is greater than four, so that multiple first cavities 23 can be formed, thereby reducing the weight and usage cost of the reinforcing member 2 while ensuring the overall structural strength. In other embodiments, the specific number of the first supporting portions 22 can be adjusted according to actual requirements and is not limited herein.

[0072] Please refer to Figures 4 to 11It is understood that the reinforcing member 2 further includes a second reinforcing portion 24 and a second supporting portion 25. The second reinforcing portion 24 is connected to the first supporting portion 22. One end of the second supporting portion 25 is connected to the second reinforcing portion 24, and the other end of the second supporting portion 25 extends towards the bottom plate 12 for connection with the bottom plate 12. With the above structural form, through the second reinforcing portion 24 and the second supporting portion 25, while further improving the strength of the bottom plate 12, the strength of the first reinforcing portion 21 and the first supporting portion 22 is also improved, thereby further enhancing the strength and stability of the bottom plate 12 for supporting the battery body, and further improving the stability and reliability of the battery body placed in the accommodating cavity 14.

[0073] In this embodiment, as Figure 6 , Figure 7 and Figure 11 shown, for the first supporting portion 22 and the first reinforcing portion 21 close to the frame structure 11, the second reinforcing portion 24 is connected to the first supporting portion 22 that is the farthest from the frame structure 11 among the plurality of first supporting portions 22. Further, as Figure 6 , Figure 7 and Figure 11 shown, for the first supporting portion 22 and the first reinforcing portion 21 close to the frame structure 11, the second reinforcing portion 24 is connected to the middle position of the first supporting portion 22, thereby reducing the height of the second supporting portion 25, and further improving the stability and reliability of the second supporting portion 25 for supporting the bottom plate 12. Additionally, with the above structural form, the second reinforcing portion 24 is connected to the middle position of the first supporting portion 22, which can make way for the buffer member 17, such that the second reinforcing portion 24 and the second supporting portion 25 can support part of the buffer member 17. As Figure 5 and Figure 10 shown, for the first supporting portion 22 and the first reinforcing portion 21 far from the frame structure 11, the second reinforcing portion 24 is connected to the first supporting portion 22 that is the farthest from the transverse rib 42 among the plurality of first supporting portions 22. Further, as Figure 5 and Figure 10 shown, the second reinforcing portion 24 is connected to the position of the side wall 20 of the first supporting portion 22 close to the top wall, so that the battery body can be supported by the second reinforcing portion 24.

[0074] The number of the second supporting portions 25 is multiple, and the multiple second supporting portions 25 are arranged at intervals along the extending direction of the second reinforcing portion 24 to form a first cavity 23 between two adjacent second supporting portions 25. With the above structural form, while ensuring the overall structural strength, the weight and usage cost of the reinforcing member 2 are reduced.

[0075] In this embodiment, the number of the second support portions 25 is greater than four, so that a plurality of first cavities 23 can be formed, thereby reducing the weight and usage cost of the reinforcing member 2 while ensuring the overall structural strength. In other embodiments, the specific number of the second support portions 25 can be adjusted according to actual requirements and will not be limited herein.

[0076] In addition, in this embodiment, the second reinforcing portion 24 and the second support portion 25 are integrally formed. In other embodiments, the second reinforcing portion 24 and the second support portion 25 can also be separately provided. Thus, when one of the second reinforcing portion 24 and the second support portion 25 is damaged, only the damaged second reinforcing portion 24 and second support portion 25 need to be replaced to be used normally, reducing the usage cost.

[0077] As Figure 6 、 Figure 7 and Figure 9 shown, the reinforcing member 2 further includes a third reinforcing portion 26. The third reinforcing portion 26 is connected to the first support portion 22 close to the frame structure 11. One end of the first support portion 22 close to the battery body is connected to the third reinforcing portion 26, and the other end is connected to the first reinforcing portion 21. With the above structural form, the overall strength of the reinforcing member 2 close to the frame structure 11 is improved through the third reinforcing portion 26, thereby further improving the strength and stability of the bottom plate 12 for supporting the battery body. Furthermore, the stability and reliability of the battery body placed in the accommodation cavity 14 are improved, and at the same time, the connection portion between the frame structure and the bottom plate 12 can be strengthened, thereby further improving the firmness of the battery box 1.

[0078] During specific use, two adjacent first support portions 22 are respectively connected to the first reinforcing portion 21 and the third reinforcing portion 26 to form a closed first cavity 23 between the two adjacent first support portions 22, thereby further improving the structural strength of the reinforcing member 2.

[0079] To improve the structural strength of the reinforcing member 2, it is preferred that the first reinforcing portion 21, the first support portion 22, and the third reinforcing portion 26 are integrally formed.

[0080] Please refer to Figure 7 for understanding. The reinforcing member 2 further includes a protrusion 27. The protrusion 27 is connected to the side of the third reinforcing portion 26 away from the first support portion 22 and extends from the third reinforcing portion 26 towards the direction close to the battery body. The protrusion 27 is used to support the battery body. With the above structural form, the support of the reinforcing member 2 for the battery body is realized through the protrusion 27.

[0081] During specific use, the number of the protrusions 27 is multiple, and the multiple protrusions 27 are arranged at intervals along the extending direction of the third reinforcing portion 26, thereby improving the stability and reliability of the protrusion 27 for supporting the battery body.

[0082] As Figure 2 and Figure 5 shown, the battery pack 100 further includes a connecting member 3. A first through hole 221 is formed in at least one first support portion 22 away from the frame structure 11, and a second through hole 112 is formed in the bottom plate 12. The first through hole 221 and the second through hole 112 are connected by the connecting member 3. With the above structural form, the connection between the reinforcing member 2 away from the frame structure 11 and the bottom plate 12 is realized through the connecting member 3. In addition, with the above structural form, the connection between the reinforcing member 2 and the bottom plate 12 is facilitated.

[0083] In this embodiment, the number of the reinforcing members 2 away from the frame structure 11 is taken as an example for illustrative expression. In other embodiments, the number of the reinforcing members 2 away from the frame structure 11 can be adjusted according to actual needs and is not limited herein. In addition, in this embodiment, the connecting member 3 is a bolt. In other embodiments, the type of the connecting member 3 can also be other forms and is not limited herein.

[0084] When in specific use, as Figure 5 shown, in order to facilitate the connection between the bottom plate 12 and the first support portion 22, it is preferred that a protrusion 122 is provided on the upper surface of the bottom plate 12, and the protrusion 122 is connected to the first support portion 22.

[0085] As Figures 7 to 11 shown, the setting position of the reinforcing member 2 can have the following several implementation manners. The first implementation manner is that the reinforcing member 2 is arranged at the corresponding position of the frame structure 11 on the bottom plate 12; the second implementation manner is that the reinforcing member 2 is arranged at the corresponding position of the fixing member 4 on the bottom plate 12. Specifically, the reinforcing member 2 can be arranged at the corresponding position of the transverse rib 42 on the bottom plate 12; the third implementation manner is that the reinforcing member 2 is arranged at the corresponding position of the frame structure 11 on the bottom plate 12, and the reinforcing member 2 is arranged at the corresponding position of the fixing member 4 on the bottom plate 12. Preferably, the reinforcing member 2 is arranged at the corresponding positions of the frame structure 11 and the fixing member 4 on the bottom plate 12 and extends in a direction away from the frame structure 11 and the fixing member 4. With the above structural form, a plurality of reinforcing members 2 are arranged at intervals along the extending direction of the bottom plate 12, further improving the strength of the bottom plate 12, thereby improving the strength and stability of the bottom plate 12 for supporting the battery body, and further improving the stability and reliability of the battery body placed in the accommodation cavity 14. In addition, by strengthening the connection position between the bottom plate 12 and the frame structure 11 and the corresponding position of the fixing member 4 through the reinforcing member 2, the structural strength of the battery box body is improved.

[0086] As Figure 1 、 Figure 14 and Figure 15As shown in the figure, the battery box body 1 further includes an upper cover 15 and a temperature regulating member 16. There are several implementation manners for the temperature regulating member 16: In the first implementation manner, the temperature regulating member 16 is only provided on the upper cover 15; in the second implementation manner, the temperature regulating member 16 is only provided on the bottom plate 12; in the third implementation manner, the temperature regulating member 16 is provided on the upper cover 15 and the bottom plate 12 to regulate the temperature in the accommodation cavity 14. With the above structural form, by providing the temperature regulating member 16 on the upper cover 15 and the bottom plate 12, the temperature in the accommodation cavity 14 can be regulated by the temperature regulating member 16. The temperature regulating member 16 can not only lower the temperature in the accommodation cavity 14, but also raise the temperature in the accommodation cavity 14, which is beneficial to ensuring that the temperature in the accommodation cavity 14 is at a normal temperature, thereby avoiding affecting the normal operation and performance stability of the components in the accommodation cavity 14. Especially when facing extremely cold or extremely hot weather, the temperature regulating member 16 can reduce the influence of the external air temperature on the battery pack 100, which is beneficial to increasing the available scenarios of the battery pack 100 and improving the versatility of the battery pack 100. When the upper cover 15 and the bottom plate 12 are both provided with the temperature regulating member 16, it is beneficial to ensure the uniformity of the temperature regulation of the battery pack 100, thereby ensuring the integrity of the function of the battery pack 100 and increasing the service life of the battery pack 100.

[0087] As Figures 12 to 15 shown, the temperature regulating plate 161 includes a plate body 1612 and a protection plate 1613. The plate body 1612 is laid on the upper cover 15 and the bottom plate 12; a flow channel 1611 is provided on the side of the plate body 1612 facing away from the upper cover 15 or the bottom plate 12, and the flow channel 1611 is recessed in the direction close to the upper cover 15 or the bottom plate 12; the protection plate 1613 covers at least the recessed area on the plate body 1612 to form a closed flow channel 1611. The plate body 1612 and the protection plate 1613 together form a closed flow channel 1611, which is beneficial to preventing the temperature regulating medium from overflowing. At the same time, using the split plate body 1612 and protection plate 1613 to install and form the temperature regulating plate 161 is beneficial to improving the convenience during manufacturing. If a closed flow channel 1611 is directly opened in the integral temperature regulating plate 161, the manufacturing difficulty is high.

[0088] During specific use, the temperature regulating member 16 can raise or lower the temperature of the battery body. In this embodiment, the temperature lowering member is a liquid cooling plate, so that the temperature in the accommodation cavity 14 can be lowered through the liquid cooling plate. In other embodiments, the temperature regulating member 16 can also be in other forms, which are not limited herein.

[0089] As Figure 6 shown, the battery pack 100 further includes a buffer member 17. The buffer member 17 is arranged between the temperature regulating member 16 and the bottom plate 12, so as to provide buffering for the battery body and prevent the battery body from being damaged by collision during transportation, thereby further improving the use safety and service life of the battery body.

[0090] In this embodiment, the buffer member 17 is a buffer foam. In other embodiments, the type of the buffer member 17 can be adjusted according to actual requirements and will not be limited herein.

[0091] As Figure 6 shown, one side of the temperature regulating member 16 is connected to the reinforcing member 2 and the end of the buffer member 17 away from the bottom plate 12, and the other side is connected to the battery body. With the above structural form, the temperature regulating member 16 is arranged on the side of the buffer member 17 and the reinforcing member 2 close to the battery body, improving the efficiency of the temperature regulating member 16 in regulating the temperature of the battery body in the accommodating cavity 14. In this embodiment, the temperature regulating member 16 is in direct contact with the battery body, thereby further improving the efficiency of the temperature regulating member 16 in regulating the temperature of the battery body in the accommodating cavity 14.

[0092] In a specific embodiment, as Figure 6 shown, the lower plate structure of the battery box body 1 includes: the bottom plate 12 at the lower layer, the buffer member 17 and the reinforcing member 2 at the middle layer, and the temperature regulating member 16 at the upper layer. Among them, the lower side of the temperature regulating member 16 is respectively connected to the reinforcing member 2 and the end of the buffer member 17 away from the bottom plate 12, and the upper side of the temperature regulating member 16 is connected to the battery body. The reinforcing member 2 is laid on the corresponding positions of the frame structure 11 and the fixing member 4 on the bottom plate 12 and extends in a direction away from the frame structure 11 and the fixing member 4. The buffer member 17 is laid between adjacent reinforcing members 2 on the bottom plate 12.

[0093] As Figure 6 and Figure 7 shown, a groove 121 is formed on the first surface of the bottom plate 12 close to the battery body, and the groove 121 is used to accommodate the reinforcing member 2. With the above structural form, it is convenient to place the reinforcing member 2. Specifically, the four sides of the bottom plate 12 are all connected to the frame structure 11 by bolts, and the groove 121 is formed on the part of the upper surface of the bottom plate 12 away from the four sides.

[0094] In this embodiment, the groove 121 is formed by stamping the bottom plate 12, thereby improving the strength of the bottom plate 12. In other embodiments, the processing method of the groove 121 can be adjusted according to actual requirements and will not be limited herein.

[0095] As Figure 1 and Figure 2As shown, the battery box body 1 further includes a front beam 18, a rear beam 19 and two side walls 20. The front beam 18 and the rear beam 19 are respectively connected to the front and rear ends of the two side walls 20, so that a frame structure 11 is formed by enclosing between the front beam 18, the rear beam 19 and the two side walls 20. The front beam 18, the rear beam 19 and the two side walls 20 all have a second cavity inside. With the above structural form, the battery body can be protected by the frame structure 11, improving the service life of the battery body. In addition, since the front beam 18, the rear beam 19 and the two side walls 20 all have a second cavity inside, under the condition that the overall structural strength of the battery pack 100 meets the requirements, the material used is reduced, achieving the weight reduction effect of the battery pack 100.

[0096] As Figure 3 As shown, the battery box body 1 further includes a fixing member 4. The fixing member 4 is located inside the frame structure 11 and is connected to the front beam 18, the rear beam 19 and the two side walls 20. With the above structural form, the self-structural strength of the battery box body 1 can be effectively enhanced through the fixing member 4, effectively avoiding the deformation of the battery pack 100, improving the seismic performance of the battery pack 100, and greatly enhancing the safety and stability of the battery pack 100. At the same time, since the fixing member 4 is located inside the frame structure 11, the structure is more compact and does not occupy extra space.

[0097] The fixing member 4 includes a transverse rib 42 and a longitudinal rib 41 that are connected in an interlaced manner, and the above structural form has the characteristics of simple structure and convenient processing and manufacturing, reducing the use cost. In this embodiment, the number of longitudinal ribs 41 is one, and the number of transverse ribs 42 is two. The longitudinal rib 41 and one of the transverse ribs 42 are connected in a cross shape, and the other transverse rib 42 is connected to one end of the longitudinal rib 41, thereby further enhancing the structural strength and stability of the fixing member 4.

[0098] In addition, in this embodiment, the reinforcing member 2 is provided at the corresponding positions of the front beam 18, the rear beam 19 and the transverse rib 42 of the fixing member 4 on the bottom plate 12. Specifically, for the reinforcing member 2 provided at the corresponding positions of the front beam 18 and the rear beam 19 on the bottom plate 12, the reinforcing member 2 is connected to the front beam 18 and the rear beam 19, so that the connection positions between the bottom plate 12 and the front beam 18 and the rear beam 19 can be strengthened through the reinforcing member 2. For the reinforcing member 2 provided at the corresponding position of the transverse rib 42 of the fixing member 4 on the bottom plate 12, in the projection in the height direction of the battery pack 100, the reinforcing member 2 can cover the transverse rib 42, so that the connection positions between the transverse rib 42 and the side wall 20 and the bottom plate 12 can be strengthened through the reinforcing member 2, thereby enhancing the structural strength of the battery box body 1.

[0099] In order to reduce the weight and use cost of the fixing member 4 and achieve the weight reduction effect of the battery pack 100, it is preferred that the fixing member 4 has a third cavity inside.

[0100] As shown Figure 1 in FIG. 1, the battery pack 100 further includes a plurality of functional components 5, the battery box body 1 further includes a plurality of mounting seats 31, a plurality of mounting openings 111 are formed on the frame structure 11, the mounting seats 31 are embedded in the mounting openings 111, and the functional components 5 are connected to the mounting seats 31. With the above structural form, the mounting seats 31 are embedded into the mounting openings 111 and connected to the frame structure 11, and the functional components 5 are mounted through the mounting seats 31, so as to stably mount the functional components 5 on the frame structure 11, ensuring the mounting strength requirements of the functional components 5, thereby effectively improving the connection stability of the overall structure of the battery pack 100 and the seismic performance of the battery pack 100. In addition, with the above structural form, both the electrical connector 51 and the liquid cooling connector 52 are connected to the front beam 18, and the electrical connector 51 and the liquid cooling connector 52 are respectively plugged into or disconnected from the vehicle-end electrical connector and the vehicle-end liquid cooling connector on the electric vehicle, so as to synchronously achieve plugging and disconnection, making the plugging between the electrical connector and the liquid cooling connector and the vehicle-end electrical connector and the vehicle-end liquid cooling connector on the electric vehicle more stable and reliable, effectively avoiding the problem of unstable connection; and making the overall structure of the battery pack more compact. At the same time, by installing and setting a pressure relief valve 53 on the front beam 18 and / or the rear beam 19, the front end and / or the rear end of the battery pack 100 can be depressurized, effectively preventing the internal pressure of the battery pack 100 from being too high, and the safety and stability are higher.

[0101] The functional components 5 include an electrical connector 51, a liquid cooling connector 52 and at least one pressure relief valve 53. The electrical connector 51 and the liquid cooling connector 52 are both connected to the frame structure 11, and each pressure relief valve 53 is respectively connected to the frame structure 11. With the above structural form, the electrical connection, liquid cooling and temperature reduction of the battery pack 100 are realized, and the internal pressure is prevented from being too high, and the safety and stability are higher.

[0102] This embodiment further provides an electric vehicle, which includes the battery pack 100 as described in any one of the above. Specifically, by applying the battery pack 100 to the electric vehicle, the battery body can be disposed in the accommodation cavity 14, and the battery body can be protected through the accommodation cavity 14, improving the service life of the battery body, and the above form can assemble the battery pack 100 into an integral module, facilitating the subsequent installation of the battery pack 100 in the form of a module. In addition, with the above structural form, a reinforcing member 2 is disposed in the accommodation cavity 14 and the reinforcing member 2 is connected to the bottom plate 12, and the bottom plate 12 can be strengthened through the reinforcing member 2, improving the strength of the bottom plate 12, thereby reducing the risk of the bottom plate 12 being crushed by the battery body, improving the strength and stability of the bottom plate 12 for supporting the battery body, and further improving the stability and reliability of the battery body placed in the accommodation cavity 14.

[0103] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only an example. The protection scope of the present invention is defined by the appended claims. Without departing from the principle and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A battery pack, characterized in that, The battery pack includes a battery body and a battery box body. The battery box body includes a frame structure, a bottom plate, and a reinforcing member. The bottom plate is connected to the bottom of the frame structure to form a receiving cavity for receiving the battery body within the frame structure. The reinforcing member is disposed in the receiving cavity and is connected to the bottom plate for supporting the battery body.

2. The battery pack according to claim 1, characterized in that, The reinforcing member includes a first reinforcing portion and a first supporting portion. The first reinforcing portion is connected to the bottom plate. The first supporting portion is connected to the first reinforcing portion and extends from the first reinforcing portion towards the battery body. The first supporting portion is used for supporting the battery body. Preferably, a first cavity is formed on the reinforcing member. The number of the first supporting portions is multiple, and the multiple first supporting portions are spaced along the extending direction of the first reinforcing portion to form the first cavity between two adjacent first supporting portions.

3. The battery pack according to claim 2, characterized in that The reinforcing member further includes a second reinforcing portion and a second supporting portion. The second reinforcing portion is connected to the first supporting portion. One end of the second supporting portion is connected to the second reinforcing portion, and the other end of the second supporting portion extends towards the bottom plate for connecting with the bottom plate. Preferably, the number of the second supporting portions is multiple, and the multiple second supporting portions are spaced along the extending direction of the second reinforcing portion to form the first cavity between two adjacent second supporting portions. And / or, the reinforcing member further includes a third reinforcing portion. The third reinforcing portion is connected to the first supporting portion close to the frame structure. One end of the first supporting portion close to the battery body is connected to the third reinforcing portion, and the other end is connected to the first reinforcing portion. Preferably, the reinforcing member further includes a protrusion. The protrusion is connected to the side of the third reinforcing portion away from the first supporting portion and extends from the third reinforcing portion towards the battery body. The protrusion is used for supporting the battery body. And / or, the battery pack further includes a connecting member. A first through hole is formed on at least one of the first supporting portions away from the frame structure. A second through hole is formed on the bottom plate. The first through hole and the second through hole are connected by the connecting member.

4. The battery pack according to claim 1, wherein, The number of the reinforcing members is multiple, and the multiple reinforcing members are spaced along the extending direction of the bottom plate. And / or, the reinforcing member is disposed at a corresponding position of the frame structure and / or the fixing member on the bottom plate and extends away from the frame structure and / or the fixing member.

5. The battery pack according to claim 1, characterized in that, The battery box body further includes an upper cover and a temperature regulating member. The temperature regulating member is disposed on the upper cover and / or the bottom plate for regulating the temperature in the receiving cavity. And / or, the battery pack further includes a buffer member. The buffer member is disposed between the temperature regulating member and the bottom plate. Preferably, one side of the temperature regulating member is connected to the reinforcing member and the end of the buffer member away from the bottom plate, and the other side is connected to the battery body.

6. The battery pack according to claim 1, characterized in that, A groove is formed on the first surface of the bottom plate close to the battery body for accommodating the reinforcing member.

7. The battery pack according to claim 1, characterized in that The battery box body further includes a front beam, a rear beam and two side walls. The front beam and the rear beam are respectively connected to the front and rear ends of the two side walls, so that a frame structure is formed by enclosing between the front beam, the rear beam and the two side walls; the interiors of the front beam, the rear beam and the two side walls all have a second cavity.

8. The battery pack according to claim 7, wherein The battery box body further includes a fixing member. The fixing member is located within the frame structure, and the fixing member is connected to the front beam, the rear beam and the two side walls; Preferably, the fixing member includes a transverse rib and a longitudinal rib that are interconnected; and / or, the interior of the fixing member has a third cavity.

9. The battery pack according to claim 1, characterized in that, The battery pack further includes a plurality of functional components. The battery box body further includes a plurality of mounting seats. A plurality of mounting openings are formed in the frame structure. The mounting seats are embedded in the mounting openings, and the functional components are connected to the mounting seats; Preferably, the functional components include an electrical connector, a liquid cooling connector and at least one pressure relief valve. The electrical connector and the liquid cooling connector are both connected to the frame structure, and each of the pressure relief valves is respectively connected to the frame structure.

10. An electric vehicle, characterized in that, It includes the battery pack according to any one of claims 1-9.

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