Battery pack frame and battery pack

Abstract

The utility model provides a battery pack frame and a battery pack, the battery pack frame comprises a front frame, a first connecting frame, a rear frame and a second connecting frame which are sequentially connected end to end, and the first connecting frame and the second connecting frame are used for being fixedly connected with an external assembly; wherein the front frame and the rear frame are both of an integrated punch forming structure, and the first connecting frame and the second connecting frame are both of an integrated roll forming structure. By applying the technical scheme, the technical problems of high production cost and heavy weight in related technologies can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack frames, and particularly relates to a battery pack frame and a battery pack. Background Art

[0002] Currently, the frames of mainstream battery boxes usually adopt the aluminum extrusion and welding process. Although the aluminum profile-based box has a high maturity level, the profile shape design is free and variable, and the overall weight is light, the aluminum extrusion process is a high-energy-consuming process. Therefore, the processing cost of the above solution is high. At the same time, aluminum is a non-ferrous metal, and the material cost is also high. In view of the production disadvantages of the above aluminum profile boxes, many enterprises have started to design roll-formed steel boxes. Since the material cost of the roll-formed steel box itself is low, the welding process is mature, and the machining is relatively less, the cost can be about 30% lower than that of the aluminum profile box. However, the weight of the all-steel box is relatively heavy, so it is not convenient for transportation. In addition, the development cost of the roll-forming die is relatively high, which increases the production cost. Summary of the Utility Model

[0003] The embodiments of the utility model provide a battery pack frame and a battery pack, which can improve the technical problems of high production cost and heavy weight in the related art.

[0004] In a first aspect, the embodiments of the utility model provide a battery pack frame, which includes a front frame, a first connection frame, a rear frame, and a second connection frame that are sequentially connected end to end. A plurality of electrical components are arranged on the front frame, and the first connection frame and the second connection frame are used for fixedly connecting with external components. Among them, both the front frame and the rear frame are integrally stamped and formed structures, and both the first connection frame and the second connection frame are integrally roll-formed structures.

[0005] In an embodiment, the first connection frame and / or the second connection frame includes a top wall, a bottom wall, an inner side wall, and an outer side wall that are connected to each other. The outer side wall is connected to the external component, and the top wall, the bottom wall, the inner side wall, and the outer side wall cooperate together to form a cavity.

[0006] In an embodiment, a part of the outer side wall close to the bottom wall protrudes towards the side away from the inner side wall to form a boss structure.

[0007] In an embodiment, the thicknesses of the top wall, the bottom wall, the inner side wall, and the outer side wall are all H, and 1 mm ≤ H ≤ 2 mm.

[0008] In an embodiment, there is a reinforcing part between the inner side wall and the outer side wall. Both ends of the reinforcing part are respectively connected to the side of the inner side wall close to the outer side wall and the side of the outer side wall close to the inner side wall, and the extending direction of the reinforcing part is the same as the extending direction of the top wall.

[0009] In one embodiment, the battery pack frame also includes a partition, and the front frame, the first connecting frame, the rear frame and the second connecting frame together form a accommodating portion. The partition is arranged in the accommodating portion and divides the accommodating portion into a plurality of accommodating sub-portions, which are used to accommodate battery modules.

[0010] In one embodiment, the partition includes a connecting member extending along the length direction of the first connecting frame; a first partition portion arranged at one end of the connecting member, and the first partition portion extends along the length direction of the rear frame; a second partition portion arranged at the other end of the connecting member, and the second partition portion extends along the length direction of the rear frame; a third partition portion arranged in the middle of the connecting member, and the third partition portion extends along the length direction of the rear frame; wherein the two ends of the first partition portion, the second partition portion and the third partition portion are fixedly connected to the first connecting frame and the second connecting frame, respectively.

[0011] In one embodiment, the third blocking portion is a split structure and is symmetrically arranged on both sides of the connecting member along the length direction of the rear frame.

[0012] In one embodiment, the partition further includes a fixing member, and the first blocking portion and the connecting member and / or the second blocking portion and the connecting member are fixedly connected via the fixing member.

[0013] In one embodiment, the first barrier portion and / or the second barrier portion has a first through hole on the side facing the front frame, the first through hole extends along the length direction of the first connecting frame, the connecting member has a second through hole arranged to be aligned with the first through hole, and the fixing member is connected to the first through hole and the second through hole to fix the first barrier portion and / or the second barrier portion to the connecting member.

[0014] In one embodiment, the battery pack frame further includes a receiving member, and the first barrier portion, the second barrier portion, and the third barrier portion are fixedly connected to the first connecting frame and the second connecting frame via the receiving member.

[0015] In one embodiment, a cross section of the receiving member in a height direction of the rear frame is U-shaped, and an opening of the receiving member is arranged toward the top of the first connecting frame.

[0016] In one embodiment, the battery pack frame further includes a buffer, and the first barrier portion, the second barrier portion, the third barrier portion and the receiving member are all provided with a buffer, and the buffer is used to fill the gap between the first barrier portion, the second barrier portion, the third barrier portion and the receiving member.

[0017] In one embodiment, the material of the separator includes aluminum, and the material of the battery pack frame includes 780DP steel.

[0018] In a second aspect, an embodiment of the present invention provides a battery pack, which further includes: the above-mentioned battery pack frame; a bottom plate connected to the bottoms of the front frame, the first connecting frame, the rear frame, and the second connecting frame of the battery pack frame, and the bottom plate and the battery pack frame cooperate with each other to form a receiving cavity; a battery module disposed in the receiving cavity.

[0019] Applying the technical solution of the present invention, the front frame and the rear frame are set as an integrally stamped structure, and the first connecting frame and the second connecting frame are set as an integrally roll-formed structure. Since the structure after stamping has the advantages of light weight and low processing cost, it can reduce the overall weight of the battery pack frame to a certain extent and reduce the production cost, thus facilitating the transportation of the battery pack frame. Since the structure after roll-forming has the advantage of high strength, and since the first connecting frame and the second connecting frame need to be fixedly connected to external components, it can ensure the stability after the battery pack frame is connected to the external components, thereby reducing the risk of detachment between the battery pack frame and the external components to a certain extent and ensuring the safety during the use of the battery pack frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 is a three-dimensional schematic diagram of the battery pack frame provided by the embodiment of the present invention;

[0022] Figure 2 is a structural schematic diagram of the first connecting frame and the second connecting frame provided by the embodiment of the present invention;

[0023] Figure 3 is a cross-sectional schematic diagram of the first connecting frame and the second connecting frame provided by the embodiment of the present invention;

[0024] Figure 4 is a three-dimensional schematic diagram of the partition provided by the embodiment of the present invention;

[0025] Figure 5 is Figure 4 an enlarged schematic diagram of part A in

[0026] Figure 6 is Figure 4 an enlarged schematic diagram of part B in

[0027] Figure 7 is an assembly schematic diagram of the battery pack frame provided by the embodiment of the present invention;

[0028] Figure 8 is Figure 7 An enlarged schematic view of location C in the [object].

[0029] Among them, the above-mentioned drawings include the following reference numerals:

[0030] 11, front frame; 12, first connecting frame; 13, rear frame; 14, second connecting frame;

[0031] 21, top wall; 22, bottom wall; 23, inner wall; 24, outer wall; 25, reinforcing part;

[0032] 30, separator; 31, connecting piece; 32, first partition part; 33, second partition part; 34, third partition part;

[0033] 40, fixing piece; 41, first through hole; 42, second through hole;

[0034] 50, receiving piece; 60, buffer piece; 70, mounting beam. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present utility model.

[0036] As Figure 1 shown, an embodiment of the present utility model provides a battery pack frame. The battery pack frame includes a front frame 11, a first connecting frame 12, a rear frame 13, and a second connecting frame 14 that are sequentially connected end to end. The first connecting frame 12 and the second connecting frame 14 are used for fixedly connecting with external components; among them, both the front frame 11 and the rear frame 13 are integrally stamped and formed structures, and both the first connecting frame 12 and the second connecting frame 14 are integrally roll-formed structures.

[0037] Applying the technical solution of the present utility model, the front frame 11 and the rear frame 13 are set as an integrally stamped structure, and the first connecting frame 12 and the second connecting frame 14 are set as an integrally roll-formed structure. Since the structure after stamping has the advantages of light weight and low processing cost, it can reduce the overall weight of the battery pack frame to a certain extent and reduce the production cost, thus facilitating the transportation of the battery pack frame. Since the structure after roll-forming has the advantage of high strength, and the first connecting frame 12 and the second connecting frame 14 need to be fixedly connected to external components, it can ensure the stability after the connection between the battery pack frame and the external components, thereby reducing the risk of detachment between the battery pack frame and the external components to a certain extent and ensuring the safety during the use of the battery pack frame.

[0038] Among them, stamping is a forming processing method that uses a press and a die to apply external force to plates, strips, tubes, profiles, etc., so that they undergo plastic deformation or separation to obtain the required shape and size. Stamped parts usually have the characteristics of thin, uniform, light, and strong. The roll-forming process is a process that relies on the plastic movement of materials to roll and process into various shapes. The roll-forming deformation is a line contact and is carried out continuously step by step, requiring less deformation force. The roll-formed parts have high strength and stable quality.

[0039] As Figure 2 and Figure 3 shown, in this application, the first connecting frame 12 and the second connecting frame 14 have the same shape. Of course, in other embodiments of this application, the structures of the first connecting frame 12 and the second connecting frame 14 can also be set to different shapes, and the specific setting should be selected according to the use environment of the device, so as to improve the applicability and application range of the device.

[0040] At the same time, the front frame 11, the first connecting frame 12, the rear frame 13, and the second connecting frame 14 in this application are subjected to surface treatment by electrophoresis technology, and after electrophoresis treatment, they are connected to the partition member 30 in this application to form a box body. Electrophoresis is a phenomenon that uses the different moving speeds of charged particles in an electric field. Through this technology, charged particles can be separated. During electrophoresis, charged particles move towards the electrode with the opposite electric charge under the action of the electric field. In industrial production, electrophoresis technology is mainly used for painting. Electrophoretic coating is a common painting process, which is a method of depositing charged particles on the surface of a conductive material through the action of an electric field. This painting method has the advantages of uniform coating thickness, strong adhesion, and good painting quality, and is especially suitable for painting workpieces with complex shapes, which can avoid the corrosion of the steel frame, not only ensure the appearance integrity of the frame, but also extend the service life of the frame.

[0041] Specifically, the frame in the present application is made of high-strength steel, such as 780DP and higher-strength steel grades, thus ensuring the structural strength of the frame as much as possible. At the same time, the front frame 11, the first connecting frame 12, the rear frame 13 and the second connecting frame 14 are connected by resistance spot welding, laser welding or sealant.

[0042] Further, both the first connecting frame 12 and the second connecting frame 14 include a top wall 21, an outer side wall 24, a bottom wall 22 and an inner side wall 23 that are sequentially formed by rolling and connected to each other. The top wall 21, the bottom wall 22, the inner side wall 23 and the outer side wall 24 cooperate together to form a cavity. Since the structure of the cavity is relatively simple, has high strength and good rigidity, and is not easily deformed, it can improve the structural strength of the first connecting frame 12 and the second connecting frame 14, and ensure the structural stability of the first connecting frame 12 and the second connecting frame 14.

[0043] Further, a part of the outer side wall 24 close to the bottom wall 22 protrudes towards the side away from the inner side wall 23 to form a boss structure.

[0044] Specifically, the thickness of the top wall 21, the bottom wall 22, the inner side wall 23 and the outer side wall 24 is H, and 1mm ≤ H ≤ 2mm. When H < 1mm, the thickness of the top wall 21, the bottom wall 22, the inner side wall 23 and the outer side wall 24 is too thin, so that the structural strength of the component is relatively low and cannot meet the use requirements of the device. When H > 2mm, the thickness of the top wall 21, the bottom wall 22, the inner side wall 23 and the outer side wall 24 is too thick, which not only increases the materials required during production, resulting in an increase in production costs, but also increases the overall weight of the component, which is not conducive to assembly and transportation. Therefore, setting 1mm ≤ H ≤ 2mm can not only ensure the structural strength of the component to meet the use requirements of users, but also avoid disadvantages such as too high production costs and too heavy overall weight.

[0045] In the present application, H can be set to other values such as 1mm, 1.5mm or 2mm, as long as it can meet the use requirements of the device.

[0046] Further, there is a reinforcing part 25 between the inner side wall 23 and the outer side wall 24. Both ends of the reinforcing part 25 are respectively connected to the side of the inner side wall 23 close to the outer side wall 24 and the side of the outer side wall 24 close to the inner side wall 23. The extending direction of the reinforcing part 25 is the same as the extending direction of the top wall 21. Such a setting not only reasonably utilizes the space between the inner side wall 23 and the outer side wall 24, but also can support the inner side wall 23 and the outer side wall 24 by using the reinforcing rib during the use of the device, and can also improve the structural strength between the inner side wall 23 and the outer side wall 24 to ensure the stability during the use of the device.

[0047] In the present application, the width of the reinforcing portion 25 is the same as the width of the top wall 21. Of course, in other embodiments of the present application, the reinforcing portion 25 can also be adjusted according to the strength requirements. At the same time, the cross-sectional shapes of the first connecting frame 12 and the second connecting frame 14 are L-shaped. Optionally, the cross-sectional shapes of the first connecting frame 12 and the second connecting frame 14 can also be set to other shapes such as a Chinese character "ri" shape, a Chinese character "mu" shape or a T shape, as long as the usage requirements of the device can be met.

[0048] As Figures 4 to 6 shown, further, the battery pack frame further includes a partition member 30. The front frame 11, the first connecting frame 12, the rear frame 13 and the second connecting frame 14 together enclose a receiving portion. The partition member 30 is disposed in the receiving portion and divides the receiving portion into a plurality of receiving sub-portions for receiving battery modules. With such a setting, it is possible to prevent the battery modules in the plurality of receiving sub-portions from interfering with other battery modules when expanding, and thus the stability of the device during operation can be ensured.

[0049] Among them, the material of the partition member 30 includes aluminum.

[0050] Further, the partition member 30 includes a connecting member 31 extending along the length direction of the first connecting frame 12; a first blocking portion 32 disposed at one end of the connecting member 31, and the first blocking portion 32 extends along the length direction of the rear frame 13; a second blocking portion 33 disposed at the other end of the connecting member 31, and the second blocking portion 33 extends along the length direction of the rear frame 13; a third blocking portion 34 disposed in the middle of the connecting member 31, and the third blocking portion 34 extends along the length direction of the rear frame 13. Among them, both ends of the first blocking portion 32, the second blocking portion 33 and the third blocking portion 34 are fixedly connected to the first connecting frame 12 and the second connecting frame 14 respectively.

[0051] In the present application, the partition member 30 has a structure of a Chinese character "wang", and the third blocking portion 34 is a split structure and is symmetrically disposed on both sides of the connecting member 31 along the length direction of the rear frame 13. This not only facilitates the disassembly and assembly of the components, but also can meet the installation requirements of the battery modules. Of course, in other embodiments, the partition member 30 can also be set to other shapes, such as a Chinese character "tian" shape, as long as the usage requirements of the device can be met.

[0052] Further, the partition member 30 further includes a fixing member 40. The first blocking portion 32 and the connecting member 31 and the second blocking portion 33 and the connecting member 31 are fixedly connected by the fixing member 40. In the application, the fixing member 40 is a T-shaped wall-piercing joint. After the first blocking portion 32 and the connecting member 31 and the second blocking portion 33 and the connecting member 31 are fixed, the T-shaped head will overlap on the side walls of the first blocking portion 32 and the second blocking portion 33. Therefore, the contact area between the two can be increased, and the connection strength after fixing can be improved.

[0053] Of course, in other embodiments of the present application, the fixing member 40 may also be configured as a fastening bolt, etc., as long as the fixing requirements of the device can be met.

[0054] Furthermore, the first blocking portion 32 and / or the second blocking portion 33 has a first through hole 41 on one side facing the front frame 11, and the first through hole 41 extends along the length direction of the first connecting frame 12. The connecting member 31 has a second through hole 42 arranged to be aligned with the first through hole 41. The fixing member 40 is connected to the first through hole 41 and the second through hole 42 to fix the first blocking portion 32 and / or the second blocking portion 33 to the connecting member 31.

[0055] like Figure 7 and Figure 8 As shown, further, the battery pack frame further includes a receiving member 50, and the first barrier portion 32, the second barrier portion 33 and the third barrier portion 34 are fixedly connected to the first connection frame 12 and the second connection frame 14 through the receiving member 50. This arrangement can ensure the stability of the first barrier portion 32, the second barrier portion 33 and the third barrier portion 34 when connected to the first connection frame 12 and the second connection frame 14, thereby improving the connection strength between the components as much as possible.

[0056] In the present application, the cross-section of the receiving member 50 in the height direction of the rear frame 13 is U-shaped, and the opening of the receiving member 50 is arranged toward the top of the first connecting frame 12. The receiving member 50 has a mounting hole, and the first blocking portion 32, the second blocking portion 33 and the third blocking portion 34 are provided with through holes at the positions of the mounting holes of the receiving member 50 corresponding to each other, so that it is convenient for the external fixing member 40 to fix the two together. In the present application, the external fixing member 40 is a bolt. The above structure is simple and easy to process, which can not only reduce the production cost of the device, but also facilitate disassembly and assembly, thereby improving the disassembly and assembly efficiency of the device.

[0057] Furthermore, the battery pack frame also includes a buffer 60, and the first barrier portion 32, the second barrier portion 33, the third barrier portion 34 and the receiving member 50 are all provided with a buffer 60, and the buffer 60 is used to fill the gap between the first barrier portion 32, the second barrier portion 33, the third barrier portion 34 and the receiving member 50.

[0058] In the present application, the buffer 60 is specifically a structural adhesive, which has very high strength and good peeling resistance and impact resistance. Its compression strength can reach 65MPa, the steel-steel positive tensile bonding strength is 30MPa, and the shear strength is 18MPa. The above properties enable the structural adhesive to withstand large loads and maintain stable performance within the expected service life.

[0059] Meanwhile, the structural adhesive has good fatigue resistance and corrosion resistance, so it can be used as an isolation layer to reduce or even eliminate the electrochemical corrosion problem between different metals. Moreover, the construction process of the structural adhesive is simple, which can improve the installation efficiency of the components.

[0060] In a second aspect, an embodiment of the present invention provides a battery pack, which further includes: the above-mentioned battery pack frame; a bottom plate connected to the bottoms of the front frame, the first connection frame, the rear frame, and the second connection frame of the battery pack frame, and the bottom plate and the battery pack frame cooperate together to form a receiving cavity; a battery module disposed in the receiving cavity.

[0061] Applying the technical solution of the present invention, the front frame 11 and the rear frame 13 are set as an integrally stamped structure, and the first connection frame 12 and the second connection frame 14 are set as an integrally roll-formed structure. Since the structure after stamping has the advantages of light weight and low processing cost, it can reduce the overall weight of the battery pack frame to a certain extent and reduce the production cost, thus facilitating the transportation of the battery pack frame. Since the structure after roll-forming has the advantage of high strength, and since the first connection frame 12 and the second connection frame 14 need to be fixedly connected to external components, it can ensure the stability after the battery pack frame is connected to the external components, thereby reducing the risk of detachment between the battery pack frame and the external components to a certain extent and ensuring the safety of the battery pack frame during use.

[0062] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0063] Unless otherwise specifically stated, the relative arrangements of the components and steps set forth in these embodiments, numerical expressions, and values do not limit the scope of the present invention. At the same time, it should be understood that for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0064] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present utility model; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0065] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper...", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation other than the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0066] In addition, it should be noted that using words such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without additional declaration, the above words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present utility model.

[0067] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A battery pack frame, characterized in that: The battery pack frame includes a front frame, a first connection frame, a rear frame and a second connection frame connected in sequence from beginning to end, wherein the first connection frame and the second connection frame are used to be fixedly connected to an external component; The front frame and the rear frame are both integrally stamped and formed structures, and the first connecting frame and the second connecting frame are both integrally roll-formed structures.

2. The battery pack frame according to claim 1, characterized in that: The first connecting frame and / or the second connecting frame include a top wall, a bottom wall, an inner side wall and an outer side wall connected to each other, the outer side wall is connected to the external component, and the top wall, the bottom wall, the inner side wall and the outer side wall cooperate to form a cavity.

3. The battery pack frame according to claim 2, characterized in that: The portion of the outer side wall close to the bottom wall is protruded toward a side away from the inner side wall to form a boss structure.

4. The battery pack frame according to claim 2, characterized in that: The thickness of the top wall, the bottom wall, the inner wall and the outer wall is H, 1mm≤H≤2mm.

5. The battery pack frame according to claim 2, characterized in that: A reinforcement portion is provided between the inner wall and the outer wall, one end of the reinforcement portion is connected to a side of the inner wall close to the outer wall, the other end of the reinforcement portion is connected to a side of the outer wall close to the inner wall, and an extension direction of the reinforcement portion is the same as an extension direction of the top wall.

6. The battery pack frame according to any one of claims 1 to 5, characterized in that: The battery pack frame also includes a partition. The front frame, the first connecting frame, the rear frame and the second connecting frame together form a receiving portion. The partition is arranged in the receiving portion and divides the receiving portion into a plurality of receiving sub-portions, and the receiving sub-portions are used to receive battery modules.

7. The battery pack frame according to claim 6, characterized in that: The separator comprises: A connecting member extending along the length direction of the first connecting frame; A first blocking portion, disposed at one end of the connecting member close to the front frame, the first blocking portion extending along the length direction of the rear frame; A second barrier portion, disposed at one end of the connecting member close to the rear frame, the second barrier portion extending along the length direction of the rear frame; A third barrier portion, arranged in the middle of the connecting member, and extending along the length direction of the rear frame; Wherein, two ends of the first barrier portion, the second barrier portion and the third barrier portion are fixedly connected to the first connection frame and the second connection frame respectively.

8. The battery pack frame according to claim 7, characterized in that: The partition also includes a fixing member, and the first blocking portion and the connecting member and / or the second blocking portion and the connecting member are fixedly connected via the fixing member.

9. The battery pack frame according to claim 7, characterized in that: The third blocking portion is a split structure and is symmetrically arranged on both sides of the connecting member along the length direction of the rear frame.

10. The battery pack frame according to claim 8, characterized in that: The first blocking portion and / or the second blocking portion has a first through hole on a side facing the front frame, the first through hole extends along the length direction of the first connecting frame, the connecting member has a second through hole arranged in alignment with the first through hole, and the fixing member is connected to the first through hole and the second through hole to fix the first blocking portion and / or the second blocking portion to the connecting member.

11. The battery pack frame according to claim 7, characterized in that: The battery pack frame further includes a receiving member, and the first barrier portion, the second barrier portion, and the third barrier portion are fixedly connected to the first connecting frame and the second connecting frame through the receiving member.

12. The battery pack frame according to claim 11, characterized in that: The cross section of the receiving member in the height direction of the rear frame is U-shaped, and the opening of the receiving member is arranged toward the top of the first connecting frame.

13. The battery pack frame according to claim 11, characterized in that: The battery pack frame also includes a buffer member, and the first barrier portion, the second barrier portion, the third barrier portion and the receiving member are all provided with the buffer member, and the buffer member is used to fill the gap between the first barrier portion, the second barrier portion, the third barrier portion and the receiving member.

14. The battery pack frame according to claim 6, characterized in that: The material of the separator includes aluminum, and the material of the battery pack frame includes 780DP steel.

15. A battery pack, characterized in that: The battery pack further comprises: The battery pack frame according to any one of claims 1 to 14; A bottom plate connected to the front frame, the first connection frame, the rear frame and the bottom of the second connection frame of the battery pack frame, wherein the bottom plate cooperates with the battery pack frame to form a receiving cavity; The battery module is arranged in the accommodating cavity.

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