Battery frame structure and stacked battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery frame structure which comprises a first frame, a second frame and a third frame, the first frame comprises a first shell and two first end bottom supports, and the two first end bottom supports are fixedly arranged at the two opposite ends of the first shell respectively; the second frame comprises a second shell and two second end bottom supports, the two second end bottom supports are fixedly arranged at the two opposite ends of the second shell respectively, and first openings are formed in the sides, away from each other, of the two second end bottom supports; the first frame is stacked on the first shell, the second frame is stacked on the first frame, the first end bottom support and the second end bottom support on the same end side are clamped in a limiting manner, and when a first battery cell is arranged in the first shell and a second battery cell is arranged in the second shell, the first end bottom support is used for supporting a first tab of the first battery cell, and the second end bottom support is used for supporting a second tab of the second battery cell. And the second tab of the second battery cell is positioned in the first opening so as to be conveniently bent towards the first tab, so that the welding process of the tabs of different layers of the stacked battery pack is simplified, and the operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery frame structure and stacked group batteries. Background Art

[0002] At present, lithium-ion batteries are more and more widely used in the field of electric vehicles. Soft-pack batteries are favored by the industry due to their good safety, light weight, high energy density and other advantages. The stacking scheme of soft-pack batteries has become one of the mainstream grouping schemes because the thickness of the battery can be flexibly adjusted to match different models. Due to the structural characteristics of the soft-pack battery itself, it is necessary to design a corresponding frame structure to fix the soft-pack battery when it is connected in series and parallel in the battery pack. When the stacked batteries are arranged in the battery box for electrical connection, the batteries in the same layer can be directly connected in series and parallel by welding the pole ears. When the batteries between different layers are connected in series and parallel, it is necessary to pre-bend one of the battery cell pole ears before stacking, and then stack them, and use tooling or separate structural parts to support the bottom of the pole ears to be welded, so that the pole ears of the two layers of batteries can be pressed by the pole ear pressing tooling for welding. After welding, the supporting tooling or structural parts need to be removed and installed at the bottom of the pole ears of the next layer of stacking modules. Since the electrical connections of different layers of batteries are usually set at both ends of the battery stacking module, the layout is close to the inner wall of the battery box, which leads to small operating space and low efficiency.

[0003] Therefore, it is necessary to provide a new battery frame structure, which can guide the bending of the tabs through the frame structure and simplify the process before the tab welding. Utility Model Content

[0004] The utility model aims to provide a battery frame structure and a stacked battery group to solve the technical problem that the process before the tab welding is too complicated in the prior art.

[0005] The utility model adopts the following technical solutions:

[0006] A battery frame structure, comprising:

[0007] A first frame, the first frame comprising a first shell and two first end brackets, the two first end brackets being respectively fixedly disposed at two opposite ends of the first shell;

[0008] A second frame, the second frame comprising a second shell and two second end brackets, the two second end brackets are respectively fixedly arranged at two opposite ends of the second shell, and the two second end brackets are each provided with a first opening on one side away from each other;

[0009] The second frame is stacked on the first frame, wherein the first end base support and the second end base support on the same end side are limitedly engaged with each other, and when a first battery cell is arranged in the first shell and a second battery cell is arranged in the second shell, the first end base support is used to support a first pole ear of the first battery cell, and the second pole ear of the second battery cell is located in the first opening so as to be bent toward the first pole ear.

[0010] Further, it also includes two first end pressure plates and two second end pressure plates;

[0011] The first end pressure plates are respectively arranged between the first end base and the second end base and are clamped with the first end base and the second end base, and a second opening is arranged on one side of the two first end pressure plates which are away from each other;

[0012] The second end pressure plates are respectively arranged on a side of the second end base away from the first end pressure plate and are clamped with the second end base, and a third opening is arranged on a side of the two second end pressure plates away from each other;

[0013] The first opening, the second opening and the third opening together form a guide groove for avoiding bending of the first tab.

[0014] Furthermore, it also includes a plurality of middle pressure plates, the first frame includes a plurality of first middle bottom brackets, and the second frame includes a plurality of second middle bottom brackets;

[0015] The first middle base is disposed between the two first end bases and is fixedly connected to the first shell, and the middle pressure plate is disposed on one side of the first middle base facing the bottom surface of the second shell;

[0016] The second middle bottom bracket is fixedly connected to a side of the second shell away from the first middle bottom bracket and is arranged corresponding to the first middle bottom bracket, and the middle pressure plate is arranged on a side of the second middle bottom bracket away from the bottom surface of the first shell;

[0017] Among them, the cooperation between the first middle base and the middle pressure plate is used to press the first pole ears of the first battery cell on both sides of the middle pressure plate; the cooperation between the second middle base and the middle pressure plate is used to press the second pole ears of the second battery cell on both sides of the middle pressure plate.

[0018] Further, the middle pressure plate is provided with a first positioning hole, the first middle base is provided with a first positioning pin corresponding to the first positioning hole on the side facing the second shell, and the second middle base is provided with a second positioning pin corresponding to the first positioning hole on the side facing away from the second shell.

[0019] Furthermore, a third positioning pin is provided on the side of the first end base close to the first end pressure plate, a fourth positioning pin is provided on the side of the second end base close to the first end pressure plate, and the first end pressure plate is provided with a second positioning hole corresponding to the third positioning pin and a third positioning hole corresponding to the fourth positioning pin.

[0020] Furthermore, a fifth positioning pin is provided on a side of the second end base close to the second end pressure plate, and a fourth positioning hole corresponding to the fifth positioning pin is provided on the second end pressure plate.

[0021] Furthermore, a first avoidance groove is provided on a side of the first middle base toward the second shell, a second avoidance groove is provided on a side of the second middle base away from the second shell, and a third avoidance groove is provided on a side of the first end base in the same direction as the first end pressure plate, wherein the first avoidance groove, the second avoidance groove and the third avoidance groove are respectively used to avoid heat from welding the tabs between the battery cells from penetrating the first middle base, the second middle base and the first end base.

[0022] Furthermore, it also includes a plurality of foams, wherein the foams are arranged between the first shell and the first battery core, and the foams are arranged between the second shell and the second battery core.

[0023] Furthermore, the first end base support, the first end pressure plate, the second end base support, the second end pressure plate, the first middle base support, the second middle base support and the middle pressure plate are made of insulating materials.

[0024] A stacked battery group includes a plurality of battery cells, a plurality of fixing members and a plurality of battery frame structures as described above;

[0025] Several groups of the battery frames are stacked, and the fixing member fixedly connects the first frame and the second frame of different groups;

[0026] The battery cells are evenly arranged in the first frame and the second frame of the battery frame structure.

[0027] Beneficial effects:

[0028] The utility model provides a battery frame structure, which comprises a first frame and a second frame, wherein a battery cell is installed in a first shell of the first frame and a second shell of the second frame, and a guide groove is formed by a first opening, a second opening and a third opening, so that a second pole ear of the second battery cell in the second frame can be guided and bent to the first pole ear of the first battery cell in the first frame for connection and then welding, so that the welding process of the pole ears between different layers of stacked battery groups can be simplified and the operation efficiency can be improved; a first middle bottom bracket, a second middle bottom bracket and a first end bottom bracket are respectively supported by a first avoidance groove, a second avoidance groove and a third avoidance groove so that the welding between the pole ears can be supported without causing local damage to the bottom bracket, thereby improving the welding quality and the stability of the frame; at the same time, the first frame and the second frame can support the battery cell and limit the battery cell to be controlled within a constant height space, thereby avoiding uneven force on the battery cells of each layer in the stacked battery group due to gravity, thereby affecting the service life of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a battery frame structure of the utility model;

[0030] Figure 2 This is an enlarged schematic diagram of a battery frame structure cut along the frame positioning position of the present invention;

[0031] Figure 3 This is a schematic structural diagram of a first frame of a battery frame structure according to the present invention;

[0032] Figure 4 This is a schematic structural diagram of a second frame of a battery frame structure according to the present invention.

[0033] in:

[0034] 1. first frame; 11. first shell; 12. first end bracket; 121. third positioning pin; 122. third avoidance groove; 13. first middle bracket; 131. first positioning pin; 132. first avoidance groove;

[0035] 2. second frame; 21. second shell; 22. second end bracket; 220. first opening; 221. fourth positioning pin; 222. fifth positioning pin; 23. second middle bracket; 231. second positioning pin; 232. second avoidance groove;

[0036] 3. Guide groove; 4. Second pole ear; 5. First pole ear; 6. First end pressure plate; 60. Second opening; 61. Second positioning hole; 62. Third positioning hole; 7. Second end pressure plate; 70. Third opening; 71. Fourth positioning hole; 8. Middle pressure plate; 81. First positioning hole.

[0037] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0040] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] Reference Figures 1 to 4The utility model proposes a battery frame structure, comprising: a first frame 1, the first frame 1 comprising a first shell 11 and two first end bases 12, the two first end bases 12 are respectively fixedly arranged at two opposite ends of the first shell 11; a second frame 2, the second frame 2 comprising a second shell 21 and two second end bases 22, the two second end bases 22 are respectively fixedly arranged at two opposite ends of the second shell 21, and the two second end bases 22 are each provided with a first opening 220 on one side facing away from each other; the second frame 2 is stacked on the first frame 1, wherein the first end base 12 and the second end base 22 on the same end side are limitedly engaged, when a first battery cell is arranged in the first shell 11 and a second battery cell is arranged in the second shell 21, the first end base 12 is used to support a first pole ear 5 of the first battery cell, and a second pole ear 4 of the second battery cell is located in the first opening 220 so as to be bent toward the first pole ear 5.

[0043] In the above embodiment, the first shell 11 in the first frame 1 is composed of a long bottom surface and two corresponding long side surfaces, the upper surface and the left and right side small surfaces are open, and the whole is stretched in a U shape. It not only serves as a supporting shell, but also has the function of heat dissipation fins. The two first end base brackets 12 are arranged at opposite ends of the inner side surface of the bottom surface of the first shell 11 in the length direction, and are fixed to the first shell 11 by hot riveting to form a whole. The two first end base brackets 12 and the bottom surface and length side surfaces of the first shell 11 form a certain accommodating space, which can be used to install battery cells. The first pole ear 5 of the first battery cell extends from the first end base bracket 12 and is supported by the first end base bracket 12. The second shell 21 in the second frame 2 is stretched in the same U shape as the first shell 11, with openings on the upper surface and small surfaces on the left and right sides, which also have the functions of supporting the battery cells and dissipating heat. The two second end brackets 22 are respectively arranged at the opposite ends of the inner side surface of the bottom surface of the second shell 21 in the length direction, that is, corresponding to the side of the two first end brackets 12 away from the first shell 11, and are fixedly connected to the second shell 21. The two second end brackets 22 and the bottom surface and length side of the second shell 21 also form a certain accommodating space, which can also be used to install battery cells. The first opening 220 is provided on the side of the two second end brackets 22 facing away from each other, that is, the outer side of the frame structure. Therefore, the second end bracket 22 is U-shaped when viewed from a top view, and the first opening 220 corresponds to the first end bracket 12 having a guiding function The second frame 2 is stacked on the first frame 1. At the same end of the two frames, the first end bracket 12 and the second end bracket 22 can be limitedly connected by a limiter. The second pole ear 4 of the second battery cell installed in the second frame 2 extends from the second end bracket 22 and is supported by the second end bracket 22. The second pole ear 4 is bent from top to bottom along the first opening 220 by the tooling, and continues to extend outward for a proper distance after reaching the first end bracket 12, so that the second pole ear 4 contacts the first pole ear 5 within the range of the first end bracket 12, and then is welded and fixed, so that the pole ears between different layers of the stacked battery can be quickly connected in series and parallel without the tedious pre-bending of the pole ears, eliminating the busbar and other component structures, improving the battery grouping efficiency, and thus improving the battery energy density.

[0044] In one embodiment, reference Figure 3, also includes two first end pressure plates 6 and two second end pressure plates 7; the first end pressure plates 6 are respectively arranged between the first end base bracket 12 and the second end base bracket 22 and are clamped with the first end base bracket 12 and the second end base bracket 22, and the two first end pressure plates 6 are provided with a second opening 60 on the side away from each other; the second end pressure plates 7 are respectively arranged on the side of the second end base bracket 22 away from the first end pressure plate 6 and are clamped with the second end base bracket 22, and the two second end pressure plates 7 are provided with a third opening 70 on the side away from each other; the first opening 220, the second opening 60 and the third opening 70 together constitute a guide groove 3 for avoiding the bending of the first pole ear 5.

[0045] In the above embodiment, the first end base 12 supports the first pole ear 5, the first end pressure plate 6 covers the first pole ear 5 and is detachably connected to the first end base 12 in the form of a fixing member clamping. At the same time, the first end pressure plate 6 supports the second end base 22 and is detachably connected thereto. Similarly, the second end base 22 supports the second pole ear 4, the second end pressure plate 7 covers the second pole ear 4 and is detachably connected to the second end base 22 in the form of a fixing member clamping. The ends of the frame are, from top to bottom, the second end pressure plate 7, the second end base 22, the first end pressure plate 7, the Plate 6, first end base bracket 12, first end pressure plate 6 and second end pressure plate 7 are respectively provided with a second opening 60 and a third opening 70 on the outer side facing the frame structure, so the first end pressure plate 6 and the second end pressure plate 7 are also in the same U shape as the second end base bracket 22, the first opening 220, the second opening 60 and the third opening 70 together constitute the above-mentioned guide groove 3, the second pole ear 4 is squeezed by the tooling from the guide groove 3 for the first bending, and after reaching the first end base bracket 12, it is bent outward for the second time to overlap with the first pole ear 5, and then welded to each other.

[0046] In one embodiment, it also includes a plurality of middle pressure plates 8, the first frame 1 includes a plurality of first middle base supports 13, and the second frame 2 includes a plurality of second middle base supports 23; the first middle base support 13 is arranged between the two first end base supports 12 and is fixedly connected to the first shell 11, and the middle pressure plate 8 is arranged on the side of the first middle base support 13 facing the bottom surface of the second shell 21; the second middle base support 23 is fixedly connected to the side of the second shell 21 away from the first middle base support 13 and is arranged corresponding to the first middle base support 13, and the middle pressure plate 8 is arranged on the side of the second middle base support 23 away from the bottom surface of the first shell 11; wherein, the cooperation between the first middle base support 13 and the middle pressure plate 8 is used to press the first pole ears 5 of the first battery cell on both sides of the middle pressure plate 8; the cooperation between the second middle base support 23 and the middle pressure plate 8 is used to press the second pole ears 4 of the second battery cell on both sides of the middle pressure plate 8.

[0047] In the above embodiment, the first middle base 13 can be set to be several, and the specific number is determined according to the number of first battery cells in the first frame 1. A first middle base 13 is set between every two first battery cells. From the overall view of the frame, the first middle base 13 is evenly arranged between the two first end bases 12, and is fixed to the first shell 11 by hot riveting. The first middle base 13 is provided with a corresponding number of middle pressure plates 8 corresponding to the first middle base 13 on the side facing the bottom surface of the second shell 21, covering the first pole ears 5 of the first battery cells on both sides of the middle pressure plate 8 to connect them. The position and number of the second middle base 23 correspond to the first middle base 13, and are specifically arranged on the side of the second shell 21 away from the first middle base 13, and are fixed to the second shell 21 by hot riveting. The cooperation between the second middle base 23 and the middle pressure plate 8 covers the connection between the second pole ears 4 of the second battery cells on both sides of the middle pressure plate 8.

[0048] In one embodiment, the middle pressure plate 8 is provided with a first positioning hole 81, the first middle base support 13 is provided with a first positioning pin 131 corresponding to the first positioning hole 81 on the side facing the second shell 11, and the second middle base support 23 is provided with a second positioning pin 231 corresponding to the first positioning hole 81 on the side facing away from the second shell 21.

[0049] In the above embodiment, the first positioning pin 131 cooperates with the first positioning hole 81 so that the first central base 13 cooperates with the central pressure plate 8 to support and press the battery cell pole ear while maintaining their own limited fixation. Similar to the cooperation between the first positioning pin 131 and the first positioning hole 81, the second positioning pin 231 cooperates with the first positioning hole 81 so that the second central base 23 cooperates with the central pressure plate 8 to support and press the battery cell pole ear while maintaining their own limited fixation.

[0050] In one embodiment, the first end base bracket 12 is provided with a third positioning pin 121 on the side close to the first end pressure plate 6, the second end base bracket 22 is provided with a fourth positioning pin 221 on the side close to the first end pressure plate 6, and the first end pressure plate 6 is provided with a second positioning hole 61 corresponding to the third positioning pin 121 and a third positioning hole 62 corresponding to the fourth positioning pin 221. The second end base bracket 22 is provided with a fifth positioning pin 222 on the side close to the second end pressure plate 7, and the second end pressure plate 7 is provided with a fourth positioning hole 71 corresponding to the fifth positioning pin 222.

[0051] In this embodiment, the first end base bracket 12, the first end pressure plate 6, the second end base bracket 22 and the second end pressure plate 7 stacked in sequence at the same end have different connection structures on both sides, one of which is that the first end base bracket 12 and the first end pressure plate 6 are detachably connected on one side through the cooperation of the third positioning pin 121 and the second positioning hole 61, and are mutually limited and fixed in the first layer of the stacked battery group; on the same side as the cooperation of the third positioning pin 121 and the second positioning hole 61, the second end base bracket 22 and the second end pressure plate 7 are detachably connected and are mutually limited and fixed in the second layer of the stacked battery group through the cooperation of the fifth positioning pin 222 and the fourth positioning hole 71; on the other side opposite to the above, the first end pressure plate 6 and the second end base bracket 22 are mutually limited and fixed through the cooperation of the fourth positioning pin 221 and the third positioning hole 62, and at the same time, the first layer and the second layer of the stacked battery group are fixed, that is, the first frame 1 and the second frame 2 are mutually limited in the upper and lower layers. At the other end of the frame, the first end base 12, the first end pressure plate 6, the second end base 22, and the second end pressure plate 7 stacked in sequence are arranged to be horizontally rotated 180° relative to the above-mentioned one end, rather than being arranged in a mirror image. In another embodiment, at the same end of the frame, it can also be arranged that the cooperation of the third positioning pin 121 and the second positioning hole 61, the cooperation of the fifth positioning pin 222 and the fourth positioning hole 71, and the cooperation of the fourth positioning pin 221 and the third positioning hole 62 are all on the same side, and the opposite sides are arranged at the same time.

[0052] In one embodiment, a first avoidance groove 132 is provided on a side of the first middle base 13 facing the second shell 11, a second avoidance groove 232 is provided on a side of the second middle base 23 facing away from the second shell 21, and a third avoidance groove 122 is provided on a side of the first end base 12 in the same direction as the first end pressure plate 6, wherein the first avoidance groove 132, the second avoidance groove 232 and the third avoidance groove 122 are respectively used to avoid the heat from the welding of the tabs between the battery cells from penetrating the first middle base 13, the second middle base 23 and the first end base 12.

[0053] In this embodiment, the first avoidance groove 132 can be used to avoid the welding of the pole ears between the battery cells in the first shell 11, and prevent the heat during welding from damaging the first middle base 13. The second avoidance groove 232 can be used to avoid the welding of the pole ears between the battery cells in the second shell 21, and prevent the heat during welding from damaging the second middle base 23. The third avoidance groove 122 can be used to avoid the welding of the second pole ear 4 with the first pole ear 5 after bending, and prevent the heat during welding from damaging the first end base 12. The shapes of the first avoidance groove 132, the second avoidance groove 232 and the third avoidance groove 122 can be determined according to the shapes during welding. It is only necessary to ensure that the welding area is within the area of ​​each avoidance groove. The shapes of the various avoidance grooves shown in the accompanying drawings are one embodiment.

[0054] In one embodiment, a plurality of foams are further included. The foams are disposed between the first shell 11 and the first battery core, and the foams are disposed between the second shell 21 and the second battery core.

[0055] In this embodiment, when installing the battery cell in the first shell 11 and the second shell 21, a layer of foam can be installed between the shell and the battery cell. The first frame 1 and the second frame 2 can support the battery cell and foam therein, so that the initial force and initial deformation of the foam in each frame remain consistent, and the height space of the battery cell and foam is limited to a constant range, so as to avoid uneven force on the battery cells and foam in each layer due to gravity in the stacked battery group, thereby affecting the service life of the battery cell.

[0056] In one embodiment, the first end base support 12 , the first end pressure plate 6 , the second end base support 22 , the second end pressure plate 7 , the first middle base support 13 , the second middle base support 23 and the middle pressure plate 8 are made of insulating materials.

[0057] In this embodiment, the first end base support 12, the first end pressure plate 6, the second end base support 22, the second end pressure plate 7, the first middle base support 13, the second middle base support 23 and the middle pressure plate 8 are all made of insulating materials, so that when the pole ears are pressed or contacted, the current will not leak, thereby preventing the electrical equipment from malfunctioning and being dangerous due to current leakage, thereby improving the safety of the equipment. The insulating material used has the characteristics of high strength, heat resistance, corrosion resistance, etc., and is preferably plastic. At the same time, it can also reduce the overall weight of the battery frame structure to achieve lightweight.

[0058] An embodiment of the utility model also provides a stacked battery group, comprising a plurality of battery cells, a plurality of fixings and a plurality of battery frame structures as described above; a plurality of groups of the battery frames are stacked, and the fixings fix the first frames 1 and the second frames 2 of different groups; the battery cells are evenly arranged in the first frames 1 and the second frames 2 of the battery frame structures.

[0059] In this embodiment, a plurality of cells are respectively arranged in the first frame 1 and the second frame 2 of the battery frame structure. Specifically, the cells and the first middle bottom bracket 13 are placed evenly in sequence on the basis of the first end bottom bracket 12. At the same time, the first middle bottom bracket 13 and the middle pressure plate 8 press and hold the tabs of the cells. The tabs at the middle end of the second frame 2 are bent from top to bottom along the guide groove 3 by the tab bending tool, so that the tabs at the middle end of the second frame 2 are in contact with the tabs at the middle end of the first frame 1 in the range of the first end bottom bracket 12, and then welded and fixed, so that the tabs between different layers of a group of stacked batteries can be quickly connected in series and parallel without the need for tedious pre-bending of the tabs. The cell arrangement in the second frame 2 is similar to the first frame 1, and will not be repeated. After the first frame 1, the second frame 2 and the cells are assembled in one group, the next group is installed, specifically, a new group is stacked on the second frame 2, and the second frame 2 in the first group and the first frame 1 of the second group are clamped by the fixing member to fix the different groups, and then the above operation is continued when stacking is continued.

[0060] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A battery frame structure, characterized in that: include: A first frame, the first frame comprising a first shell and two first end brackets, the two first end brackets being respectively fixedly disposed at two opposite ends of the first shell; A second frame, the second frame comprising a second shell and two second end brackets, the two second end brackets are respectively fixedly arranged at two opposite ends of the second shell, and the two second end brackets are each provided with a first opening on one side away from each other; The second frame is stacked on the first frame, wherein the first end base support and the second end base support on the same end side are limitedly engaged with each other, and when a first battery cell is arranged in the first shell and a second battery cell is arranged in the second shell, the first end base support is used to support a first pole ear of the first battery cell, and the second pole ear of the second battery cell is located in the first opening so as to be bent toward the first pole ear.

2. The battery frame structure according to claim 1, characterized in that: Also included are two first end clamps and two second end clamps; The first end pressure plates are respectively arranged between the first end base and the second end base and are clamped with the first end base and the second end base, and a second opening is arranged on one side of the two first end pressure plates which are away from each other; The second end pressure plates are respectively arranged on a side of the second end base away from the first end pressure plate and are clamped with the second end base, and a third opening is arranged on a side of the two second end pressure plates away from each other; The first opening, the second opening and the third opening together form a guide groove for avoiding bending of the first tab.

3. The battery frame structure according to claim 2, characterized in that: It also includes a plurality of middle pressure plates, the first frame includes a plurality of first middle bottom brackets, and the second frame includes a plurality of second middle bottom brackets; The first middle base is disposed between the two first end bases and is fixedly connected to the first shell, and the middle pressure plate is disposed on one side of the first middle base facing the bottom surface of the second shell; The second middle bottom bracket is fixedly connected to a side of the second shell away from the first middle bottom bracket and is arranged corresponding to the first middle bottom bracket, and the middle pressure plate is arranged on a side of the second middle bottom bracket away from the bottom surface of the first shell; Among them, the cooperation between the first middle base and the middle pressure plate is used to press the first pole ears of the first battery cell on both sides of the middle pressure plate; the cooperation between the second middle base and the middle pressure plate is used to press the second pole ears of the second battery cell on both sides of the middle pressure plate.

4. The battery frame structure according to claim 3, characterized in that: The middle pressure plate is provided with a first positioning hole, the first middle base is provided with a first positioning pin corresponding to the first positioning hole on the side facing the second shell, and the second middle base is provided with a second positioning pin corresponding to the first positioning hole on the side facing away from the second shell.

5. The battery frame structure according to claim 2, characterized in that: A third positioning pin is provided on the side of the first end base close to the first end pressure plate, a fourth positioning pin is provided on the side of the second end base close to the first end pressure plate, and the first end pressure plate is provided with a second positioning hole corresponding to the third positioning pin and a third positioning hole corresponding to the fourth positioning pin.

6. The battery frame structure according to claim 2, characterized in that: A fifth positioning pin is disposed on one side of the second end base close to the second end pressure plate, and a fourth positioning hole corresponding to the fifth positioning pin is disposed on the second end pressure plate.

7. The battery frame structure according to claim 3, characterized in that: A first avoidance groove is provided on the side of the first middle base toward the second shell, a second avoidance groove is provided on the side of the second middle base away from the second shell, and a third avoidance groove is provided on the side of the first end base in the same direction as the first end pressure plate, wherein the first avoidance groove, the second avoidance groove and the third avoidance groove are respectively used to avoid the heat from the welding of the tabs between the battery cells from penetrating the first middle base, the second middle base and the first end base.

8. The battery frame structure according to claim 1, characterized in that: It also includes a plurality of foams, wherein the foams are arranged between the first shell and the first battery core, and the foams are arranged between the second shell and the second battery core.

9. The battery frame structure according to claim 3, characterized in that: The first end base support, the first end pressure plate, the second end base support, the second end pressure plate, the first middle base support, the second middle base support and the middle pressure plate are made of insulating materials.

10. A stacked battery group, characterized in that: Comprising a plurality of battery cells, a plurality of fixing members and a plurality of battery frame structures as described in any one of claims 1 to 9; Several groups of the battery frames are stacked, and the fixing member fixedly connects the first frame and the second frame of different groups; The battery cells are evenly arranged in the first frame and the second frame of the battery frame structure.

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