Battery module and its frame structure

Abstract

The present invention discloses a battery module frame structure, including a frame, a lower jacket and an upper jacket; the frame includes two oppositely arranged side frames and connecting plates respectively arranged at both ends of the side frames and used to connect the two side frames; the side frame includes a frame plate, a frame edge extending from the edge of the frame plate to the same side, and a riveting stud arranged on the frame edge; the connecting plate includes a plate body, a plate edge extending from two opposite sides of the plate body to the same side, and a first through hole arranged on the plate body and corresponding to the riveting stud; the lower jacket is arranged at the bottom of the frame and supported by the frame edge at the lower part of the side frame, the lower jacket is used to support and fix the battery cell, the lower jacket is fixedly arranged at the bottom of the upper frame, and the top of the upper jacket is also provided with a protrusion abutting against the frame edge at the upper part of the side frame. The present invention solves the problem that the battery module is easy to shake due to poor fixing method.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a battery module and a frame structure thereof. Background Art

[0002] Faced with increasingly stringent exhaust emission standards in China and around the world today and the future energy crisis, major automobile manufacturers are developing low-emission new energy technologies to adapt to this development trend. Among them, pure electric vehicles are one of the areas that major automobile companies are currently vigorously developing.

[0003] Different types of electric vehicles have different internal spaces for placing batteries. In order to make full use of the internal space of electric vehicles, battery boxes are also developing towards modularization. At present, the battery modules in the battery box are fixed to each other by ordinary screws. When the electric vehicle is running at a high speed, the battery modules are easy to shake, which poses a great safety hazard. Summary of the invention

[0004] Based on this, it is necessary to provide a battery module frame structure to address the problem that the existing battery module fixing method is poor and easy to shake.

[0005] The present invention provides a battery module frame structure, which includes a frame, a lower sheath, and an upper sheath:

[0006] The frame includes two side frames arranged opposite to each other and connecting plates respectively arranged at two ends of the side frames and used to connect the two side frames;

[0007] The side frame includes a frame plate, a frame edge extending from the edge of the frame plate to the same side, and a riveting stud arranged on the frame edge;

[0008] The connecting plate includes a plate body, plate edges extending from two opposite sides of the plate body to the same side, and a first through hole provided on the plate body and corresponding to the rivet stud;

[0009] The lower sheath is arranged at the bottom of the frame and received by the frame edge at the lower part of the side frame, the lower sheath is used to receive and fix the battery core, the lower sheath comprises a box body, a first groove arranged at one side of the box body, and a first protrusion arranged at another opposite side of the box body, the first groove is adapted to the first protrusion, and is used to connect multiple box bodies side by side;

[0010] The upper protective cover includes a cover body which is covered on the battery cell and corresponds to the lower protective cover, a second groove which is arranged on one side of the cover body, and a second protrusion which is arranged on the other opposite side of the cover body, wherein the second groove is adapted to the second protrusion and is used to connect multiple cover bodies side by side, and the top of the cover body is also provided with an electrode through hole for exposing the electrode of the battery cell, and the top of the cover body is also provided with a limiting protrusion which abuts against the frame edge of the upper part of the side frame.

[0011] Preferably, the first groove and the second groove are dovetail grooves.

[0012] Preferably, the connecting plate further comprises a fixed edge extending outward from a side edge of the plate body adjacent to the plate edge and a second through hole arranged on the fixed edge, and an extending direction of the fixed edge is opposite to an extending direction of the plate edge.

[0013] Preferably, the frame plate is also provided with heat dissipation holes.

[0014] Preferably, the battery module frame structure further comprises a vortex fan arranged on a side of the side frame facing away from the battery core, and an air inlet side hole of the vortex fan corresponds to the heat dissipation hole.

[0015] The present invention further provides a battery module, comprising the above-mentioned battery module frame structure and a battery cell arranged in the battery module frame structure.

[0016] Preferably, the battery module further comprises a metal strip and screws for fixing the metal strip, the metal strip is provided with connection holes corresponding to the like-polarity electrodes of the battery cell, and the screws pass through the connection holes and are adapted to the screw holes on the like-polarity electrodes.

[0017] The present invention provides a battery module frame structure including a frame, a lower cover and an upper cover, wherein the frame includes two oppositely arranged side frames and connecting plates respectively arranged at two ends of the side frames and used to connect the two side frames; the upper cover and the lower cover are respectively arranged in the frame, and the upper and lower ends of the battery cell are respectively wrapped and fixed by the upper and lower cover, the upper cover is supported by the lower frame edge of the side frame, and its side edges are covered and fixed by the two side plates of the frame and the frame edges at both ends, and similarly, the side edges of the upper cover are covered and fixed by the two side plates of the frame and the frame edges at both ends, and the top of the upper cover abuts against the upper frame edge of the side frame, thereby realizing all-round fixation of the battery cell, and at the same time, by arranging rivet studs on the frame edges at both ends of the side frame, it is also convenient to connect the side frame and the connecting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the battery module frame structure of the present invention;

[0020] Figure 2 for Figure 1 A schematic structural diagram of a battery module frame structure in an embodiment;

[0021] Figure 3 for Figure 1 A schematic diagram of the structure of the framework in the embodiment;

[0022] Figure 4 for Figure 1 A schematic structural diagram of the upper sheath in the embodiment;

[0023] Figure 5 for Figure 1 A schematic structural diagram of the lower sheath in the embodiment;

[0024] Figure 6 for Figure 1 A schematic structural diagram of a side frame in an embodiment.

[0025] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] The present invention proposes a battery module frame structure, referring to Figures 1 to 6 The battery module frame structure includes a frame 10, a lower jacket 22, and an upper jacket 25. The frame 10 includes two oppositely arranged side frames 11 and a connecting plate 12 respectively arranged at both ends of the side frame 11 and used to connect the two side frames 11; the side frame 11 includes a frame plate 11a, a frame edge extending from the edge of the frame plate 11a to the same side, and a pressure riveting stud 13 arranged on the frame edge; the connecting plate 12 includes a plate body 12a, a plate edge 12b extending from two opposite side edges of the plate body 12a to the same side, and a first through hole 12d arranged on the plate body 12a and corresponding to the pressure riveting stud 13; the lower jacket 22 is arranged at the bottom of the frame 10 and is received by the frame edge at the lower part of the side frame 11. The lower jacket 22 is used to receive and fix the battery cell 24. The lower jacket 22 includes a box body 22a, a setting A first groove 22c is provided on one side of the box body 22a and a first protrusion 22b is provided on the other opposite side of the box body 22a, the first groove 22c is adapted to the first protrusion 22b and is used to connect multiple box bodies 22a side by side; the upper cover 25 includes a cover body 25a which is covered on the battery cell 24 and corresponds to the lower cover 22, a second groove 25b is provided on one side of the cover body 25a and a second protrusion 25e is provided on the other opposite side of the cover body 25a, the second groove 25b is adapted to the second protrusion 25e and is used to connect multiple cover bodies 25a side by side, the top of the cover body 25a is also provided with an electrode through hole 25c for exposing the electrode of the battery cell 24, and the top of the cover body 25a is also provided with a limiting protrusion 25d which abuts against the frame edge of the upper part of the side frame 11.

[0030] In this embodiment, the outside of the battery cell 24 is covered by a protective film sleeve 23, and the upper end of the protective film sleeve 23 is opened to expose the electrodes of the battery cell 24, wherein the protective film sleeve 23 plays an insulating role to prevent foreign matter from entering between the battery cells and affecting the power supply of the battery cell 24. The frame edge includes a long side 11b and a short side 11c, wherein the long side 11b is located at the upper and lower ends of the side frame 11, and the short side 11c is located at the left and right ends of the side frame 11. The battery cell assembly composed of the upper sheath 25, the battery cell 24 and the lower sheath 22 is clamped between the upper and lower long sides 11b to limit its displacement in the Z-axis direction. The battery cell assembly is clamped between the short sides 11c at the left and right ends to limit its displacement in the Y-axis direction, and the battery cell assembly is clamped between two opposite frame plates 11a to limit its displacement in the X-axis direction. A mounting hole 11d is also provided on the short side 11c, and a self-riveting stud 13 is provided in the mounting hole 11d, wherein the stud is arranged outward, and the self-riveting stud 13 passes through the first through hole 12d and fixes the connecting plate 12 to the two side frames 11 through nuts, thereby achieving a fixed connection of the side frames 11.

[0031] Reference Figure 4 The lower jacket 22 is arranged at the bottom of the frame 10 and is completely constrained by the frame 10. The box bodies 22a are connected to each other through the first groove 22c and the first protrusion 22b. The upper jacket 25 is arranged above the lower jacket 22, wherein the cover 25a corresponds to the box body 22a below it one by one, the length and width of the inner part of the cover 25a are adapted to the length and width of the outer periphery of the top of the battery cell 24, the cover 25a is connected to each other through the second groove 25b and the second protrusion 25e, and the electrode through hole 25c is located at the top of the cover 25a near the two end edges. This structure uses the wall thickness of the upper and lower jackets 22 to control the distance between the battery cells 24, that is, to reserve space for the battery cells 24 to expand when charging, which is conducive to ventilation and heat dissipation.

[0032] The present invention provides a battery module frame structure including a frame 10, a lower cover 22 and an upper cover 25, wherein the frame 10 includes two oppositely arranged side frames 11 and connecting plates 12 respectively arranged at both ends of the side frames 11 and used to connect the two side frames 11; the upper cover 25 and the lower cover 22 are respectively arranged in the frame 10, and the upper and lower ends of the battery cell 24 are respectively wrapped and fixed by the upper and lower cover 22, the upper cover 25 is supported by the lower frame edge of the side frame 11, and the side edges of the upper cover 25 are covered and fixed by the two side plates of the frame 10 and the frame edges at both ends. Similarly, the side edges of the upper cover 25 are covered and fixed by the two side plates of the frame 10 and the frame edges at both ends. The top of the upper cover 25 abuts against the upper frame edge of the side frame 11, thereby achieving all-round fixation of the battery cell 24. At the same time, by arranging the rivet studs 13 on the frame edges at both ends of the side frame 11, it is also convenient to connect the side frame 11 with the connecting plate 12. This fixing method mainly fixes the battery cell 24 by the size of the side, reduces the use of screws, and makes the connection structure of the battery module frame structure more stable.

[0033] Preferably, the first groove 22c and the second groove 25b are dovetail grooves. In the present embodiment, the first groove 22c and the second groove 25b are preferably dovetail grooves, and the first protrusion 22b and the second protrusion 25e are dovetail protrusions. The number of the first protrusion 22b is two and is arranged on a longer side plate of the box body 22a, and the first groove 22c is arranged on the other longer side plate, and the positions of the first protrusion 22b and the first groove 22c correspond to each other. The number of the second protrusion 25e is two and is arranged on a longer side plate of the cover body 25a, and the second groove 25b is arranged on the other longer side plate, and the positions of the second protrusion 25e and the second groove 25b correspond to each other. By providing a dovetail connection structure, the connection strength between the box bodies 22a and the connection strength between the cover bodies 25a are further improved.

[0034] Preferably, the connecting plate 12 further includes a fixed edge 12c extending outward from the side edge adjacent to the plate body 12a and the plate edge 12b, and a second through hole provided on the fixed edge 12c, and the extension direction of the fixed edge 12c is opposite to the extension direction of the plate edge 12b. In this embodiment, by providing the fixed edge 12c and the second through hole, the battery module frame structure can be installed in the battery compartment by screw connection or pin positioning, or a mounting plate can be provided and screw holes corresponding to the second through holes can be provided thereon to achieve installation and fixation of multiple battery modules.

[0035] Furthermore, the frame plate 11a is also provided with heat dissipation holes, which are two relatively large square holes arranged side by side on the frame plate 11a. Enlarging the area of ​​the square holes as much as possible can speed up the circulation of hot air between the battery cells 24 to speed up heat dissipation.

[0036] In this embodiment, the battery module frame structure further includes a vortex fan (not shown) disposed on the side of the side frame 11 facing away from the battery cell 24, and the air inlet side hole of the vortex fan corresponds to the heat dissipation hole. The air outlet of the vortex fan is arranged upward to make the hot air rise so that the cold air in the external environment can enter from a low position to accelerate the heat dissipation.

[0037] The present invention further provides a battery module, comprising the above-mentioned battery module frame structure and a battery cell 24 arranged in the battery module frame structure.

[0038] Furthermore, the battery module also includes a metal strip 21 and screws for fixing the metal strip 21. The metal strip 21 is provided with connection holes corresponding to the like electrodes of the battery cell 24. The screws pass through the connection holes and adapt to the screw holes on the like electrodes.

[0039] The present invention can be used to assemble and fix multiple battery cells 24 to form a battery module by providing a battery module installation structure for installing battery cells 24. To cope with battery accommodating cavities of different sizes, multiple battery modules can be assembled together. A battery pack of specific specifications and models is formed by connecting the battery cells 24 in parallel and then in series, so as to facilitate subsequent maintenance, interchange of battery modules and cascade utilization of batteries.

[0040] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The above embodiments only express several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, several variations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A battery module frame structure, characterized in that: It includes a frame, a lower sheath and an upper sheath; The frame includes two side frames arranged opposite to each other and connecting plates respectively arranged at two ends of the side frames and used to connect the two side frames; The side frame includes a frame plate, a frame edge extending from the edge of the frame plate to the same side, and a riveting stud arranged on the frame edge; The connecting plate includes a plate body, plate edges extending from two opposite sides of the plate body to the same side, and a first through hole provided on the plate body and corresponding to the rivet stud; The lower sheath is arranged at the bottom of the frame and received by the frame edge at the lower part of the side frame, the lower sheath is used to receive and fix the battery core, the lower sheath comprises a box body, a first groove arranged at one side of the box body, and a first protrusion arranged at another opposite side of the box body, the first groove is adapted to the first protrusion, and is used to connect multiple box bodies side by side; The upper cover comprises a cover body which is covered on the battery cell and corresponds to the lower cover body, a second groove which is arranged on one side of the cover body, and a second protrusion which is arranged on the other opposite side of the cover body, wherein the second groove is adapted to the second protrusion and is used to connect a plurality of cover bodies side by side, and the top of the cover body is also provided with an electrode through hole for exposing the electrode of the battery cell, and the top of the cover body is also provided with a limiting protrusion which abuts against the frame edge of the upper part of the side frame; The connecting plate further comprises a fixed edge extending outward from the side edge of the plate body adjacent to the plate edge and a second through hole arranged on the fixed edge, wherein the extending direction of the fixed edge is opposite to the extending direction of the plate edge; The frame plate is also provided with heat dissipation holes; The battery module frame structure also includes a vortex fan arranged on a side of the side frame facing away from the battery core, the air inlet side hole of the vortex fan corresponds to the heat dissipation hole, and the air outlet of the vortex fan is arranged upward.

2. The battery module frame structure according to claim 1, characterized in that: The first groove and the second groove are dovetail grooves.

3. A battery module, characterized in that: It comprises the battery module frame structure as described in claim 1 or 2 and a battery cell arranged in the battery module frame structure.

4. The battery module according to claim 3, characterized in that: The battery module also includes a metal strip and a screw for fixing the metal strip. The metal strip is provided with a connection hole corresponding to the like-polarity electrode of the battery cell. The screw passes through the connection hole and is adapted to the screw hole on the like-polarity electrode.

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