CN110335979A - Battery module and its frame structure - Google Patents

Abstract

The invention discloses a battery module frame structure, which includes a frame, a lower sheath and an upper sheath; 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 frame includes a frame plate, a frame edge extending from the edge of the frame plate to the same side, and a pressure riveting stud arranged on the frame edge; the connecting plate includes a plate body, and plate edges extending from two opposite sides of the plate body to the same side 1. The first through hole set on the plate body and corresponding to the pressure riveting stud; the lower sheath is arranged at the bottom of the frame and is accepted by the frame edge of the lower part of the side frame. The lower sheath is used to accept and fix the battery core, and the lower sheath The bottom of the upper frame is fixedly arranged, and the top of the upper sheath is also provided with a protrusion abutting against the frame edge of the upper part of the side frame. The invention solves the problem that the battery module is easily shaken due to poor fixing method.

Description

Battery module and its frame structure

technical field

The invention relates to the field of batteries, in particular to a battery module and its frame structure.

Background technique

Faced with the increasingly stringent exhaust emission standards in China and the world and the energy crisis in the future, major automakers are developing low-emission new energy technologies to adapt to this development trend, among which pure electric vehicles are currently the major automakers. one of the areas of research and development.

For different types of electric vehicles, the space for placing batteries inside them is different. In order to make full use of the internal space of electric vehicles, the battery box is also developing towards modularization. At present, the battery modules in the battery box are fixed to each other through ordinary screw connections. When the electric vehicle travels at a high speed, the battery modules are easy to shake, which poses a great safety hazard.

Contents of the invention

Based on this, it is necessary to provide a battery module frame structure for the problem that the existing battery module is not well fixed and easy to shake.

The present invention proposes a battery module frame structure, which includes a frame, a lower sheath, and an upper sheath:

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 pressure 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 pressure riveting stud;

The lower sheath is arranged at the bottom of the frame and is received by the frame edge of the lower part of the side frame. The lower sheath is used to receive and fix the electric core. The lower sheath includes a box body and is arranged on a box body The first groove on the side and the first protrusion provided on the other opposite side of the box, the first groove and the first protrusion are adapted to connect multiple boxes side by side ;

The upper sheath includes a cover covering the electric core and corresponding to the lower sheath, a second groove provided on one side of the cover, and a second groove provided on the other side of the cover. The second protrusion on the side, the second groove is adapted to the second protrusion, and is used to connect a plurality of covers side by side, and the top of the cover is also provided with electrodes for the electric core The exposed electrode through hole, the top of the cover is also provided with a limit protrusion abutting against the frame edge of the upper part of the side frame.

Preferably, the first groove and the second groove are dovetail grooves.

Preferably, the side frame further includes a fixed edge extending outward from the side adjacent to the plate body and the plate edge, and a second through hole provided on the fixed edge, and the extending direction of the fixed edge It is opposite to the extending direction of the edge of the plate.

Preferably, the frame plate is also provided with cooling holes.

Preferably, the frame structure of the battery module further includes a vortex fan arranged on the side of the side frame facing away from the battery core, and the air intake side hole of the vortex fan corresponds to the heat dissipation hole.

The present invention also proposes a battery module, including the above-mentioned battery module frame structure and batteries arranged in the battery module frame structure.

Preferably, the battery module further includes metal laths and screws for fixing the metal laths, the metal laths are provided with connection holes corresponding to the electrodes of the same sex of the batteries, and the screws pass through the metal laths. The connecting hole is adapted to the screw hole on the electrode of the same sex.

The present invention provides a battery module frame structure including a frame, a lower sheath and an upper sheath, wherein the frame includes two opposite side frames and connecting plates respectively arranged at both ends of the side frames and used to connect the two side frames ; The upper sheath and the lower sheath are respectively arranged in the frame, the upper and lower ends of the cell are respectively wrapped and fixed by the upper and lower sheaths, and the upper sheath is supported by the lower frame of the side frame, and its side is supported by the two sides of the frame. The side plates and the frame edges at both ends are covered and fixed. Similarly, the sides of the upper sheath are covered and fixed by the two side plates of the frame and the frame edges at both ends. The top of the upper sheath abuts against the upper frame of the side frame, thus The all-round fixing of the battery core is realized, and at the same time, the connection between the side frame and the connecting plate is facilitated by setting the riveting studs on the frame edges at both ends of the side frame.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative effort.

Fig. 1 is a structural schematic diagram of an embodiment of the frame structure of the battery module in the present invention;

Fig. 2 is a structural schematic diagram of the frame structure of the battery module in the embodiment of Fig. 1;

Fig. 3 is the structural representation of framework in Fig. 1 embodiment;

Fig. 4 is a schematic structural view of the upper sheath in the embodiment of Fig. 1;

Fig. 5 is a schematic structural view of the lower sheath in the embodiment of Fig. 1;

Fig. 6 is a schematic structural diagram of the side frame in the embodiment of Fig. 1 .

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back, top, bottom, etc.) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture ( As shown in the accompanying drawings), if the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not be interpreted as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

The present invention proposes a battery module frame structure. Referring to FIGS. 1 to 6, the battery module frame structure includes a frame 10, a lower sheath 22, and an upper sheath 25. The frame 10 includes two opposite side frames 11. And the connection plate 12 that is respectively arranged on the two ends of described side frame 11 and is used to connect two side frames 11; The pressure riveting studs 13 arranged on the edge of the frame; the connecting plate 12 includes a plate body 12a, a plate edge 12b extending from two opposite sides of the plate body 12a to the same side, and is arranged on the plate body 12a and corresponding to the first through hole 12d of the pressure riveting stud 13; the lower sheath 22 is arranged at the bottom of the frame 10 and is received by the frame edge of the lower part of the side frame 11, the lower sheath 22 is used to receive and fix the electric core 24. The lower sheath 22 includes a box body 22a, a first groove 22c arranged on one side of the box body 22a, and a first groove 22c arranged on the other opposite side of the box body 22a. A protrusion 22b, the first groove 22c is adapted to the first protrusion 22b, and is used to connect multiple boxes 22a side by side; the upper sheath 25 includes a cover set on the battery core 24 And the cover 25a corresponding to the lower sheath 22, the second groove 25b provided on one side of the cover 25a, and the second protrusion 25e provided on the opposite side of the cover 25a, The second groove 25b is adapted to the second protrusion 25e, and is used to connect a plurality of covers 25a side by side, and the top of the cover 25a is also provided with an electrode for exposing the electrode of the battery cell 24 Through hole 25c, the top of the cover 25a is also provided with a limiting protrusion 25d that abuts against the frame edge of the upper part of the side frame 11 .

In this embodiment, the exterior of the battery cell 24 is covered by a protective film cover 23, and the upper end of the protective film cover 23 exposes the electrodes of the battery cell 24, wherein the protective film cover 23 acts as an insulation to prevent foreign matter from entering between the battery cells. Affect the electric core 24 power supply. The frame side 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, consisting of an upper sheath 25, a battery cell 24 and a lower sheath 22 The cell assembly is clamped between the upper and lower long sides 11b to limit its displacement in the Z-axis direction. The cell assembly is clamped between the short sides 11c at the left and right ends to limit its displacement in the Y-axis direction. It is clamped between two opposite frame plates 11a to limit its displacement in the X-axis direction. An installation hole 11d is also provided on the short side 11c, and a pressure riveting stud 13 is arranged in the installation hole 11d, wherein the stud is arranged outwardly, and the pressure riveting stud 13 passes through the first through hole 12d and connects the connecting plate 12 through a nut. It is fixed on the two side frames 11 to realize the fixed connection to the side frames 11.

Referring to FIG. 4 , the lower sheath 22 is arranged on the bottom of the frame 10 and is completely constrained by the frame 10 , and the boxes 22 a are connected with each other through the first groove 22 c and the first protrusion 22 b. The upper sheath 25 is arranged above the lower sheath 22, wherein the cover body 25a corresponds to the box body 22a below it one by one. The body 25a and the cover 25a are connected together 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 edges of both ends. In this structure, the wall thickness of the upper and lower sheaths 22 is used to control the distance between the battery cells 24, that is, the space for expansion of the battery cells 24 during charging is reserved, which is beneficial to ventilation and heat dissipation.

The present invention provides a battery module frame structure including a frame 10, a lower sheath 22 and an upper sheath 25, wherein the frame 10 includes two oppositely arranged side frames 11 and are respectively arranged at both ends of the side frames 11 for connection The connecting plates 12 of the two side frames 11; the upper sheath 25 and the lower sheath 22 are respectively arranged in the frame 10; The lower frame of the side frame 11 is received, and the side of the upper sheath 25 is covered and fixed by the two side plates of the frame 10 and the frame edges at both ends. The frame edge is covered and fixed, and the top of the upper sheath 25 abuts against the upper frame edge of the side frame 11, thereby realizing the all-round fixation of the battery cell 24, and at the same time, by setting pressure on the frame edges at both ends of the side frame 11 The rivet stud 13 also facilitates the connection of the side frame 11 and the connecting plate 12 . This fixing method mainly fixes the battery cell 24 through the size of the side, which reduces the application of screws and makes the connection structure of the battery module frame structure more stable.

Preferably, the first groove 22c and the second groove 25b are dovetail grooves. In this 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-shaped protrusions. The quantity of the first protrusion 22b is two and is arranged on the longer side plate of the box body 22a, and the first groove 22c is then arranged on the other longer side plate, the first protrusion 22b and the first groove The positions of 22c correspond to each other. The quantity of the second protrusion 25e is two and is arranged on the longer side plate of the cover body 25a, and the second groove 25b is then arranged on the other longer side plate, and the second protrusion 25e and the second groove The positions of 25b correspond to each other. By providing a dovetail-shaped connection structure, the connection strength between the box bodies 22a and the connection strength between the cover bodies 25a are further improved.

Preferably, the side frame 11 further includes a fixed edge 12c extending outward from the side adjacent to the plate body 12a and the plate edge 12b and a second through hole provided on the fixed edge 12c, the The extending direction of the fixed edge 12c is opposite to the extending direction of the plate edge 12b. In this embodiment, by setting the fixed side 12c and the second through hole, the battery module frame structure can be installed in the battery compartment by means of screw connection or pin positioning, or a mounting plate can be set and mounted on it. Screw holes corresponding to the second through holes are provided to realize the installation and fixation of multiple battery modules.

Further, heat dissipation holes are also provided on the frame plate 11a. The cooling holes are two larger 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 cells 24 to speed up heat dissipation.

In this embodiment, the frame structure of the battery module further includes a vortex fan (not shown in the figure) arranged on the side of the side frame 11 facing away from the battery core 24, and the intake of the vortex fan is The gas side holes correspond to the heat dissipation holes. The air outlet of the vortex fan is set upward, so that the hot air rises, so that the cold air in the external environment enters from a low place to accelerate heat dissipation.

The present invention also proposes a battery module, including the battery module frame structure described above and the battery cells 24 arranged in the battery module frame structure.

Further, the battery module also includes metal laths 21 and screws for fixing the metal laths 21, the metal laths 21 are provided with connection holes corresponding to the electrodes of the same sex of the batteries 24, the A screw passes through the connection hole and is adapted to the screw hole on the electrode of the same sex.

The present invention can be used to assemble and fix a plurality of battery cells 24 to form a battery module by providing a battery module installation structure for installing the battery cells 24, and to deal with battery accommodation chambers of different sizes, a plurality of battery modules can be assembled together, through A battery pack of a specific specification is formed by connecting the cells 24 in parallel and then in series, so as to facilitate subsequent maintenance, interchangeable battery modules and cascade utilization of batteries.

The technical features of the above embodiments can be combined arbitrarily. 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 It is considered to be within the range described in this specification. The above examples only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (7)

1. a kind of battery modules frame structure, which is characterized in that including frame, lower jacket and upper jacket；

The frame includes two side frames being oppositely arranged and the both ends for being separately positioned on the side frame and is used to connect two side frames Connecting plate；

The side frame include deckle board, from the edge of the deckle board to the frame of ipsilateral extension while and while the frame is set on pressure Riveted screw pole；

The connecting plate include plate body, from the two opposite sides side of the plate body to the edges of boards of ipsilateral extension, be arranged in the plate body First through hole upper and corresponding with the self-clinching standoff；

The lower jacket is arranged in the base of frame and is accepted by the frame side of the side frame lower part, and the lower jacket is for accepting With fixed battery core, the lower jacket includes that box body, the first groove that box body a side is arranged in and setting are another in the box body First protrusion of one relative side, first groove are adapted to, with first protrusion for connecting multiple box bodys side by side；

The upper jacket is located in the battery core including lid and lid corresponding with the lower jacket, setting are in the lid side Second groove on side and the second protrusion that another relative side of the lid is set, second groove and described second convex It plays adaptation, for connecting multiple lids side by side, the electricity exposed for the electrode of the battery core is additionally provided at the top of the lid Pole through-hole is additionally provided with the retention bead abutted with the frame side on the side frame top at the top of the lid.

2. battery modules frame structure according to claim 1, which is characterized in that first groove and the second groove are Dovetail groove.

3. battery modules frame structure according to claim 1, which is characterized in that the side frame further includes from the plate body With the second through-hole edges of boards adjacent side outwardly extending fixed edge and be arranged on the fixed edge, the fixed edge Extending direction it is opposite with the extending direction of the edges of boards.

4. battery modules frame structure according to claim 1, which is characterized in that be additionally provided with heat dissipation on the deckle board Hole.

5. battery modules frame structure according to claim 4, which is characterized in that the battery modules frame structure is also wrapped It includes and the side frame is set back to the vortex flow fan on the side of the battery core, the air inlet side opening of the vortex flow fan is dissipated with described Hot hole is corresponding.

6. a kind of battery modules, which is characterized in that including battery modules frame structure described in any one of claims 1 to 5 And the battery core in the battery modules frame structure is set.

7. battery modules as claimed in claim 6, which is characterized in that the battery modules further include laths of metal and fixation The screw of the laths of metal is provided with connecting hole corresponding with the same sex electrode of the battery core on the laths of metal, described Screw passes through the connecting hole and is adapted to the screw hole on the same sex electrode.