Battery box group

Abstract

The utility model relates to the technical field of batteries, and particularly discloses a battery box group which comprises a box body, battery cells and a box cover, the box body is provided with a containing space and a cover opening; the battery cell is assembled in the accommodating space, and the outer surface, with the largest area, of the battery cell abuts against the inner wall of the box body; the box cover is connected to the cover opening so as to seal the containing space. Through the arrangement, the battery cell is fastened in the box body, dislocation in the assembling and carrying processes is avoided, the yield is ensured, the use of screws is reduced, the connecting structure between the box body and the battery cell is greatly simplified, the assembling efficiency is greatly improved, the production cost is reduced, the expansion amplitude of the battery cell is inhibited, and the product quality is improved. And displacement and dislocation of the battery cell due to extrusion of expansion force are avoided.

Description

Technical Field

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

[0002] To further solve the problem of energy volatility, it is necessary to integrate energy storage and other technologies into grid optimization and introduce energy storage equipment into base stations to effectively improve battery utilization and thus reduce power supply costs, among which the energy storage battery box is a very important part.

[0003] At present, most battery companies use locking screws to assemble energy storage battery boxes. This method requires manual assembly during assembly, and the product needs to be moved after assembly, which can easily cause battery cell misalignment and lead to poor product yield. In addition, the components need to be connected with screws, making the assembly process more cumbersome. In addition, the battery cells will expand during use, causing the battery cells to be squeezed by the expansion force and displaced. Utility Model Content

[0004] In order to solve at least one technical problem existing in the above-mentioned prior art, the utility model provides a battery box group, which continuously applies pressure to the outer surface with the largest area of ​​the battery cell through the inner wall of the box, which not only ensures that the battery cell is fastened in the box so as to prevent dislocation during assembly and transportation, but also reduces the use of screws, improves assembly efficiency, reduces production costs, and inhibits the expansion of the battery cell, thereby avoiding displacement and dislocation of the battery cell due to squeezing by the expansion force.

[0005] The technical solution adopted by the utility model to solve the problem is:

[0006] Battery box set, including:

[0007] A box body, the box body having a containing space and a cover;

[0008] The battery cell is assembled in the accommodation space, and the outer surface of the battery cell with the largest area abuts against the inner wall of the box, and the inner wall of the box exerts pressure on the outer surface of the battery cell with the largest area;

[0009] The box cover is mounted on the cover opening to close the accommodating space.

[0010] In some embodiments of the present invention, a bracket is further provided between the box cover and the battery cell, and the bracket is detachably connected to the inner wall of the box body and contacts the battery cell to compress the battery cell.

[0011] In some specific embodiments, a clamping groove is provided on the side of the bracket facing the box cover, a first fixing hole is provided on the inner wall of the box cover, a clamping piece is installed in the clamping groove, a second fixing hole is provided on the clamping piece corresponding to the first fixing hole, and the first fixing hole and the second fixing hole are connected by a fixing piece, so that the bracket can be detachably connected to the inner wall of the box body and contact with the battery cell.

[0012] In some embodiments of the utility model, there are at least two battery cells, each of which is divided into at least two rows, a liquid cooling plate is arranged between two adjacent rows of battery cells, and the box body is provided with a liquid inlet interface and a liquid outlet interface corresponding to the liquid inlet and liquid outlet of the liquid cooling plate respectively.

[0013] In some specific embodiments, a flow channel is provided inside the liquid cooling plate, one end of the flow channel is connected to the liquid inlet, and the other end is connected to the liquid outlet, and the flow channel is provided with heat dissipation teeth corresponding to each battery cell.

[0014] In some further examples, the width of a portion of the flow channel provided with the heat dissipation teeth is greater than the width of a portion of the flow channel not provided with the heat dissipation teeth.

[0015] In some specific embodiments, an insulating member is disposed between two adjacent battery cells in each row of battery cells.

[0016] In some embodiments of the utility model, a handle seat is provided on the outer peripheral side of the box body, the handle seat is provided with a groove, and the handle seat is also provided with a convex bump corresponding to the groove. A handle is rotatably buckled in the groove, and the convex bump limits the radial movement of the handle.

[0017] In some embodiments of the present invention, a slide groove is provided on the edge of the cover opening, and the box cover is slidably mounted on the cover opening along the slide groove.

[0018] In some embodiments of the utility model, a first mounting hole is provided on the edge of the box cover, and a second mounting hole is provided on the outer peripheral side of the box body corresponding to the first mounting hole. The first mounting hole and the second mounting hole are connected by a connecting piece so that the box cover can be removably fixed to the box body.

[0019] In summary, the battery box group provided by the utility model has the following technical effects:

[0020] The battery cells are assembled in the accommodating space, and the outer surface of the battery cells with the largest area is made to abut against the inner wall of the box body, and finally the box cover is mounted on the cover to close the accommodating space, so that the battery cells are fastened in the box body, and dislocation is avoided during assembly and transportation, thereby ensuring the yield rate and reducing the use of screws. The connection structure between the box body and the battery cells is greatly simplified, so that the assembly efficiency is greatly improved, the production cost is reduced, and the expansion amplitude of the battery cells is suppressed, thereby avoiding displacement and dislocation of the battery cells due to squeezing by the expansion force. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an overall schematic diagram of a battery box assembly embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of the assembly of the battery cells in the battery box assembly embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the assembly of the box cover in the battery box assembly embodiment of the utility model;

[0024] Figure 4 for Figure 3 A magnified schematic diagram of the middle A area;

[0025] Figure 5 This is a schematic diagram of the disassembly of a battery box assembly embodiment of the utility model;

[0026] Figure 6 It is a cross-sectional schematic diagram of a battery box assembly embodiment of the utility model;

[0027] Figure 7 for Figure 6 A magnified schematic diagram of the middle B area;

[0028] Figure 8 It is a schematic diagram of the disassembly of the liquid cooling plate in the battery box group embodiment of the utility model.

[0029] The meanings of the reference numerals are as follows:

[0030] 1. Box body; 11. Slide groove; 12. Liquid outlet interface; 13. Second mounting hole; 14. First fixing hole; 15. Handle seat; 150. Groove; 1501. Bump; 151. Handle; 16. Management module; 161. Output interface; 2. Battery cell; 20. Aluminum bar; 21. Liquid cooling plate; 210. Flow channel; 2101. Heat dissipation tooth; 211. Liquid inlet; 212. Liquid outlet; 213. Pressing plate; 3. Box cover; 30. Reinforcing rib; 31. First mounting hole; 4. Bracket; 40. Pressing groove; 41. Pressing piece; 411. Second fixing hole; 5. Connecting piece. DETAILED DESCRIPTION

[0031] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0033] It should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the description of the present invention are only for describing specific embodiments and are not intended to limit the present invention.

[0035] Example 1

[0036] according to Figure 1 As shown, the utility model provides a battery box assembly, comprising: a box body 1, a battery cell 2, and a box cover 3.

[0037] The box body 1 has a storage space and a cover; the battery cell 2 is assembled in the storage space, and the outer surface of the battery cell 2 with the largest area abuts against the inner wall of the box body 1, and the inner wall of the box body 1 forms pressure on the outer surface of the battery cell 2 with the largest area; the box cover 3 is assembled on the cover to close the storage space.

[0038] according to Figure 2 As shown, Figure 2 The arrow in the figure is the pre-tightening force applied by the clamp to the battery cell 2. The battery cell 2 is clamped and assembled into the accommodating space of the box 1 through the pre-tightening force applied by the clamp. The outer surface of the battery cell 2 with the largest area can abut against the inner wall of the box 1 by utilizing the rebound tendency of the battery cell 2, and the inner wall of the box 1 forms a relative pressure to compress the battery cell 2, so that the pre-tightening force is continuously maintained on the battery cell 2, so that the battery cell 2 remains in a clamped state; optionally, all four sides of the battery cell 2 can abut against the inner wall of the box 1, thereby applying pressure on all sides of the battery cell 2 to ensure that the battery cell 2 is clamped.

[0039] Through the above-mentioned arrangement, the battery cell 2 is fastened in the box body 1, avoiding misalignment during assembly and transportation, ensuring the yield rate, reducing the use of screws, greatly simplifying the connection structure between the box body 1 and the battery cell 2, greatly improving the assembly efficiency, and reducing the production cost. The expansion amplitude of the battery cell 2 can also be suppressed, avoiding displacement and misalignment of the battery cell 2 due to being squeezed by the expansion force.

[0040] In order to simplify the connection structure between the box cover 3 and the box body 1, a slide groove 11 is provided on the edge of the cover opening, and the box cover 3 is slidably mounted on the cover opening along the slide groove 11, thereby reducing the components used to connect the box cover 3 and the box body 1 and improving the assembly efficiency of the battery box group; furthermore, a first mounting hole 31 is provided on the edge of the box cover 3, and a second mounting hole 13 is provided on the outer peripheral side of the box body 1 corresponding to the first mounting hole 31. The first mounting hole 31 and the second mounting hole 13 are connected by a connecting member 5 so that the box cover 3 can be detachably fixed to the box body 1; in addition, a reinforcing rib 30 is provided on the box cover 3 to improve the strength of the box cover 3 and prevent the box cover 3 from being deformed due to pressure; in practice, the connecting member 5 can be set as a bolt.

[0041] according to Figure 5 As shown, preferably, a bracket 4 is further provided between the box cover 3 and the battery cell 2, and the bracket 4 is detachably connected to the inner wall of the box body 1 and contacts the battery cell 2, thereby exerting pressure on the battery cell 2 to compress the battery cell 2 so that the battery cell 2 is fastened in the accommodating space and cannot be misplaced; further, a clamping groove 40 is provided on the side of the bracket 4 facing the box cover 3, and a first fixing hole 14 is provided on the inner wall of the box cover 3, and a clamping piece 41 is mounted in the clamping groove 40, and a second fixing hole 411 is provided on the clamping piece 41 corresponding to the first fixing hole 14, and the first fixing hole 14 and the second fixing hole 411 are connected by a fixing piece, so that the bracket 4 is detachably connected to the inner wall of the box body 1 and contacts the battery cell 2; optionally, the clamping piece 41 can be set as a sheet metal strip, and the fixing piece can be set as a bolt.

[0042] according to Figure 6 and Figure 7 As shown, more preferably, a handle seat 15 is provided on the outer peripheral side of the box body 1, and the handle seat 15 is provided with a groove 150. The handle seat 15 is also provided with a convex bump 1501 corresponding to the groove 150. A handle 151 is rotatably buckled in the groove 150, and the convex bump 1501 limits the radial movement of the handle 151. Under the condition of ensuring the normal rotation of the handle 151, the handle 151 cannot slide out of the groove 150, thereby facilitating the transportation of the battery box group, reducing unstable factors in the transportation process, and ensuring the stability of the battery cell 2 during transportation.

[0043] In practice, there are at least two battery cells 2, each of which is divided into at least two rows. The battery cells 2 in each row are arranged in sequence, and a liquid cooling plate 21 is provided between the battery cells 2 in two adjacent rows. The box body 1 is provided with a liquid inlet interface and a liquid outlet interface 12 corresponding to the liquid inlet 211 and the liquid outlet 212 of the liquid cooling plate 21, respectively. The liquid inlet interface is used to connect the liquid inlet pipe so that the cooling liquid is input into the liquid cooling plate 21, and the liquid outlet interface 12 is used to connect the liquid outlet pipe to output the cooling liquid after absorbing heat, thereby reducing the temperature inside the battery box group, improving the temperature consistency inside the battery pack, and avoiding affecting the normal operation of the battery box group; wherein, the electrodes of adjacent battery cells 2 in each row are connected by aluminum bars 20, and the liquid cooling plate 21 adopts a double-sided heat dissipation mode; and the clamp applies a pre-tightening force to both ends of each row of battery cells 2 and both ends of the liquid cooling plate 21 between two adjacent rows of battery cells 2, so that each row of battery cells 2 and the liquid cooling plate 21 are clamped into a group, thereby being assembled into the accommodating space of the box body 1.

[0044] Specifically, a flow channel 210 is provided inside the liquid cooling plate 21, one end of the flow channel 210 is connected to the liquid inlet 211, and the other end is connected to the liquid outlet 212. The flow channel 210 is provided with heat dissipation teeth 2101 corresponding to each battery cell 2, so as to divert the coolant, and the heat dissipation teeth 2101 are arranged in a staggered manner to achieve the effect of slowing down the flow rate of the coolant and increasing the time for heat exchange between the coolant and the battery cell 2; more specifically, the width of the portion of the flow channel 210 provided with the heat dissipation teeth 2101 is greater than the width of the portion of the flow channel 210 not provided with the heat dissipation teeth 2101. To increase the contact area between the coolant and the battery cell 2 for heat exchange and improve the liquid cooling efficiency; further, the flow channel 210 is arranged in a serpentine shape so that the coolant can flow through various areas of the liquid cooling plate 21, thereby achieving liquid cooling of all contact surfaces of the liquid cooling plate 21, and correspondingly slowing down the flow rate of the coolant, so as to achieve the effect of complete heat absorption by the coolant; in actual processing, the flow channel 210 and the heat dissipation teeth 2101 can be first processed on the liquid cooling plate 21, and then the pressing plate 213 can be pressed and fixed on the liquid cooling plate 21 corresponding to the flow channel 210, so that the coolant can flow stably in the flow channel 210.

[0045] In actual use, an insulating member is provided between two adjacent battery cells 2 in each row of battery cells 2. On the one hand, the adjacent battery cells 2 are insulated to avoid accidental conduction that affects the normal operation of the battery box group and the risk of short circuit. On the other hand, the distance between adjacent battery cells 2 is increased, thereby increasing the electrical clearance and creepage distance, greatly improving the safety of the battery box group.

[0046] In order to achieve normal operation of the battery cells 2 in the battery pack, a management module 16 can be set to control and monitor the battery cells 2 to ensure that the battery cells 2 work under normal conditions. The management module 16 is provided with an output interface 161 to output the working data of the battery cells 2 to the monitoring device and the control device to complete the control and monitoring.

[0047] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. Although optional embodiments of the utility model embodiments have been described, once those skilled in the art know the basic creative concept, they can make additional changes and modifications to these embodiments. Therefore, the attached claims are intended to be interpreted as including optional embodiments and all changes and modifications that fall within the scope of the utility model embodiments.

[0048] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the article or terminal device including the elements.

[0049] The technical solution provided by the utility model is introduced in detail above. The principle and implementation mode of the utility model are explained in this article using specific examples. At the same time, for technicians in this field, according to the principle and implementation mode of the utility model, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A battery box assembly, characterized in that: include: A box body (1), the box body (1) having a containing space and a cover; A battery cell (2), the battery cell (2) being mounted in the accommodation space, and the outer surface of the battery cell (2) having the largest area abutting against the inner wall of the box body (1); A box cover (3), the box cover (3) being mounted on the cover opening to close the accommodating space; A bracket (4) is also provided between the box cover (3) and the battery cell (2); the bracket (4) is detachably connected to the inner wall of the box body (1) and in contact with the battery cell (2) to compress the battery cell (2).

2. The battery box assembly according to claim 1, characterized in that: The support (4) is provided with a clamping groove (40) on the side facing the box cover (3); the inner wall of the box cover (3) is provided with a first fixing hole (14); a clamping piece (41) is installed in the clamping groove (40); the clamping piece (41) is provided with a second fixing hole (411) corresponding to the first fixing hole (14); the first fixing hole (14) and the second fixing hole (411) are connected via a fixing piece, so that the support (4) can be detachably connected to the inner wall of the box body (1) and in contact with the battery cell (2).

3. The battery box assembly according to any one of claims 1 to 2, characterized in that: At least two battery cells (2) are provided, each of the battery cells (2) is divided into at least two rows, a liquid cooling plate (21) is provided between the battery cells (2) in two adjacent rows, and the box body (1) is provided with a liquid inlet interface and a liquid outlet interface (12) corresponding to the liquid inlet (211) and the liquid outlet (212) of the liquid cooling plate (21), respectively.

4. The battery box assembly according to claim 3, characterized in that: A flow channel (210) is provided inside the liquid cooling plate (21), one end of the flow channel (210) is connected to the liquid inlet (211), and the other end is connected to the liquid outlet (212), and the flow channel (210) is provided with heat dissipation teeth (2101) corresponding to each of the battery cells (2).

5. The battery box assembly according to claim 4, characterized in that: The width of a portion of the flow channel (210) provided with the heat dissipation teeth (2101) is greater than the width of a portion of the flow channel (210) not provided with the heat dissipation teeth (2101).

6. The battery box assembly according to claim 3, characterized in that: An insulating member is provided between two adjacent battery cells (2) in each row of the battery cells (2).

7. The battery box assembly according to any one of claims 1 to 2, characterized in that: A handle seat (15) is arranged on the outer peripheral side of the box body (1), the handle seat (15) is provided with a groove (150), and the handle seat (15) is also provided with a convex bump (1501) corresponding to the groove (150), and a handle (151) is rotatably buckled in the groove (150), and the convex bump (1501) limits the radial movement of the handle (151).

8. The battery box assembly according to any one of claims 1 to 2, characterized in that: The edge of the cover opening is provided with a sliding groove (11), and the box cover (3) is slidably mounted on the cover opening along the sliding groove (11).

9. The battery box assembly according to any one of claims 1 to 2, characterized in that: A first mounting hole (31) is provided on the edge of the box cover (3), and a second mounting hole (13) is provided on the outer peripheral side of the box body (1) corresponding to the first mounting hole (31), and the first mounting hole (31) and the second mounting hole (13) are connected via a connecting piece (5) so that the box cover (3) can be detachably fixed to the box body (1).

Images