Battery module

Abstract

The utility model relates to the technical field of batteries, and particularly discloses a battery module which comprises a box body, a heat dissipation plate and a box cover, an air inlet communicated with the interior of the box body is formed in the bottom of the box body; an air inlet hole and an air outlet hole are formed in the two opposite sides of the heat dissipation plate respectively, the heat dissipation plate is installed in the box body, and the air inlet hole corresponds to the air inlet; the box cover is provided with an air outlet, the box cover is connected to the cover opening of the box body, and the air outlet corresponds to the air outlet hole. By means of the arrangement, a heat dissipation structure from bottom to top is achieved, air cooling can completely flow through the battery cells, complete heat dissipation of the battery cells is achieved, and the temperature consistency in the box body is greatly improved.

Description

Technical Field

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

[0002] With the transformation of energy development, in order 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 in base stations to effectively improve battery utilization and thus reduce power supply costs. The energy storage battery box is a very important part.

[0003] When the energy storage battery box is working, the internal cells will heat up and expand, so it is necessary to dissipate heat inside the energy storage battery box. However, most of the current energy storage battery boxes are only equipped with a simple air-cooled heat dissipation structure, such as a cooling fan, which means that only part of the battery cells can be dissipated, but the battery cells cannot be completely dissipated. The part of the battery cell that cannot dissipate heat will still overheat and expand, so there is still a risk of overheating and explosion. Moreover, most battery companies weld the wiring harness to the connecting bar when assembling the energy storage battery box, and then fix it with glue. Since it takes a certain amount of time for the glue to cure, this reduces production efficiency. 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 module, which, by setting a heat dissipation structure from bottom to top, allows air cooling to flow completely through the battery cells in the box, thereby achieving complete heat dissipation of the battery cells and greatly improving the temperature consistency in the box.

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

[0006] Battery module, including:

[0007] The box body has an air inlet at the bottom thereof connected to the box body;

[0008] The heat sink has air inlet holes and air outlet holes on opposite sides thereof. The heat sink is installed in the box body, and the air inlet holes are arranged corresponding to the air inlet holes.

[0009] The battery cell is installed in the box body by contacting the heat dissipation surface of the heat dissipation plate;

[0010] The box cover is provided with an air outlet, the box cover is mounted on the cover of the box body, and the air outlet is arranged corresponding to the air outlet hole.

[0011] In some embodiments of the present invention, the air inlet, the air inlet hole, the air outlet hole and the air outlet are arranged on the same plane.

[0012] In some embodiments of the present utility model, there are at least two groups of battery cells, and there is at least one heat dissipation plate. Adjacent two groups of battery cells are respectively abutted against different heat dissipation surfaces of the heat dissipation plate to form a battery module.

[0013] In some more specific embodiments, there are four groups of battery cells, and the heat dissipation plate is arranged in a cross shape to divide the space inside the box into four parts. Each group of battery cells is respectively installed in each part and abutted against different heat dissipation surfaces of the heat dissipation plate to form a battery module.

[0014] In some more specific embodiments, there are eight groups of battery cells, and the heat dissipation plate is arranged in a rich character shape to divide the space inside the box into eight parts. Each group of battery cells is respectively installed in each part and abutted against different heat dissipation surfaces of the heat dissipation plate to form a battery module.

[0015] In some embodiments of the present utility model, the box cover is provided with reinforcing ribs.

[0016] In some embodiments of the present utility model, a handle seat is arranged on the outer peripheral side of the box body. The handle seat is provided with a groove, and a handle is rotatably buckled in the groove.

[0017] In some embodiments of the present utility model, a bracket is arranged between the box cover and the battery cells. The bracket is detachably connected to the inner wall of the box body and exerts pressure on the battery cells to press the battery cells tightly.

[0018] In some more specific embodiments, a pressing groove is arranged on the side of the bracket facing the box cover. The inner wall of the box cover is provided with a first fixing hole. A pressing member is installed in the pressing groove. The pressing member is provided with a second fixing hole corresponding to the first fixing hole. The first fixing hole and the second fixing hole are connected by a fixing member, so that the bracket is detachably connected to the inner wall of the box body and exerts pressure on the battery cells.

[0019] In some more specific embodiments, a PCB board with a wireless control function and a connecting row connecting the battery cells are further arranged between the box cover and the bracket. The PCB board and the connecting row are electrically connected to wirelessly control the operation of the battery cells.

[0020] In summary, the battery module provided by the present utility model has the following technical effects:

[0021] By providing an air inlet communicating with the inside of the box at the bottom of the box body, then installing the heat dissipation plate inside the box body, then making the air inlet hole correspond to the air inlet, and installing the battery cells in the box body by abutting against the heat dissipation surface of the heat dissipation plate, and finally providing an air outlet on the box cover and installing the box cover on the cover opening of the box body, making the air outlet correspond to the air outlet hole, a heat dissipation structure from bottom to top is realized, so that the air cooling can completely flow through the battery cells, realizing complete heat dissipation of the battery cells, and greatly improving the temperature consistency inside the box. Description of the Drawings

[0022] Figure 1 A first stereoscopic view of a battery module embodiment of the present utility model;

[0023] Figure 2 A second stereoscopic view of a battery module embodiment of the present utility model;

[0024] Figure 3 It is a schematic diagram of the interior of a battery module embodiment of the utility model;

[0025] Figure 4 This is a schematic diagram of the disassembly of a battery module embodiment of the utility model;

[0026] Figure 5 This is an exploded view of the handle in the battery module embodiment of the present utility model;

[0027] Figure 6 for Figure 5 A magnified image of area A;

[0028] Figure 7 It is a combination diagram of the handle in the battery module embodiment of the utility model;

[0029] Figure 8 for Figure 7 Magnified view of area B.

[0030] The meanings of the reference numerals are as follows:

[0031] 1. Box body; 11. Air inlet; 12. Handle base; 121. Handle; 121a. First half; 121b. Second half; 1211. Mounting hole; 1212. Snap-in hole; 1213. Spring piece; 1214. Bump; 13. Management module; 131. Output interface; 2. Heat sink; 22. Air outlet; 3. Box cover; 31. Air outlet; 32. Reinforcement rib; 4. Battery cell; 5. Bracket; 50. Pressing groove; 6. PCB board; 7. Connecting row. DETAILED DESCRIPTION

[0032] 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 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Example 1

[0037] according to Figure 1 As shown, the utility model provides a battery module, including: a box body 1, a heat sink 2, and a box cover 3.

[0038] Among them, the bottom of the box body 1 is provided with an air inlet 11 connected to the box body 1; the opposite sides of the heat sink 2 are respectively provided with air inlet holes and air outlet holes 22, the heat sink 2 is installed in the box body 1, and the air inlet holes are arranged corresponding to the air inlet 11; the box cover 3 is provided with an air outlet 31, the box cover 3 is attached to the cover of the box body 1, and the air outlet 31 is arranged corresponding to the air outlet holes 22.

[0039] Through the above-mentioned arrangement, a bottom-up heat dissipation structure is realized, so that the air cooling can completely flow through the battery cell 4, thereby completely dissipating the heat of the battery cell 4 and greatly improving the temperature consistency in the box body 1; specifically, the air inlet 11, the air inlet hole, the air outlet 22 and the air outlet 31 are arranged in the same plane, ensuring that the airflow stably dissipates heat from bottom to top and avoiding uneven heat dissipation caused by airflow instability.

[0040] Furthermore, the battery cell 4 also abuts against the inner wall of the box body 1, so that the battery cell 4 forms a tight fit with the heat dissipation plate 2 and the box body 1; Further still, at least two groups of battery cells 4 are provided, and at least one heat dissipation plate 2 is provided. During installation, a pre-tightening force is applied to the battery cells 4 and the heat dissipation plate 2 through a fixture, so that adjacent two groups of battery cells 4 respectively abut against different heat dissipation surfaces of the heat dissipation plate 2 to form a battery module and then are tightly fitted into the box body 1. By utilizing the tendency of the battery cell 4 to rebound, the battery cell 4 can abut against the inner wall of the box body 1, and the inner wall of the box body 1 forms a relative pressure, thereby pressing the battery module, keeping the pre-tightening force continuously on the battery module, making the battery module remain in a clamped state, and further suppressing the expansion amplitude of the battery cell 4, avoiding the displacement and misalignment of the battery cell 4 due to the extrusion of the expansion force.

[0041] Optionally, four groups of battery cells 4 are provided, and the heat dissipation plate 2 is arranged in a cross shape to divide the space in the box body 1 into four parts. Each group of battery cells 4 is respectively installed in each part and abuts against different heat dissipation surfaces of the heat dissipation plate 2 to form a battery module; Or, eight groups of battery cells 4 are provided, and the heat dissipation plate 2 is arranged in a rich font shape to divide the space in the box body 1 into eight parts. Each group of battery cells 4 is respectively installed in each part and abuts against different heat dissipation surfaces of the heat dissipation plate 2 to form a battery module.

[0042] Moreover, each group of battery cells 4 includes at least two battery cells 4, and adjacent two battery cells 4 are insulated from each other; In fact, an insulating member is provided between adjacent two battery cells 4. On the one hand, it insulates adjacent battery cells 4 from each other, avoiding accidental conduction from affecting the normal operation of the battery box group and also avoiding the risk of short circuit. On the other hand, it increases the distance between adjacent battery cells 4, thereby increasing the electrical clearance and creepage distance and greatly improving the safety of the battery box group.

[0043] Preferably, the box cover 3 is provided with reinforcing ribs 32 to enhance the strength of the box cover 3 and prevent the box cover 3 from being deformed by pressure; more preferably, a handle seat 12 is provided on the outer peripheral side of the box body 1, and the handle seat 12 is provided with a groove, and a handle 121 is rotatably buckled in the groove, which is convenient for carrying the battery box group, reduces unstable factors during the transportation process, and ensures the stability of the battery cell 4 during transportation; wherein the handle 121 includes a first half 121a and a second half 121b, and the end of the first half 121a used to connect to the second half 121b is provided with a mounting hole 1211, and the peripheral side of the end of the first half 121a is provided with a connecting hole connected to the mounting hole 1211, and the second half 121b is used to connect to the second half The end of the half portion 121a is provided with a spring piece 1213 corresponding to the mounting hole 1211, and the spring piece 1213 is provided with a convex bump 1214 corresponding to the clamping hole 1212. The spring piece 1213 is mounted on the mounting hole 1211, so that the convex bump 1214 is clamped in the clamping hole 1212 under the elastic force of the spring piece 1213, so that the first half portion 121a and the second half portion 121b form the handle 121, thereby realizing the plug-in assembly method of the handle 121, making the assembly of the handle 121 easier. Moreover, through this method, there is no need to set an additional structure to limit the handle, and the handle 121 can be installed directly by cutting a groove on the outer peripheral side of the box body 1, which greatly reduces the production cost.

[0044] In order to stabilize the battery cell 4 in the box body 1, a bracket 5 is arranged between the box cover 3 and the battery cell 4, and the bracket 5 is detachably connected to the inner wall of the box body 1 and exerts pressure on the battery cell 4 to compress the battery cell 4; more specifically, the bracket 5 is provided with a compression groove 50 on the side facing the box cover 3, and a first fixing hole is provided on the inner wall of the box cover 3, and a compression piece is installed in the compression groove 50, and a second fixing hole is provided on the compression 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 5 can be detachably connected to the inner wall of the box body 1 and exerts pressure on the battery cell 4; optionally, the compression piece can be set as a sheet metal strip, and the fixing piece can be set as a bolt.

[0045] In order to improve the convenience of use and production efficiency, a PCB board 6 (Printed Circuit Board) with a wireless control function and a connecting row 7 connected to the battery cell 4 are also arranged between the box cover 3 and the bracket 5. The PCB board 6 and the connecting row 7 are electrically connected to wirelessly control the operation of the battery cell 4, so there is no need to weld the wire harness to the connecting row 7 and fix it with glue to assemble the battery cell 4 control component; in actual application, a management module 13 for obtaining the operating data of the battery cell 4 is also arranged in the box body 1, and an output interface 131 connected to the management module 13 is arranged on the outer peripheral side of the box body 1, so that the operating data of the battery cell 4 can be output to the monitoring device.

[0046] Furthermore, a temperature sampling function block is provided on the connecting bar 7, which can collect the temperature data of the battery cell 4 and transmit it to the management module 13 so as to be output to the monitoring device for monitoring; and, a temperature sampling comparison block is also provided on the connecting bar 7, which can compare the temperature data of the battery cell 4 collected at different times and transmit it to the management module 13 so that the monitoring device can determine whether the temperature of the battery cell 4 is abnormal, thereby issuing an early warning.

[0047] In addition, the connecting row 7 is provided with a pressure sampling function block, which can collect the expansion data of the battery cell 4 and transmit it to the management module 13 so as to be output to the monitoring device for monitoring; and, the connecting row 7 is also provided with a pressure sampling comparison block, which can compare the expansion data of the battery cell 4 collected at different times and transmit it to the management module 13 so that the monitoring device can determine whether the battery cell 4 is over-expanded, thereby issuing an early warning.

[0048] 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.

[0049] 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.

[0050] 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 module, characterized in that: include: A box body (1), wherein the bottom of the box body (1) is provided with an air inlet (11) connected to the box body (1); A heat sink (2), wherein two opposite sides of the heat sink (2) are respectively provided with an air inlet hole and an air outlet hole (22), and the heat sink (2) is installed in the box (1), and the air inlet hole is arranged corresponding to the air inlet port (11); A battery core (4), the battery core (4) being mounted in the box body (1) so as to abut against the heat dissipation surface of the heat dissipation plate (2); A box cover (3), wherein the box cover (3) is provided with an air outlet (31), the box cover (3) is mounted on the cover of the box body (1), and the air outlet (31) is arranged corresponding to the air outlet hole (22).

2. The battery module according to claim 1, characterized in that: The air inlet (11), the air inlet hole, the air outlet hole (22) and the air outlet (31) are arranged on the same plane.

3. The battery module according to claim 1 or 2, characterized in that: At least two groups of battery cells (4) are provided, and at least one heat dissipation plate (2) is provided. Two adjacent groups of battery cells (4) are respectively in contact with different heat dissipation surfaces of the heat dissipation plate (2) to form a battery module.

4. The battery module according to claim 3, characterized in that: The battery cells (4) are arranged in four groups, and the heat sink (2) is arranged in a cross shape to divide the space in the box (1) into four parts. Each group of the battery cells (4) is installed in each part and abuts against different heat dissipation surfaces of the heat sink (2) to form a battery module.

5. The battery module according to claim 3, characterized in that: The battery cells (4) are arranged in eight groups, and the heat sink (2) is arranged in a "F" shape to divide the space in the box (1) into eight parts. Each group of the battery cells (4) is installed in each part and abuts against different heat dissipation surfaces of the heat sink (2) to form a battery module.

6. The battery module according to claim 1 or 2, characterized in that: The box cover (3) is provided with reinforcing ribs (32).

7. The battery module according to claim 1 or 2, characterized in that: A handle seat (12) is arranged on the outer peripheral side of the box body (1), and the handle seat (12) is provided with a groove, in which a handle (121) is rotatably buckled.

8. The battery module according to claim 1 or 2, characterized in that: A bracket (5) is provided between the box cover (3) and the battery core (4); the bracket (5) is detachably connected to the inner wall of the box body (1) and exerts pressure on the battery core (4) to compress the battery core (4).

9. The battery module according to claim 8, characterized in that: The bracket (5) is provided with a clamping groove (50) on the side facing the box cover (3), the inner wall of the box cover (3) is provided with a first fixing hole, a clamping piece is installed in the clamping groove (50), the clamping piece is provided with a second fixing hole corresponding to the first fixing hole, the first fixing hole and the second fixing hole are connected via a fixing piece, so that the bracket (5) can be detachably connected to the inner wall of the box body (1) and exerts pressure on the battery cell (4).

10. The battery module according to claim 8, characterized in that: A PCB board (6) with a wireless control function and a connection row (7) connected to the battery cell (4) are also provided between the box cover (3) and the bracket (5); the PCB board (6) and the connection row (7) are electrically connected to wirelessly control the operation of the battery cell (4).

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