Battery module

Abstract

The utility model relates to the technical field of batteries, and discloses a battery module which comprises a battery pack and a shell, the battery pack is provided with a plurality of battery cells, wherein gaps are formed among the battery cells; a first end plate; a second end plate; the at least two circuit boards respectively cover the sides, deviating from the battery cell, of the first end plate and the second end plate; the first ventilation holes respectively penetrate through the first end plate and the second end plate, and the first ventilation holes correspond to the gaps of the battery cells; the second ventilation holes are formed in the circuit board in a penetrating mode, and the second ventilation holes correspond to the first ventilation holes in the end plates on the same side; the shell is provided with an exhaust fan which is positioned on one side of the battery cell along the axial direction; according to the battery module provided by the utility model, through the first vent holes which are formed in the first end plate and the second end plate and are matched with the gaps of the battery cells and the second vent holes which are formed in the circuit board and are matched with the first vent holes, external cold air flows through the gaps of the battery cells, and hot air after heat exchange is exhausted through the exhaust fan; and the purpose of high-efficiency heat dissipation of the battery module is achieved.

Description

Technical Field

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

[0002] A battery module is a unit assembled from multiple battery cells, used to provide higher voltage and capacity; a battery module consists of several battery cells, connectors, a battery management system, a casing, etc.; a battery module connects battery cells in parallel or series to increase the energy storage capacity or voltage of the battery system.

[0003] In the prior art, the battery module has a compact structure, with multiple battery cells arranged closely and fixed along the battery module with the help of connectors, which are respectively fixed at both ends of the battery cells along the axial direction. As a result, the heat dissipation of the battery module along the axial direction of the battery cells is limited by the connectors, and the battery cells cannot effectively dissipate heat, causing the temperature inside the battery module to be too high or unevenly distributed. In addition, the poor heat dissipation capacity makes the battery module only suitable for low-rate charging and discharging. Once the charging and discharging rate is increased, heat accumulation will occur, greatly affecting the safety performance of the battery. Utility Model Content

[0004] In view of this, the utility model provides a battery module to solve the problem of poor heat dissipation ability of the battery module.

[0005] The utility model provides a battery module, comprising: a battery pack and a shell enclosed by the battery pack; the battery pack has: a plurality of battery cells, with gaps between the plurality of battery cells; a first end plate, arranged on one side of the battery cells along the axial direction, and fixed to the ends of the plurality of battery cells; a second end plate, arranged on the other side of the battery cells along the axial direction, and fixed to the ends of the plurality of battery cells; a circuit board, at least two of the circuit boards respectively covering the first end plate and the second end plate on one side away from the battery cells; a first ventilation hole, respectively penetrating the first end plate and the second end plate, the first ventilation hole corresponding to the gap between the battery cells; a second ventilation hole, penetrating the circuit board, the second ventilation hole corresponding to the first ventilation hole on the same side end plate, suitable for allowing air flow to pass through the gap between the battery cells to dissipate heat; the shell has: an exhaust fan, arranged at the shell and located on one side of the battery cells along the axial direction, suitable for exhausting air and dissipating heat.

[0006] Beneficial effect: by setting the first ventilation hole matched with the battery cell gap at the first end plate and the second end plate, and setting the second ventilation hole matched with the first ventilation hole at the circuit board, the battery cell gap, the first ventilation hole and the second ventilation hole constitute an air flow channel, and the air flow channel cooperates with the exhaust fan's exhaust and pressure reduction function, so that the external cold air flows through the battery cell gap along the air flow channel and exchanges heat, and the hot air after heat exchange is discharged through the exhaust fan, and the air flow flows along the axial direction of the battery cell and dissipates heat efficiently, so as to achieve the purpose of comprehensive and efficient heat dissipation of the battery module, and timely and effectively dissipate the heat in the center and any part of the battery module, and the overall temperature of the battery pack is uniform, which is suitable for high-rate charging and discharging scenarios; the heat is taken away by the circulation of air, which is energy-saving and environmentally friendly.

[0007] In an optional embodiment, the housing further comprises: a grille, which is provided at the housing and located at the other side of the battery core along the axial direction, suitable for ventilation and heat dissipation.

[0008] In an optional embodiment, a plurality of the battery cells are arranged in parallel and at intervals, and a plurality of gaps are provided between the battery cells.

[0009] In an optional embodiment, a plurality of the first ventilation holes are respectively provided through the first end plate and the second end plate, and the plurality of the first ventilation holes respectively correspond to the plurality of the gaps.

[0010] In an optional embodiment, a plurality of the second ventilation holes are arranged throughout the circuit board.

[0011] In an optional embodiment, the first end plate is parallel to the second end plate.

[0012] In an optional embodiment, the outer shell is composed of a base plate and a vertical plate fixed to the base plate; at least two of the vertical plates are respectively arranged on both sides of the battery cell along the axial direction; the exhaust fan is arranged at one of the vertical plates, and the grille is arranged at the other vertical plate.

[0013] In an optional implementation, a line connecting the centers of the first ventilation hole and the second ventilation hole is parallel to the axis of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of an explosion of a battery module of the utility model;

[0016] Figure 2 It is a schematic diagram from left to right of the battery module of the utility model;

[0017] Figure 3 It is a schematic diagram from right to left of the battery module of the utility model;

[0018] Figure 4 This is a schematic diagram of the assembly of the battery module of the utility model.

[0019] Description of reference numerals:

[0020] 1. Battery pack; 11. Battery cell; 12. First end plate; 13. Second end plate; 14. Circuit board; 15. First ventilation hole; 16. Second ventilation hole; 2. Casing; 21. Exhaust fan; 22. Grille; 23. Bottom plate; 24. Vertical plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Combine the following Figures 1 to 4 , describing an embodiment of the utility model.

[0026] According to an embodiment of the utility model, a battery module is provided, comprising: a battery pack 1 and a shell 2 enclosed by the battery pack 1; the battery pack 1 has: a plurality of battery cells 11, with gaps between the plurality of battery cells 11; a first end plate 12, which is arranged on one side of the battery cell 11 along the axial direction and is fixed to the ends of the plurality of battery cells 11; a second end plate 13, which is arranged on the other side of the battery cell 11 along the axial direction and is fixed to the ends of the plurality of battery cells 11, and the battery pack 1 uses the first end plate 12 and the second end plate 13 to fix and limit the battery cell 11; a circuit board 14, at least two circuit boards 14 are respectively covered on the first end plate 12 and the second end plate 13 is on the side away from the battery cell 11; the first ventilation hole 15 is respectively penetrated at the first end plate 12 and the second end plate 13, the first ventilation hole 15 is aligned with the gap of the battery cell 11, and is used to allow air flow to pass through the gap of the battery cell 11; the second ventilation hole 16 is penetrated at the circuit board 14, and the second ventilation hole 16 is aligned with the first ventilation hole 15 at the end plate on the same side; the shell 2 has: an exhaust fan 21, which is arranged at the shell 2 and is located on one side of the battery cell 11 along the axial direction, and is used for exhausting heat; the shell 2 is provided with a grille 22, the grille 22 is located on the other side of the battery cell 11 along the axial direction, and is used to let air into the interior of the shell 2, that is, the battery pack 1.

[0027] It should be noted that the multiple battery cells 11 are arranged in parallel and at intervals, and there are multiple gaps between the battery cells 11; the multiple first ventilation holes 15 are respectively penetrated through the first end plate 12 and the second end plate 13, and some ventilation holes on the first end plate 12 are aligned with the ventilation holes on the second end plate 13; the multiple first ventilation holes 15 are respectively aligned with the gaps between the multiple battery cells 11; the multiple second ventilation holes 16 are correspondingly penetrated through the circuit board 14; wherein, the heat of the battery cells 11 is efficiently dissipated.

[0028] The specific working process of the battery module is as follows: the battery cells 11 in the battery pack 1 generate heat during the charging and discharging process, the temperature in the battery pack 1 rises, the blades in the exhaust fan 21 rotate, and the hot air in the battery pack 1 is discharged, and the air pressure in the battery pack 1 drops immediately, and the external cold air enters the inside of the shell 2 through the grille 22, and enters the gap between the battery cells 11 through the first ventilation hole 15 and the second ventilation hole 16, exchanges heat with the battery cells 11, and is then discharged by the exhaust fan 21, and the external cold air is continuously introduced into the battery pack 1 to dissipate heat for the battery cells 11, thereby effectively reducing the working temperature of the battery cells 11; the gaps between the multiple battery cells 11 are aligned with the first ventilation hole 15 and the second ventilation hole 16, forming multiple air flow channels, and the external cold air flow passes through the multiple air flow channels at the same time, dissipating heat for the battery cells 11 at any position, so that the temperature of the entire battery pack 1 is uniform; the battery cells 11 at various positions are always contacted and exchanged with the external cold air during the working process, and the hot air flow after the heat exchange is quickly discharged by the exhaust fan 21, and the heat dissipation process is continuous and stable, thereby achieving the purpose of efficient heat dissipation.

[0029] Optionally, the center of the first ventilation hole 15 is aligned with the center of the second ventilation hole 16, so that the first ventilation hole 15 is precisely positioned at the second ventilation hole 16 to prevent deviation between the two and block the air intake, thereby maximizing the heat dissipation capacity of the battery module.

[0030] In this embodiment, by providing the first ventilation holes 15 matched with the gaps of the battery cells 11 at the first end plate 12 and the second end plate 13, and providing the second ventilation holes 16 matched with the first ventilation holes 15 at the circuit board 14, the gaps of the battery cells 11, the first ventilation holes 15 and the second ventilation holes 16 constitute an air flow channel, and the air flow channel cooperates with the exhaust and pressure reduction functions of the exhaust fan 21, so that the external cold air flows through the gaps of the battery cells 11 along the air flow channel and exchanges heat, and the hot air after the heat exchange is discharged through the exhaust fan 21, and the air flow flows along the axial direction of the battery cells 11 and dissipates heat efficiently, thereby achieving the purpose of comprehensive and efficient heat dissipation of the battery module, timely and effectively dissipating the heat from the center and any part of the battery module, and the overall temperature of the battery pack 1 is uniform, which is suitable for high-rate charging and discharging scenarios; the heat is taken away by the circulation of air, which is energy-saving and environmentally friendly.

[0031] In some embodiments, in combination Figure 1 As shown, the ends of multiple battery cells 11 are fixed to the first end plate 12 and the second end plate 13, the first end plate 12 and the second end plate 13 are arranged in parallel, and the battery cells 11 are arranged perpendicular to the first end plate 12 and the second end plate 13, so that the battery cells 11 are firmly fixed between the first end plate 12 and the second end plate 13, thereby ensuring the structural stability of the battery pack 1.

[0032] In some embodiments, in combination Figure 4As shown, the housing 2 is composed of a bottom plate 23 and a vertical plate 24 fixed to the bottom plate 23; at least two vertical plates 24 are spaced apart from each other on the bottom plate 23; the two vertical plates 24 are respectively located on both sides of the battery cell 11 along the axial direction; the exhaust fan 21 is arranged at one of the vertical plates 24, and the grille 22 is arranged at the other vertical plate 24.

[0033] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. Although the embodiments of the present utility model are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations are all within the scope defined by the present utility model.

Claims

1. A battery module, characterized in that: include: A battery pack (1) and a housing (2) enclosed around the battery pack (1); The battery pack (1) comprises: A plurality of battery cells (11), with gaps between the plurality of battery cells (11); A first end plate (12) is arranged on one side of the battery core (11) along the axial direction and is fixed to the ends of the plurality of battery cores (11); A second end plate (13) is arranged on the other side of the battery core (11) along the axial direction and is fixed to the ends of the plurality of battery cores (11); Circuit boards (14), at least two of the circuit boards (14) respectively covering the first end plate (12) and the second end plate (13) on a side facing away from the battery cell (11); First ventilation holes (15) are respectively provided through the first end plate (12) and the second end plate (13), and the first ventilation holes (15) correspond to the gap between the battery cells (11); A second ventilation hole (16) is provided through the circuit board (14), the second ventilation hole (16) corresponds to the first ventilation hole (15) on the end plate on the same side, and is suitable for allowing air flow to pass through the gap between the battery cells (11) to dissipate heat; The housing (2) has: An exhaust fan (21) is arranged at the housing (2) and located on one side of the battery core (11) along the axial direction, and is suitable for exhausting air and dissipating heat.

2. The battery module according to claim 1, characterized in that: The housing (2) further comprises: a grille (22) which is arranged at the housing (2) and located at the other side of the battery core (11) along the axial direction and is suitable for ventilation and heat dissipation.

3. The battery module according to claim 1, characterized in that: The plurality of battery cells (11) are arranged in parallel and at intervals, and a plurality of gaps are provided between the battery cells (11).

4. The battery module according to claim 3, characterized in that: The plurality of first ventilation holes (15) are respectively arranged through the first end plate (12) and the second end plate (13), and the plurality of first ventilation holes (15) respectively correspond to the plurality of gaps.

5. The battery module according to claim 4, characterized in that: A plurality of the second ventilation holes (16) are arranged through the circuit board (14).

6. The battery module according to claim 1, characterized in that: The center of the first ventilation hole (15) is aligned with the center of the second ventilation hole (16).

7. The battery module according to claim 1, characterized in that: The first end plate (12) is parallel to the second end plate (13).

8. The battery module according to claim 2, characterized in that: The housing (2) is composed of a bottom plate (23) and a vertical plate (24) fixed to the bottom plate (23); At least two of the vertical plates (24) are respectively arranged on two sides of the battery core (11) along the axial direction; The exhaust fan (21) is arranged at one of the vertical plates (24), and the grille (22) is arranged at the other vertical plate (24).

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