Battery module and battery pack

Abstract

The utility model relates to the field of new energy automobiles, in particular to a battery module and a battery pack. The battery module comprises a battery cell unit, at least one protective film and at least one adhesive layer, the protective film is located on one side of the battery cell unit, and the protective film is connected with a battery cell; the adhesive layer is connected with the protective film and the battery cell; the direction perpendicular to the protective film is a first preset direction, and the projection of the battery cell unit in the first preset direction is located in the contour of the protective film. The battery module is simple in structure and convenient to disassemble, so that the maintenance time is shortened, and the maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of new energy vehicles, and in particular to a battery module and a battery pack. Background Art

[0002] At present, new energy vehicles have rapidly entered ordinary people's homes. When a single cell of a battery pack has a problem and needs to be replaced, the battery pack must be disassembled to replace the faulty cell with a normal cell.

[0003] However, the battery pack in the prior art is not easy to disassemble, resulting in a long maintenance time. Utility Model Content

[0004] The utility model aims to provide a battery module and a battery pack, which have a simple structure and are easy to disassemble, thereby shortening the maintenance time and improving the maintenance efficiency.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In a first aspect, the utility model provides a battery module, comprising:

[0007] Battery cell unit;

[0008] at least one protective film, the protective film being located on one side of the battery cell unit and being connected to the battery cell unit; and

[0009] At least one adhesive layer is located between the protective film and the battery cell unit, and the adhesive layer is connected to the protective film and the battery cell unit.

[0010] In an optional embodiment, the battery cell unit includes a plurality of first battery cells and a plurality of second battery cells, and the plurality of first battery cells and the plurality of second battery cells are arranged alternately; each first battery cell is connected to one or two adjacent second battery cells.

[0011] In an optional embodiment, the battery module further includes a plurality of bus bars, each of which is connected to the front end of a first battery cell and the rear end of a second battery cell; or, each bus bar is connected to the rear end of a first battery cell and the front end of a second battery cell.

[0012] In an optional embodiment, a plurality of adhesive layers are provided, and the plurality of adhesive layers are arranged at intervals on the side where the battery cell unit and the protective film are connected.

[0013] In an optional embodiment, the thickness of the protective film is 0.5 mm-1 mm.

[0014] In an optional embodiment, the protective film is provided with a through hole, and the through hole is used for the detection end of the temperature sensor to pass through.

[0015] In an optional embodiment, the battery module further includes at least one end plate, which is located on one side of the battery cell unit and is connected to the battery cell unit and the protective film;

[0016] The battery cell unit includes a first side surface and a second side surface, the first side surface is connected to the protective film, and the second side surface is connected to the end plate.

[0017] In an optional embodiment, the protective film is provided with a mounting hole, and the battery module further includes a connector, which is connected to the protective film and the end plate through the mounting hole.

[0018] In an optional embodiment, the battery cell unit includes a plurality of battery cells, and the plurality of battery cells are arranged in an array;

[0019] The battery module also includes a plurality of insulating foams, and an insulating foam is arranged between two adjacent battery cells.

[0020] In a second aspect, the utility model provides a battery pack, comprising:

[0021] A shell and at least one of the aforementioned battery modules, wherein the battery module is disposed in the shell.

[0022] The beneficial effects of the embodiments of the utility model include:

[0023] The battery module includes a battery cell unit, at least one protective film and at least one adhesive layer. The protective film is located on one side of the battery cell unit and is connected to the battery cell; the adhesive layer is connected to the protective film and the battery cell; the direction perpendicular to the protective film is a first preset direction, and the projection of the battery cell unit in the first preset direction is located within the outline of the protective film.

[0024] The battery membrane group insulates and protects the battery cell by setting a protective film. The protective film covers the surface of the battery cell to improve the protection effect of the battery cell. The battery module sets a glue layer between the battery cell and the protective film, and uses the glue layer to stabilize the protective film and the battery cell. At the same time, the glue layer has the characteristics of elastic deformation to increase a certain moving space for the protective film and the battery cell, so that the battery module will not deform during operation, thereby improving the rigidity of the battery module. The battery module has a simple structure and is easy to disassemble during maintenance, saving maintenance time. At the same time, the weight of the battery module has been reduced, which improves the battery module's endurance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of a battery pack provided by an embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the structure of a battery module provided by an embodiment of the utility model from a first viewing angle;

[0028] Figure 3 An exploded schematic diagram of a battery module provided by an embodiment of the utility model;

[0029] Figure 4 A schematic diagram of the structure of the battery cell unit and the adhesive layer provided in an embodiment of the utility model;

[0030] Figure 5 A schematic diagram of the structure of a battery module provided by an embodiment of the utility model from a second viewing angle;

[0031] Figure 6 A schematic diagram of the structure of a protective film provided in an embodiment of the utility model.

[0032] Icon: 100-battery module; 110-battery cell unit; 111-first battery cell; 112-second battery cell; 120-protective film; 121-through hole; 130-glue layer; 140-bus; 150-insulating foam; 160-end plate; 170-insulating protective plate; 200-housing; 300-battery pack. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply 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 a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0037] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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.

[0039] In the prior art, when a cell in a battery pack fails, the failed cell needs to be repaired or replaced. However, in the process of removing the failed cell, the disassembly process is very cumbersome and the disassembly time is too long due to the complex structure of the battery module.

[0040] Please refer to Figure 1-Figure 6 , Figure 1 A schematic diagram of the structure of a battery pack 300 provided in an embodiment of the utility model; Figure 2 A schematic structural diagram of a battery module 100 provided in an embodiment of the utility model at a first viewing angle; Figure 3 An exploded schematic diagram of a battery module 100 provided in an embodiment of the present utility model; Figure 4 A schematic diagram of the structure of a battery cell unit 110 and a glue layer 130 provided in an embodiment of the utility model; Figure 5A schematic diagram of the structure of the battery module 100 provided by the embodiment of the utility model at a second viewing angle; Figure 6 A schematic diagram of the structure of the protective film 120 provided in an embodiment of the utility model.

[0041] Based on the above problems, the embodiment of the utility model provides a battery pack 300, which includes a housing 200 and at least one battery module 100, wherein the battery module 100 is located in the housing 200 and connected to the housing 200. In this embodiment, the battery pack 300 is provided with a plurality of battery modules 100 arranged in an array, so that when replacing a faulty battery cell, only the battery module 100 where the faulty battery cell is located needs to be disassembled, thereby improving maintenance efficiency.

[0042] The battery module 100 is described in detail below:

[0043] Please refer to Figure 2-Figure 6 The battery module 100 includes a battery cell unit 110, at least one protective film 120 and at least one glue layer 130. The protective film 120 is located on one side of the battery cell unit 110 and is connected to the battery cell unit 110. The glue layer 130 is located between the protective film 120 and the battery cell unit 110 and is connected to the protective film 120 and the battery cell unit 110.

[0044] Specifically, in the present embodiment, two protective films 120 are provided, and the two protective films 120 are respectively located on two opposite sides of the battery cell unit 110 . In other words, the battery cell unit 110 is located between the two protective films 120 .

[0045] It should be noted that, in this embodiment, the direction perpendicular to the protective film 120 is the first preset direction, and the projection of the battery cell unit 110 in the first preset direction is located within the outline of the protective film 120, that is, the protective film 120 covers the surface of the battery cell unit 110, thereby improving the insulation effect on the battery cell unit 110 and preventing the battery cell and other structures from conducting electricity and causing a short circuit.

[0046] It can be understood that the battery module 100 is provided with a glue layer 130 to fix the protective film 120 and the battery cell unit 110, thereby ensuring the stability of the battery cell unit 110 and the protective film 120. At the same time, the glue layer 130 has the characteristic of elastic deformation, so that there is a certain movement space between the protective film 120 and the battery cell unit 110, thereby preventing the battery module 100 from being deformed and causing damage to the battery module 100.

[0047] Based on the above settings, please refer to Figure 2-Figure 6In the present embodiment, a plurality of adhesive layers 130 are provided, wherein the plurality of adhesive layers 130 are arranged in parallel and at intervals, so that the connection between the protective film 120 and the battery cell unit 110 is stable, and during the disassembly process, it is convenient for the staff to separate the protective film 120 from the battery cell unit 110, so as to replace the faulty battery cell.

[0048] It should be noted that, in other embodiments, different adhesive layers 130 may intersect. In other embodiments, the adhesive layer 130 may be provided as one, and the contact area between the adhesive layer 130 and the battery cell unit 110 may be adjusted according to actual conditions.

[0049] It should also be noted that, in this embodiment, the battery cell unit 110 includes a plurality of battery cells arranged in an array along a second preset direction; a plurality of adhesive layers 130 are arranged in parallel and spaced apart along a third preset direction, wherein the first preset direction, the second preset direction and the third preset direction are perpendicular to each other.

[0050] In other embodiments, the third preset direction is perpendicular to the first preset direction, but not perpendicular to the second preset direction. In other embodiments, the plurality of adhesive layers 130 may also be arranged at intervals along the second preset direction.

[0051] In this embodiment, the adhesive layer 130 extends in a straight line. In other embodiments, the adhesive layer 130 may be bent.

[0052] For further information, please refer to Figure 2-Figure 6 The battery cell unit 110 includes a plurality of first battery cells 111 and a plurality of second battery cells 112 , and the plurality of first battery cells 111 and the plurality of second battery cells 112 are arranged alternately.

[0053] Specifically, the battery module 100 further includes a plurality of busbars 140, each of which is connected to the front end of a first battery cell 111 and the rear end of a second battery cell 112; or, each busbar 140 is connected to the rear end of a first battery cell 111 and the front end of a second battery cell 112. It can be understood that the first battery cell 111 is connected to one or two adjacent second battery cells 112 through the busbars 140. Thus, the battery module 100 connects the first battery cell 111 and the second battery cell 112 in series through the plurality of busbars 140, thereby improving the output power of the battery cell unit 110.

[0054] It should be noted that the first battery cell 111 and the second battery cell 112 have the same battery cell structure, the front end of the first battery cell 111 is the positive electrode, and the rear end of the first battery cell 111 is the negative electrode; the front end of the second battery cell 112 is the positive electrode, and the rear end of the second battery cell 112 is the negative electrode.

[0055] According to the above settings, in this embodiment, the thickness of the protective film 120 is 0.5mm-1mm, specifically, the thickness of the protective film 120 is 0.6mm, so as to ensure the insulation effect on the battery cell, reduce the weight of the battery module 100, and improve the endurance of the battery module 100.

[0056] It should be noted that, in the present embodiment, the battery cells in the battery cell unit 110 are short blade batteries, so as to improve the battery life of the battery module 100 .

[0057] For further information, please refer to Figure 2-Figure 6 The battery module 100 further includes a temperature sensor (not shown), the protective film 120 is provided with a through hole 121, and the temperature sensor passes through the through hole 121 and is connected to the battery cell. Specifically, in order to monitor the stability of the battery cell unit 110 in real time, the battery module 100 is provided with a temperature sensor connected to the battery cell unit 110, so as to detect the temperature of the battery cell unit 110.

[0058] In this embodiment, in order to avoid the influence of the protective film 120 on temperature detection, a through hole 121 is opened on the protective film 120, so that the detection end of the temperature sensor can be connected to the battery cell through the through hole 121, thereby improving the accuracy of the detected data.

[0059] It should be noted that, in this embodiment, the protective film 120 is provided with three through holes 121, one through hole 121 is located at the center of the protective film 120, and the other two through holes 121 are located at both sides of the protective film 120. It can be understood that the through hole 121 located in the middle corresponds to the battery cell in the middle of the battery cell unit 110, and the through holes 121 on both sides correspond to the battery cells on both sides of the battery cell unit 110; so that the temperature sensor can detect the temperature of the battery cell in the middle of the battery cell unit 110 and the temperature of the battery cells on both sides.

[0060] It is understandable that the temperature of the battery cell in the middle of the battery cell unit 110 is the highest, while the temperature on both sides is the lowest. Therefore, through the above settings, the highest temperature and the lowest temperature of the battery cell unit 110 can be detected, and the difference between the two temperatures can be calculated to determine whether the temperature of the battery cell unit 110 is balanced.

[0061] Based on the above settings, please refer to Figure 2-Figure 6 The battery module 100 further includes a plurality of insulating foams 150 , and an insulating foam 150 is disposed between two adjacent battery cells.

[0062] Specifically, the battery module 100 uses the insulating foam 150 to isolate the adjacent first battery cell 111 and the second battery cell 112 to avoid short circuit between the first battery cell 111 and the second battery cell 112. Also, the battery cells are prevented from contacting each other, which may cause a dry burn due to the temperature process of a single battery cell.

[0063] Furthermore, the battery module 100 also includes at least one end plate 160, which is located on one side of the battery cell unit 110 and is connected to the battery cell unit 110 and the protective film 120, wherein the battery cell unit 110 includes a first side and a second side, the first side is connected to the protective film 120, and the second side is connected to the end plate 160.

[0064] It should be noted that, in this embodiment, the contact surface between the protective film 120 and the battery cell unit 110 is the first side surface of the battery cell unit 110, and the contact surface between the end plate 160 and the battery cell unit 110 is the second side surface of the battery cell unit 110; wherein the first side surface and the second side surface are perpendicular to each other.

[0065] Please refer to Figure 2-Figure 6 In this embodiment, the protective film 120 is rectangular in shape, and four mounting holes are provided at four ends of the protective film 120; the battery module 100 further includes a plurality of connectors, such as bolts. Each bolt passes through a mounting hole to connect the protective film 120 and the end plate 160 together.

[0066] According to the above configuration, the battery module 100 further includes at least one insulating protection plate 170, which is located between the end plate 160 and the battery cell unit 110, and the insulating protection plate 170 is attached to the end plate 160 and the battery cell unit 110. Thus, the end plate 160 and the battery cell unit 110 are prevented from being short-circuited due to electrical conduction.

[0067] In summary, the battery module 100 includes a battery cell unit 110, at least one protective film 120 and at least one adhesive layer 130. The protective film 120 is located on one side of the battery cell unit 110, and the protective film 120 is connected to the battery cell; the adhesive layer 130 is connected to the protective film 120 and the battery cell; the direction perpendicular to the protective film 120 is the first preset direction, and the projection of the battery cell unit 110 in the first preset direction is located within the outline of the protective film 120.

[0068] The battery membrane group is provided with a protective film 120 to perform insulation protection on the battery cell unit 110 . The protective film 120 covers the surface of the battery cell unit 110 , thereby improving the protection effect on the battery cell unit 110 .

[0069] The battery module 100 sets a glue layer 130 between the battery cell unit 110 and the protective film 120, and uses the glue layer 130 to stabilize the protective film 120 and the battery cell unit 110. At the same time, the glue layer 130 has the characteristic of elastic deformation to increase a certain movement space for the protective film 120 and the battery cell unit 110, so that the battery module 100 will not be deformed during operation, thereby improving the rigidity of the battery module 100.

[0070] The battery module 100 has a simple structure, and is easy to disassemble during maintenance, saving maintenance time. At the same time, the weight of the battery module 100 is reduced, which improves the battery life of the battery module 100.

[0071] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery module, characterized in that: include: Battery cell unit; At least one protective film, the protective film is located on one side of the battery cell unit and is connected to the battery cell unit; as well as At least one glue layer, the glue layer is located between the protective film and the battery cell unit, and the glue layer is connected to the protective film and the battery cell unit.

2. The battery module according to claim 1, characterized in that: The battery cell unit includes a plurality of first battery cells and a plurality of second battery cells, wherein the plurality of first battery cells and the plurality of second battery cells are arranged alternately; each of the first battery cells is connected to one or two adjacent second battery cells.

3. The battery module according to claim 2, characterized in that: The battery module also includes a plurality of bus bars, each of which is connected to a front end of one of the first battery cells and a rear end of one of the second battery cells; or each of which is connected to a rear end of one of the first battery cells and a front end of one of the second battery cells.

4. The battery module according to any one of claims 1 to 3, characterized in that: The adhesive layer is provided in plurality, and the plurality of adhesive layers are arranged at intervals on the side surfaces where the battery cell unit and the protective film are connected.

5. The battery module according to any one of claims 1 to 3, characterized in that: The thickness of the protective film is 0.5 mm-1 mm.

6. The battery module according to any one of claims 1 to 3, characterized in that: The protective film is provided with a through hole, and the through hole is used for the detection end of the temperature sensor to pass through.

7. The battery module according to any one of claims 1 to 3, characterized in that: The battery module further includes at least one end plate, the end plate is located on one side of the battery cell unit, and the end plate is connected to the battery cell unit and the protective film; The battery cell unit includes a first side surface and a second side surface, the first side surface is connected to the protective film, and the second side surface is connected to the end plate.

8. The battery module according to claim 7, characterized in that: The protective film is provided with a mounting hole, and the battery module further comprises a connecting piece, and the connecting piece is connected to the protective film and the end plate through the mounting hole.

9. The battery module according to any one of claims 1 to 3, characterized in that: The battery cell unit includes a plurality of battery cells, and the plurality of battery cells are arranged in an array; The battery module also includes a plurality of insulating and heat-insulating foams, and one of the insulating and heat-insulating foams is arranged between two adjacent battery cells.

10. A battery pack, characterized in that: include: A shell and at least one battery module as claimed in any one of claims 1 to 9, wherein the battery module is arranged in the shell.

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