Battery module and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery module and electric equipment, the battery module comprises a battery cell group, the top of the battery cell group is provided with an insulating tray; the heating film comprises a connecting part and a heating part, the connecting part is detachably connected with the insulating tray, the heating part is used for being adhered to the side surface of the battery cell group, and the connecting part and the heating part are in angular connection. According to the battery module and the electric equipment disclosed by the utility model, the heating film can better heat the battery cell group.

Description

Technical Field

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

[0002] The battery module comprises a battery cell group and a heating film, wherein the heating film is attached to the side of the battery cell group so that the heating film can effectively heat the battery cell group.

[0003] The existing battery cell module has the following defects: the heating film is pasted on the side of the battery cell group, and the temperature of the battery cell group changes greatly. After the battery cell group is used for a long time, the adhesive layer will easily fail, causing the heating film to fall off, and the fixing effect of the heating film is poor.

[0004] In view of this, it is necessary to design a battery module and an electrical device to further improve the fixing effect of the heating film so that the heating film can better heat the battery cell group. Utility Model Content

[0005] The utility model aims to provide a battery module and an electrical device to further improve the fixing effect of the heating film so that the heating film can better heat the battery cell group.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A battery module, comprising:

[0008] A battery cell group, with an insulating tray disposed on the top of the battery cell group;

[0009] The heating film comprises a connecting portion detachably connected to the insulating tray and a heating portion for being adhered to the side surface of the battery cell group, wherein the connecting portion and the heating portion are connected at an angle.

[0010] Optionally, a first bending fold is provided between the connecting portion and the heating portion, and the connecting portion and the heating portion can be bent relative to each other around the first bending fold.

[0011] Optionally, a connecting hole is formed on the connecting portion, and a pressing piece is provided on the insulating tray, extending into the connecting hole and connected to the insulating tray.

[0012] Optionally, a high temperature resistant adhesive layer is provided on one side surface of the heating portion.

[0013] Optionally, one of the heating films is provided with a male plug, and the other of the heating films is provided with a female plug;

[0014] The male plug is plug-connected with the female plug so that two adjacent heating films are connected to each other.

[0015] Optionally, a plug-in groove is provided on the plug-in portion of the male plug, a plug-in connection groove is provided on the female plug corresponding to the plug-in portion, and a plug-in protrusion is provided on the groove wall of the plug-in connection groove;

[0016] When the male plug is plug-connected with the female plug, the plug-in protrusion is inserted into the plug-in groove.

[0017] Optionally, the male plug is provided with a heat-insulating groove, and an aerogel film layer is provided on the groove wall of the heat-insulating groove.

[0018] Optionally, the heating film is provided on two opposite sides of the battery cell group.

[0019] Optionally, a clamping portion for clamping with the insulating tray is provided on the connecting portion.

[0020] An electrical device comprises a battery module as described in any one of the above items.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] In this embodiment, the heating film includes a heating portion that is attached to the battery cell and a connecting portion for connecting to an insulating tray, and the insulating tray is located on the top side of the battery cell group, so that the heating portion can be better maintained on the side of the battery cell group; even if the adhesive layer used to stick the heating portion has reduced adhesion due to aging, under the action of the connecting portion, the heating film will not fall off quickly due to external vibrations and the like, so that the heating portion can remain attached to the battery cell group for a longer time, further improving the heating stability of the heating portion, and is beneficial to increasing the service life of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0025] Figure 1 A schematic top view of a battery module provided by an embodiment of the utility model;

[0026] Figure 2 A schematic diagram of the three-dimensional structure of a battery module provided in an embodiment of the utility model;

[0027] Figure 3 for Figure 2 A magnified schematic diagram of position A in the middle;

[0028] Figure 4 A schematic diagram of the connection of two heating films provided in an embodiment of the utility model;

[0029] Figure 5 for Figure 4 A schematic side view of the structure in FIG.

[0030] Figure 6 for Figure 4 A schematic diagram of the three-dimensional structure of the middle structure from another perspective;

[0031] Figure 7 for Figure 6 A magnified schematic diagram of position A in the middle;

[0032] Figure 8 for Figure 6 A magnified schematic diagram of position B in the middle;

[0033] Fig. 9 A three-dimensional schematic diagram of a male plug provided in an embodiment of the utility model;

[0034] Fig.10 A three-dimensional schematic diagram of a female plug provided in an embodiment of the utility model.

[0035] Illustrations: 1. Battery cell group; 2. Insulation tray; 3. Heating film; 31. Connecting part; 32. Heating part; 321. High temperature resistant adhesive layer; 301. First bending crease; 311. Connecting hole; 41. Male plug; 401. Insulating groove; 402. Aerogel film layer; 403. Plug-in groove; 42. Female plug; 421. Plug-in protrusion. DETAILED DESCRIPTION

[0036] In order to make the utility model's purpose, features, and advantages more obvious and easy to understand, the following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the embodiments described below are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", 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 a limitation on the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0038] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0039] The embodiment of the utility model provides a battery module, which can help keep the heating part 32 on the side of the battery cell group 1 for a longer time, so that the heating film can better heat the battery cell group 1.

[0040] See also Figures 1 to 10 , the battery module includes:

[0041] A battery cell group 1, with an insulating tray 2 disposed on the top of the battery cell group 1; a CCS component is generally mounted on the insulating tray 2.

[0042] The heating film 3 includes a connecting portion 31 detachably connected to the insulating tray 2 and a heating portion 32 for sticking to the side of the battery cell group 1, and the connecting portion 31 and the heating portion 32 are connected at an angle. The connection at an angle means that the connecting portion 31 and the heating portion 32 are relatively bent, so that an angle is formed between the connecting portion 31 and the heating portion 32. Generally, the angle is 90°, and of course the angle can also be set according to actual conditions.

[0043] In this embodiment, the connection part 31 is detachably connected to the insulating tray 2, and can provide support for the heating part 32, and the heating part 32 is adhered to the side of the battery cell group 1 to complete the fixation of the heating film 3. It should be particularly noted that, under the support of the connection part 31, the heating film 3 generally only needs a smaller adhesive force to remain adhered to the side of the battery cell group 1. The connection part 31 is connected to the insulating tray 2, which further improves the fixing effect of the heating film 3 and can effectively prevent the heating film 3 from detaching from the side of the battery cell group 1, so that the heating film 3 can better heat the battery cell group 1, and the heating film 3 can better heat the battery cell group 1.

[0044] It should also be noted that the connection portion 31 can be fixed to the insulating tray 2 by means of a threaded connection, fixed to the insulating tray 2 by means of a pressing fastener, fixed to the insulating tray 2 by means of a clamping structure, or fixed to the insulating tray by means of other detachable fixing structures.

[0045] It should also be noted that the heating film 3 used in this embodiment is formed by a polyimide PI hot-pressed nickel-chromium alloy resistance wire process, and a plurality of resistance wires are arranged in the heating film 3. The heating film 3 is powered by the battery cells in the battery cell group 1 and is controlled by a battery control system. The heating film in this embodiment has the advantages of being light and soft, not taking up space, and having good thermal conductivity. It is attached to the side of the battery cell group 1 to achieve rapid heating of the battery cell group. The temperature inside the existing battery module is relatively high, and in order to ensure a safe space, the side space of the battery module is relatively large from the battery package side beam, which will cause the battery cell module to dissipate heat quickly and the temperature to be low, resulting in uneven temperature rise in the battery module, which will cause temperature stratification in the battery cell group and accelerate the life decay of the battery cell group. In this embodiment, a side wrapping heating scheme is adopted, which can make the temperature of the battery module always tend to be stable, and can increase the service life of the battery cell group. Of course, it should be specially noted that other types of heating films 3 may also be used, as long as the heating film 3 includes a connecting portion 31 detachably connected to the insulating tray 2 and a heating portion 32 for sticking to the side of the battery cell group 1, and the connecting portion 31 and the heating portion 32 are connected to each other.

[0046] Optionally, a first bending fold 301 is provided between the connection portion 31 and the heating portion 32, and the connection portion 31 and the heating portion 32 can be relatively bent around the first bending fold. Specifically, the first bending fold 301 is provided to effectively facilitate the installation of the heating film 3, that is, the heating film 3 does not need to be re-bent during installation. In this embodiment, the connection portion 31 can be directly fixed on the insulating tray 2, and then the heating portion 32 can be rotated around the first bending fold 301, so that the heating portion 32 is attached to the side of the battery cell group 1.

[0047] Optionally, a connection hole 311 is provided on the connection portion 31, and a pressing piece is provided on the insulation tray 2 to extend into the connection hole 311 and connect to the insulation tray 2. One end of the pressing piece is inserted into the connection hole 311, so that the connection portion 31 is pressed and fixed on the insulation tray 2. The pressing piece is connected to the insulation tray 2 by threading, snapping, plugging or other methods, as long as the pressing piece can be inserted into the connection hole 311 and press the connection portion 31.

[0048] Optionally, a high temperature resistant adhesive layer 321 is provided on the surface of the heating portion 32 facing the connecting portion 31, and the heating portion 32 is adhered to the side of the battery cell group 1 through the high temperature resistant adhesive layer 321. The high temperature resistant adhesive layer 321 is provided on the heating portion 32, so there is no need to coat the side of the battery cell group 1 with an adhesive layer, which can effectively facilitate the assembly of the battery module. In addition, the temperature resistance of the high temperature resistant adhesive layer 321 is usually above 120°C, which can effectively avoid the decrease in the adhesion effect caused by high temperature, thereby better keeping the heating portion 32 on the side of the battery cell group 1.

[0049] Optionally, at least two heating films are provided on the same side of the battery cell group 1, a male plug 41 is provided on one heating film 3, and a female plug 42 used in conjunction with the male plug 41 is provided on the other heating film 3; the male plug 41 is plug-connected with the female plug 42 to connect two adjacent heating films 3 to each other.

[0050] Specifically, in the actual installation process, due to the different length specifications of the battery cell group 1, the total length of the heating film 3 is usually difficult to match the total length of the battery cell group 1. In this embodiment, the heating films 3 can be plugged in and connected, so different numbers of heating films 3 can be connected, so that the total length of the heating film 3 matches the side length of one side of the battery cell group; that is, the heating of one battery cell group 1 is achieved by at least two plug-in connected heating films 3. It should also be noted that the battery module may include a plurality of battery cell groups 1, generally an even number of battery cell groups 1, and a heating film 3 is provided on the side of each battery cell group 1, and two adjacent heating films 3 are plug-in connected. It should also be noted that a heating film 3 can also be used to cool two battery cell groups 1, and so on.

[0051] Optionally, the male plug 41 is provided with a plug-in portion 411, and the plug-in groove 403 is correspondingly provided on two opposite surfaces of the plug-in portion 411, and the female plug 42 is provided with a plug-in connection groove 4201 corresponding to the plug-in portion 411, and the plug-in connection groove 4201 is provided with a plug-in protrusion 421 used in conjunction with the plug-in groove 403 on two opposite groove walls; when the male plug 41 is plug-connected with the female plug 42, the plug-in protrusion 421 is clamped in the plug-in groove 403. In this embodiment, through the plug-in connection, the assembly between two adjacent heating films 3 can be quickly realized, and the assembly efficiency is improved. Moreover, the provision of the plug-in protrusion 421 and the plug-in groove 403 further improves the stability of the plug-in connection.

[0052] Optionally, an aerogel film layer 402 is provided on the wall of the heat insulation groove, and when the male plug 41 is plugged into the female plug 42, the plugging protrusion 421 is inserted into the plugging groove 403, and the plugging protrusion 421 abuts against the aerogel film layer 402. The aerogel film layer 402 has a buffering effect on one hand, and can also well increase the friction force on the plugging protrusion 421 on the other hand, making the plug connection more reliable and stable.

[0053] Optionally, heating films 3 are provided on two opposite sides of the battery cell group 1 to better heat the battery cell group 1 and make the overall temperature uniformity of the battery cell group 1 better.

[0054] Optionally, the connecting portion 31 is provided with a clamping portion clamped with the insulating tray 2. The clamping portion is directly clamped with the insulating tray 2, and the fixed connection between the connecting portion 31 and the insulating tray 2 can be completed without additionally providing other connecting parts.

[0055] Embodiment 2

[0056] This embodiment discloses an electrical device, including the battery module as described in the first embodiment.

[0057] Batteries are used to power electrical devices, such as cars, cell phones, portable devices, laptops, ships, spacecraft, medical equipment, electric toys and power tools, etc.

[0058] Among them, automobiles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.; medical equipment can be various types of testing equipment; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.

[0059] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A battery module, characterized in that: include: A battery cell group (1), wherein an insulating tray (2) is arranged on the top of the battery cell group (1); The heating film (3) comprises a connecting portion (31) detachably connected to the insulating tray (2) and a heating portion (32) for being adhered to the side of the battery cell group (1), wherein the connecting portion (31) and the heating portion (32) are connected at an angle.

2. The battery module according to claim 1, characterized in that: A first bending fold (301) is provided between the connecting portion (31) and the heating portion (32), and the connecting portion (31) and the heating portion (32) can be bent relative to each other around the first bending fold (301).

3. The battery module according to claim 1, characterized in that: The connecting portion (31) is provided with a connecting hole (311), and the insulating tray (2) is provided with a pressing piece extending into the connecting hole (311) and connected to the insulating tray (2).

4. The battery module according to claim 1, characterized in that: A high temperature resistant adhesive layer (321) is provided on a surface of the heating portion (32) on one side facing the connecting portion (31), and the heating portion (32) is adhered to a side surface of the battery cell group (1) via the high temperature resistant adhesive layer (321).

5. The battery module according to claim 1, characterized in that: At least two heating films are arranged on the same side of the battery cell group (1), a male plug (41) is arranged on one heating film (3), and a female plug (42) used in conjunction with the male plug (41) is arranged on an adjacent heating film (3); The male plug (41) is plug-connected with the female plug (42) so that two adjacent heating films (3) are connected to each other.

6. The battery module according to claim 5, characterized in that: The male plug (41) is provided with a plug-in portion (411) protrudingly, and plug-in grooves (403) are correspondingly provided on two opposite surfaces of the plug-in portion (411); the female plug (42) is provided with a plug-in connection groove (4201) concavely corresponding to the plug-in portion (411), and plug-in protrusions (421) used in conjunction with the plug-in groove (403) are provided on two opposite groove walls of the plug-in connection groove (4201); When the male plug (41) is plugged and connected with the female plug (42), the plugging protrusion (421) is locked in the plugging groove (403).

7. The battery module according to claim 6, characterized in that: A heat-insulating groove (401) is provided in the plug-in portion (), and an aerogel film layer (402) is provided on the groove wall of the heat-insulating groove (401).

8. The battery module according to claim 1, characterized in that: The heating film (3) is provided on two opposite side surfaces of the battery cell group (1).

9. The battery module according to claim 1, characterized in that: The connecting portion (31) is provided with a clamping portion for clamping with the insulating tray (2).

10. An electrical device, characterized in that: The invention comprises a battery module as claimed in any one of claims 1 to 9.

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