Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, the battery pack comprises at least two battery modules, a plurality of single batteries are connected in parallel in each battery module, and the adjacent battery modules are connected in series; and the insulating films are arranged between the adjacent battery modules. According to the battery pack disclosed by the utility model, the plurality of single batteries in the battery modules are arranged in parallel, so that the single batteries in the battery modules do not need to be provided with insulating films, the battery pack can generate high voltage by connecting the plurality of battery modules in series, and the insulating films are arranged between the adjacent battery modules to realize insulation so as to protect the battery pack; meanwhile, the use amount of the insulating film can be reduced by arranging the insulating film, so that the weight and the production cost of the battery pack are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack parts, in particular to a battery pack and an electric device. Background Art

[0002] In the related art, a battery pack is usually composed of multiple battery modules connected in series, and multiple battery cells are connected in parallel in the battery module. In order to ensure the safety of the battery pack, each battery cell is usually coated with an insulating film, which results in a large amount of insulating film used, which increases the weight of the battery pack and the production cost of the battery pack. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery pack, wherein the insulating film in the battery pack is only arranged between adjacent battery modules, thereby reducing the use of the insulating film, thereby reducing the weight and production cost of the battery pack.

[0004] The battery pack according to the embodiment of the utility model comprises: at least two battery modules, each of which has a plurality of battery cells connected in parallel, and adjacent battery modules are arranged in series; and an insulating film, which is arranged between adjacent battery modules.

[0005] According to the battery pack of the embodiment of the utility model, the multiple battery cells in the battery module are arranged in parallel, so that the battery cells in the battery module do not need to be provided with an insulating film, and the multiple battery modules are connected in series to enable the battery pack to generate high voltage. In this way, an insulating film is provided between adjacent battery modules to achieve insulation to protect the battery pack. At the same time, the provision of the insulating film in this way can reduce the use of the insulating film, thereby reducing the weight and production cost of the battery pack.

[0006] According to the battery pack of some embodiments of the utility model, the insulating film includes a plurality of sub-insulating films, and when the insulating film is arranged on two adjacent battery modules, there is a first state of unfinished assembly and a second state of completed assembly, in the first state, the plurality of sub-insulating films are connected as one, and in the second state, the adjacent sub-insulating films are disconnected under the pressure of the battery cells.

[0007] According to the battery pack of some embodiments of the present invention, the battery cells are constructed as cylindrical batteries, and the multiple battery cells in each battery module are arranged in rows along the first direction and staggered along the second direction. The insulating film is arranged between adjacent battery modules in the second direction, so that the battery cells are suitable for applying pressure to disconnect the connection between adjacent sub-insulating films in the second direction.

[0008] According to the battery pack of some embodiments of the present invention, there is an opening between adjacent sub-insulating films, and in a first direction, an intersection line between two adjacent battery cells is directly opposite to the opening.

[0009] According to the battery pack of some embodiments of the present invention, both ends of the opening are provided with collapse openings, and the collapse openings are suitable for breaking when squeezed.

[0010] According to the battery pack of some embodiments of the present invention, there is a slit between adjacent sub-insulating films, and in the first direction, the intersection line of two adjacent battery cells is directly opposite to the slit.

[0011] According to the battery pack of some embodiments of the present invention, the battery module further comprises: a template support, and both sides of the template support are suitable for arranging the battery cells.

[0012] According to the battery pack of some embodiments of the present invention, the battery module further includes: a heat exchange plate, the heat exchange plate is integrated with the template support, and the battery cell abuts against the heat exchange plate.

[0013] According to the battery pack of some embodiments of the present invention, the insulating film is constructed as a polymer film.

[0014] The utility model also provides an electricity-consuming device.

[0015] According to some embodiments of the present invention, the electric device comprises the battery pack described in any one of the above embodiments.

[0016] The advantages of the power-consuming device and the above-mentioned battery pack compared with the prior art are the same, which will not be repeated here.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 Schematic diagram of a battery pack according to some embodiments of the present invention;

[0020] Figure 2 for Figure 1 An exploded view of the battery pack in Figure 1;

[0021] Figure 3 Schematic diagram of an unfinished assembly of a battery pack according to some embodiments of the present invention;

[0022] Figure 4 for Figure 3 A schematic diagram of another perspective of the battery pack;

[0023] Figure 5 for Figure 1 A schematic diagram of another perspective of the battery pack;

[0024] Figure 6 Schematic diagram of an insulating film provided with openings in some embodiments of the utility model;

[0025] Figure 7 A schematic diagram of an insulating film provided with slits in some embodiments of the utility model;

[0026] Figure 8 Schematic diagram of electrical devices according to some embodiments of the present invention.

[0027] Reference numerals:

[0028] Electrical device 1000;

[0029] Battery pack 100;

[0030] Battery module 10, battery cell 11, template support 12;

[0031] Insulating film 20 , sub-insulating film 21 , opening 22 , collapsed opening 23 , slit 24 . DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0034] Reference below Figure 1-Figure 7 A battery pack 100 according to an embodiment of the present invention is described.

[0035] like Figure 1-Figure 7 As shown, the battery pack 100 according to the embodiment of the present invention includes: at least two battery modules 10 and an insulating film 20 .

[0036] A plurality of battery cells 11 are connected in parallel in each battery module 10 , and adjacent battery modules 10 are arranged in series. An insulating film 20 is arranged between adjacent battery modules 10 .

[0037] It should be noted that multiple battery cells 11 are connected in parallel and arranged in the battery module 10, so that the electric potentials of the battery cells 11 in the battery module 10 are equal, so that the battery cells 11 in a single battery module 10 do not need to be insulated, and the two battery modules 10 are connected in series, so an insulating film 20 needs to be arranged between the two battery modules 10 to ensure the safety of the battery pack 100.

[0038] For example, when two battery modules 10 are provided in the battery pack 100, a plurality of battery cells 11 are connected in parallel in a single battery module 10, so that the energy in the single battery module 10 is higher. At the same time, the battery cells 11 in the single battery module 10 are all arranged in parallel, so that the potentials of the plurality of battery cells 11 are equal. In this way, the plurality of battery cells 11 in the single battery module 10 do not need to be insulated, and the two battery modules 10 connected in series can enable the battery pack 100 to output a higher voltage. When the two battery modules 10 are connected in series, there is a potential difference between the two battery modules 10. Therefore, the two battery modules 10 need to be insulated when connected in series to ensure the safety of the battery pack 100. In this way, by setting the insulating film 20 between the two battery modules 10, the use of the insulating film 20 can be reduced while achieving insulation, thereby reducing the weight and production cost of the battery pack 100.

[0039] Therefore, by setting the insulating film 20 between adjacent battery modules 10, the battery cells 11 in the battery module 10 do not need to be covered with the insulating film 20, thereby reducing the use of the insulating film 20 and thus reducing the weight of the battery pack 100, while also reducing the production cost of the battery pack 100.

[0040] According to the battery pack 100 of the embodiment of the utility model, the multiple battery cells 11 in the battery module 10 are arranged in parallel, so that the battery cells 11 in the battery module 10 do not need to be provided with an insulating film 20, and the multiple battery modules 10 are connected in series to enable the battery pack 100 to generate high voltage. In this way, the insulating film 20 is provided between adjacent battery modules 10 to achieve insulation to protect the battery pack 100. At the same time, the provision of the insulating film 20 in this way can reduce the usage of the insulating film 20, thereby reducing the weight and production cost of the battery pack 100.

[0041] In some embodiments, Figure 1-Figure 5As shown, the insulating film 20 includes a plurality of sub-insulating films 21. When the insulating film 20 is arranged on two adjacent battery modules 10, there is a first state of unfinished assembly and a second state of completed assembly. In the first state, the plurality of sub-insulating films 21 are connected as a whole. In the second state, the adjacent sub-insulating films 21 are disconnected under the pressure of the battery cell 11.

[0042] It should be noted that when the insulating film 20 is in the first state and two adjacent battery modules 10 are not fully assembled, a plurality of sub-insulating films 21 are connected together to form the insulating film 20, which makes it more convenient to fit the insulating film 20 with the battery module 10, thereby reducing the difficulty of assembly. That is, when the insulating film 20 is assembled on the battery module 10, the two ends of the insulating film 20 are connected to the two ends of the battery module 10, and the middle area of ​​the insulating film 20 is only partially in contact with the battery cell 11 there, while the insulating film 20 is in the second state and two adjacent battery modules 10 are fully assembled. During assembly, that is, two adjacent battery modules 10 have been abutted against each other and connected in series, so that the insulating film 20 will be squeezed during the abutment of the two adjacent battery modules 10, so that the multiple sub-insulating films 21 are disconnected, so that the multiple sub-insulating films 21 will be respectively attached to the battery cells 11 of the battery module 10 to achieve insulation between the two adjacent battery modules 10, thereby achieving stable and reliable insulation. At the same time, the sub-insulating film 21 can make full use of the gap between the adjacent battery modules 10 to reduce space occupancy and increase the energy density of the battery pack 100.

[0043] Therefore, when the insulating film 20 is in the first state, the two adjacent battery modules 10 have not been assembled yet. At this time, it is easier for the insulating film 20 to be arranged between the adjacent battery modules 10. When the insulating film 20 is in the second state, the two adjacent battery modules 10 are assembled, and the sub-insulating film 21 of the insulating film 20 will be disconnected and attached to the battery cell 11, so that the insulating effect of the insulating film 20 is better.

[0044] In some embodiments, Figure 1-Figure 5 As shown, the battery cells 11 are constructed as cylindrical batteries, and the multiple battery cells 11 in each battery module 10 are arranged in rows along the first direction and staggered along the second direction. The insulating film 20 is arranged between adjacent battery modules 10 in the second direction, so that the battery cells 11 are suitable for applying pressure to disconnect the connection between adjacent sub-insulating films 21 in the second direction.

[0045] It should be noted that after the battery cells 11 are constructed as cylindrical batteries, multiple battery cells 11 can be arranged together without damaging the remaining batteries. After the multiple battery cells 11 are arranged in a row along the first direction, they will be arranged along the length direction of the battery module 10. At the same time, the multiple battery cells 11 will be staggered in the second direction, so that two groups of battery cells 11 arranged in a row along the first direction will be located in the gap formed by each other in the second direction, thereby making the volume of a single battery module 10 smaller, and then making the volume of the battery pack 100 composed of multiple battery modules 10 smaller. At the same time, when two adjacent battery modules 10 in the second direction are combined together, the battery cells 11 relative to the two battery modules 10 are also staggered. In this way, the insulating film 20 when assembled will be squeezed by the battery cells 11, so that the adjacent sub-insulating films 21 will be broken and adhered to the battery cells 11.

[0046] For example, when the insulating film 20 is in the first state, the insulating film 20 is tangent to the cylindrical battery. At this time, the insulating film 20 is easier to be set on the battery module 10. When the adjacent battery modules 10 are assembled, the battery module 10 will squeeze the insulating film 20 to break it, so that the insulating film 20 is in the second state. At this time, multiple sub-insulating films 21 will respectively fit with a battery cell 11 in the battery module 10 to achieve insulation of the adjacent battery modules 10.

[0047] Therefore, after the battery cells 11 are constructed as cylindrical batteries, it can be easier to arrange them in the battery module 10. At the same time, after multiple battery cells 11 are arranged in a row along the first direction, they will be staggered in the second direction, so that the battery cells 11 in different rows are in their respective gaps when they are abutted. At the same time, adjacent battery modules 10 are also staggered when they are abutted. In this way, after the adjacent battery modules 10 are abutted, they will squeeze the insulating film 20 and disconnect the connection between adjacent sub-insulating films 21.

[0048] In some embodiments, Figure 6 As shown, there is an opening 22 between adjacent sub-insulating films 21 , and in the first direction, the intersection line of two adjacent battery cells 11 is directly opposite to the opening 22 .

[0049] It should be noted that after the adjacent sub-insulating films 21 form openings 22, the insulating film 20 can be disconnected more quickly when squeezed by the battery cell 11, and the openings 22 are directly opposite to the intersection line of two adjacent battery cells 11, so that the disconnected sub-insulating film 21 can cover the battery cell 11.

[0050] Thus, the openings 22 between adjacent sub-insulating films 21 are directly opposite to the intersection lines of two adjacent battery cells 11 , so that the sub-insulating films 21 that are squeezed and broken can cover the battery cells 11 to achieve insulation.

[0051] In some embodiments, Figure 6 As shown, both ends of the opening 22 are provided with collapse openings 23, and the collapse openings 23 are suitable for breaking when being squeezed.

[0052] It should be noted that, the two ends of the opening 22 are provided with collapse openings 23, and the collapse openings 23 are distributed along the length direction of the opening 22, that is, the adjacent sub-insulating films 21 are connected together through the collapse openings 23, so that the collapse openings 23 are easy to break after the insulating film 20 is squeezed, so that the insulating film 20 can be changed into multiple sub-insulating films 21, and the collapse openings 23 are located at both ends of the opening 22, so that the shapes and sizes of the multiple sub-insulating films 21 formed after the insulating film 20 is broken are roughly equal, so that the sub-insulating films 21 can completely cover the battery cells 11 and can offset the parts of the battery cells 11 in two adjacent battery modules 10, thereby achieving a good insulation effect.

[0053] Therefore, by providing the collapse opening 23 , the insulation film 20 can be more controllable when broken, and it can also be ensured that the sub-insulation film 21 after breaking can have a good insulation effect, thereby ensuring that the battery pack 100 is safer when in use.

[0054] In some embodiments, Figure 7 As shown, there is a slit 24 between adjacent sub-insulating films 21 , and in the first direction, the intersection line of two adjacent battery cells 11 is directly opposite to the slit 24 .

[0055] It should be noted that the slits 24 formed between adjacent sub-insulating films 21 are distributed along the width direction of the insulating film 20, and the slits 24 form a gap at a certain distance, so that the slits 24 are easier to break when the insulating film 20 is squeezed, thereby forming multiple sub-insulating films 21. At the same time, the slits 24 are directly opposite to the intersection line of two adjacent battery cells 11, which ensures that the broken sub-insulating film 21 can cover the part of the battery cell 11 that is against each other, thereby achieving a good insulation effect.

[0056] Therefore, by forming a slit 24 between adjacent sub-edge films and the slit 24 being directly opposite to the intersection line of two adjacent battery cells 11, the insulating film 20 is easier to break after being squeezed and the sub-insulating film 21 formed by the rupture can completely cover the part of the battery cell 11 that is against each other, so that there is a good insulation effect between adjacent battery modules 10, thereby ensuring the safety of the battery pack 100.

[0057] In some embodiments, Figure 1-Figure 5 As shown, the battery module 10 further includes: a template support 12 , and both sides of the template support 12 are suitable for arranging the battery cells 11 .

[0058] It should be noted that both sides of the template bracket 12 can fix the battery cells 11, that is, a row of battery cells 11 arranged along the first direction are arranged on both sides of the template bracket 12, and at the same time, the template bracket 12 is formed with a bend at the position where the battery cells 11 are set, that is, the battery cells 11 fixed on both sides of the template bracket 12 are staggered in the second direction. In this way, the battery cells 11 in the battery module 10 can be distributed more compactly, thereby reducing the volume of the battery module 10, and then making the volume of the formed battery pack 100 smaller.

[0059] The battery cells 11 in the template support 12 are all connected in parallel, and the template support 12 will be connected to the parallel-connected battery cells 11 and connected in series with the template supports 12 of the remaining battery modules 10 so that the battery pack 100 can output the high voltage required by the composite.

[0060] Thus, the battery module 10 fixes the battery cells 11 through the template support 12 , and is also connected in series through the template support 12 to lead out the electrical energy in the battery cells 11 .

[0061] In some embodiments, the battery module 10 further includes a heat exchange plate, the heat exchange plate is integrated with the template support 12, and the battery cell 11 abuts against the heat exchange plate.

[0062] It should be noted that after the heat exchange plate is integrated into the template bracket 12, it can dissipate heat for the battery cell 11 more conveniently. At the same time, the battery cell 11 will directly abut against the heat exchange plate, so that the heat exchange plate directly exchanges heat for the battery cell 11, thereby shortening the heat exchange path and improving the heat exchange efficiency.

[0063] Thus, the heat exchange plate is integrated into the template support 12 and abuts against the battery cell 11 , which makes the heat exchange path between the heat exchange plate and the battery cell 11 shorter and improves the heat exchange efficiency of the heat exchange plate.

[0064] In some embodiments, the insulating film 20 is configured as a polymer film.

[0065] It should be noted that the insulating film 20 is constructed as a polymer film, such as polystyrene, polypropylene, polyester and other films, which can ensure that the insulating film 20 has good insulation properties. At the same time, the insulating film 20 is easier to open holes 22 or cut slits 24 during processing, thereby making the production efficiency of the insulating film 20 higher.

[0066] Thus, by configuring the insulating film 20 as a polymer thin film, the insulating film 20 can have good insulation properties and the insulating film 20 can be easily processed.

[0067] The utility model also provides an electrical device 1000 .

[0068] like Figure 8 As shown, the electric device 1000 according to the embodiment of the utility model includes the battery pack 100 of any one of the above embodiments.

[0069] According to the electrical equipment of the embodiment of the utility model, in the battery pack 100 therein, the multiple battery cells 11 in the battery module 10 are arranged in parallel, so that the battery cells 11 in the battery module 10 do not need to be provided with an insulating film 20, and the multiple battery modules 10 are connected in series to enable the battery pack 100 to generate high voltage. In this way, the insulating film 20 is provided between adjacent battery modules 10 to achieve insulation to protect the battery pack 100. At the same time, the provision of the insulating film 20 in this way can reduce the usage of the insulating film 20, thereby reducing the weight and production cost of the battery pack 100.

[0070] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0071] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0072] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0075] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack (100), characterized in that: include: At least two battery modules (10), each of the battery modules (10) having a plurality of battery cells (11) connected in parallel, and adjacent battery modules (10) being arranged in series; An insulating film (20) is provided between adjacent battery modules (10).

2. The battery pack (100) according to claim 1, characterized in that: The insulating film (20) comprises a plurality of sub-insulating films (21). When the insulating film (20) is arranged on two adjacent battery modules (10), there is a first state of unfinished assembly and a second state of completed assembly. In the first state, the plurality of sub-insulating films (21) are connected as a whole. In the second state, the adjacent sub-insulating films (21) are disconnected under the pressure of the battery cells (11).

3. The battery pack (100) according to claim 2, characterized in that: The battery cells (11) are constructed as cylindrical batteries. The plurality of battery cells (11) in each battery module (10) are arranged in a row along a first direction and staggered along a second direction. The insulating films (20) are arranged between adjacent battery modules (10) in the second direction so that the battery cells (11) are suitable for applying pressure in the second direction to disconnect the connection between adjacent sub-insulating films (21).

4. The battery pack (100) according to claim 2, characterized in that: An opening (22) is provided between adjacent sub-insulating films (21), and in a first direction, an intersection line between two adjacent battery cells (11) is directly opposite to the opening (22).

5. The battery pack (100) according to claim 4, characterized in that: Both ends of the opening (22) are provided with collapse openings (23), and the collapse openings (23) are suitable for breaking off when squeezed.

6. The battery pack (100) according to claim 2, characterized in that: There is a slit (24) between adjacent sub-insulating films (21), and in a first direction, the intersection line of two adjacent battery cells (11) is directly opposite to the slit (24).

7. The battery pack (100) according to claim 1, characterized in that: The battery module (10) further comprises: a template support (12), and two sides of the template support (12) are suitable for arranging the battery cells (11).

8. The battery pack (100) according to claim 7, characterized in that: The battery module (10) further comprises: a heat exchange plate, the heat exchange plate being integrated with the template support (12), and the battery cell (11) being in abutment with the heat exchange plate.

9. The battery pack (100) according to any one of claims 1 to 8, characterized in that: The insulating film (20) is constructed as a polymer film.

10. An electrical device (1000), characterized in that: A battery pack (100) comprising any one of claims 1 to 9.

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