Battery pack and electric equipment

Abstract

The utility model relates to a battery pack and electric equipment, the battery pack comprises a battery cell module and a first heating film, and the battery cell module is provided with a peripheral side; the first heating film is annularly arranged, the first heating film surrounds the peripheral side of the battery cell module, and the first heating film is used for heating the battery cell module. The first heating film is annularly arranged and surrounds the peripheral side of the battery cell module, so that the battery cell module is uniformly heated, and the heating and heat preservation effects are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery energy storage, and in particular to a battery pack and an electric device. BACKGROUND

[0002] In electric vehicles, energy storage systems and other applications relying on energy storage batteries, the working temperature of the battery cell module has a significant impact on its performance and life. In a low temperature environment, the activity of the battery cell module is reduced, and the charging and discharging efficiency, battery life, etc. will be negatively affected. Therefore, the battery cell module needs to be heated to ensure its normal working performance. However, in the related art, the battery cell module is unevenly heated, and the heating and insulation effect is poor. CONTENT OF THE UTILITY MODEL

[0003] The embodiments of the present application provide a battery pack and an electric device, which realize uniform heating of the battery cell module and improve the heating and insulation effect, to at least partially solve the above technical problems.

[0004] In order to achieve the above purpose, according to the first aspect of the present application, a battery pack is provided, comprising:

[0005] a battery cell module, the battery cell module has an outer peripheral side; and

[0006] a first heating film, which is arranged in a ring shape and surrounds the outer peripheral side of the battery cell module, the first heating film being used for heating the battery cell module.

[0007] Optionally, the first heating film surrounds the battery cell module in the direction of the outer peripheral side of the battery cell module, and the proportion of the size of the first heating film in the height direction of the battery cell module to the height of the battery cell module is between 80% and 100%.

[0008] Optionally, the first heating film and the battery cell module are bonded.

[0009] Optionally, the battery pack further comprises a clamping structure, the clamping structure surrounds the outside of the first heating film.

[0010] Optionally, the clamping structure comprises two end plates and a ring clamp, the two end plates are oppositely and spacedly arranged, and the battery cell module and the first heating film are arranged between the two end plates.

[0011] The first heating film comprises two first parts adjacent to and oppositely arranged with the end plates, and two second parts connected between the two first parts and oppositely arranged.

[0012] The ring clamp is arranged outside the two end plates and the two second parts.

[0013] Optionally, the first heating film and the two end plates are bonded.

[0014] Optionally, the battery pack further comprises a first side and a second side arranged oppositely, the outer peripheral side is arranged between the first side and the second side, and the battery pack further comprises a second heating film arranged on the second side of the battery cell module.

[0015] Optionally, the battery pack further comprises a heat-conducting structural adhesive arranged between the second heating film and the second side of the battery cell module.

[0016] Optionally, the battery pack further comprises a heat exchange plate arranged on a side of the second heating film away from the battery cell module.

[0017] According to a second aspect of the present application, a power consumption device is provided, comprising the battery pack according to any one of the above.

[0018] In the battery pack of the embodiments of the present application, the first heating film is arranged in a ring shape and surrounds the outer peripheral side of the battery cell module, and the first heating film simultaneously transmits heat from all around the battery cell module. This arrangement is different from the single-side or local heating mode, and can ensure that heat is uniformly transmitted to all parts of the battery cell module, effectively solving the problem of uneven heating in the related art and achieving uniform heating of the battery cell module. Since the first heating film surrounds the outer peripheral side of the battery cell module and heat is transmitted from multiple directions, compared with the mode of transmitting heat from only one side, the multi-directional heat transmission can accelerate the heating speed, thereby effectively improving the heating effect. After the ring-shaped first heating film is heated, a stable heat maintaining structure can be formed on the outer peripheral side of the battery cell module. This structure helps to reduce heat loss and improve the heat preservation effect, thereby ensuring the normal working performance of the battery cell module in a low temperature environment. That is, by arranging the first heating film in a ring shape and surrounding the outer peripheral side of the battery cell module, uniform heating of the battery cell module is achieved, and the heating and heat preservation effects are improved.

[0019] Other features and advantages of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0021] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0022] Figure 1 is a structural schematic view of the battery pack of the present disclosure, the first heating film and the hoop structure;

[0023] Figure 2 is an exploded schematic view of the battery pack of the present disclosure, the first heating film and the hoop structure; Figure 1

[0024] Figure 3 is a structural schematic view of the battery pack of the present disclosure from one perspective;

[0025] Figure 4 is an exploded schematic view of the battery pack of the present disclosure; Figure 3

[0026] Figure 5 is a structural schematic view of the battery pack of the present disclosure from another perspective. Figure 3 BRIEF DESCRIPTION OF DRAWINGS

[0027] 100, battery pack; 1, battery cell module; 11, outer peripheral side; 12, first side; 13, second side; 2, first heating film; 21, first part; 22, second part; 3, hoop structure; 31, end plate; 311, plate body; 312, reinforcing rib; 32, ring hoop; 4, second heating film; 5, heat-conducting structural adhesive; 6, heat exchange plate; 61, liquid inlet; 62, liquid outlet; 7, cover plate; 8, side plate.

[0028] DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0030] The present application provides a battery pack, please refer to Figure 1 and Figure 2 , Figures 1 to 5 is a structural schematic view of the battery pack provided by the embodiments of the present application.

[0031] The battery pack 100 comprises a battery cell module 1 and a first heating film 2.

[0032] The battery cell module 1 has an outer peripheral side 11, and the battery cell module 1 is the core component of the battery pack 100, responsible for storing and releasing electric energy, and the outer peripheral side 11 refers to the surface of the four sides of the battery cell module 1, which is the part to be covered by the first heating film 2.

[0033] ​​​The first heating film 2 is annularly arranged and surrounds the outer circumferential side 11 of the battery cell module 1, and is used to heat the battery cell module 1. The annular design enables the first heating film 2 to surround the battery cell module 1, forming a closed heating and heat preservation structure.

[0034] In the technical solution of the present application, the first heating film 2 is annularly arranged and surrounds the outer circumferential side 11 of the battery cell module 1, and simultaneously transmits heat from all around the battery cell module 1. This arrangement is different from the single-sided or local heating mode, and can ensure that heat is uniformly transmitted to each part of the battery cell module 1, effectively solving the problem of uneven heating in the related art, and achieving uniform heating of the battery cell module 1. Since the first heating film 2 surrounds the outer circumferential side 11 of the battery cell module 1, heat is transmitted inward from multiple directions. Compared with the mode of transmitting heat from only one side, this multi-directional heat transmission can accelerate the heating speed, thereby effectively improving the heating effect. After the annularly arranged first heating film 2 is heated, a stable heat preservation structure can be formed on the outer circumferential side 11 of the battery cell module 1. This structure helps to reduce heat loss and improve heat preservation effect, thereby ensuring the normal working performance of the battery cell module 1 in a low temperature environment. That is, by annularly arranging the first heating film 2 and surrounding the outer circumferential side 11 of the battery cell module 1, uniform heating of the battery cell module 1 is achieved, and the heating and heat preservation effect is improved.

[0035] It can be understood that the thickness of the first heating film 2 can be adjusted according to different application requirements and design requirements. For example, when the first heating film 2 is a polyester electric heating film (PET electric heating film), its thickness can range from 0.2 mm to 0.5 mm; and when the first heating film 2 is a polyimide electric heating film (PI heating film), its thickness can vary between 0.15 mm and 0.7 mm. Specifically, if a PI heating film is selected as the first heating film 2 and its thickness is set to 0.35 mm, the excellent properties of polyimide (PI) material can be utilized. Polyimide is a high-performance engineering plastic known for its excellent heat resistance, mechanical strength, electrical insulation performance, and chemical stability. The PI heating film made of this material not only inherits these advantages, but also has good heating performance. It can maintain stability in a wide temperature range of -200°C to +400°C, showing excellent temperature resistance. In addition, the PI heating film has excellent electrical insulation performance, making the heating process safer and more reliable. Its high strength means that it can maintain high tensile strength and elastic modulus even under extreme conditions. At the same time, the PI heating film exhibits good dimensional stability and is less likely to deform under temperature fluctuations, thereby providing stable coverage to the battery cell module 1 and ensuring uniform and effective heating. In particular, the PI heating film is light, thin, and flexible, making it easy to process into various shapes, and is very suitable for making a ring structure around the outer periphery of the battery cell module 1 to better adapt to the specific shape and size of the battery cell module 1. Using a thinner specification of the first heating film 2 also helps to reduce the occupied space, thereby improving the energy density of the entire battery pack 100.

[0036] In some embodiments, the first heating film 2 wraps around the outer periphery side 11 of the battery cell module 1, and the proportion of the size of the first heating film 2 in the height direction of the battery cell module 1 (i.e., from the first side 12 to the second side 13) to the height of the battery cell module 1 is between 80% and 100%. In these embodiments, the first heating film 2 covers 80% to 100% in the height direction of the battery cell module 1, which can ensure that most or even all of the height of the battery cell module 1 is effectively heated, and the first heating film 2 covers the outer periphery side 11 of the battery cell module 1 more comprehensively, reducing the temperature gradient in the height direction, which helps to achieve more uniform temperature distribution and further ensures uniform heating of the battery cell module 1, improving heating and insulation effect.

[0037] It can be understood that when the proportion of the size of the first heating film 2 in the height direction of the battery cell module 1 to the height of the battery cell module 1 is less than 100%, the first heating film 2 is centrally arranged in the height direction of the battery cell module 1, so that the first heating film 2 can uniformly transfer heat to both sides (i.e., the first side 12 and the second side 13) in the height direction of the battery cell module 1, further ensuring uniform heating of the battery cell module 1 and improving the heating and insulation effect.

[0038] In some embodiments, the first heating film 2 and the battery cell module 1 are bonded. In these embodiments, the bonding between the first heating film 2 and the battery cell module 1 can increase the bonding force between the components, reduce air gaps, improve heat conduction efficiency, increase the overall compactness, improve the heating and insulation effect, and also help to improve the energy density of the battery pack 100.

[0039] In some embodiments, continuing to refer to Figure 1 and Figure 2 , the battery pack 100 further comprises a clamping structure 3 surrounding the first heating film 2. In these embodiments, the clamping structure 3 surrounding the first heating film 2 can effectively fix the first heating film 2 and the battery cell module 1, ensure their close contact, and prevent movement or loosening, thereby improving the stability and reliability of the overall structure and ensuring the consistency of the heating effect.

[0040] The number of battery cell modules 1 is not specifically limited in this application. In some embodiments, the battery cell module 1 is provided with a plurality of (e.g., four as shown in Figure 4 , and correspondingly, the first heating film 2 is also provided with a plurality of (e.g., four as shown in Figure 4 , and the clamping structure 3 is also provided with a plurality of (e.g., four as shown in Figure 4 , and each battery cell module 1 is provided with one first heating film 2 on the outer circumferential side 11, and each first heating film 2 is surrounded by one clamping structure 3, thereby forming a modular arrangement. The modular design allows the battery pack 100 to flexibly configure the number of battery cell modules 1 according to actual needs. Whether it is a small energy storage system or a large electric vehicle battery pack, the total capacity can be adjusted by increasing or decreasing the battery cell modules 1. Each battery cell module 1 is equipped with an independent first heating film 2 and a clamping structure 3, ensuring that each battery cell module 1 can be uniformly heated and insulated, which helps to avoid local overheating or cold areas, and can ensure that each battery cell module 1 can maintain the best working temperature, improving the thermal management effect of the entire battery pack 100. The modular design simplifies the assembly process, and each battery cell module 1 and its related components can be installed and tested separately. If a certain battery cell module 1 fails, only the module needs to be replaced, without the need to disassemble the entire battery pack 100, simplifying assembly and maintenance.

[0041] The specific structure of the clamping structure 3 is not limited in the present application. For example, one or more belts are wrapped around the battery cell module 1 and the first heating film 2 to form a belt clamping structure 3. For another example, a frame made of metal or high-strength plastic is used to fix the battery cell module 1 and the first heating film 2 inside the frame to form a frame clamping structure 3.

[0042] In some embodiments, as shown in Figure 1 and Figure 2 , the clamping structure 3 includes two end plates 31 and a ring 32. The two end plates 31 are oppositely and spacedly arranged, and the battery cell module 1 and the first heating film 2 are arranged between the two end plates 31. The first heating film 2 includes two first parts 21 adjacent to and oppositely arranged with the end plates 31, and two second parts 22 connected between the two first parts 21 and oppositely arranged. The ring 32 is clamped outside the two end plates 31 and the two second parts 22. In these embodiments, the design of the two end plates 31 and the ring 32 can provide uniform pressure distribution, ensuring that the battery cell module 1 and the first heating film 2 are subjected to relatively consistent pressure in the entire height direction. Such uniform pressure helps to improve heat conduction efficiency and reduce local overheating or cold areas caused by uneven pressure. The combination of the end plates 31 and the ring 32 provides strong mechanical support, enhancing the structural stability of the entire battery pack 100. This design can withstand external impact and vibration, reducing the risk of damage during transportation and use. Through the combination of the end plates 31 and the ring 32, the battery cell module 1 and the first heating film 2 can be conveniently fixed during assembly, and if necessary, maintenance or replacement of components can also be relatively easily disassembled, which improves production efficiency and maintenance convenience. By adjusting the distance between the two end plates 31 and the size of the ring 32, the battery cell module 1 of different heights and widths can be adapted, which is more flexible. It can be understood that, according to needs, the ring 32 can be provided with multiple (such as Figure 1 two as shown in the schematic diagram) and the multiple rings 32 are spacedly arranged in the height direction of the battery cell module 1. By arranging multiple rings 32 at different height positions of the battery cell module 1, the structural stability of the entire assembly can be enhanced.

[0043] In some embodiments, as shown in Figure 2 , each end plate 31 includes a plate body 311 adjacent to one first part 21 and a reinforcing rib 312 arranged on the side of the plate body 311 away from the first heating film 2. In these embodiments, the reinforcing rib 312 is arranged on the side of the plate body 311 of the end plate 31 away from the first heating film 2, which can improve the structural strength of the end plate 31, so that the end plate 31 can withstand greater pressure when clamping the first heating film 2, thereby further ensuring the stability of the clamping structure 3.

[0044] In some embodiments, the first heating film 2 is bonded between the two end plates 31. In these embodiments, the bonding mode further enhances the connection between the first heating film 2 and the end plates 31, ensures the reliable fixation of the first heating film 2 during use, and improves the stability of the overall structure.

[0045] In some embodiments, as shown in Figure 2 and Figure 4 , the battery pack 100 further includes a first side 12 and a second side 13 opposite to each other, and the outer peripheral side 11 is arranged between the first side 12 and the second side 13. The battery pack 100 further includes a second heating film 4, which is arranged on the second side 13 of the battery cell module 1. In these embodiments, the second heating film 4 is added to provide heat on the second side 13 of the battery cell module 1, so that the temperature of the entire battery cell module 1 is more uniform, and the heating effect of the battery cell module 1 is further improved.

[0046] It can be understood that the thickness of the second heating film 4 can be different specifications to adapt to different application requirements and design requirements. For example, the second heating film 4 is a polyester heating film (PET heating film), and the thickness range can be from 0.2mm to 0.5mm. For another example, the second heating film 4 is a polyimide heating film (PI heating film), and the thickness range can be from 0.15mm to 0.7mm. Specifically, the second heating film 4 is a PI heating film with a thickness of 1mm. The thinner second heating film 4 can reduce the space occupation and improve the energy density of the battery pack 100.

[0047] In some embodiments, as shown in Figure 4 , the battery pack 100 further includes a heat-conducting structural adhesive 5 arranged between the second heating film 4 and the second side 13 of the battery cell module 1. In these embodiments, the heat-conducting structural adhesive 5 enhances the heat conduction between the second heating film 4 and the battery cell module 1, improves the heating efficiency, and at the same time provides a good mechanical fixation effect.

[0048] In some embodiments, as shown in Figure 4 , the battery pack 100 further includes a heat exchange plate 6 arranged on the side of the second heating film 4 away from the battery cell module 1. In these embodiments, when the battery cell module 1 needs to be cooled, the heat exchange plate 6 can provide cold energy, which is conducted to the battery cell module 1 through the second heating film 4 to cool the battery cell module 1. When the battery cell module 1 needs to be heated, the heat exchange plate 6 can provide heat, which is conducted to the battery cell module 1 through the second heating film 4 to heat the battery cell module 1. That is, when the battery cell module 1 needs to be cooled, the heat exchange plate 6 cools it. When the battery cell module 1 needs to be heated, the heat exchange plate 6 can assist the first heating film 2 and the second heating film 4 to heat the battery cell module 1, thereby meeting the temperature adjustment requirements of the battery cell module 1 in more scenarios.

[0049] In some embodiments, the heat exchange plate 6 is provided with a heat exchange cavity for passing in heat exchange liquid. In these embodiments, the heat exchange cavity can realize the dual functions of cooling and heating by passing in liquid at different temperatures. This multifunctionality enables the battery pack 100 to adapt to a wider range of working environments, whether in low-temperature or high-temperature conditions. Specifically, see Figure 5 The heat exchange plate 6 is provided with an inlet 61 and an outlet 62, the inlet 61 being in communication with the heat exchange cavity, and the outlet 62 being in communication with the heat exchange cavity. In this way, heat exchange liquid at the temperature required for heat exchange enters the heat exchange cavity from the inlet 61, and after heat exchange, the heat exchange liquid at a changed temperature flows out of the outlet 62. After external cooling or heating treatment, the heat exchange liquid again meets the temperature required for heat exchange, and again enters the heat exchange cavity from the inlet 61, to restart the heat exchange cycle.

[0050] In some embodiments, the heat exchange plate 6 and the second heating film 4 are bonded. In these embodiments, the bonding between the heat exchange plate 6 and the second heating film 4 can increase the bonding force between the components, reduce air gaps, and improve heat conduction efficiency. Since the heat exchange plate 6 and the second heating film 4 are bonded, the second heating film 4 is bonded to the battery cell module 1 through the heat conduction structure adhesive 5, thereby realizing structural and heat conduction connections between the battery cell module 1 and the heat exchange plate 6. This not only helps to improve the thermal management efficiency of the battery cell module 1, but also helps to fix the battery cell module 1 and improve the stability of the battery cell module 1.

[0051] In some embodiments, see Figure 3 , Figure 4 and Figure 5 The battery pack 100 further includes a cover plate 7 and a side plate 8, and the cover plate 7, the side plate 8, and the heat exchange plate 6 together define a containing cavity for containing the battery cell module 1 (of course, the first heating film 2, the clamping structure 3, the heat conduction structure adhesive 5, and the second heating film 4 are also arranged in the containing cavity). In these embodiments, the cover plate 7, the side plate 8, and the heat exchange plate 6 together define a containing cavity for containing the battery cell module 1, i.e., the cover plate 7, the side plate 8, and the heat exchange plate 6 form a housing of the battery pack 100. In this way, integrating the heat exchange plate 6 into the housing of the battery pack 100 can improve space utilization, enhance thermal management efficiency, and simplify the overall structure, thereby improving the performance and reliability of the battery pack 100.

[0052] According to a second aspect of the present application, a power consuming device is provided, which includes the battery pack 100, and the structure of the battery pack 100 is as described above. Since the power consuming device adopts all the technical solutions of the above embodiments, it at least has the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. The type of the power consuming device is not specifically limited in the present application, and the power consuming device includes but is not limited to automobiles, ships, household appliances, and industrial equipment.

[0053] In the description of the application, the terms "first", "second", etc. are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0054] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0055] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0056] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiment in accordance with the technical essence of the present application without departing from the technical solution content of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A battery pack, characterized in that, include: A battery cell module, the battery cell module having an outer peripheral side; and, A first heating film is arranged in a ring shape and surrounds the outer periphery of the battery cell module. The first heating film is used to heat the battery cell module.

2. The battery pack according to claim 1, characterized in that, The first heating film surrounds the outer periphery of the battery cell module, and the ratio of the size of the first heating film in the height direction of the battery cell module to the height of the battery cell module is between 80% and 100%.

3. The battery pack according to claim 1, characterized in that, The first heating film and the battery cell module are bonded together.

4. The battery pack according to claim 1, characterized in that, The battery pack also includes a clamping structure that surrounds the first heating film.

5. The battery pack according to claim 4, characterized in that, The clamping structure includes two end plates and a ring clamp. The two end plates are opposite to each other and spaced apart. The battery cell module and the first heating film are disposed between the two end plates. The first heating film includes two first parts adjacent to and opposite to the end plate, and two second parts connected between the two first parts and opposite to each other; The ring clamp is provided on the two end plates and the two second parts.

6. The battery pack according to claim 5, characterized in that, The first heating film is bonded to the two end plates.

7. The battery pack according to any one of claims 1 to 6, characterized in that, The battery cell module also includes a first side and a second side disposed opposite to each other, the outer peripheral side being disposed between the first side and the second side, and the battery pack also includes a second heating film disposed on the second side of the battery cell module.

8. The battery pack according to claim 7, characterized in that, The battery pack also includes a thermally conductive structural adhesive, which is disposed between the second heating film and the second side of the cell module.

9. The battery pack according to claim 7, characterized in that, The battery pack also includes a heat exchange plate, which is disposed on the side of the second heating film away from the cell module.

10. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1 to 9.

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