Battery pack and vehicle

Abstract

The utility model discloses a kind of battery pack and vehicle, belong to battery technical field, the battery pack includes: box frame and at least one battery module, at least one battery installation space is formed in the box frame;At least one the battery module is installed in at least one the battery installation space one by one correspondingly;Wherein, the outer peripheral wall of the box frame is equipped with heat preservation structure, and first heat insulation structure is equipped between the battery module and the inner wall of the battery installation space.The battery pack of the utility model embodiment, first heat insulation structure is equipped between box frame and battery module for reducing the heat loss of battery module, while the heat preservation structure outside box frame can also insulate the influence of external cold environment to battery module, to improve the working performance of battery pack in low temperature environment.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack and a vehicle. Background Technology

[0002] Currently, the improvement in the low-temperature performance of battery packs is relatively limited, especially in northern regions during winter when temperatures remain below zero for extended periods. This limitation severely restricts the driving range of electric vehicle batteries.

[0003] While existing battery packs have some insulation structures, their insulation effect is limited in low-temperature environments, affecting the battery's performance at low temperatures, and there is room for improvement. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery pack in which a first heat insulation structure is provided between the battery pack's housing frame and the battery module to reduce heat loss from the battery module. At the same time, the heat insulation structure outside the housing frame can also isolate the battery module from the influence of the external cold environment, thereby improving the battery pack's performance in low-temperature environments.

[0005] A battery pack according to an embodiment of the present utility model includes: a housing frame and at least one battery module, wherein at least one battery mounting space is formed within the housing frame; at least one battery module is installed in at least one battery mounting space in a corresponding manner; wherein, the outer peripheral wall of the housing frame is provided with a heat insulation structure, and a first heat insulation structure is provided between the battery module and the inner wall of the battery mounting space.

[0006] According to the battery pack of this utility model embodiment, a first heat insulation structure is provided between the battery pack housing frame and the battery module to reduce heat loss from the battery module. At the same time, the heat insulation structure outside the housing frame can also isolate the external cold environment from the battery module, thereby improving the working performance of the battery pack in low-temperature environments.

[0007] According to an embodiment of the present invention, a heating film is provided at least partially between the battery module and the inner wall of the housing frame, and the heating film is located between the first heat insulation structure and the inner wall of the housing frame at the corresponding position.

[0008] According to the battery pack of this utility model embodiment, the heating film is integrated into the inner wall of the housing frame by hot pressing.

[0009] According to an embodiment of the present invention, the battery module includes a plurality of battery cells arranged along a first direction, and the heating film is located at both ends of the plurality of battery cells in a second direction and extends along the first direction.

[0010] According to an embodiment of the present utility model, the battery pack includes two longitudinal beams and multiple transverse beams, each transverse beam being connected between two longitudinal beams, and the first heat insulation structure is provided between the battery module and the transverse beams, as well as between the battery module and the longitudinal beams.

[0011] According to the battery pack of this utility model embodiment, two of the plurality of crossbeams are end beams and the other is an internal crossbeam. A distance is left between one of the end beams and the adjacent internal crossbeam to define an electronic control installation space between the end beam and the longitudinal beam. The electronic control installation space is used to install the battery management module. The other end beam and the other adjacent internal crossbeam are connected as one unit, and the two adjacent internal crossbeams and the longitudinal beam define the battery installation space.

[0012] According to the battery pack of this utility model embodiment, the cross sections of the two longitudinal beams and the two end beams are provided with hollow cavities, and the hollow cavities are filled with a second heat insulation structure.

[0013] According to the battery pack of this utility model embodiment, the thickness of the first heat insulation structure at the longitudinal beam is greater than the thickness at the inner cross beam.

[0014] The battery pack according to an embodiment of the present invention further includes a liquid cooling plate and a bottom support structure. The liquid cooling plate is connected to the bottom of the battery module, and a third heat insulation structure is provided between the bottom of the liquid cooling plate and the bottom support structure.

[0015] This utility model embodiment also proposes a vehicle including the aforementioned battery pack.

[0016] The advantages of the vehicle compared to existing technologies and the battery pack compared to existing technologies are the same, and will not be repeated here.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the battery pack structure according to an embodiment of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the battery pack without the battery module installed according to an embodiment of the present invention;

[0021] Figure 3 This is a partial top view of the battery pack according to an embodiment of the present invention;

[0022] Figure 4 This is a partial structural cross-sectional view of the battery pack according to an embodiment of the present utility model;

[0023] Figure 5 This is an exploded view of the battery pack according to an embodiment of the present invention.

[0024] Figure label:

[0025] Battery pack 100, housing frame 1, longitudinal beam 11, internal crossbeam 12, end beam 13, second heat insulation structure 14, heat preservation structure 15, battery installation space 161, electronic control installation space 162, first heat insulation structure 2, heating film 3, battery module 4, battery cell 41, liquid cooling plate 5, bottom support structure 6. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The following is for reference. Figures 1-5 According to an embodiment of the present utility model, a first heat insulation structure 2 is provided between the housing frame 1 and the battery module 4 of the battery pack 100 to reduce the heat loss of the battery module 4. At the same time, the heat insulation structure 15 outside the housing frame 1 can also isolate the external cold environment from the battery module 4, thereby improving the working performance of the battery pack 100 in low temperature environment.

[0030] like Figure 1-5 As shown, a battery pack 100 according to an embodiment of the present invention includes: a housing frame 1 and at least one battery module 4.

[0031] The housing frame 1 has at least one battery mounting space 161; at least one battery module 4 is installed in at least one battery mounting space 161; the outer peripheral wall of the housing frame 1 is provided with a heat insulation structure 15, and a first heat insulation structure 2 is provided between the battery module 4 and the inner wall of the battery mounting space 161.

[0032] In practice, the battery installation space 161 can be used to install the battery module 4. In this embodiment of the utility model, two battery installation spaces 161 can be set, and each battery installation space 161 is equipped with a battery module 4. A heat insulation structure 15 can be set on the outer peripheral wall of the housing frame 1. The outer peripheral wall can be understood as the part of the housing frame 1 that is in direct contact with the outside world. The heat insulation structure 15 can be heat insulation cotton. The heat insulation cotton of the battery pack 100 generally uses materials such as polyimide foam, polyolefin heat insulation cotton, and aluminum foil heat insulation cotton. For example, polyimide foam has a low thermal conductivity and lightweight characteristics, which can effectively slow down the cooling rate of the battery at low temperature and improve the performance of the battery in low temperature environment. At this time, when the battery module 4 works at low temperature, the influence of the external low temperature environment can be reduced.

[0033] In addition, a first heat insulation structure 2 is provided between the battery module 4 and the inner wall of the battery mounting space 161. For example, the first heat insulation structure 2 can be placed around the battery module 4, and after the battery module 4 is installed in the battery mounting space 161, the first heat insulation structure 2 is located between the battery module 4 and the inner peripheral wall of the housing frame 1. The first heat insulation structure 2 can be made by applying aerogel. Aerogel is a very light solid material with a density of usually 0.1 g / cm³. 3 up to 0.5 g / cm 3 Only three times heavier than air, aerogel insulation not only provides thermal insulation but also reduces the load on the battery pack 100 and saves space. Aerogel is also an environmentally friendly and renewable material with excellent thermal insulation properties. Its thermal conductivity is very low, lower than traditional insulation materials such as polystyrene boards and glass wool, resulting in superior thermal insulation performance.

[0034] Therefore, in this embodiment of the utility model, the heat insulation structure 15 on the outer peripheral wall of the box frame 1 and the first heat insulation structure 2 on the inner wall of the box frame 1 work together to insulate the battery module 4, reduce the impact of low temperature air on the battery pack 100, and also reduce the heat loss of the battery pack 100, thereby improving the working performance of the battery pack 100 in low temperature environment.

[0035] In some embodiments, a heating film 3 is provided at least partially between the battery module 4 and the inner wall of the housing frame 1, and the heating film 3 is located between the first heat insulation structure 2 and the inner wall of the housing frame 1.

[0036] In low-temperature environments, battery performance will significantly decrease, with both capacity and power declining. Long-term use at low temperatures will also accelerate battery aging and shorten its lifespan. By installing a heating film 3 on the inner wall of the housing frame 1, the housing frame 1 can be heated and kept warm, thereby keeping the battery module 4 inside the housing frame 1 warm. This reduces the impact of the external low-temperature environment on the temperature of the housing frame 1, thereby increasing the operating temperature of the battery pack 100 and improving its performance and reliability.

[0037] In other words, by placing the heating film 3 between the first heat insulation structure 2 and the housing frame 1, under low-temperature insulation conditions, placing the heating film 3 on the inner wall of the housing frame 1 can prevent the temperature of the housing frame 1 from dropping too low, thereby improving the heat preservation effect of the battery pack 100 under low-temperature conditions. Since the temperature of the battery module 4 is low when the outside temperature is low, that is, the temperature of the housing frame 1 is low, heating the housing frame 1 can keep the battery module 4 warm. At the same time, the first heat insulation structure 2 can also reduce the impact of the low temperature of the outside environment on the battery module 4. The first heat insulation structure 2 and the heating film 3 work together to improve the heat preservation effect of the battery pack 100.

[0038] In some embodiments, the heating film 3 is integrated into the inner wall of the enclosure frame 1 by hot pressing. Hot pressing technology can complete the film application process in a short time, typically only 60-90 seconds, significantly improving production efficiency compared to the several hours required by traditional hot and cold pressing processes. Furthermore, the hot-pressed film has a smooth surface, good toughness, is oil and water resistant, moisture-proof, has low shrinkage, and is not easily deformed or cracked, ensuring quality. Therefore, integrating the heating film 3 into the inner wall of the enclosure frame 1 by hot pressing improves the stability of the heating film 3, thereby enhancing the thermal insulation performance of the enclosure frame 1.

[0039] In some embodiments, the battery module 4 includes a plurality of battery cells 41 arranged along a first direction, and the heating film 3 is located at both ends of the plurality of battery cells 41 in a second direction and extends along the first direction.

[0040] Reference Figure 1 As shown, the first direction is Figure 1 In the front and back direction, multiple cells 41 along Figure 1 The cells are arranged in a front-to-back direction. Each cell 41 includes a large face and a small face. The large faces of multiple cells 41 face the front-to-back direction, and the small faces of multiple cells 41 face the left-to-right direction. The second direction is... Figure 1 In the left and right directions, the heating film 3 is placed at both ends of the second direction of multiple battery cells 41. That is, the heating film 3 of the same area can keep more battery cells 41 warm after heating the housing frame 1, thereby improving the heat preservation efficiency of the battery module 4.

[0041] In some embodiments, the housing frame 1 includes two longitudinal beams 11 and a plurality of transverse beams, each transverse beam being connected between the two longitudinal beams 11, and a first heat insulation structure 2 being provided between the battery module 4 and the transverse beams, and between the battery module 4 and the longitudinal beams 11.

[0042] By setting the housing frame 1 as a structure with two longitudinal beams 11 and multiple transverse beams, the structural strength and integrity of the housing frame 1 are improved. In addition, the multiple transverse beams can also form multiple battery installation spaces 161 inside the housing frame 1, so that different battery modules 4 can be installed in different areas. Furthermore, a first heat insulation structure 2 can be set at the contact points between the battery module 4 and the longitudinal beams 11 and the transverse beams, so that the battery module 4 is surrounded by the first heat insulation structure 2 and the battery module 4 is insulated and heat-insulated, so as to prevent the battery pack 100 from being in a low-temperature environment where the temperature drops further and affects the working performance.

[0043] In some embodiments, two of the plurality of crossbeams are end beams 13 and the other is an inner crossbeam 12. A distance is left between one end beam 13 and the adjacent inner crossbeam 12 to define an electronic control mounting space 162 between the end beam 13 and the longitudinal beam 11. The electronic control mounting space 162 is used to install the battery management module. The other end beam 13 and the other adjacent inner crossbeam 12 are connected as one unit, and the two adjacent inner crossbeams 12 and the longitudinal beam 11 define a battery mounting space 161.

[0044] Reference Figure 1 and Figure 2 As shown, there is a gap between one of the two end beams 13 and an internal crossbeam 12. This gap can form an electronic control installation space 162. A battery management module can be installed in the electronic control installation space 162. Of course, a battery power distribution unit can also be installed. The heat generated by the battery management module and the battery power distribution unit in the electronic control installation space 162 can be used to insulate the end beam 13 and the internal crossbeam 12 adjacent to the end beam 13, and can also reduce the impact of the battery module 4 on the external low temperature environment.

[0045] The end beam 13 and the adjacent internal crossbeam 12 are connected as one unit. The inner wall of the internal crossbeam 12 is provided with a first heat insulation structure 2. The hollow cavity of the end beam 13 is filled with a second heat insulation structure 14 and is provided with heat insulation cotton on the outside. The heat insulation cotton, the second heat insulation structure 14 and the first heat insulation structure 2 on the inner wall of the internal crossbeam 12 can all achieve the heat insulation effect of the battery module 4 and reduce the impact of low temperature air on the battery module 4.

[0046] In some embodiments, the cross sections of the two longitudinal beams 11 and the two end beams 13 are provided with hollow cavities, and the hollow cavities are filled with a second heat insulation structure 14.

[0047] Reference Figure 4 and Figure 5 As shown, the longitudinal beam 11 has a hollow cavity in its cross-section. Similarly, the end beam 13 also has a hollow cavity in its cross-section. Figure 4 The cross-section of the longitudinal beam 11 is used as an illustration. The hollow cavity is filled with a second heat insulation structure 14, which reduces the space occupied by the second heat insulation structure 14 and improves the heat preservation effect of the battery pack 100 in low-temperature environments, reducing the impact of the external low-temperature environment on the battery pack 100. The second heat insulation structure 14 can be heat-insulating foam. The shape of the second heat insulation structure 14 is adapted to the shape of the hollow cavity in the longitudinal beam 11 or the end beam 13. The foam can isolate heat transfer and prevent moisture and humidity from entering, improving the working performance of the battery pack 100 in low-temperature environments while also preventing the battery pack 100 from being affected by moisture and humidity, thus improving the safety of the battery pack 100.

[0048] In some embodiments, the thickness of the first heat insulation structure 2 at the longitudinal beam 11 is greater than the thickness at the inner crossbeam 12. Firstly, the longitudinal beam 11 of the battery pack 100 is parallel to the longitudinal beam 11 of the vehicle, and the crossbeam of the battery pack 100 extends along the width direction of the vehicle, that is, in the left-right direction. This means that the strength of the longitudinal beam 11 can be greater than the strength of the inner crossbeam 12 and the end beam 13. Furthermore, the thickness of the first heat insulation structure 2 at the longitudinal beam 11 can be greater than the thickness of the first heat insulation structure 2 at the inner crossbeam 12 and the end beam 13, which is equivalent to improving the heat insulation effect of the battery pack 100 while also improving the side-impact resistance of the longitudinal beam 11.

[0049] In some embodiments, the battery pack 100 further includes a liquid cooling plate 5 and a bottom support structure 6. The liquid cooling plate 5 is connected to the bottom of the battery module 4, and a third heat insulation structure is provided between the bottom of the liquid cooling plate 5 and the bottom support structure 6.

[0050] It should be noted that the battery pack 100 of this utility model embodiment mainly focuses on heat preservation of the battery module 4 under low temperature conditions. However, if the battery pack 100 is under high temperature conditions or the heat cannot be dissipated, the battery module 4 can be cooled by setting cooling water inside the liquid cooling plate 5. During cooling, heat preservation methods other than the heating film 3 have a smaller effect than cooling and do not affect the cooling process. The focus of this utility model embodiment is to keep the battery module 4 of the battery pack 100 warm at low temperatures. A third heat insulation structure is provided between the bottom of the liquid cooling plate 5 and the bottom support structure 6. The third heat insulation structure is not shown in the figure. The third heat insulation structure can also be set as an aerogel and sprayed on the bottom of the liquid cooling plate 5, thereby reducing the impact of low-temperature air from the outside on the temperature of the battery module 4 through the bottom of the battery module 4 and improving the working performance of the battery module 4 in low-temperature environments.

[0051] This utility model embodiment also discloses a vehicle, including the aforementioned battery pack 100. A first heat insulation structure 2 is provided between the housing frame 1 of the battery pack 100 and the battery module 4 to reduce heat loss from the battery module 4. At the same time, the heat insulation structure 15 outside the housing frame 1 can also isolate the battery module 4 from the influence of the external cold environment. In addition, a heating film 3 is provided on the inner wall of the housing frame 1 of the battery pack 100 to heat the housing frame 1, thereby achieving heat preservation of the battery module 4 by the housing frame 1, reducing the influence of the external low temperature environment on the battery module 4, improving the working performance of the battery pack 100 in low temperature environment, and improving the user's experience of the vehicle.

[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: A housing frame, wherein at least one battery mounting space is formed within the housing frame; At least one battery module, wherein at least one of the battery modules is installed in at least one battery mounting space in a one-to-one correspondence; The outer peripheral wall of the housing frame is provided with a heat insulation structure, and a first heat insulation structure is provided between the battery module and the inner wall of the battery installation space.

2. The battery pack according to claim 1, characterized in that, A heating film is provided at least partially between the battery module and the inner wall of the housing frame, and the heating film is located between the first heat insulation structure and the inner wall of the housing frame.

3. The battery pack according to claim 2, characterized in that, The heating film is integrated into the inner wall of the housing frame by hot pressing.

4. The battery pack according to claim 2, characterized in that, The battery module includes multiple battery cells arranged along a first direction, and the heating film is located at both ends of the multiple battery cells in a second direction and extends along the first direction.

5. The battery pack according to claim 1, characterized in that, The housing frame includes two longitudinal beams and multiple transverse beams. Each transverse beam is connected between two longitudinal beams. The first heat insulation structure is provided between the battery module and the transverse beam, and between the battery module and the longitudinal beam.

6. The battery pack according to claim 5, characterized in that, Two of the multiple crossbeams are end beams and the other is an internal crossbeam. One of the end beams and the adjacent internal crossbeam are spaced apart to define an electronic control installation space between the end beam and the longitudinal beam. The electronic control installation space is used to install the battery management module. The other end beam and the other adjacent internal crossbeam are connected as one unit, and the two adjacent internal crossbeams and the longitudinal beam define the battery installation space.

7. The battery pack according to claim 6, characterized in that, The cross-sections of the two longitudinal beams and the two end beams are provided with hollow cavities, and the hollow cavities are filled with a second heat insulation structure.

8. The battery pack according to claim 6, characterized in that, The thickness of the first thermal insulation structure at the longitudinal beam is greater than the thickness at the inner cross beam.

9. The battery pack according to claim 1, characterized in that, It also includes a liquid cooling plate and a bottom support structure. The liquid cooling plate is connected to the bottom of the battery module, and a third heat insulation structure is provided between the bottom of the liquid cooling plate and the bottom support structure.

10. A vehicle, characterized in that, Includes the battery pack as described in any one of claims 1-9.

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