Battery pack and vehicle

Abstract

The utility model provides a kind of battery pack and vehicle, comprising: battery box, the battery box is formed with accommodating cavity;Battery module assembly, the battery module assembly is installed in the accommodating cavity, the battery module assembly includes battery module and at least two spaced apart distribution's expansion beam, the battery module is equipped between two adjacent expansion beam, and the expansion beam with the battery box is detachably connected.The battery pack of the utility model embodiment, battery module is installed between two adjacent expansion beam, and expansion beam and battery box are detachably connected, convenient to install, can improve production efficiency, and when the structure in battery module assembly is damaged, battery module assembly can be replaced, and then facilitate later maintenance, can reduce maintenance cost, improve user experience, use effect is better, and the scope of application is wider.

Description

Technical Field

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

[0002] With the development of the national economy and the continuous improvement of people's living standards, vehicles are becoming increasingly important in daily life and travel. The environmental performance of vehicles during operation and the maintenance costs during later use are key considerations in vehicle manufacturing. Existing vehicles have battery packs that power the entire vehicle and improve its environmental friendliness. However, the existing battery packs use adhesive bonding between the battery cells and the liquid cooling plate, and friction stir welding to connect the liquid cooling plate to the battery pack casing. This prevents module-level repair and replacement of the battery pack, resulting in inflexible installation, low manufacturing efficiency, and high maintenance costs, indicating room for improvement. Utility Model Content

[0003] 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 that is easy to install, improves production efficiency, facilitates later maintenance, reduces maintenance costs, and enhances the user experience.

[0004] A battery pack according to an embodiment of the present utility model includes: a battery housing having a receiving cavity; and a battery module assembly installed in the receiving cavity. The battery module assembly includes a battery module and at least two spaced-apart expansion beams, with the battery module disposed between two adjacent expansion beams, and the expansion beams being detachably connected to the battery housing.

[0005] According to the battery pack of this utility model embodiment, the battery module is installed between two adjacent expansion beams, and the expansion beams are detachably connected to the battery box, which is convenient for installation, can improve production efficiency, and when the structure inside the battery module assembly is damaged, the battery module assembly can be replaced, which facilitates later maintenance, reduces maintenance costs, improves user experience, has better performance, and has a wider range of applications.

[0006] According to some embodiments of the present invention, the battery module assembly further includes a liquid cooling plate, which is installed at the bottom of the battery module and the expansion beam, and the expansion beam and the liquid cooling plate are detachably connected to the bottom of the battery box via connectors.

[0007] According to some embodiments of the present invention, the expansion beam is provided with a first connecting hole, the liquid cooling plate is provided with a through hole, the battery box is provided with a second connecting hole, and the connector passes through the first connecting hole and the through hole in sequence and then connects and cooperates with the second connecting hole.

[0008] According to some embodiments of the present invention, a sealing element is provided between the expansion beam and the liquid cooling plate in the battery pack;

[0009] And / or, the battery module assembly further includes an insulating element, at least a portion of which is located between the expansion beam and the battery module.

[0010] According to some embodiments of the present invention, the battery pack has a sealing component constructed of sealant, and an insulating component comprising a bent connecting portion and a sealing portion. The connecting portion is located between the expansion beam and the battery module, and the sealing portion is located between the liquid cooling plate and the battery module.

[0011] According to some embodiments of the present invention, the battery pack includes multiple sets of battery modules and liquid cooling plates, with each set of battery modules and liquid cooling plates corresponding to the other.

[0012] According to some embodiments of the present invention, the battery pack has multiple expansion beams, which are spaced apart and distributed in the receiving cavity along a first direction, and the expansion beams extend along a second direction, where the first direction intersects the second direction.

[0013] In the first direction, an expansion space is formed between the expansion beam at the end and the battery box.

[0014] According to some embodiments of the present invention, the battery pack has a pressure beam in the expansion space, the pressure beam abuts against the expansion beam located at the end and the battery box along the first direction, and the battery module is inserted between two adjacent expansion beams.

[0015] According to some embodiments of the present invention, the battery pack includes a cover, a frame, and a bottom protective plate. The cover and the bottom protective plate are detachably installed at both ends of the frame to jointly define the receiving cavity. The expansion beam is detachably connected to the bottom protective plate.

[0016] This utility model also proposes a vehicle.

[0017] The vehicle according to the embodiments of the present invention includes the battery pack described in any of the above claims.

[0018] The vehicle and the aforementioned battery pack have the same advantages over the prior art, which will not be repeated here.

[0019] 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

[0020] 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:

[0021] Figure 1 This is an exploded view of a battery pack according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the structure of a battery module assembly according to an embodiment of the present utility model;

[0023] Figure 3 This is a partial structural schematic diagram of a battery pack according to an embodiment of the present utility model;

[0024] Figure 4 This is a partial structural schematic diagram of a battery module assembly according to an embodiment of the present utility model.

[0025] Figure label:

[0026] Battery pack 100,

[0027] Battery housing 1, housing cover 11, frame 12, expansion space 121, pressure beam 122, bottom protective plate 13, second connecting hole 131, receiving cavity 14.

[0028] Battery module assembly 2, battery module 21, expansion beam 22, first connecting hole 221, liquid cooling plate 23, through hole 231, connector 24, insulating component 25, connecting part 251, sealing part 252. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] The following is for reference. Figures 1-4 The battery pack 100 according to the embodiment of the present utility model is easy to install, can improve production efficiency, facilitates later maintenance, reduces maintenance costs, and improves user experience.

[0033] like Figures 1-4 As shown, a battery pack 100 according to an embodiment of the present invention includes: a battery housing 1 and a battery module assembly 2.

[0034] The battery housing 1 has a receiving cavity 14, and the battery module assembly 2 is installed in the receiving cavity 14. The battery module assembly 2 includes a battery module 21 and at least two spaced expansion beams 22. The battery module 21 is provided between two adjacent expansion beams 22, and the expansion beams 22 are detachably connected to the battery housing 1.

[0035] The battery pack 100 is an integrated unit assembled from multiple battery modules 21, used to store and provide electrical energy. The battery pack 100 is a higher-level component in the battery system, typically consisting of several battery modules 21, connectors, a battery management system, a cooling system, electrical interfaces, and a casing. The battery pack 100 is the core energy storage unit for new energy vehicles, providing power to drive the vehicle and improving its environmental friendliness.

[0036] Specifically, the battery pack 100 is provided with a battery housing 1, which is located on the outermost side of the battery pack 100. The battery housing 1 can be made of rolled steel, which has high structural strength. This allows the battery housing 1 to protect the internal structure of the battery pack 100, preventing damage to the internal structure of the battery pack 100 in the event of impacts or other incidents, thus extending the service life of the battery pack 100. It also provides mounting points for the internal structure of the battery pack 100, ensuring the operational reliability of the battery pack 100. The battery pack 100 is also provided with a battery module assembly 2. A receiving cavity 14 is formed inside the battery housing 1, and the battery module assembly 2 can be installed in the receiving cavity 14. This allows the battery housing 1 to protect the battery module assembly 2, ensuring the reliability of the battery pack 100 in use.

[0037] Furthermore, the battery module assembly 2 includes a battery module 21, which is a unit assembled from multiple battery cells to provide voltage and capacity. The main function of the battery module 21 is to connect multiple battery cells together to increase the voltage and energy storage capacity of the battery system. The battery cells can be connected in parallel or in series. Connecting the cells in series increases the total voltage, while connecting the cells in parallel increases the total capacity, so that the battery module 21 can meet the power requirements of different applications.

[0038] Furthermore, the battery module assembly 2 is provided with at least two expansion beams 22, that is, the expansion beams 22 can be set to two, three or four, etc., with at least two expansion beams 22 spaced apart so that an installation space can be formed between two adjacent expansion beams 22. The battery module 21 can be installed between two adjacent expansion beams 22, and the expansion beams 22 are detachably connected to the battery box 1, so that the battery module 21 is also detachable relative to the battery box 1, which facilitates the installation of the battery module assembly 2 and can improve production efficiency.

[0039] Meanwhile, the expansion beam 22 is detachably connected to the battery box 1. That is, the expansion beam 22 can be connected to the battery box 1 through the connector 24 or snap-fit. The battery module 21 is installed between two adjacent expansion beams 22, so that when the expansion beam 22 is disassembled relative to the battery box 1, the battery module assembly 2 can be taken out as a whole from the receiving cavity 14. This allows the battery module assembly 2 to be removed and replaced if any structure in the battery module assembly 2 is damaged, which facilitates later maintenance, reduces maintenance costs, and improves the user experience.

[0040] According to the battery pack 100 of this utility model embodiment, the battery module 21 is installed between two adjacent expansion beams 22, and the expansion beams 22 are detachably connected to the battery box 1. The installation is convenient and can improve production efficiency. When the structure inside the battery module assembly 2 is damaged, the battery module assembly 2 can be replaced, which facilitates later maintenance, reduces maintenance costs, improves user experience, and has better performance and wider applicability.

[0041] In some embodiments, the battery module assembly 2 further includes a liquid cooling plate 23, which is installed at the bottom of the battery module 21 and the expansion beam 22, and the expansion beam 22 and the liquid cooling plate 23 are detachably connected to the bottom of the battery housing 1 via a connector 24.

[0042] Specifically, such as Figures 1-2 As shown, a liquid cooling plate 23 is also provided inside the battery module assembly 2. The liquid cooling plate 23 can be installed at the bottom of the battery module 21 and the expansion beam 22. The liquid cooling plate 23 is provided with an inlet and an outlet, and a medium flow channel is provided inside the liquid cooling plate 23. The inlet and outlet are respectively connected to the medium flow channel. When the battery pack 100 is running, the low temperature medium can flow from the inlet into the medium flow channel. The liquid cooling plate 23 is installed at the bottom of the battery module 21. When the battery pack 100 is running, the battery module 21 will generate heat. The battery module 21 can exchange heat with the low temperature medium in the medium flow channel so that the liquid cooling plate 23 can cool down the battery module 21 and ensure that the battery module 21 operates within the normal operating temperature range to ensure the reliability of the battery pack 100. The medium after heat exchange can flow out of the medium flow channel from the outlet to ensure the reliability of the liquid cooling plate 23.

[0043] Furthermore, the battery module 21 is installed between two adjacent expansion beams 22, and the liquid cooling plate 23 is installed at the bottom of the battery module 21 and the expansion beams 22. That is, the liquid cooling plate 23 is installed between the battery box 1 and the expansion beams 22. The expansion beams 22 are detachable from the battery box 1, and the expansion beams 22 and the liquid cooling plate 23 are detachably connected to the bottom of the battery box 1 through connectors 24. The connectors 24 can be bolts, etc. The structure is simple, the installation is convenient, and the setup cost is low. This makes both the liquid cooling plate 23 and the battery module 21 detachable from the battery box 1, which facilitates installation and subsequent maintenance, reduces maintenance costs, and improves the user experience.

[0044] In some embodiments, the expansion beam 22 is provided with a first connecting hole 221, the liquid cooling plate 23 is provided with a through hole 231, the battery box 1 is provided with a second connecting hole 131, and the connector 24 passes through the first connecting hole 221 and the through hole 231 in sequence and then connects and cooperates with the second connecting hole 131.

[0045] Specifically, both the expansion beam 22 and the liquid cooling plate 23 are detachably connected to the bottom of the battery box 1 via connectors 24, and as shown in the figure. Figures 1-3 As shown, the expansion beam 22 is provided with a first connecting hole 221, the liquid cooling plate 23 is provided with a through hole 231, and the bottom of the battery box 1 is provided with a second connecting hole 131. The connector 24 can pass through the first connecting hole 221 and the through hole 231 in sequence to connect and cooperate with the second connecting hole 131, so that the expansion beam 22 and the liquid cooling plate 23 can be detachably connected to the bottom of the battery box 1 through the connector 24.

[0046] Furthermore, both the first connecting hole 221 and the second connecting hole 131 can be configured as threaded holes, and the connector 24 is configured as a bolt, so that the connector 24 can be threadedly engaged with the first connecting hole 221 and the second connecting hole 131 to ensure the reliability of the connection between the connector 24 and the first connecting hole 221 and the second connecting hole 131. The liquid cooling plate 23 is provided with a through hole 231. The liquid cooling plate 23 has a medium flow channel inside. The through hole 231 needs to avoid the medium flow channel to ensure the reliability of the operation of the liquid cooling plate 23. After the connector 24 passes through the through hole 231, it can limit the through hole 231, and then limit the liquid cooling plate 23 to ensure the reliability of the installation of the liquid cooling plate 23.

[0047] Furthermore, multiple first connecting holes 221 can be provided, with multiple first connecting holes 221 distributed at intervals along the length direction of the expansion beam 22. Multiple through holes 231 and multiple second connecting holes 131 are also provided. Multiple first connecting holes 221, multiple through holes 231 and multiple second connecting holes 131 are all provided in a one-to-one correspondence, so that multiple parts of the expansion beam 22 and the liquid cooling plate 23 can be detachably connected to the bottom of the battery box 1 to improve the connection reliability. Moreover, the force can be evenly distributed to multiple connectors 24 to extend the service life of the connectors 24.

[0048] In some embodiments, a seal is provided between the expansion beam 22 and the liquid cooling plate 23.

[0049] Specifically, the connector 24 can be sequentially inserted through the bottom of the expansion beam 22, the liquid cooling plate 23 and the battery box 1 to install the expansion beam 22 and the liquid cooling plate 23. A sealing element is provided between the bottom of the expansion beam 22 and the top of the liquid cooling plate 23. The battery module 21 is located between the two expansion beams 22, so that the sealing element can seal both sides of the battery module 21 to ensure the operational reliability of the battery module 21, thereby ensuring the operational reliability of the battery pack 100.

[0050] In other embodiments, the battery module assembly 2 further includes an insulating member 25, at least a portion of which is located between the expansion beam 22 and the battery module 21.

[0051] Specifically, the battery module assembly 2 is also provided with an insulating component 25, such as... Figure 1 and Figure 4As shown, at least a portion of the insulating member 25 is located between the expansion beam 22 and the battery module 21. This means that either a portion of the insulating member 25 can be placed between the expansion beam 22 and the battery module 21, or all of the insulating members 25 can be placed between the expansion beam 22 and the battery module 21. The insulating member 25 is made of insulating material, which can isolate the expansion beam 22 and the battery module 21, ensuring the operational reliability of the battery module 21, and thus ensuring the operational reliability of the battery pack 100.

[0052] Furthermore, the insulating component 25 can be connected to the expansion beam 22 by means of bonding or other methods. When the battery pack 100 is installed, the liquid cooling plate 23 can be installed in the receiving cavity 14, and then the expansion beam 22 can be installed on the liquid cooling plate 23. The expansion beam 22 and the liquid cooling plate 23 are fixed to the bottom of the battery box 1 by means of connector 24. Then, the insulating component 25 is installed on the side of the expansion beam 22 near the installation space by means of bonding or other methods. Then, the battery module 21 can be installed between two adjacent expansion beams 22. At this time, the connector 24 can be removed so that the liquid cooling plate 23, the expansion beam 22 and the battery module 21 are all detachable from the battery box 1, which is convenient for later maintenance.

[0053] In some embodiments, the seal is constructed as a sealant, and the insulating member 25 includes a bent and connected connecting portion 251 and a sealing portion 252. The connecting portion 251 is located between the expansion beam 22 and the battery module 21, and the sealing portion 252 is located between the liquid cooling plate 23 and the battery module 21.

[0054] Specifically, the expansion beam 22 is installed above the liquid cooling plate 23, and a seal is provided between the expansion beam 22 and the liquid cooling plate 23. The seal can be constructed as a sealant. After the liquid cooling plate 23 is placed in the receiving cavity 14, the sealant can be applied to the bottom of the expansion beam 22, and then the expansion beam 22 is installed on the liquid cooling plate 23 to seal between the expansion beam 22 and the liquid cooling plate 23. This allows the sealant to seal both sides of the battery module 21 when it is installed between two adjacent expansion beams 22, thereby improving the reliability of the battery module 21.

[0055] Furthermore, such as Figure 4 As shown, the insulating component 25 is also provided with a connecting part 251 and a sealing part 252. The connecting part 251 and the sealing part 252 are bent and connected together. The connecting part 251 can be bonded to the side of the expansion beam 22 near the installation space, so that the connecting part 251 can be installed between the expansion beam 22 and the battery module 21. The sealing part 252 can be bonded to the upper part of the liquid cooling plate 23, so that the sealing part 252 can be installed between the liquid cooling plate 23 and the battery module 21. In this way, the insulating component 25 can seal the gap between the expansion beam 22 and the liquid cooling plate 23 to prevent the sealant from overflowing from between the expansion beam 22 and the liquid cooling plate 23 to the battery module 21, thereby ensuring the operational reliability of the battery module 21.

[0056] In some embodiments, the battery module 21 and the liquid cooling plate 23 are both set in multiple groups, and the multiple groups of battery modules 21 and the multiple groups of liquid cooling plates 23 are arranged in a one-to-one correspondence.

[0057] Specifically, the battery module 21 can be configured as multiple groups, that is, the battery module 21 can be configured as two groups, three groups or four groups, etc. The configuration of multiple battery modules 21 can increase the battery capacity of the battery pack 100, thereby improving the battery pack 100's range performance and enhancing the user experience. The liquid cooling plate 23 is also configured as multiple groups, that is, the liquid cooling plate 23 can be configured as two groups, three groups or four groups, etc. The multiple battery modules 21 and the multiple liquid cooling plates 23 are configured one-to-one, so that each battery module 21 is equipped with a corresponding set of liquid cooling plates 23. This allows each set of liquid cooling plates 23 to cool down the corresponding battery module 21, ensuring the operational stability of the battery module 21 and extending the service life of the battery pack 100.

[0058] In this embodiment, as Figures 1-2 As shown, the battery module 21 is configured as two sets, and the liquid cooling plate 23 is also configured as two sets. The two sets of battery modules 21 are respectively installed between two adjacent expansion beams 22, and each set of liquid cooling plates 23 can also be connected to the two adjacent expansion beams 22 through connectors 24, thereby ensuring the installation stability of each set of battery modules 21 and each set of liquid cooling plates 23, so as to improve the reliability of the battery pack 100.

[0059] In some embodiments, multiple expansion beams 22 are provided, and the multiple expansion beams 22 are spaced apart in the receiving cavity 14 along a first direction, and the expansion beams 22 extend along a second direction, the first direction intersecting the second direction, wherein, in the first direction, an expansion space 121 is formed between the expansion beam 22 located at the end and the battery box 1.

[0060] Specifically, multiple expansion beams 22 can be configured, i.e., two, three, or four expansion beams 22. In this embodiment, three expansion beams 22 are configured. Multiple expansion beams 22 are spaced apart along the first direction within the receiving cavity 14, and multiple expansion beams 22 extend along the second direction. The first direction and the second direction intersect. In this embodiment, the first direction and the second direction are perpendicular, and the first direction is the length direction of the battery box 1, and the second direction is the width direction of the battery box 1. This allows multiple expansion beams 22 to define multiple installation spaces. Battery modules 21 are installed between two adjacent expansion beams 22, thereby allowing multiple sets of battery modules 21 to be installed on multiple expansion beams 22 to increase the energy storage capacity of the battery pack 100 and meet different usage requirements.

[0061] Furthermore, in the first direction, an expansion space 121 is formed between the expansion beam 22 located at the end and the battery box 1. That is, an expansion space 121 can be formed between one of the expansion beams 22 located at one end of the receiving cavity 14 and the battery box 1, and an expansion space 121 can also be formed between one of the expansion beams 22 located at the other end of the receiving cavity 14 and the battery box 1. This ensures that when the battery module 21 is installed between two adjacent expansion beams 22, the two ends of the battery module 21 and the battery box 1 are spaced apart. This prevents damage to the battery module 21 when the two ends of the battery box 1 collide, thereby improving the safety of the battery module 21 and extending the service life of the battery pack 100.

[0062] In some embodiments, the expansion space 121 is provided with a pressure beam 122, which presses against the expansion beam 22 located at the end and the battery box 1 along a first direction, and the battery module 21 is inserted between two adjacent expansion beams 22.

[0063] Specifically, the expansion space 121 is disposed at both ends of the battery housing 1 along the first direction, and as follows: Figure 3 As shown, a pressure beam 122 is provided in the expansion space 121. The pressure beam 122 can extend along a first direction, and the expansion beam 22 can extend along a second direction, so that one end of the pressure beam 122 can press against the expansion beam 22 and the other end can press against the battery box 1. This allows the pressure beam 122 to press against the expansion beam 22 at the end and the battery box 1 along the first direction, thereby improving the structural strength of the battery box 1 along the first direction and ensuring the reliability of the battery pack 100.

[0064] Furthermore, the battery module 21 can be inserted between two adjacent expansion beams 22, and the pressure beam 122 can press against the expansion beam 22, thereby pressing the expansion beam 22 against the battery module 21. Multiple pressure beams 122 can be provided, and the multiple pressure beams 122 are spaced apart along the second direction, so that the pressure beams 122 can press against the expansion beam 22 at various points along the length direction, so as to ensure that the expansion beam 22 can be tightly attached to the battery module 21 at various points along the length direction, and to ensure the installation reliability of the battery module 21.

[0065] In some embodiments, the battery housing 1 includes a cover 11, a frame 12, and a bottom protective plate 13. The cover 11 and the bottom protective plate 13 are detachably mounted on both ends of the frame 12 to jointly define the receiving cavity 14. The expansion beam 22 is detachably connected to the bottom protective plate 13.

[0066] Specifically, the battery housing 1 is located on the outermost side of the battery pack 100, and as shown below... Figure 1As shown, the battery box 1 is provided with a cover 11, a frame 12 and a bottom guard plate 13. The cover 11 is detachably installed at one end of the frame 12, that is, the cover 11 can be connected to one end of the frame 12 through a connector 24, etc. The bottom guard plate 13 is detachably installed at the other end of the frame 12, that is, the bottom guard plate 13 can be connected to the other end of the frame 12 through a connector 24, etc., so that the cover 11, the frame 12 and the bottom guard plate 13 can jointly define a receiving cavity 14 for installing battery module components 2, etc., and make the battery box 1 detachable, which facilitates installation and subsequent maintenance, saving maintenance time.

[0067] Furthermore, such as Figure 3 As shown, the expansion beam 22 is installed in the receiving cavity 14. The expansion beam 22 extends along the width direction of the frame 12, and the two ends of the expansion beam 22 abut against the two inner walls of the frame 12 along the width direction, so that the expansion beam 22 can support the frame 12, thereby improving the overall structural strength of the battery box 1 and ensuring the reliability of the battery pack 100. Both the expansion beam 22 and the liquid cooling plate 23 can be detachably connected to the bottom guard plate 13, that is, the second connection hole 131 is provided in the bottom guard plate 13. The structural strength of the bottom guard plate 13 is set to be high, which can ensure the installation reliability of the battery module assembly 2.

[0068] This utility model also proposes a vehicle.

[0069] The vehicle according to the present invention includes the battery pack 100 of any of the above claims.

[0070] According to the vehicle of this utility model embodiment, the battery module 21 is installed between two adjacent expansion beams 22, and the expansion beams 22 are detachably connected to the battery box 1. The installation is convenient and can improve production efficiency. When the structure inside the battery module assembly 2 is damaged, the battery module assembly 2 can be replaced, which facilitates later maintenance, reduces maintenance costs, improves user experience, and has a better performance and wider applicability.

[0071] 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.

[0072] 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 battery housing having a receiving cavity; A battery module assembly is installed within the receiving cavity. The battery module assembly includes a battery module and at least two spaced-apart expansion beams. The battery module is disposed between two adjacent expansion beams, and the expansion beams are detachably connected to the battery housing.

2. The battery pack according to claim 1, characterized in that, The battery module assembly also includes a liquid cooling plate, which is installed at the bottom of the battery module and the expansion beam, and the expansion beam and the liquid cooling plate are detachably connected to the bottom of the battery box via connectors.

3. The battery pack according to claim 2, characterized in that, The expansion beam is provided with a first connecting hole, the liquid cooling plate is provided with a through hole, the battery box is provided with a second connecting hole, and the connector passes through the first connecting hole and the through hole in sequence and then connects and cooperates with the second connecting hole.

4. The battery pack according to claim 2, characterized in that, A sealing element is provided between the expansion beam and the liquid cooling plate; And / or, the battery module assembly further includes an insulating element, at least a portion of which is located between the expansion beam and the battery module.

5. The battery pack according to claim 4, characterized in that, The sealing element is constructed of sealant, and the insulating element includes a bent connecting part and a sealing part. The connecting part is located between the expansion beam and the battery module, and the sealing part is located between the liquid cooling plate and the battery module.

6. The battery pack according to claim 2, characterized in that, The battery module and the liquid cooling plate are both set in multiple groups, and the multiple groups of battery modules and the multiple groups of liquid cooling plates are set in a one-to-one correspondence.

7. The battery pack according to any one of claims 1-6, characterized in that, The expansion beams are provided in multiple ways, and the multiple expansion beams are distributed at intervals along a first direction in the receiving cavity, and the expansion beams extend along a second direction, the first direction intersecting the second direction; In the first direction, an expansion space is formed between the expansion beam at the end and the battery box.

8. The battery pack according to claim 7, characterized in that, The expansion space is provided with a pressure beam, which presses against the expansion beam located at the end and the battery box along the first direction, and the battery module is inserted between two adjacent expansion beams.

9. The battery pack according to any one of claims 1-6, characterized in that, The battery box includes a cover, a frame, and a bottom protective plate. The cover and the bottom protective plate are detachably installed at both ends of the frame to jointly define the receiving cavity. The expansion beam is detachably connected to the bottom protective plate.

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

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