Battery pack and vehicle

Abstract

The utility model provides a battery pack and a vehicle, and relates to the technical field of power batteries. The battery pack provided by the utility model comprises a shell, a battery cell assembly, a low-voltage power supply module and a battery control module, the shell is provided with a first accommodating cavity and a second accommodating cavity which are arranged along a first direction, the battery cell assembly is arranged in the first accommodating cavity, and the low-voltage power supply module and the battery control module are arranged in the second accommodating cavity; the battery cell assembly and the low-voltage power supply module are electrically connected with the battery control module respectively, and the battery control module is configured to control charging and discharging of the battery cell assembly and the low-voltage power supply module respectively; the low-voltage power supply module is configured to supply power to low-voltage electrical appliances of the vehicle. By arranging the low-voltage power supply module in the battery pack, the low-voltage power supply module can supply power to the low-voltage electric appliance of the vehicle even if the battery cell assembly breaks down and cannot supply power to the low-voltage electric appliance, so that normal work of the low-voltage electric appliance of the vehicle is ensured, and the user experience is improved.

Description

Technical Field

[0001] This application relates to power battery technology, and more particularly to a battery pack and a vehicle. Background Technology

[0002] In recent years, the electric vehicle industry has developed rapidly. As an important component of electric vehicles, the battery pack not only relates to the performance and safety of electric vehicles, but also directly affects their market competitiveness and sustainable development.

[0003] Currently, battery packs can not only provide power when electric vehicles are in motion, but also provide power to low-voltage electrical appliances in electric vehicles, such as powering the starter controller in electric vehicles to wake up the vehicle and unlock it.

[0004] However, in some application scenarios, a battery pack failure can lead to a situation where the vehicle's low-voltage electrical appliances cannot be powered, or even prevent the vehicle from starting. Utility Model Content

[0005] In view of this, this application provides a battery pack and a vehicle that can solve the problem of being unable to supply power to low-voltage loads in vehicles in some application scenarios.

[0006] To achieve the above objectives, this application provides a battery pack and vehicle, which adopt the following technical solution:

[0007] In a first aspect, this application provides a battery pack for a vehicle, the battery pack including a housing, a cell assembly, a low-voltage power module and a battery control module; the housing has a first receiving cavity and a second receiving cavity arranged along a first direction, the cell assembly is disposed in the first receiving cavity, and the low-voltage power module and the battery control module are both disposed in the second receiving cavity;

[0008] The battery cell assembly and the low-voltage power supply module are electrically connected to the battery control module, and the battery control module is configured to control the charging and discharging of the battery cell assembly and the low-voltage power supply module, respectively; the low-voltage power supply module is configured to supply power to the low-voltage electrical appliances of the vehicle.

[0009] In one possible implementation, the battery pack provided in this application has the low-voltage power module and the battery control module arranged in the second receiving cavity along a second direction, which is perpendicular to the first direction.

[0010] In one possible implementation, the battery pack provided in this application includes a low-voltage power module comprising at least one cylindrical cell, the cylindrical cell being transversely positioned in the second receiving cavity; the positive terminal of the cylindrical cell is configured to be electrically connected to a low-voltage electrical appliance of the vehicle, and the negative terminal of the cylindrical cell is electrically connected to the housing.

[0011] In one possible implementation, the battery pack provided in this application has a through hole on the side wall of the housing opposite to the first receiving cavity, and a connector opposite to the through hole is connected to the outside of the housing. The positive electrode of the cylindrical cell is electrically connected to the connector through the through hole via a wire harness. The connector is configured to be electrically connected to the low-voltage electrical appliance of the vehicle via the wire harness.

[0012] In one possible implementation, the battery pack provided in this application includes multiple cylindrical cells stacked together; the multiple cylindrical cells are connected in series sequentially.

[0013] In one possible implementation, the battery pack provided in this application further includes a signal acquisition module disposed within the first accommodating cavity and located to the side of the cell assembly; the signal acquisition module is configured to acquire status information of the cell assembly; and the signal acquisition module is electrically connected to the battery control module.

[0014] In one possible implementation, the battery pack provided in this application further includes a thermal management module, which includes a plurality of cold plates, a portion of which is configured to dissipate heat from the battery cell assembly; at least one of the plurality of cold plates is disposed opposite to the low-voltage power module and is configured to dissipate heat from the low-voltage power module.

[0015] In one possible implementation, the battery pack provided in this application has an explosion-proof valve on the housing; and an exhaust gap is provided between the cell assembly and the inner wall of the first receiving cavity.

[0016] In one possible implementation, the battery pack provided in this application includes a battery control module comprising a control motherboard and a relay electrically connected to the control motherboard, the relay being electrically connected to the low-voltage power module to control the charging and discharging of the low-voltage power module.

[0017] Secondly, this application provides a vehicle, the vehicle including a vehicle body and the aforementioned battery pack; the battery pack is disposed on the vehicle body.

[0018] The battery pack and vehicle provided in this application include a housing, a cell assembly, a low-voltage power module, and a battery control module. The housing has a first receiving cavity and a second receiving cavity arranged along a first direction. The cell assembly is disposed in the first receiving cavity, and the low-voltage power module and the battery control module are both disposed in the second receiving cavity. The cell assembly and the low-voltage power module are electrically connected to the battery control module, which is configured to control the charging and discharging of the cell assembly and the low-voltage power module respectively. The low-voltage power module is configured to supply power to the vehicle's low-voltage electrical appliances. By incorporating the low-voltage power module within the battery pack and utilizing it to supply power to the vehicle's low-voltage electrical appliances, it is understood that even if the cell assembly malfunctions and cannot supply power to the low-voltage electrical appliances, the low-voltage power module can still supply power to the vehicle's low-voltage electrical appliances, ensuring their normal operation and improving the user experience.

[0019] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the technical solutions provided by this application, other technical features contained in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0020] The specific embodiments of this application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of this application, and this application is not limited to the specific embodiments described below.

[0021] Figure 1 This is a schematic diagram of the structure of a battery pack provided in an embodiment of this application;

[0022] Figure 2 for Figure 1 A structural diagram from another perspective.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100. Shell;

[0025] 101. Through hole;

[0026] 200. Battery cell assembly;

[0027] 300. Low-voltage power supply module;

[0028] 400. Battery control module;

[0029] 500. First receiving cavity;

[0030] 501. Exhaust clearance;

[0031] 600. Second receiving cavity;

[0032] 700, cylindrical battery cell;

[0033] 800. Connectors;

[0034] 910. Signal acquisition module;

[0035] 920. Cold-rolled steel plate;

[0036] 930. Explosion-proof valve.

[0037] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0039] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] In the description of the embodiments of this application, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0041] In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise specified precisely.

[0042] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0043] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0044] As described in the background section, the battery pack not only provides power when the electric vehicle is in motion, but also provides electrical energy to the low-voltage electrical appliances in the electric vehicle.

[0045] For example, it can power the starter controller in an electric vehicle to wake up the vehicle and unlock it. In some application scenarios, such as when the vehicle has been parked for a long time and the battery pack is depleted, or when a collision causes the battery pack to fail, the battery pack may not be able to supply power to the low-voltage electrical appliances in the vehicle.

[0046] For example, if the vehicle's starter controller cannot be powered, the vehicle will be unable to unlock. Alternatively, if the vehicle's camera monitoring system cannot be powered, the user will be unable to record the accident scene after an accident. Or, if the vehicle's call system cannot be powered, the user will be unable to contact rescue in a timely manner after an accident.

[0047] Based on the above-mentioned technical problems, this application provides a battery pack and a vehicle. In this technical solution, the battery pack includes a housing, a cell assembly, a low-voltage power module, and a battery control module. The housing has a first receiving cavity and a second receiving cavity arranged along a first direction. The cell assembly is disposed in the first receiving cavity, and the low-voltage power module and the battery control module are both disposed in the second receiving cavity.

[0048] The battery cell assembly and the low-voltage power module are electrically connected to the battery control module, which is configured to control the charging and discharging of the battery cell assembly and the low-voltage power module respectively; the low-voltage power module is configured to supply power to the vehicle's low-voltage electrical appliances.

[0049] By incorporating a low-voltage power module within the battery pack and utilizing this module to supply power to the vehicle's low-voltage electrical appliances, it is understood that even if the battery cell assembly malfunctions and cannot supply power to the low-voltage appliances, the low-voltage power module can still provide power to the vehicle's low-voltage appliances, ensuring their normal operation and improving the user experience.

[0050] It should be noted that, Figures 1 to 2 This diagram illustrates a simplified representation of the battery pack and various components within the vehicle. The specific structures of the battery pack and other components in the vehicle are not limited to these examples. Figures 1 to 2 of examples.

[0051] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0052] Figure 1 This is a schematic diagram of the structure of a battery pack provided in an embodiment of this application; Figure 2 for Figure 1 A structural diagram from another perspective.

[0053] Reference Figure 1 and Figure 2 As shown in the figure, this application provides a battery pack for a vehicle. The battery pack includes a housing 100, a cell assembly 200, a low-voltage power module 300, and a battery control module 400.

[0054] The housing 100 has a first receiving cavity 500 and a second receiving cavity 600 arranged along a first direction. The battery cell assembly 200 is disposed in the first receiving cavity 500, and the low-voltage power supply module 300 and the battery control module 400 are both disposed in the second receiving cavity 600.

[0055] The cell assembly 200 and the low-voltage power module 300 are electrically connected to the battery control module 400, which is configured to control the charging and discharging of the cell assembly 200 and the low-voltage power module 300 respectively.

[0056] The low-voltage power module 300 is configured to supply power to the vehicle's low-voltage electrical appliances.

[0057] In the above embodiments, it should be noted that the battery pack casing 100 is prior art in the relevant technical field, and its specific structure is not limited herein. The first direction can be referred to... Figure 1 In the Y direction, the cell assembly 200 is disposed in the first receiving cavity 500. The number of cell assemblies 200 can be selected according to actual design needs. The cell assembly 200 may include multiple cylindrical cells, or multiple blade cells. The specific structure of the cell assembly 200 is not limited in this embodiment.

[0058] By incorporating a low-voltage power module 300 within the battery pack and utilizing it to supply power to the vehicle's low-voltage electrical appliances, it is understood that even if the battery cell assembly 200 is unable to supply power to the low-voltage electrical appliances, such as in the event of a malfunction in the battery cell assembly 200, the low-voltage power module 300 can still supply power to the vehicle's low-voltage electrical appliances, ensuring their normal operation and improving the user experience.

[0059] In practice, the low-voltage electrical appliances can be at least one of the vehicle's start controller, the vehicle's central control screen, or the vehicle's alarm system, to ensure that the aforementioned low-voltage electrical appliances can work normally in certain application scenarios and guarantee the vehicle's safety.

[0060] Furthermore, by providing a first receiving cavity 500 and a second receiving cavity 600 through the housing 100, and by providing a battery cell assembly 200 in the first receiving cavity 500 and a low-voltage power module 300 and a battery control module 400 in the second receiving cavity 600, the internal space of the housing 100 can be fully utilized, and the components do not interfere with each other.

[0061] It is understandable that existing technologies use battery cell modules in conjunction with control modules to enable some battery cell modules to supply power to low-voltage electrical appliances. However, the above setup undoubtedly increases research and development costs and complicates the battery cell modules. By integrating the low-voltage power module 300 into the battery pack, the structure can be simplified, research and development costs can be reduced, and the reliability of the structure can be improved.

[0062] In one possible implementation, the low-voltage power supply module 300 and the battery control module 400 are arranged in the second receiving cavity 600 along a second direction, which is perpendicular to the first direction. The second direction can be referred to as... Figure 1 The X direction is perpendicular to the Y direction.

[0063] In the above embodiments, by arranging the low-voltage power supply module 300 and the battery control module 400 along the second direction in the second receiving cavity 600, the space of the second receiving cavity 600 can be fully utilized. In addition, the installation of the low-voltage power supply module 300 and the battery control module 400 can be simple and intuitive, which facilitates the later maintenance and debugging process.

[0064] In other possible implementations, the low-voltage power module 300 includes at least one cylindrical cell 700, which is transversely placed in the second receiving cavity 600; the positive terminal of the cylindrical cell 700 is configured to be electrically connected to a low-voltage electrical appliance of the vehicle, and the negative terminal of the cylindrical cell 700 is electrically connected to the housing 100.

[0065] In the above embodiments, the cylindrical cell 700 has a low manufacturing cost, which helps to reduce the R&D cost of the battery pack. The cylindrical cell 700 typically has a high energy density, which means that it can store more electrical energy in a relatively small volume to improve the energy density of the low-voltage power module 300. In addition, the cylindrical cell 700 has a high safety.

[0066] More importantly, the cylindrical cell 700 is widely used in vehicle battery packs, which reduces the R&D cost of the low-voltage power module 300. The cylindrical cell 700 is positioned along the second direction, which makes full use of the space of the second receiving cavity 600, thereby increasing the energy density of the low-voltage power module 300.

[0067] Furthermore, the cylindrical cell 700 can be a 12V lithium battery. Lithium batteries have a high energy density, which can increase the capacity of the cylindrical cell 700. In addition, lithium batteries have a long service life and high safety.

[0068] In one possible implementation, the housing 100 has a through hole 101 on the side wall opposite to the first receiving cavity 500, and a plug 800 opposite to the through hole 101 is connected to the outside of the housing 100. The positive electrode of the cylindrical battery cell 700 is electrically connected to the plug 800 through the through hole 101 via a wire harness.

[0069] The connector 800 is configured to be electrically connected to the vehicle's low-voltage electrical appliances via a wiring harness.

[0070] In the above embodiments, it should be noted that the battery pack is an integrated component. By providing through holes 101 and connectors 800, the cylindrical battery cell 700 can be easily connected to low-voltage electrical appliances without disassembling the housing 100, thus facilitating the power output of the cylindrical battery cell 700.

[0071] To further improve the energy density of the low-voltage power module 300, multiple cylindrical cells 700 are used, stacked together or connected in series. This increases the electrical energy stored in the low-voltage power module 300.

[0072] In one possible implementation, the battery pack further includes a signal acquisition module 910 disposed within the first receiving cavity 500 and located to the side of the cell assembly 200.

[0073] The signal acquisition module 910 is configured to acquire the status information of the cell assembly 200; the signal acquisition module 910 is electrically connected to the battery control module 400.

[0074] As one possible approach, the signal acquisition module 910 is used to acquire status information such as the current, voltage, and temperature of the battery cell assembly 200.

[0075] Of course, the signal acquisition module 910 can also acquire other necessary status information of the cell assembly 200. By setting the signal acquisition module 910, the status information of the cell assembly 200 can be obtained in a timely manner.

[0076] This facilitates monitoring of the battery cell assembly 200, enabling timely adjustment and maintenance of the battery cell assembly 200.

[0077] In one possible implementation, the battery pack also includes a thermal management module comprising a plurality of cold plates 920, a portion of which is configured to dissipate heat from the cell assembly 200.

[0078] Here, refer to Figure 1 and Figure 2 The cold plate 920 for heat dissipation of the cell assembly 200 is partially embedded inside the cell assembly 200 so that both opposite surfaces of the cold plate 920 dissipate heat from the cell assembly 200, which helps to improve heat dissipation efficiency.

[0079] At least one of the plurality of cold plates 920 is disposed opposite to the low-voltage power module 300 and is configured to dissipate heat from the low-voltage power module 300.

[0080] The cooling plate 920 for heat dissipation of the cylindrical battery cell 700 is disposed in the second receiving cavity 600, preferably disposed at the bottom of the second receiving cavity 600 and opposite to the cylindrical battery cell 700, and abuts against the cylindrical battery cell 700 to dissipate heat from the cylindrical battery cell 700.

[0081] In the above embodiments, by setting the cold plate 920, the working efficiency of the battery cell assembly 200 and the low-voltage power module 300 can be improved, and the high temperature can be avoided from affecting their normal operation.

[0082] In one possible implementation, an explosion-proof valve 930 is provided on the side of the housing 100 opposite to the second receiving cavity 600; an exhaust gap 501 is provided between the battery cell assembly 200 and the inner wall of the first receiving cavity 500. Specifically, an exhaust gap 501 is provided between the inner wall of the first receiving cavity 500 and each battery cell assembly 200, as shown in the figure. Figure 1 and Figure 2 As shown in L, the exhaust gap 501 can be understood to mean that the exhaust gap 501 is present in the circumferential direction of the inner wall of the first receiving cavity 500.

[0083] In the above embodiments, the explosion-proof valve 930 can effectively prevent the battery pack from exploding due to excessive internal pressure in the housing 100, thereby protecting the safety of the vehicle and personnel and further improving safety.

[0084] By setting the venting gap 501, the deformation of the housing 100 can be prevented from being affected by changes in the internal pressure of the cell assembly 200, which helps to improve the safety of the battery pack.

[0085] In one possible implementation, the battery control module 400 includes a control motherboard (not shown in the figure) and a relay (not shown in the figure) electrically connected to the control motherboard. The relay is electrically connected to the low-voltage power module 300 to control the charging and discharging of the low-voltage power module 300. In addition, multiple relays can be provided, and other relays can also be electrically connected to the battery cell assembly 200. Through the above-mentioned arrangement, it is possible to further facilitate the control of the charging and discharging process of the battery cell assembly 200 and the low-voltage power module 300, thereby improving convenience.

[0086] In addition, in one possible implementation, this application embodiment also provides a vehicle, including a vehicle body and the aforementioned battery pack; the battery pack is disposed on the vehicle body.

[0087] The vehicle can be any of the following: electric truck, electric bus, electric train, etc. This application embodiment does not limit the vehicle.

[0088] In the above embodiments, the specific structure of the battery pack has been described above and will not be elaborated here. Vehicles equipped with the above-mentioned battery pack can solve the problem of low-voltage loads in certain application scenarios being unable to be powered.

[0089] The implementation principle of a battery pack and vehicle according to an embodiment of this application is as follows: The battery pack includes a housing 100, a cell assembly 200, a low-voltage power module 300, and a battery control module 400; the housing 100 has a first receiving cavity 500 and a second receiving cavity 600 arranged along a first direction, the cell assembly 200 is disposed in the first receiving cavity 500, and the low-voltage power module 300 and the battery control module 400 are both disposed in the second receiving cavity 600; the cell assembly 200 and the low-voltage power module 300 are respectively electrically connected to the battery control module 400, and the battery control module 400 is configured to control the charging and discharging of the cell assembly 200 and the low-voltage power module 300 respectively; the low-voltage power module 300 is configured to supply power to the low-voltage electrical appliances of the vehicle.

[0090] By incorporating a low-voltage power module 300 within the battery pack and utilizing it to supply power to the vehicle's low-voltage electrical appliances, it is understood that even if the battery cell assembly 200 malfunctions and is unable to supply power to the low-voltage electrical appliances, the low-voltage power module 300 can still supply power to the vehicle's low-voltage electrical appliances, ensuring their normal operation and improving the user experience.

[0091] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein.

[0092] The embodiments in this application are intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed in this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0093] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A battery pack, characterized by, The battery pack for a vehicle comprises a shell (100), an electric cell assembly (200), a low-voltage power module (300) and a battery control module (400); the shell (100) has a first accommodating cavity (500) and a second accommodating cavity (600) arranged along a first direction, the electric cell assembly (200) is arranged in the first accommodating cavity (500), and the low-voltage power module (300) and the battery control module (400) are both arranged in the second accommodating cavity (600). The electric cell assembly (200) and the low-voltage power module (300) are electrically connected with the battery control module (400) respectively, and the battery control module (400) is configured to control the electric cell assembly (200) and the low-voltage power module (300) to charge and discharge respectively; the low-voltage power module (300) is configured to supply power to low-voltage electrical appliances of the vehicle.

2. The battery pack of claim 1, wherein, The low-voltage power module (300) and the battery control module (400) are arranged along a second direction in the second accommodating cavity (600), and the second direction is perpendicular to the first direction.

3. The battery pack of claim 1, wherein, The low-voltage power module (300) comprises at least one cylindrical electric cell (700), and the cylindrical electric cell (700) is transversely arranged in the second accommodating cavity (600); a positive electrode of the cylindrical electric cell (700) is configured to be electrically connected with the low-voltage electrical appliances of the vehicle, and a negative electrode of the cylindrical electric cell (700) is electrically connected with the shell (100).

4. The battery pack of claim 3, wherein, A through hole (101) is arranged on a side wall of the shell (100) away from the first accommodating cavity (500), an insertion piece (800) is connected to an outer side of the shell (100) and opposite to the through hole (101), and a positive electrode of the cylindrical electric cell (700) is electrically connected with the insertion piece (800) through a wire harness passing through the through hole (101); the insertion piece (800) is configured to be electrically connected with the low-voltage electrical appliances of the vehicle through a wire harness.

5. The battery pack of claim 3, wherein, The cylindrical electric cell (700) is a plurality of cylindrical electric cells (700) arranged in a stack; the plurality of cylindrical electric cells (700) are connected in series.

6. The battery pack of any one of claims 1-5, wherein, The battery pack further comprises a signal acquisition module (910) arranged in the first accommodating cavity (500) and located beside the electric cell assembly (200); the signal acquisition module (910) is configured to acquire state information of the electric cell assembly (200); and the signal acquisition module (910) is electrically connected with the battery control module (400).

7. The battery pack of any one of claims 1-5, wherein, The battery pack further comprises a thermal management module comprising a plurality of cold plates (920), part of the plurality of cold plates (920) is configured to dissipate heat of the electric cell assembly (200); and at least one of the plurality of cold plates (920) is arranged opposite to the low-voltage power module (300) and configured to dissipate heat of the low-voltage power module (300).

8. The battery pack of any one of claims 1-5, wherein, An explosion-proof valve (930) is arranged on the shell (100); an exhaust gap (501) is arranged between the electric cell assembly (200) and the inner wall of the first accommodating cavity (500).

9. The battery pack of any one of claims 1-5, wherein, The battery control module (400) comprises a control mainboard and a relay electrically connected with the control mainboard, and the relay is electrically connected with the low-voltage power module (300) to control the charging and discharging of the low-voltage power module (300).

10. A vehicle characterized by comprising: The vehicle comprises a vehicle body and the battery pack according to any one of claims 1-9; the battery pack is arranged on the vehicle body.

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