Battery pack and electric device

Abstract

The utility model discloses a battery pack and electric equipment, and relates to the technical field of batteries. The box body comprises a bearing box and a box cover connected with the bearing box, the arrangement direction of the bearing box and the box cover is a first direction, and the bearing box and the box cover define a containing cavity. The battery monomer assembly is located in the containing cavity and installed on the bearing box. The battery management system is installed on the bearing box, the arrangement direction of the battery management system and the battery single body assemblies is a second direction perpendicular to the first direction, and the battery management system is provided with a first end and a second end opposite to the first end in the second direction. The second end is located between the first end and the box cover in the first direction so that the battery management system can be obliquely arranged. The second end of the battery management system is located between the first end and the box cover in the first direction. The battery management system is obliquely arranged, so that the protruding space of the battery monomer assembly can be fully utilized, and the volume energy density of the battery pack is increased.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery pack and an electrical device. Background Art

[0002] New energy batteries are being used more and more widely in life and industries. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly applied in the energy storage field and so on.

[0003] In related technologies, the volumetric energy density of the battery pack is relatively low. Summary of the Utility Model

[0004] To solve the above technical problems, this application provides a battery pack and an electrical device to improve the volumetric energy density of the battery pack.

[0005] This application is implemented through the following technical solutions.

[0006] In the first aspect of the embodiments of this application, a battery pack is provided. The battery pack includes:

[0007] A box body, including a carrier box and a box cover connected to the carrier box. The arrangement direction of the carrier box and the box cover is the first direction, and the carrier box and the box cover enclose an accommodation cavity;

[0008] A battery cell assembly, located in the accommodation cavity. The battery cell assembly is installed on the carrier box, and the battery cell assembly includes one or at least two battery cells;

[0009] A battery management system, installed on the carrier box. The arrangement direction of the battery management system and the battery cell assembly is the second direction perpendicular to the first direction. The battery management system has a first end and a second end arranged opposite to the first end along the second direction. The second end is located between the first end and the box cover along the first direction so that the battery management system is inclined.

[0010] In the solution of the embodiments of this application, the arrangement direction of the carrier box and the box cover is the first direction, the arrangement direction of the battery management system and the battery cell assembly is the second direction perpendicular to the first direction, and the second end of the battery management system is located between the first end and the box cover along the first direction. The battery cell assembly is located in the accommodation cavity enclosed by the carrier box and the box body. Usually, the battery cell assembly will protrude from the carrier box to a certain extent. The battery management system is inclined, which can make more full use of the space protruding from the battery cell assembly, leave a part of the installation space along the second direction for other components inside the battery pack, increase the space utilization rate, thereby increasing the volumetric energy density of the battery pack, and the integration degree of the battery pack is relatively high.

[0011] In one embodiment, the carrier box includes:

[0012] A main box connected to the box cover, the main box and the box cover enclose the accommodating cavity, and the battery monomer assembly is installed in the main box;

[0013] The bracket is connected to the mounting wall on the side of the main box facing away from the box cover. The bracket has a guide surface. The distance between the guide surface and the mounting wall is a preset distance. The preset distance gradually increases or decreases along the direction of the bracket pointing to the battery monomer assembly. The battery management system is installed on the guide surface.

[0014] In the solution of the embodiment of the present application, the carrying box includes a main box and a bracket, the bracket is connected to the installation wall of the main box, the bracket has a guide surface, and the preset distance between the guide surface and the installation wall gradually increases or decreases along the direction in which the bracket points to the battery monomer assembly. The battery management system is installed on the guide surface to reduce the manufacturing difficulty of the main box, and the main box does not need to set up a special installation space for installing the battery management system, and can reduce the impact of the battery management system on the vibration of the main box to a certain extent.

[0015] In one embodiment, the angle between the guide surface and the installation wall ranges from 0° to 90°.

[0016] In the solution of the embodiment of the present application, an angle is formed between the guide surface and the installation wall, which enables the battery management system located on the guide surface to be arranged tilted, so that the battery management system can utilize the space in the height direction.

[0017] In one embodiment, the angle between the guide surface and the mounting wall is in the range of 30° to 60°.

[0018] In the scheme of the embodiment of the present application, the angle between the guide surface and the mounting wall is within an appropriate range so that the bracket and the battery management system can make full use of the space from the top surface of the battery cell assembly toward the bottom surface of the main box in the first direction, and the size of the main box along the second direction can be as small as possible, thereby increasing the energy density of the battery pack.

[0019] In one embodiment, the second end is located between the first end and the battery cell assembly along the second direction, the second end of the battery management system has a wiring port, the battery pack also includes a first wiring harness electrically connected to the wiring port and the battery cell assembly, respectively, and the bracket also has a limit member located at the second end of the battery management system, and the limit member protrudes along the guide surface toward one side of the battery management system.

[0020] In the solution of the embodiment of the present application, the second end is located between the first end and the battery cell assembly along the second direction. The second end has a wiring port, and the first wire harness is electrically connected to the wiring port and the battery cell assembly respectively. The bracket has a limiting member located at the second end. The limiting member can play a certain limiting role on the battery management module, can relieve the situation that the battery management module is pulled towards the battery cell assembly by the first wire harness, and the battery management module and the bracket are more stable.

[0021] In one embodiment, the bracket includes:

[0022] A vertical plate, connected to the main box;

[0023] A support plate, both opposite sides of the support plate along the third direction are connected with the vertical plate. The third direction is perpendicular to the first direction and the second direction respectively. The guiding surface and the limiting member are both formed on the side of the support plate facing away from the vertical plate.

[0024] In the solution of the embodiment of the present application, the bracket includes a vertical plate and a support plate, and both opposite sides of the support plate and the vertical plate along the third direction are connected with the vertical plate. The overall structure of the bracket is simple and light in weight, which can reduce the overall weight of the battery pack to a certain extent and increase the energy density of the battery cell.

[0025] In one embodiment, the support plate further has a first folded edge located at the first end of the battery management system, and the first folded edge is located on the side of the guiding surface facing away from the battery management system.

[0026] In the solution of the embodiment of the present application, the support plate has a first folded edge located at the first end of the battery management system on the side of the guiding surface facing away from the battery management system. The first folded edge can strengthen the edge of the support plate, the support plate has a higher strength, and can stably support the battery management system. Moreover, the first folded edge is located on the side of the guiding surface facing away from the battery management system, which can relieve the situation of interference between the first folded edge and the battery management system.

[0027] In one embodiment, the vertical plate is formed with a connecting portion connected to the main box. The connecting portion is located at the end of the vertical plate facing away from the support plate. The connecting portion fits the main box, and the connecting portion extends along the side facing away from the battery management system.

[0028] In the solution of the embodiment of the present application, the vertical plate is formed with a connecting portion connected to the main box, and the connecting portion extends along the side facing away from the battery management system. The support plate is relatively fixed to the main box through the connecting portion of the vertical plate, and the connecting portion can make the support plate more stable during operation and relieve the situation that the support plate topples relative to the main box.

[0029] In one embodiment, the support plate is formed with a through hole, and the through hole is located in the guide surface. The support plate is also formed with a second folded edge, and the second folded edge is located in the circumference of the through hole.

[0030] In the solution of the embodiment of the present application, the support plate is formed with a through hole, and the second folded edge is located in the circumference of the through hole. The support plate is formed with a through hole to further reduce the weight of the bracket, thereby increasing the energy density of the battery pack. The support plate is formed with a second folded edge in the circumference of the through hole, which can increase the strength of the support plate, reduce the stress concentration in the circumference of the through hole, and the service life of the support plate is relatively high.

[0031] In one embodiment, the second end is located between the first end and the battery cell assembly along the second direction, the second end of the battery management system has a wiring port, the opening direction of the wiring port is arranged crosswise with the second direction, and the battery pack also includes a first wiring harness electrically connected to the wiring port and the battery cell assembly respectively.

[0032] In the solution of the embodiment of the present application, the second end is located between the first end and the battery cell assembly along the second direction, the second end has a wiring port, the opening direction of the wiring port is arranged crosswise with the second direction, and the first wiring harness is electrically connected to the wiring port and the battery cell assembly respectively. The opening direction of the wiring port is arranged obliquely, which can alleviate the need for the first wiring harness to bend at a large angle during the wiring process of the first wiring harness, and the wiring method is simple. In addition, when the first wiring harness is connected, the stress on the first wiring harness is small, and the service life of the first wiring harness is long.

[0033] In one embodiment, the angle between the opening direction of the connection port and the second direction is in the range of 30° to 60°.

[0034] In the solution of the embodiment of the present application, the angle between the opening direction of the wiring port and the second direction is within a suitable range, which can effectively reduce the wiring difficulty of the first wiring harness.

[0035] In one embodiment, along the opening direction of the wiring port, the distance between the wiring port and the box cover ranges from 10 mm to 50 mm.

[0036] In the solution of the embodiment of the present application, along the opening direction of the wiring port, the distance between the wiring port and the box cover is within a suitable range to alleviate the need for the first wiring harness to bend at a larger angle to be electrically connected to the wiring port.

[0037] In one embodiment, the surface of the battery cell assembly closest to the box cover along the first direction is a preset surface, and the battery management system is located on a side of the preset surface away from the box cover along the first direction.

[0038] In the solution of the embodiment of the present application, the battery management system is located on the side of the preset surface away from the box cover along the first direction. The battery management system can fully utilize the side of the preset surface away from the box cover to minimize the space waste of the accommodating cavity. And it alleviates the waste of space for arranging battery monomer components due to the excessive size of the battery management system along the first direction.

[0039] In one embodiment, the battery pack further includes a first charging interface, a bus and at least two lifting ears, the lifting ear and the first charging interface are both connected to the carrying box, the first charging interface passes through the side wall of the carrying box, the bus is electrically connected to the battery cell assembly and the first charging interface, respectively, the carrying box has a first surface, a second surface and a third surface on the side facing the box cover along the first direction, the first surface is flush with the surface of the lifting ear on the side facing the box cover along the first direction, the projection area of ​​the second surface along the first direction partially overlaps with the projection area of ​​the first charging interface along the first direction, the second surface is located on the side of the first surface facing the box cover along the first direction, and the third surface is connected to the first surface and the second surface, respectively.

[0040] In the solution of the embodiment of the present application, the projection area of ​​the second surface along the first direction partially overlaps with the projection area of ​​the first charging port along the first direction, and the second surface is located on the side of the first surface facing the box cover along the first direction. The carrying box is partially raised along the first direction to form the second surface, which can better accommodate the first charging port, and the manufacturing difficulty of the box is relatively low. Furthermore, the partial protrusion of the carrying box can reduce the overall weight of the box to a certain extent, and the energy density of the battery pack is relatively high.

[0041] Utility Model Effect

[0042] The arrangement direction of the carrying box and the box cover of the embodiment of the present application is a first direction, the arrangement direction of the battery management system and the battery cell assembly is a second direction perpendicular to the first direction, and the second end of the battery management system is located between the first end and the box cover along the first direction. The battery cell assembly is located in the accommodating cavity surrounded by the carrying box and the box body. The battery cell assembly usually protrudes from the carrying box to a certain extent. The battery management system is arranged obliquely, which can fully utilize the protruding space of the battery cell assembly, leaving a part of the installation space for other components inside the battery pack, increasing the space utilization rate, thereby increasing the energy density of the battery pack, and the battery pack has a high degree of integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Upon reading the following detailed description of the preferred embodiments, various other advantages and benefits will become apparent to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of the present application. Also, in all the drawings, the same reference numerals are used to represent the same components.

[0044] In the drawings:

[0045] Figure 1 is a schematic structural diagram of the battery pack according to an embodiment of the present application, showing the box cover in the figure;

[0046] Figure 2 is a schematic structural diagram of the battery pack according to an embodiment of the present application, showing the first charging port and the second charging port in the figure;

[0047] Figure 3 is a schematic structural diagram of the battery pack according to an embodiment of the present application, with the box cover not shown in the figure;

[0048] Figure 4 is a schematic structural diagram of the main box according to an embodiment of the present application;

[0049] Figure 5 is a schematic structural diagram of the bracket according to an embodiment of the present application;

[0050] Figure 6 is Figure 5 a sectional view taken along the position A-A in;

[0051] Figure 7 is an assembly schematic diagram of the bracket and the main box according to an embodiment of the present application;

[0052] Figure 8 is Figure 7 a partial enlarged view at position B in.

[0053] Description of Reference Numerals

[0054] 1. Box body; 1a. Accommodating cavity; 10. Carrier box; 10a. Mounting wall; 10b. First surface; 10c. Second surface; 10d. Third surface; 100. Main box; 101. Bracket; 101a. Guiding surface; 101b. Limiting member; 1010. Vertical plate; 1010a. Connecting portion; 1011. Support plate; 1011a. First folded edge; 1011b. Through hole; 1011c. Second folded edge; 11. Box cover; 2. Battery cell assembly; 2a. Preset surface; 3. Battery management system; 3a. First end; 3b. Second end; 3c. Wiring port; 4. First wire harness; 5. First charging interface; 6. Busbar; 7. Lifting lug; 8. Second charging interface; 9. Second wire harness. Detailed Embodiments

[0055] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above description of the drawings are intended to cover non-exclusive inclusion.

[0057] In the description of the embodiments of this application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "a plurality" is more than two, unless otherwise specifically and clearly defined.

[0058] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0059] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0060] In the description of the embodiments of this application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0061] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense. It can be direct contact, or contact through an intermediate medium layer. It can be contact where there is basically no mutual force between the two contacting objects, or contact where there is a mutual force between the two contacting objects.

[0062] In the related art, the battery management system of the battery pack is installed in the carrying box. The battery management system has a first end and a second end arranged opposite to the first end along a second direction. The distances between the first end and the second end and the carrying box along a first direction are equal, and the battery cell assembly and the battery management system are arranged along the second direction. The battery management system is installed flat, occupying a relatively large space in the carrying box along the second direction, resulting in a low volume energy density of the battery pack.

[0063] In the embodiments of the present application, by arranging the second end 3b between the first end 3a and the box cover 11 along the first direction to make the battery management system 3 inclined, the space in the first direction is utilized more fully, thereby leaving installation space for other components in the battery pack along the second direction and improving the volume energy density of the battery pack.

[0064] The battery pack mentioned in the embodiments of the present application may include one or more battery cell assemblies 2 for providing voltage and capacity. The battery cell assembly 2 (Battery Cell Assembly) may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel or in a hybrid connection through a busbar component.

[0065] In some embodiments, the battery cell assembly 2 (Battery Cell Assembly) is usually formed by arranging a plurality of battery cells. As an example, the battery cell assembly 2 can be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with cable ties.

[0066] As an example, the battery cell assembly 2 can be a battery module, and the battery cell assembly 2 can be accommodated in the box body 1 by fixing the battery module to the box body 1.

[0067] As an example, the battery cell assembly 2 can also be accommodated in the box body 1 by directly fixing a plurality of battery cells to the box body 1.

[0068] As an example, the box body 1 may include a first box body and a second box body. The first box body and the second box body are buckled so that a closed space is formed inside the box body to accommodate the battery cell assembly 2. The "closed" here means covered or closed, which can be sealed or non-sealed. The first box body can be a top cover or a bottom plate.

[0069] As an example, the housing 1 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the housing 1 to accommodate the battery cell assembly 2.

[0070] As an example, the housing 1 can be part of the chassis structure of a vehicle. For example, the top cover of the housing 1 can become at least part of the floor of the vehicle, or the frame of the housing 1 can become at least part of the cross beams and longitudinal beams of the vehicle.

[0071] The technical solutions described in the embodiments of this application are applicable to various electrical devices using battery cells and battery packs. For example, mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0072] For the electrical device of the embodiment of this application, the electrical device may include a device main body and a power supply device. The power supply device is used to supply power to the device main body, and the power supply device may include a battery cell or a battery pack.

[0073] The device main body refers to the main body structure that consumes electrical energy to achieve corresponding functions. For example, the electrical device can be a mobile phone, and the device main body is the part that can achieve functions such as communication. Power is supplied to the part that can achieve functions such as communication through a battery cell or a battery pack. For example, the electrical device can be a car, and the device main body is the part that can carry people and drive on the road. Power is supplied to the part that can carry people and drive on the road through a battery cell or a battery pack.

[0074] The power supply device refers to a device that can output electrical energy. Exemplarily, electrical energy can be output through a battery cell. Exemplarily, electrical energy can be output through a battery pack composed of battery cells. Exemplarily, electrical energy can be output through a battery module composed of battery cells.

[0075] Taking the electrical device of an embodiment of this application as a vehicle as an example for illustration.

[0076] The vehicle provided by an embodiment of this application can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery pack is arranged inside the vehicle, and the battery pack can be arranged at the bottom, head, or tail of the vehicle. The battery pack can be used for power supply of the vehicle. For example, the battery pack can be used as the operating power source of the vehicle. The vehicle may further include a controller and a motor, and the controller can be used to control the battery pack to supply power to the motor. For example, the battery pack can be used for the working power requirements of the vehicle during startup, navigation, and driving.

[0077] In some embodiments of the present application, the battery pack can not only serve as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0078] A battery cell refers to the basic unit that can realize the mutual conversion between chemical energy and electrical energy.

[0079] In an embodiment of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging to continue to be used.

[0080] In an embodiment of the present application, the battery cell can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited thereto.

[0081] For the battery pack according to the embodiment of the present application, please refer to Figures 1 to 8 , the battery pack includes a box body 1, a battery cell assembly 2, and a battery management system 3. The box body 1 includes a carrier box 10 and a box cover 11 connected to the carrier box 10. The arrangement direction of the carrier box 10 and the box cover 11 is the first direction, and the carrier box 10 and the box cover 11 enclose an accommodation cavity 1a. The battery cell assembly 2 is located in the accommodation cavity 1a. The battery cell assembly 2 is installed on the carrier box 10, and the battery cell assembly 2 includes one or at least two battery cells. The battery management system 3 is installed on the carrier box 10. The arrangement direction of the battery management system 3 and the battery cell assembly 2 is the second direction perpendicular to the first direction. The battery management system 3 has a first end 3a and a second end 3b arranged opposite to the first end 3a along the second direction. The second end 3b is located between the first end 3a and the box cover 11 along the first direction so that the battery management system 3 is inclined.

[0082] The battery management system 3 refers to a system that is used for intelligent management and maintenance of each battery unit, monitors the state of the battery, and prevents the battery from overcharging and over-discharging to extend the service life of the battery.

[0083] The box body 1 refers to a structure for carrying the battery cell assembly, the battery management system 3, and other components.

[0084] Exemplarily, the first direction is as shown by the arrow R1 in Figure 4 .

[0085] Exemplarily, the second direction is as shown by the arrow R2 in Figure 3 .

[0086] In the solution of the embodiment of the present application, the arrangement direction of the carrier box 10 and the box cover 11 is the first direction, the arrangement direction of the battery management system 3 and the battery cell assembly 2 is the second direction perpendicular to the first direction, and the second end 3b of the battery management system 3 is located between the first end 3a and the box cover 11 along the first direction. The battery cell assembly 2 is located in the accommodation cavity 1a surrounded by the carrier box 10 and the box body 1. Usually, the battery cell assembly 2 protrudes from the carrier box 10 to a certain extent. The battery management system 3 is arranged obliquely, which can make full use of the space protruded by the battery cell assembly 2, leave a part of the installation space along the second direction for other components inside the battery pack, increase the space utilization rate, thereby increasing the volume energy density of the battery pack, and the integration degree of the battery pack is relatively high.

[0087] In one embodiment, please refer to Figure 7 , the carrier box 10 includes a main box 100 and a bracket 101. The main box 100 is connected to the box cover 11, the main box 100 and the box cover 11 enclose an accommodation cavity 1a, and the battery cell assembly 2 is installed in the main box 100. The bracket 101 is connected to the installation wall 10a on the side of the main box 100 facing away from the box cover 11. The bracket 101 has a guiding surface 101a, and the distance between the guiding surface 101a and the installation wall 10a is a preset distance. The preset distance gradually increases or decreases along the direction of the bracket 101 pointing to the battery cell assembly 2, and the battery management system 3 is installed on the guiding surface 101a.

[0088] The bracket 101 refers to a structure for supporting the battery management system 3.

[0089] Exemplarily, the preset distance is as shown by the dimension D1 in Figure 8 .

[0090] In the solution of the embodiment of the present application, the carrier box 10 includes a main box 100 and a bracket 101. The bracket 101 is connected to the installation wall 10a of the main box 100. The bracket 101 has a guiding surface 101a, and the preset distance between the guiding surface 101a and the installation wall 10a gradually increases or decreases along the direction of the bracket 101 pointing to the battery cell assembly 2. Installing the battery management system 3 on the guiding surface 101a can reduce the manufacturing difficulty of the main box 100. The main box 100 does not need to set a special installation space for installing the battery management system 3, and can reduce the influence of the vibration of the main box 100 on the battery management system 3 to a certain extent.

[0091] It can be understood that the embodiment of the present application does not limit whether the bracket 101 is provided. Exemplarily, along the first direction, the main box 100 is recessed downward on the side facing away from the box cover 11 to form an installation space, and the battery management system 3 is installed in the main box 100, and the battery management system 3 is located in the installation space.

[0092] In one embodiment, the range of the included angle between the guiding surface 101a and the installation wall 10a is 0° to 90°.

[0093] Exemplarily, the included angle between the guiding surface 101a and the mounting wall 10a is 1°, 10°, 15°, 20°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 70°, 80°, 85°, or 90°.

[0094] In the solution of the embodiment of the present application, an included angle is formed between the guiding surface 101a and the mounting wall 10a, which can make the battery management system 3 located on the guiding surface 101a be arranged obliquely, so that the battery management system 3 can utilize the space in the height direction.

[0095] In one embodiment, the range of the included angle between the guiding surface 101a and the mounting wall 10a is 30° to 60°.

[0096] It can be understood that the included angle between the guiding surface 101a and the mounting wall 10a can be measured by a protractor in an environment of normal temperature and pressure.

[0097] In the solution of the embodiment of the present application, when the included angle between the guiding surface 101a and the mounting wall 10a is within a suitable range, the bracket 101 and the battery management system 3 can make the most of the space where the top surface of the battery cell assembly 2 faces the bottom surface of the main case 100 in the first direction, and the size of the main case 100 along the second direction can be minimized as much as possible, thereby increasing the energy density of the battery pack.

[0098] It can be understood that the embodiment of the present application does not limit the magnitude of the included angle between the guiding surface 101a and the mounting wall 10a.

[0099] In one embodiment, please refer to Figure 8 , the second end 3b is located between the first end 3a and the battery cell assembly 2 in the second direction. The second end 3b of the battery management system 3 has a wiring port 3c. The battery pack further includes a first wire harness 4 electrically connected to the wiring port 3c and the battery cell assembly 2 respectively. The bracket 101 further has a limiting member 101b located at the second end 3b of the battery management system 3. The limiting member 101b protrudes toward the battery management system 3 along the guiding surface 101a.

[0100] The wiring port 3c refers to a structure for connecting to a wiring harness.

[0101] The first wire harness 4 refers to a structure formed by bundling a plurality of power lines or signal lines.

[0102] It can be understood that the first wire harness 4 can be a power line or a signal line.

[0103] Exemplarily, a circular chamfer is formed at one end of the limiting member 101b away from the guiding surface 101a.

[0104] In the solution of the embodiment of the present application, the second end 3b is located between the first end 3a and the battery cell assembly 2 along the second direction. The second end 3b has a wiring port 3c. The first wire harness 4 is electrically connected to the wiring port 3c and the battery cell assembly 2 respectively. The bracket 101 has a limiting member 101b located at the second end 3b. The limiting member 101b can play a certain limiting role on the battery management module, can relieve the situation that the battery management module is pulled towards the battery cell assembly 2 by the first wire harness 4, and the battery management module and the bracket 101 are more stable.

[0105] It can be understood that the embodiment of the present application does not limit whether the bracket 101 forms a limiting member 101b.

[0106] In one embodiment, please refer to Figure 5 , the bracket 101 includes a vertical plate 1010 and a support plate 1011. The vertical plate 1010 is connected to the main box 100. The support plate 1011 is connected to the vertical plate 1010 on both opposite sides along the third direction. The third direction is perpendicular to the first direction and the second direction respectively. The guiding surface 101a and the limiting member 101b are both formed on the side of the support plate 1011 facing away from the vertical plate 1010.

[0107] Exemplarily, the vertical plate 1010 and the support plate 1011 are integrally formed.

[0108] In the solution of the embodiment of the present application, the bracket 101 includes a vertical plate 1010 and a support plate 1011. The support plate 1011 and the vertical plate 1010 are connected to the vertical plate 1010 on both opposite sides along the third direction. The overall structure of the bracket 101 is simple and light in weight, which can reduce the overall weight of the battery pack to a certain extent and increase the energy density of the battery cells.

[0109] It can be understood that the present application does not limit whether the bracket 101 is provided with a vertical plate 1010. Exemplarily, the shape of the support plate 1011 is block-shaped, and the support plate 1011 is connected to the main box 100.

[0110] In one embodiment, please refer to Figure 5 and Figure 6 , the support plate 1011 further has a first folded edge 1011a located at the first end 3a of the battery management system 3. The first folded edge 1011a is located on the side of the guiding surface 101a facing away from the battery management system 3.

[0111] Exemplarily, a circular chamfer is formed at one end of the first folded edge 1011a facing the battery management system 3.

[0112] In the solution of the embodiment of the present application, the support plate 1011 has a first folded edge 1011a at the first end 3a of the battery management system 3, and the first folded edge 1011a is located on the side of the guiding surface 101a away from the battery management system 3. The first folded edge 1011a can strengthen the edge of the support plate 1011, and the support plate 1011 has a relatively high strength and can stably support the battery management system 3. Moreover, since the first folded edge 1011a is located on the side of the guiding surface 101a away from the battery management system 3, the situation of interference between the first folded edge 1011a and the battery management system 3 can be alleviated.

[0113] It can be understood that the embodiment of the present application does not limit whether the support plate 1011 is formed with the first folded edge 1011a.

[0114] In one embodiment, please refer to Figures 5 to 8 , the vertical plate 1010 is formed with a connecting portion 1010a connected to the main box 100. The connecting portion 1010a is located at one end of the vertical plate 1010 away from the support plate 1011. The connecting portion 1010a is attached to the main box 100, and the connecting portion 1010a extends along the side away from the battery management system 3.

[0115] Exemplarily, the shape of the connecting portion 1010a is a rectangular plate.

[0116] In the solution of the embodiment of the present application, the vertical plate 1010 is formed with a connecting portion 1010a connected to the main box 100, and the connecting portion 1010a extends along the side away from the battery management system 3. The support plate 1011 is relatively fixed to the main box 100 through the connecting portion 1010a of the vertical plate 1010, and the connecting portion 1010a can make the support plate 1011 relatively stable during operation and alleviate the situation where the support plate 1011 topples relative to the main box 100.

[0117] It can be understood that the embodiment of the present application does not limit that the connecting portion 1010a extends along the side away from the battery management system 3. Exemplarily, the connecting portion 1010a extends along the side towards the battery management system 3.

[0118] In one embodiment, please refer to Figure 5 , the support plate 1011 is formed with a through hole 1011b, the through hole 1011b is located in the guiding surface 101a, and the support plate 1011 is further formed with a second folded edge 1011c, and the second folded edge 1011c is located on the circumference of the through hole 1011b.

[0119] In the solution of the embodiment of the present application, the support plate 1011 is formed with a through hole 1011b, and the second folded edge 1011c is located in the circumferential direction of the through hole 1011b. Forming the through hole 1011b in the support plate 1011 can further reduce the weight of the bracket 101, thereby increasing the energy density of the battery pack. The support plate 1011 is formed with a second folded edge 1011c in the circumferential direction of the through hole 1011b, which can increase the strength of the support plate 1011, reduce the stress concentration in the circumferential direction of the through hole 1011b, and the service life of the support plate 1011 is relatively high.

[0120] It can be understood that the embodiment of the present application does not limit whether the support plate 1011 is formed with a through hole 1011b.

[0121] In one embodiment, please refer to Figure 8 , the second end 3b is located between the first end 3a and the battery cell assembly 2 along the second direction. The second end 3b of the battery management system 3 has a wiring port 3c, and the opening direction of the wiring port 3c is arranged crosswise with the second direction. The battery pack further includes a first wire harness 4 electrically connected to the wiring port 3c and the battery cell assembly 2 respectively.

[0122] Exemplarily, the opening direction of the wiring port 3c is arranged crosswise with the first direction.

[0123] In the solution of the embodiment of the present application, the second end 3b is located between the first end 3a and the battery cell assembly 2 along the second direction. The second end 3b has a wiring port 3c, and the opening direction of the wiring port 3c is arranged crosswise with the second direction. The first wire harness 4 is electrically connected to the wiring port 3c and the battery cell assembly 2 respectively. The opening direction of the wiring port 3c is arranged obliquely, which can relieve the need for the first wire harness 4 to bend at a large angle during the wiring process of the first wire harness 4, and the wiring method is simple. Moreover, when the first wire harness 4 is wired, the stress on the first wire harness 4 is small, and the service life of the first wire harness 4 is long.

[0124] It can be understood that the embodiment of the present application does not limit that the opening direction of the wiring port 3c is arranged crosswise with the second direction. Exemplarily, the opening direction of the wiring port 3c is parallel to the second direction.

[0125] In one embodiment, the range of the included angle between the opening direction of the wiring port 3c and the second direction is 30° to 60°.

[0126] Exemplarily, the included angle between the opening direction of the wiring port 3c and the second direction is 30°, 35°, 40°, 45°, 50°, 55° or 60°.

[0127] It can be understood that the included angle between the opening direction of the wiring port 3c and the second direction can be measured by a protractor in an environment of normal temperature and pressure.

[0128] In the solution of the embodiment of the present application, the angle between the opening direction of the wiring port 3 c and the second direction is within a suitable range, which can effectively reduce the wiring difficulty of the first wiring harness 4 .

[0129] In one embodiment, please refer to Figure 8 Along the opening direction of the connection port 3c, the distance between the connection port 3c and the box cover 11 ranges from 10 mm to 50 mm.

[0130] Exemplarily, along the opening direction of the wiring port 3c, the distance between the wiring port 3c and the box cover 11 is 10 mm, 15 mm, 20 mm, 30 mm, 40 mm, 45 mm, or 50 mm.

[0131] It can be understood that, along the opening direction of the wiring port 3 c , the distance between the wiring port 3 c and the box cover 11 can be measured using a ruler under normal temperature and pressure.

[0132] For example, along the opening direction of the wiring port 3c, the distance between the wiring port 3c and the box cover 11 is as follows: Figure 7 Medium size D2 shown.

[0133] In the solution of the embodiment of the present application, along the opening direction of the wiring port 3c, the distance between the wiring port 3c and the box cover 11 is within a suitable range to alleviate the need for the first wiring harness 4 to bend at a larger angle to be electrically connected to the wiring port 3c.

[0134] It is understandable that the embodiments of the present application do not limit the distance between the wiring port 3 c and the box cover 11 along the opening direction of the wiring port 3 c.

[0135] In one embodiment, the surface of the battery cell assembly 2 closest to the box cover 11 along the first direction is the preset surface 2 a , and the battery management system 3 is located on a side of the preset surface 2 a away from the box cover 11 along the first direction.

[0136] Exemplarily, the preset surface 2 a is the surface of the battery cell assembly 2 that is farthest from the carrying box 10 .

[0137] In the solution of the embodiment of the present application, the battery management system 3 is located on the side of the preset surface 2a away from the box cover 11 along the first direction. The battery management system 3 can fully utilize the side of the preset surface 2a away from the box cover 11 to minimize the space waste of the accommodating cavity 1a. It also alleviates the waste of space for arranging the battery cell assembly 2 due to the excessive size of the battery management system 3 along the first direction.

[0138] It can be understood that the embodiments of the present application do not limit the battery management system 3 to be located on the side of the preset surface 2a away from the box cover 11 along the first direction. Exemplarily, along the first direction, the battery management system 3 is partially located on the side of the preset surface 2a facing the box cover 11.

[0139] In one embodiment, please refer to Figure 3 and Figure 4 , the battery pack further includes a first charging interface 5, a busbar 6, and at least two lugs 7. The lugs 7 and the first charging interface 5 are both connected to the carrier box 10. The first charging interface 5 penetrates through the side wall of the carrier box 10. The busbar 6 is electrically connected to the battery cell assembly 2 and the first charging interface 5 respectively. The side of the carrier box 10 facing the box cover 11 along the first direction has a first surface 10b, a second surface 10c, and a third surface 10d. The first surface 10b is flush with the surface of the lug 7 on the side facing the box cover 11 along the first direction. The projection area of the second surface 10c along the first direction partially overlaps with the projection area of the first charging interface 5 along the first direction. The second surface 10c is located on the side of the first surface 10b facing the box cover 11 along the first direction. The third surface 10d is connected to the first surface 10b and the second surface 10c respectively.

[0140] The busbar 6 refers to a conductive component used to connect battery cells. Its main function is to connect battery cells in series or parallel during the manufacturing process of energy storage batteries to meet the voltage and capacity requirements of different battery packs.

[0141] The lug 7 refers to a structure used to hang the box body 1.

[0142] Exemplarily, the battery pack further includes a second charging interface 8. The second charging interface 8 penetrates through the side wall of the carrier box 10. When projected along the second direction, the projection area of the second charging interface 8 is smaller than the projection area of the first charging interface 5.

[0143] Exemplarily, the first charging interface 5 and the second charging interface 8 are located on the same side wall of the carrier box 10.

[0144] Exemplarily, the first charging interface 5 is a fast charging interface, and the second charging interface 8 is a slow charging interface.

[0145] Exemplarily, the battery pack further includes a second wire harness 9. The second wire harness 9 is electrically connected to the first charging interface 5 and the second charging interface 8 respectively.

[0146] In the solution of the embodiment of the present application, the projection area of the second surface 10c in the first direction partially overlaps with the projection area of the first charging port in the first direction, and the second surface 10c is located on the side of the first surface 10b facing the lid 11 in the first direction. The bearing box 10 is partially convex in the first direction to form the second surface 10c, which can better accommodate the first charging interface 5, and the manufacturing difficulty of the box body 1 is relatively low. Moreover, the partial convexity of the bearing box 10 can reduce the overall weight of the box body 1 to a certain extent, and the energy density of the battery pack is relatively high.

[0147] It can be understood that the embodiments of the present application are not limited to the bearing box 10 having the first surface 10b, the second surface 10c, and the third surface 10d in the first direction. Exemplarily, among the side walls of the bearing box 10 where the first charging port is located, only the second surface 10c exists.

[0148] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery pack, characterized in that, include: A box body, comprising a carrying box and a box cover connected to the carrying box, wherein the carrying box and the box cover are arranged in a first direction, and the carrying box and the box cover are arranged to form a receiving cavity; A battery cell assembly is located in the accommodating cavity, the battery cell assembly is installed in the carrying box, and the battery cell assembly includes one or at least two battery cells; A battery management system is installed on the supporting box, and the arrangement direction of the battery management system and the battery cell assembly is a second direction perpendicular to the first direction. The battery management system has a first end and a second end arranged opposite to the first end along the second direction, and the second end is located between the first end and the box cover along the first direction to make the battery management system arranged tilted.

2. The battery pack according to claim 1, characterized in that, The carrying box comprises: A main box connected to the box cover, the main box and the box cover enclose the accommodating cavity, and the battery monomer assembly is installed in the main box; The bracket is connected to the mounting wall on the side of the main box facing away from the box cover. The bracket has a guide surface. The distance between the guide surface and the mounting wall is a preset distance. The preset distance gradually increases or decreases along the direction of the bracket pointing to the battery monomer assembly. The battery management system is installed on the guide surface.

3. The battery pack according to claim 2, characterized in that, The included angle between the guide surface and the installation wall is in the range of 0° to 90°.

4. The battery pack according to claim 3, wherein, The included angle between the guide surface and the mounting wall is in the range of 30° to 60°.

5. The battery pack according to claim 2, characterized in that, The second end is located between the first end and the battery cell assembly along the second direction, the second end of the battery management system has a wiring port, the battery pack also includes a first wiring harness electrically connected to the wiring port and the battery cell assembly respectively, and the bracket also has a limit member located at the second end of the battery management system, and the limit member protrudes along the guide surface toward one side of the battery management system.

6. The battery pack according to claim 5, characterized in that, The support comprises: A vertical plate connected to the main box; A support plate, wherein the support plate is connected to the vertical plate on both opposite sides along a third direction, the third direction is respectively perpendicular to the first direction and the second direction, and the guide surface and the limit member are both formed on the side of the support plate away from the vertical plate.

7. The battery pack according to claim 6, characterized in that, The support plate further has a first folded edge located at a first end of the battery management system, and the first folded edge is located at a side of the guide surface facing away from the battery management system.

8. The battery pack according to claim 6, characterized in that, The vertical plate is formed with a connecting portion connected to the main box, the connecting portion is located at one end of the vertical plate away from the support plate, the connecting portion is attached to the main box, and the connecting portion extends along a side away from the battery management system.

9. The battery pack according to claim 6, wherein, The support plate is formed with a through hole, and the through hole is located in the guide surface. The support plate is also formed with a second folded edge, and the second folded edge is located in the circumference of the through hole.

10. The battery pack according to claim 1, characterized in that, The second end is located between the first end and the battery cell assembly along the second direction. The second end of the battery management system has a wiring port, and the opening direction of the wiring port is arranged crosswise with the second direction. The battery pack also includes a first wiring harness electrically connected to the wiring port and the battery cell assembly respectively.

11. The battery pack according to claim 6, characterized in that, The angle between the opening direction of the connection port and the second direction is in the range of 30° to 60°.

12. The battery pack according to claim 11, wherein, Along the opening direction of the wiring port, the distance between the wiring port and the box cover ranges from 10 mm to 50 mm.

13. The battery pack according to any one of claims 1 to 12, characterized in that, The surface of the battery cell assembly closest to the box cover along the first direction is a preset surface, and the battery management system is located on a side of the preset surface away from the box cover along the first direction.

14. The battery pack according to any one of claims 1 to 12, characterized in that, The battery pack also includes a first charging interface, a bus and at least two ears, the ear and the first charging interface are both connected to the carrying box, the first charging interface passes through the side wall of the carrying box, the bus is electrically connected to the battery cell assembly and the first charging interface, respectively, the carrying box has a first surface, a second surface and a third surface on the side facing the box cover along the first direction, the first surface is flush with the surface of the ear on the side facing the box cover along the first direction, the projection area of ​​the second surface along the first direction partially overlaps with the projection area of ​​the first charging interface along the first direction, the second surface is located on the side of the first surface facing the box cover along the first direction, and the third surface is connected to the first surface and the second surface, respectively.

15. An electrical device, characterized in that, include: Device body; The battery pack according to any one of claims 1 to 14 is used to supply power to a device body.

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