Battery pack and vehicle

Abstract

The utility model provides a battery pack and a vehicle. The battery pack comprises a box body, battery cells, expansion beams and connecting plates, the box body comprises a bottom plate and a frame. The frame is arranged on the peripheral side of the bottom plate in a surrounding mode and forms a containing space with the bottom plate. The battery cell is inversely arranged in the accommodating space, and the expansion beam is arranged on the peripheral side of the battery cell in a surrounding manner; the connecting plate is connected between the expansion beam and the frame, and a first mounting part for mounting an electronic device is arranged on the connecting plate. According to the battery pack disclosed by the utility model, the connecting plate is arranged between the expansion beam on the peripheral side of the battery cell and the frame of the box body, and the first mounting part for mounting the electronic device is arranged on the connecting plate, so that the space between the expansion beam on the peripheral side of the battery cell and the frame of the box body is effectively utilized; the problem that electronic devices are difficult to install and arrange due to small available space in the battery pack when the battery cells are inverted is solved, and meanwhile, the electric connection mode between the electronic devices and the battery cells and the control module is optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack assembly, in particular to a battery pack and a vehicle. Background Art

[0002] The battery pack is the core energy storage and supply device of the electric vehicle, which includes a battery pack box and multiple battery cells. The multiple battery cells are arranged in the battery pack box in a positive direction, that is, the poles of the battery cells are located at the upper part of the battery pack box, and an exhaust channel is reserved between the poles of the battery cells and the cover of the battery pack box to quickly discharge the high-temperature smoke from the battery pack in the event of thermal runaway of the battery cells, thereby preventing the battery pack from catching fire and exploding. At the same time, a protective space is provided between the battery cells and the bottom of the battery pack box, which can buffer the impact force on the battery pack box during the driving of the vehicle, thereby protecting the battery cells from damage.

[0003] Since the battery pack is large in size and occupies a lot of space inside the electric vehicle, it is not conducive to the lightweight design of the vehicle. For this reason, the solution of inverted battery cells has gradually appeared in the market. Inverted battery cells are placed with the battery cell poles facing the lower part of the battery pack body. After the battery cells are inverted, the same space can form an exhaust channel and serve as a protective space, thereby effectively reducing the height and volume of the battery pack. However, at the same time, inverted battery cells reduce the available space in the battery pack, which is not convenient for the layout of other electronic devices in the battery pack, nor is it convenient for the wiring between electronic devices and battery cells and control modules. Utility Model Content

[0004] In view of this, the utility model aims to provide a battery pack and a vehicle to solve the problem in the prior art that the internal space of the battery pack with inverted cells is small and inconvenient for the layout and routing of electronic devices.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] The utility model provides a battery pack, which includes a box body, a battery cell, an expansion beam and a connecting plate;

[0007] The box body comprises a bottom plate and a frame, wherein the frame is arranged around the circumference of the bottom plate and forms a containing space with the bottom plate;

[0008] The battery core is inverted in the accommodating space, and the expansion beam is arranged around the battery core;

[0009] The connecting plate is connected between the expansion beam and the frame, and a first mounting portion for mounting electronic components is provided on the connecting plate.

[0010] Further, the frame includes a first side beam, a second side beam and a third side beam, the connecting plate is connected between the expansion beam and the first side beam, and the second side beam and the third side beam are both adjacent to the first side beam;

[0011] The connecting plate extends in a direction parallel to the first side beam and is connected to the second side beam and the third side beam.

[0012] Furthermore, the expansion beam is provided with a second mounting portion for mounting electronic components.

[0013] Furthermore, the first mounting portion is a mounting hole, and the mounting hole passes through the connecting plate, and the second mounting portion is a mounting groove.

[0014] Furthermore, connection holes for fasteners to pass through are provided on the peripheral sides of the first mounting portion and the second mounting portion.

[0015] Further, the battery pack includes a high voltage adapter and a low voltage adapter;

[0016] The high-voltage adapter is installed on the first installation part, and the low-voltage adapter is installed on the second installation part, or the high-voltage adapter is installed on the second installation part, and the low-voltage adapter is installed on the first installation part.

[0017] Furthermore, the low-voltage adapter is an "L"-shaped structure, and a port of the low-voltage adapter close to one side of the bottom plate extends toward the frame to protrude from the surface of the expansion beam.

[0018] Furthermore, the box body also includes a cover plate, which is arranged on a side of the battery core away from the bottom plate and is adhesively connected to the battery core.

[0019] Furthermore, the battery pack also includes a control module;

[0020] The control module is arranged on the cover plate, and the cover plate is provided with a wire through hole for passing a wire harness. The wire harness of the control module passes through the wire through hole and is electrically connected to the high-voltage adapter and the low-voltage adapter.

[0021] The utility model also provides a vehicle, comprising the battery pack described in any one of the above items.

[0022] Compared with the prior art, the battery pack and vehicle described in the utility model have the following advantages:

[0023] The battery pack of the utility model is provided with a connecting plate between the expansion beam on the side of the battery cell and the frame of the box body, and the connecting plate is provided with a first mounting portion for mounting the electronic device, thereby effectively utilizing the space between the expansion beam on the side of the battery cell and the frame of the box body, solving the problem of difficulty in installing and arranging the electronic device due to the small available space in the battery pack when the battery cell is inverted. At the same time, the electronic device is installed between the expansion beam on the side of the battery cell and the frame of the box body, which also facilitates the electrical connection between the electronic device and the battery cell and the control module, thereby optimizing the electrical connection method between the electronic device and the battery cell and the control module.

[0024] The advantages of the vehicle and the above-mentioned battery pack over the prior art are the same and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0026] Figure 1 A top view of a battery pack according to an embodiment of the present utility model;

[0027] Figure 2 for Figure 1 Schematic diagram of the cross section along AA;

[0028] Figure 3 A top view of the interior of a battery pack according to an embodiment of the present utility model;

[0029] Figure 4 for Figure 3 A schematic cross-sectional view taken along BB in the middle;

[0030] Figure 5 It is a schematic diagram of a battery pack described in an embodiment of the utility model.

[0031] Description of reference numerals:

[0032] 11-bottom plate, 12-frame, 121-first side beam, 122-second side beam, 123-third side beam, 13-cover plate, 2-battery cell, 3-expansion beam, 30-second mounting portion, 4-connecting plate, 40-first mounting portion, 5-high-voltage adapter, 51-first port, 52-second port, 53-high-voltage connector, 6-low-voltage adapter, 61-first port, 62-second port, 63-low-voltage connector, 7-BMS module, 8-BDU module, 9-wire hole. DETAILED DESCRIPTION

[0033] It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. The described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The terms "first", "second", etc. in the specification and claims of the present utility model are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the utility model can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0035] It should be understood that the reference to "one embodiment" throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the utility model. Therefore, the "in one embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0037] Reference Figure 1 and Figure 2 The utility model provides a battery pack including a box body, a battery cell 2, an expansion beam 3 and a connecting plate 4; the box body includes a bottom plate 11 and a frame 12, the frame 12 is arranged around the side of the bottom plate 11 and forms a containing space with the bottom plate 11; the battery cell 2 is inverted in the containing space, and the expansion beam 3 is arranged around the side of the battery cell 2; the connecting plate 4 is connected between the expansion beam 3 and the frame 12, and the connecting plate 4 is provided with a first mounting portion 40 for mounting electronic devices.

[0038] Specifically, the box is a hard structure made of metal or alloy and has good strength and rigidity, and can play a certain protective role for the battery cell 2 and related electronic devices placed inside it. Figure 1 and Figure 2As shown, the box body includes a bottom plate 11 and a frame 12, and the frame 12 is arranged around the side of the bottom plate 11 and forms a containing space with the bottom plate 11, wherein the box body can be an integrally cast structure, that is, the bottom plate 11 and the frame 12 are an integral part, and the box body can also be a split assembly structure, and the connection between the bottom plate 11 and the frame 12 can be laser welding, fastener assembly connection, etc., and the specific connection method is not limited in this embodiment. There are multiple battery cells 2 in the battery pack, and the multiple battery cells 2 are placed in the containing space formed by the bottom plate 11 and the frame 12. Each battery cell 2 has a pole, and the poles of the multiple battery cells 2 are welded with the connecting piece to form a series-parallel circuit, and then electrically connected to the control module of the battery pack and the external electrical equipment through the electronic device. The charging and discharging function of the battery pack is essentially the charging and discharging of the battery cells 2 inside it.

[0039] Since the battery cell 2 will generate heat and expand irreversibly during operation, in order to prevent the battery cell 2 from over-expanding and affecting its stability, an expansion beam 3 is usually provided in the battery pack. The expansion beam 3 is arranged around the plurality of battery cells 2, and is actually arranged around the plurality of battery cells 2 located at the edge to maintain the stability of the battery cell 2. Since the plurality of battery cells 2 are usually arranged in a rectangular shape in the battery pack, the number of expansion beams 3 is at least four, and at least four expansion beams 3 are interconnected to form a rectangular frame, which is arranged around the battery cell 2. Of course, if the size of the battery cell 2 is larger, multiple expansion beams 3 can also be provided, and the specific number of expansion beams 3 is not limited in this embodiment. A certain expansion space can be reserved between the expansion beam 3 and the battery cell 2 to prevent the expansion of the battery cell 2 from excessively squeezing the expansion beam 3 and causing deformation and failure of the expansion beam 3. In addition, the expansion beam 3 can fix and position the battery cell 2 during the battery pack assembly process and provide support for the battery cell 2 to prevent the battery cell 2 from being damaged when encountering impact or collision. It can also conduct the heat generated by the battery cell 2 during the operation of the battery cell 2 to prevent the battery cell 2 from overheating, while achieving insulation isolation of the battery cell 2 to ensure the normal operation of the battery cell 2.

[0040] The battery cell 2 in the embodiment of the utility model is inverted in the accommodating space. The inverted battery cell 2 means that the pole of the battery cell 2 is placed toward the bottom plate 11 of the box body. Compared with the traditional battery cell 2 being placed upright, it is equivalent to flipping the battery cell 2 180° and placing it in the box body. After the battery cell 2 is inverted, the protective space between the bottom plate 11 of the box body and the battery cell 2 can also be used as an exhaust channel when the battery cell 2 is thermally runaway, thereby reducing the height of the battery pack and reducing the volume of the battery pack. However, at the same time, the inverted battery cell 2 reduces the available space between the battery cell 2 and the box body. Since the battery pack also includes other electronic devices for maintaining the normal operation of the battery cell 2, such as voltage adapters, connectors, etc., too small available space is not convenient for the layout of other electronic devices in the battery pack, and it is also not convenient for the electrical connection between the electronic devices and the battery cell 2 and the control module.

[0041] Based on this, Figure 2 As shown, the battery pack of the utility model also includes a connecting plate 4, which is arranged between the expansion beam 3 and the frame 12 of the box body, and is connected to the expansion beam 3 and the frame 12 respectively. The connection between the connecting plate 4 and the expansion beam 3 and the frame 12 can be achieved by laser welding, fastener assembly connection, etc., and the specific connection method is not limited in this embodiment. A first mounting portion 40 for mounting electronic devices is provided on the connecting plate 4. The setting of the connecting plate 4 effectively utilizes the space between the expansion beam 3 on the side of the battery cell 2 and the frame 12 of the box body, so that some electronic devices in the battery pack can be installed on the first mounting portion 40 of the connecting plate 4, thereby solving the problem that the small available space in the battery pack when the battery cell 2 is inverted leads to the difficulty in installing and arranging the electronic devices. At the same time, the electronic device is installed between the expansion beam 3 on the side of the battery cell 2 and the frame 12 of the box body, and the distance between it and the battery cell 2 is relatively close, so that the electrical connection between the electronic device and the battery cell 2 can be achieved by using a shorter wiring harness, which optimizes the electrical connection method between the electronic device and the battery cell 2. It should be noted that since the expansion beam 3 and the frame 12 are rectangular structures, the connecting plate 4 can be arranged between the expansion beam 3 and the frame 12 on one side of a control module, such as a BMS (Battery Management System) module or a BDU (Battery energy Distribution Unit) module, to facilitate electrical connection between the electronic devices on the connecting plate 4 and the control module.

[0042] In summary, the battery pack of the utility model is provided with a connecting plate 4 between the expansion beam 3 on the side of the battery cell 2 and the frame 12 of the box body, and the connecting plate 4 is provided with a first mounting portion 40 for mounting electronic devices, thereby effectively utilizing the space between the expansion beam 3 on the side of the battery cell 2 and the frame 12 of the box body, solving the problem of difficulty in installing and arranging electronic devices due to the small available space in the battery pack when the battery cell 2 is inverted. At the same time, the electronic devices are installed between the expansion beam 3 on the side of the battery cell 2 and the frame 12 of the box body, which also facilitates the electrical connection between the electronic devices and the battery cell 2 and the control module, thereby optimizing the electrical connection method between the electronic devices and the battery cell 2 and the control module.

[0043] Further, see Figure 3 and Figure 5 The frame 12 includes a first side beam 121, a second side beam 122 and a third side beam 123. The connecting plate 4 is connected between the expansion beam 3 and the first side beam 121. The second side beam 122 and the third side beam 123 are both adjacent to the first side beam 121. The connecting plate 4 extends in a direction parallel to the first side beam 121 and is connected to the second side beam 122 and the third side beam 123.

[0044] Specifically, the box body is usually a rectangular structure, so the frame 12 is composed of four side beams, and the four side beams can be fixedly connected to each other by welding or fastener assembly to form a complete rectangular frame 12. Figure 3 It is a partial top view of the internal structure of the battery pack, showing only three side beams, namely, the first side beam 121, the second side beam 122 and the third side beam 123. The connecting plate 4 is connected between the expansion beam 3 and the first side beam 121. The second side beam 122 and the third side beam 123 are both adjacent to the first side beam 121. Figure 3 As shown, the connecting plate 4 extends in a direction parallel to the first side beam 121, and the two ends of the connecting plate 4 are fixedly connected to the second side beam 122 and the third side beam 123 respectively, and the fixed connection method can also be welding or fastener assembly connection.

[0045] When the connecting plate 4 is connected to the expansion beam 3, the first side beam 121, the second side beam 122 and the third side beam 123 respectively, the connecting plate 4 divides the accommodation space between the expansion beam 3 and the frame 12 into two parts, the upper and lower directions, and the upper and lower directions refer to the height direction of the battery pack, that is, the direction perpendicular to the bottom plate 11. When assembling the battery pack, the electronic components of the upper part and the lower part can be assembled successively. For example, when assembling the battery pack, the control module of the upper part of the connecting plate 4, such as the BMS module 7, the BDU module 8 and the related wiring harness, can be assembled first, and then the battery pack is turned over to assemble the high-voltage adapter 5, the low-voltage adapter 6 and the related wiring harness of the lower part of the connecting plate 4. In addition, when the connecting plate 4 is connected to the expansion beam 3, the first side beam 121, the second side beam 122 and the third side beam 123 respectively, the connection reliability of the connecting plate 4 is higher, the stability is better, and it is more resistant to the collision of the battery pack, which can ensure the stability of the electronic components installed thereon.

[0046] Further, see Figure 4 The expansion beam 3 is provided with a second mounting portion 30 for mounting electronic components.

[0047] Specifically, if there are too many first mounting portions 40 on the connecting plate 4, the strength of the connecting plate 4 will be reduced, causing deformation and distortion of the connecting plate 4, which is not conducive to the structural stability of the battery pack. At the same time, if there are too many first mounting portions 40 on the connecting plate 4, the high-voltage adapter and the low-voltage adapter will be densely arranged, which will easily cause interference in subsequent wiring. For this reason, Figure 4 As shown, the embodiment of the utility model further provides a second mounting portion 30 for mounting electronic devices on the expansion beam 3, so as to make full use of the space between the expansion beam 3 and the frame 12, increase the mounting position of the electronic devices, and further improve the problem of difficult installation and layout of the electronic devices. In practical applications, those skilled in the art may consider whether to provide the second mounting portion 30 on the expansion beam 3 according to the number of electronic devices, the size of the connecting plate 4, etc.

[0048] Further, see Figure 4 The first mounting portion 40 is a mounting hole, and the mounting hole passes through the connecting plate 4, and the second mounting portion 30 is a mounting groove.

[0049] Specifically, since the electronic device needs to be electrically connected to the battery cell 2 and the control module, the control module is usually placed on the cover plate 13 of the battery pack box, and the side where the pole of the battery cell 2 is located after the battery cell 2 is inverted is located on the side close to the bottom plate 11 of the battery pack box, in order to facilitate the electrical connection between the electronic device and the battery cell 2 and the control module, such as Figure 4 As shown, the first mounting portion 40 on the connecting plate 4 is set as a mounting hole that penetrates the connecting plate 4. After the electronic device is installed in the mounting hole, one port of the electronic device is located at the upper part of the connecting plate 4, that is, located on the side of the connecting plate 4 away from the bottom plate 11, which is more convenient for electrical connection with the control module, and the other port of the electronic device is located at the lower part of the connecting plate 4, that is, located on the side of the connecting plate 4 close to the bottom plate 11, which is more convenient for electrical connection with the battery cell 2. Figure 4 As shown, the second mounting portion 30 on the expansion beam 3 is a mounting groove. The expansion beam 3 needs to support, fix and resist impact on the battery cell 2. Therefore, the strength and stiffness of the expansion beam 3 need to meet certain requirements to ensure that the expansion beam 3 can fully play its role. The second mounting portion 30 is a mounting groove, which does not penetrate the expansion beam 3. The depth of the mounting groove should not be set too deep, and it is sufficient to ensure the reliable installation of the electronic device.

[0050] Furthermore, connection holes for fasteners to pass through are provided on the circumference of the first mounting portion 40 and the second mounting portion 30 .

[0051] Specifically, connection holes for fasteners to be inserted can be provided on the peripheral side of the first mounting portion 40 on the connecting plate 4 and the peripheral side of the second mounting portion 30 on the expansion beam 3. The fasteners include but are not limited to screws, bolts, rivets, etc. After the electronic device is installed on the first mounting portion 40 or the second mounting portion 30, the fasteners are inserted into the connection holes on the electronic device and the connection holes on the peripheral sides of the first mounting portion 40 or the second mounting portion 30 to fix the electronic device in the first mounting portion 40 or the second mounting portion 30, thereby ensuring the installation reliability of the electronic device and avoiding the electronic device from falling off when the battery pack is hit.

[0052] Further, see Figure 3 and Figure 4 , the battery pack includes a high-voltage adapter 5 and a low-voltage adapter 6; the high-voltage adapter 5 is installed on the first mounting portion 40, and the low-voltage adapter 6 is installed on the second mounting portion 30, or, the high-voltage adapter 5 is installed on the second mounting portion 30, and the low-voltage adapter 6 is installed on the first mounting portion 40.

[0053] Specifically, if Figure 3 As shown, the battery pack includes a high-voltage adapter 5 and a low-voltage adapter 6. The high-voltage adapter 5 can provide transmission of about 60V to 380V or even higher voltage levels according to different usage scenarios. In the embodiment of the utility model, a high-voltage copper busbar adapter is selected. The high-voltage copper busbar adapter is made of high-quality copper material and has good conductivity. It can withstand large currents and is not easy to overheat, ensuring the stable transmission of electricity. At the same time, the resistance loss generated during current transmission is small, and it has good high temperature resistance and mechanical properties, and is easy to install and maintain. The low-voltage adapter 6 can provide transmission of about 14V or lower voltage levels according to different usage scenarios. The number of high-voltage adapters 5 is determined according to the connection requirements of the battery pack BDU module. In order to ensure the high-voltage transmission requirements, the number of high-voltage adapters 5 is usually at least six, and the specific number is not limited in this embodiment. The number of low-voltage adapters 6 is determined by the battery cells 2 arranged in the box. Each row of battery cells 2 needs to be connected to a low-voltage adapter 6, such as Figure 4 As shown in the figure, six rows of battery cells 2 are arranged in the box, so the number of low-voltage adapters 6 is six, and each low-voltage adapter 6 is electrically connected to a row of battery cells 2 to achieve voltage transmission of the row of battery cells.

[0054] like Figure 4 As shown, the high-voltage adapter 5 is installed on the first mounting portion 40 on the connecting plate 4, and the low-voltage adapter 6 is installed on the second mounting portion 30 on the expansion beam 3. Of course, in other embodiments, the high-voltage adapter 5 can also be installed on the second mounting portion 30 on the expansion beam 3, and the low-voltage adapter 6 can be installed on the first mounting portion 40 on the connecting plate 4. The high-voltage adapter 5 and the low-voltage adapter 6 are installed at different positions, which helps to distinguish the high-voltage adapter 5 and the low-voltage adapter 6 during the subsequent wiring process, prevents the problems of wrong connection and random connection, and is more conducive to the assembly of the battery pack. It should be noted that since most of the wiring harnesses of the BDU module need to be electrically connected to the high-voltage adapter 5, the low-voltage adapter 6 needs to be electrically connected to each row of battery cells respectively, and installing the high-voltage adapter 5 on the connecting plate 4 and the low-voltage adapter 6 on the expansion beam 3 will be more convenient for the electrical connection between the high-voltage adapter 5 and the BDU module and the electrical connection between the low-voltage adapter 6 and the battery cells. Therefore, the battery pack of the embodiment of the utility model adopts a method of installing the high-voltage adapter 5 on the first mounting part 40 on the connecting plate 4 and the low-voltage adapter 6 on the second mounting part 30 on the expansion beam 3.

[0055] like Figure 5 As shown, the battery pack also includes a high-voltage connector 53 and a low-voltage connector 63. The high-voltage connector 53 and the low-voltage connector 63 pass through the box body and are exposed to the outside of the battery pack. The high-voltage adapter 5 is electrically connected to the high-voltage connector 53, and the low-voltage adapter 6 is electrically connected to the low-voltage connector 63, thereby realizing the access of the high and low voltage lines of the battery pack.

[0056] Further, see Figure 4 The low-voltage adapter 6 is an “L”-shaped structure, and a port of the low-voltage adapter 6 close to the bottom plate 11 extends toward the frame 12 to protrude from the surface of the expansion beam 3 .

[0057] Specifically, if Figure 4 As shown, the low-voltage adapter 6 is an "L"-shaped structure, and includes a first port 61 on the side away from the bottom plate 11 and a second port 62 on the side close to the bottom plate 11. The first port 61 is located above the connecting plate 4 and is used to be electrically connected to the control module. The second port 62 extends toward the frame 12 to protrude from the surface of the expansion beam 3 and is used to be electrically connected to the battery cell 2. The second port 62 protrudes from the surface of the expansion beam 3, and the expansion beam 3 does not block the second port 62, thereby ensuring smooth connection between the low-voltage adapter 6 and the battery cell 2.

[0058] Further, see Figure 1 and Figure 5 The box body further includes a cover plate 13 , which is disposed on a side of the battery core 2 away from the bottom plate 11 and is adhesively connected to the battery core 2 .

[0059] Specifically, the cover plate 13 is arranged on the side of the battery cell 2 away from the bottom plate 11 and is adhesively connected to the battery cell 2. The connection method is simple and easy to operate. The cover plate 13 covers the accommodation space formed by the bottom plate 11 and the frame 12 to prevent external water vapor, dust, etc. from entering the accommodation space to affect the performance of the battery cell 2, thereby ensuring the safe use of the battery cell 2.

[0060] Further, see Figure 5 The battery pack also includes a control module; the control module is arranged on the cover plate 13, and the cover plate 13 is provided with a wire hole 9 for passing a wiring harness, and the wiring harness of the control module passes through the wire hole 9 and is electrically connected to the high-voltage adapter 5 and the low-voltage adapter 6.

[0061] Specifically, the control module is arranged on the cover plate 13 and is fixedly connected to the cover plate 13 by fasteners to ensure the connection reliability of the control module and prevent the control module from being separated from the cover plate 13 when the battery pack is hit. The control module is assembled and connected to the cover plate 13. When the control module fails, it is convenient to remove the control module from the cover plate 13 for inspection and maintenance. The cover plate 13 is provided with a wire hole 9 for passing the wire harness. The shape and size of the wire hole 9 can be set according to the position of the wire harness of the control module. Figure 5 The wire hole 9 shown in the figure is a strip-shaped hole. The wiring harness of the control module passes through the wire hole 9 and is electrically connected to the high-voltage adapter 5 on the connecting plate 4 and the low-voltage adapter 6 on the expansion beam 3, thereby achieving electrical connection with the battery cell 2 through the high-voltage adapter 5 and the low-voltage adapter 6.

[0062] In practical applications, the control module includes a BMS module 7 and a BDU module 8. The BMS module 7 is mainly used for intelligent monitoring, management and maintenance of each battery unit composed of multiple battery cells 2, to prevent the battery unit from being overcharged or over-discharged, and to extend the service life of the battery unit. The BDU module 8 is an important accessory in the high-voltage circuit of an electric vehicle, and controls the power-on and power-off process, pre-charging process and charging process of the high-voltage electrical circuit. When connected, the sampling harness of the BMS module 7 and the BDU module 8 is electrically connected to the first port 61 of the low-voltage adapter 6, and the second port 62 of the low-voltage adapter 6 is electrically connected to the battery cell 2, thereby realizing the electrical connection between the sampling of the BMS module 7 and the BDU module 8 and the battery cell 2, and the other harnesses of the BDU module 8 are electrically connected to the first port 51 of the high-voltage adapter 5, and the second port 52 of the high-voltage adapter 5 is electrically connected to the battery cell 2, thereby realizing the electrical connection between the BDU module 8 and the battery cell 2.

[0063] The utility model also provides a vehicle, comprising the battery pack described in any one of the above items.

[0064] Specifically, the vehicle includes the battery pack described in any of the above items, and the battery pack adopts the method of inverting the battery cell 2, so that the overall volume of the battery pack is small, and the space inside the vehicle is small, which is convenient for the layout of other components inside the vehicle. At the same time, the battery pack can realize the effective installation of various electronic devices, and the overall structure is compact and highly reliable, providing guarantee for the power output of the vehicle.

[0065] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack, characterized in that: The battery pack includes a box body, a battery cell, an expansion beam and a connecting plate; The box body comprises a bottom plate and a frame, wherein the frame is arranged around the circumference of the bottom plate and forms a containing space with the bottom plate; The battery core is inverted in the accommodating space, and the expansion beam is arranged around the battery core; The connecting plate is connected between the expansion beam and the frame, and a first mounting portion for mounting electronic components is provided on the connecting plate.

2. The battery pack according to claim 1, characterized in that: The frame includes a first side beam, a second side beam and a third side beam, the connecting plate is connected between the expansion beam and the first side beam, and the second side beam and the third side beam are both adjacent to the first side beam; The connecting plate extends in a direction parallel to the first side beam and is connected to the second side beam and the third side beam.

3. The battery pack according to claim 1, characterized in that: The expansion beam is provided with a second mounting portion for mounting electronic components.

4. The battery pack according to claim 3, characterized in that: The first mounting portion is a mounting hole, and the mounting hole passes through the connecting plate, and the second mounting portion is a mounting groove.

5. The battery pack according to claim 3, characterized in that: The first mounting portion and the second mounting portion are provided with connection holes around their peripheries for fasteners to pass through.

6. The battery pack according to claim 4, characterized in that: The battery pack includes a high voltage adapter and a low voltage adapter; The high-voltage adapter is installed on the first installation part, and the low-voltage adapter is installed on the second installation part, or the high-voltage adapter is installed on the second installation part, and the low-voltage adapter is installed on the first installation part.

7. The battery pack according to claim 6, characterized in that: The low-voltage adapter is an "L"-shaped structure, and a port of the low-voltage adapter close to one side of the bottom plate extends toward the frame to protrude from the surface of the expansion beam.

8. The battery pack according to claim 6, characterized in that: The box body also includes a cover plate, which is arranged on a side of the battery core away from the bottom plate and is adhesively connected to the battery core.

9. The battery pack according to claim 8, characterized in that: The battery pack also includes a control module; The control module is arranged on the cover plate, and the cover plate is provided with a wire through hole for passing a wire harness. The wire harness of the control module passes through the wire through hole and is electrically connected to the high-voltage adapter and the low-voltage adapter.

10. A vehicle, characterized in that: A battery pack comprising any one of claims 1 to 9.

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