A battery pack, a battery system, and a vehicle

Abstract

The application provides a battery pack, a battery system and a vehicle, and particularly relates to the technical field of batteries. The battery pack comprises a battery module, an electrical management system and a battery box. The battery module comprises flexible circuit boards arranged side by side along a first direction, and the plug-in ends of the flexible circuit boards extend along a second direction. The electrical management system comprises a host, slaves, a battery disconnect unit, a high-voltage plug-in, a low-voltage plug-in and a high-voltage connecting row, the slaves are arranged side by side along a third direction, each slave is connected to the host, and the plug-in ends of the flexible circuit boards are plugged into the slaves. The battery disconnect unit is located on one side of the host, and the high-voltage connecting row is connected to the battery disconnect unit. The battery module and the electrical management system are both located in the battery box, and the high-voltage plug-in and the low-voltage plug-in are fixed to the outer lining of the battery box. By directly plugging the flexible circuit boards into the slaves, a certain amount of wire harness material is saved, the cost of the battery pack is reduced, the layout of the battery pack is more compact and beautiful, and the like.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery pack, a battery system, and a vehicle. Background Technology

[0002] With technological advancements and the booming development of the new energy industry, power batteries have been widely used in many fields, including electric vehicles, renewable energy storage, consumer electronics, and industrial equipment. Among these, the battery pack, as the core component of a power battery system, is currently the primary method for integrating power battery systems.

[0003] With the development of new energy vehicles, the performance of battery packs directly affects the vehicle's range, power performance, and safety. To improve the competitiveness of new energy vehicles, lightweighting, low cost, and high safety have become key objectives in battery pack design.

[0004] However, in existing vehicles, the battery module, as a secondary unit of the battery pack, needs to collect information from the cells within the module (such as voltage and temperature). Currently, flexible circuit boards and wiring harnesses are typically used for this information collection. The wiring harnesses then connect the module to the slave board in the battery management system. The use of flexible circuit boards and wiring harnesses increases material costs and, consequently, assembly complexity. Furthermore, the cumulative weight of the wiring harnesses within the entire battery pack can also hinder the achievement of weight reduction goals. Utility Model Content

[0005] This application provides a battery pack, a battery system, and a vehicle. By extending the plug-in terminals of the flexible circuit board in the battery module toward the electrical management system, the flexible circuit board can be directly plugged into and connected to the slave device in the electrical management system, thereby saving a certain amount of wiring harness material, effectively reducing the overall cost of the battery pack, and making the overall layout of the battery pack more compact and aesthetically pleasing.

[0006] The first aspect of this application provides a battery pack, comprising:

[0007] The battery module includes flexible circuit boards arranged side by side along a first direction, and the insertion ends of the flexible circuit boards extend along a second direction.

[0008] The electrical management system includes a host, slave, battery disconnect unit, high-voltage plug, low-voltage plug and high-voltage connection bus;

[0009] Multiple slave devices are arranged in parallel along a third direction, and each slave device is electrically connected to the master device. The plug-in terminals of the flexible circuit board are plugged into the slave devices.

[0010] The battery disconnect unit is located on the side of the main unit facing upwards, and the high-voltage connector is connected to the battery disconnect unit;

[0011] The battery housing, battery modules, and electrical management system are all located inside the battery housing, and the high-voltage and low-voltage plugs are fixed sequentially to the outer lining of the battery housing along the third direction.

[0012] The battery pack provided in the first aspect of this application includes a battery module, an electrical management system, and a battery housing. The battery module includes flexible circuit boards arranged in parallel along a first direction, with the insertion ends of the flexible circuit boards extending along a second direction. The electrical management system includes a master unit, slave units, a battery disconnect unit, high-voltage plug-in, low-voltage plug-in, and a high-voltage connection busbar. Multiple slave units are arranged in parallel along a third direction, and each slave unit is electrically connected to the master unit. The insertion ends of the flexible circuit boards are inserted into the slave units. The battery disconnect unit is located on the side of the master unit facing the third direction, and the high-voltage connection busbar is connected to the battery disconnect unit. Both the battery module and the electrical management system are located within the battery housing, and the high-voltage plug-in and low-voltage plug-in are sequentially fixed to the outer lining of the battery housing along the third direction. Thus, the battery pack provided in this application, by extending the insertion ends of the flexible circuit boards in the battery module towards the electrical management system, allows the flexible circuit boards to be directly plugged into and connected to the slave units in the electrical management system, thereby saving a certain amount of wiring harness material, effectively reducing the overall cost of the battery pack, and making the overall layout of the battery pack more compact and aesthetically pleasing.

[0013] In one possible implementation, the battery housing is made of carbon glass fiber composite material.

[0014] In one possible implementation, the battery module includes: a battery cell unit, wherein a plurality of battery cell units are arranged alternately along a first direction to form a continuous serpentine channel between adjacent columns of battery cell units;

[0015] The serpentine channel is a continuous wave-shaped channel formed by the alternating protrusions of the outer surfaces of adjacent rows of cell units.

[0016] In one possible implementation, the battery module further includes a first module housing, a second module housing, and a busbar, wherein the first module housing and the second module housing are respectively located on both sides of the cell unit in a second direction;

[0017] The first module housing has several first mounting holes, and the second module housing has several second mounting holes. One end of the battery cell is inserted into the first mounting hole, and the other end is inserted into the second mounting hole.

[0018] The busbar is fixedly connected to the side of the first module housing facing away from the battery cell unit, and the flexible circuit board is fixedly connected to the busbar.

[0019] In one possible implementation, it further includes: a thermal management system, which includes a plurality of cold plates extending along a first direction, and the cold plates are provided with flow channels;

[0020] The shape of the cold plate matches the serpentine channel so that the cold plate is inserted into the serpentine channel and contacts the outer surface of the adjacent cell unit.

[0021] In one possible implementation, the thermal management system further includes: an inlet assembly and an outlet assembly, both located on the same side of the cold plate in a first direction;

[0022] The liquid inlet assembly includes a liquid inlet pipe and a liquid inlet connector. The liquid inlet connector is connected to the end of the liquid inlet pipe. The liquid inlet pipe extends in a third direction and has several first connecting parts. The first connecting parts are connected to the cold plate so that the flow channel and the liquid inlet pipe are connected.

[0023] The liquid outlet assembly includes a liquid outlet pipe and a liquid outlet connector. The liquid outlet connector is connected to the end of the liquid outlet pipe. The liquid outlet pipe extends in a third direction and has several second connecting parts. The second connecting parts are connected to the cold plate so that the flow channel and the liquid outlet pipe are connected.

[0024] In one possible implementation, the electrical management system further includes: a battery disconnect unit, a high-voltage connector, a low-voltage connector, and a high-voltage connection busbar;

[0025] The battery disconnect unit is located on one side of the main unit and is used to disconnect the battery module from the electrical management system when needed.

[0026] The high-voltage plug is fixed to the outer liner of the battery box and is used to connect the high-voltage power supply to the battery disconnect unit;

[0027] The low-voltage plug is fixed to the outer liner of the battery box and is used to connect the low-voltage signal to the host and slave.

[0028] The high-voltage connector is connected between the high-voltage plug and the battery disconnect unit to transmit high-voltage current.

[0029] In one possible implementation, the electrical management system further includes: a first electrical support;

[0030] The first electrical bracket includes a mounting end and a protruding end. The mounting end abuts against the main unit, and the protruding end extends along a third direction and away from the main unit. The main unit is fixedly connected to the battery box through the protruding end.

[0031] In one possible implementation, the battery housing includes a support beam;

[0032] The support beam divides the battery box into a module cavity and an electrical cavity. The battery modules are located in the module cavity, and the electrical management system is located in the electrical cavity.

[0033] A second aspect of this application provides a battery system including the battery pack described above.

[0034] A third aspect of this application provides a vehicle including the aforementioned battery system.

[0035] It should be understood that the second and third aspects of this application correspond to the technical solutions of the first aspect of this application, and the beneficial effects achieved by each aspect and the corresponding feasible implementation are similar, and will not be repeated here.

[0036] In addition to the technical problems solved by this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions as described above, other technical problems that can be solved by a battery pack, battery system, and vehicle provided by this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific embodiments. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only a part of the embodiments of this application. These drawings and text descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A top view of the battery pack provided in an embodiment of this application;

[0039] Figure 2 An exploded view of the battery pack provided in an embodiment of this application;

[0040] Figure 3 This is an exploded view of the battery module of the battery pack provided in the embodiments of this application;

[0041] Figure 4 This is a schematic diagram of the electrical management system of the battery pack provided in the embodiments of this application;

[0042] Figure 5 This is a schematic diagram of the battery box structure of the battery pack provided in the embodiments of this application;

[0043] Figure 6 This is a top view of the battery module of the battery pack provided in the embodiments of this application;

[0044] Figure 7 This is a schematic diagram of the thermal management system of the battery pack provided in an embodiment of this application;

[0045] Figure 8A top view showing the battery module and thermal management system of the battery pack provided in the embodiments of this application;

[0046] Figure 9 This is a schematic diagram of the structure of the first electrical support for the battery pack provided in an embodiment of this application;

[0047] Figure 10 A schematic diagram of the structure of the battery pack main unit and the first electrical support unit in cooperation, provided in an embodiment of this application;

[0048] Figure 11 The diagram shows a schematic and a partial enlarged view of the battery box cover of the battery pack provided in the embodiments of this application.

[0049] Explanation of reference numerals in the attached figures:

[0050] 100-battery pack;

[0051] 200 - Battery module; 210 - Flexible circuit board; 211 - Connector; 220 - Cell unit; 221 - Serpentine channel; 230 - First module housing; 231 - First mounting hole; 232 - Positioning hole; 240 - Second module housing; 241 - Second mounting hole; 250 - Busbar; 260 - Protective cover; 270 - Module top cover;

[0052] 300 - Electrical Management System; 310 - Main Unit; 320 - Slave Unit; 321 - Interface; 330 - Battery Disconnection Unit; 340 - High Voltage Plug-in; 350 - Low Voltage Plug-in; 360 - High Voltage Connection Bar; 370 - First Electrical Bracket; 371 - Mounting End; 372 - Protruding End; 373 - Through Hole; 380 - Second Electrical Bracket;

[0053] 400-Battery housing; 410-Support beam; 411-Module cavity; 412-Electrical cavity; 420-Bottom guard plate; 430-Outer liner; 440-Inner liner; 450-Connecting piece; 460-Lifting lug; 470-Sealing plate;

[0054] 500 - Thermal management system; 510 - Cold plate; 511 - Flow channel; 520 - Liquid inlet assembly; 521 - Liquid inlet connector; 522 - Liquid inlet pipeline; 5221 - First connecting part; 530 - Liquid outlet assembly; 531 - Liquid outlet connector; 532 - Liquid outlet pipeline; 5321 - Second connecting part;

[0055] 600 - Battery box cover; 610 - Reinforcing rib; 620 - Assembly hole;

[0056] 700 - Seals;

[0057] 800-Explosion-proof valve. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0059] As described in the background section, in existing vehicles, the battery module, as a secondary unit of the battery pack, needs to collect information from the cells within the battery module (such as voltage and temperature). Currently, flexible circuit boards and wiring harnesses are commonly used for information collection. The wiring harnesses then connect the module to the slave board in the battery management system. The use of flexible circuit boards and wiring harnesses increases material costs and, consequently, assembly complexity. Furthermore, the cumulative weight of the wiring harnesses within the entire battery pack can also hinder the achievement of weight reduction goals.

[0060] To address the aforementioned technical problems, the first aspect of this application provides a battery pack. The battery pack includes a battery module, an electrical management system, and a battery housing. The battery module includes flexible circuit boards arranged in parallel along a first direction, with the insertion ends of the flexible circuit boards extending along a second direction. The electrical management system includes a master unit, slave units, a battery disconnection unit, high-voltage plug-in, low-voltage plug-in, and a high-voltage connection busbar. Multiple slave units are arranged in parallel along a third direction, and each slave unit is electrically connected to the master unit. The insertion ends of the flexible circuit boards are inserted into the slave units. The battery disconnection unit is located on the master unit's side in the third direction, and the high-voltage connection busbar is connected to the battery disconnection unit. Both the battery module and the electrical management system are located within the battery housing, and the high-voltage plug-in and low-voltage plug-in are sequentially fixed to the outer lining of the battery housing along the third direction. Thus, the battery pack provided by this application extends the insertion ends of the flexible circuit boards in the battery module towards the electrical management system, allowing the flexible circuit boards to be directly plugged into and connected to the slave units in the electrical management system. This eliminates the need for a certain amount of wiring harness material, effectively reducing the overall cost of the battery pack, and resulting in a more compact and aesthetically pleasing overall layout.

[0061] A second aspect of this application provides a battery system. The vehicle includes the aforementioned battery pack.

[0062] A third aspect of this application provides a vehicle. The vehicle includes the battery system described above.

[0063] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0064] This application provides a battery pack, a battery system, and a vehicle. By extending the plug-in terminals of the flexible circuit board in the battery module toward the electrical management system, the flexible circuit board can be directly plugged into and connected to the slave device in the electrical management system, thereby saving a certain amount of wiring harness material, effectively reducing the overall cost of the battery pack, and making the overall layout of the battery pack more compact and aesthetically pleasing. The specific structure of the battery pack, battery system, and vehicle provided in this application embodiment is described below with reference to the accompanying drawings.

[0065] refer to Figure 1 as well as Figure 2 This application provides a battery pack 100 in a first aspect. The battery pack 100 may include battery modules 200, an electrical management system 300, and a battery housing 400. In one possible implementation, the number of battery modules 200 can be plurality of, and this application embodiment does not limit the number of battery modules 200. In this application embodiment, both the battery modules 200 and the electrical management system 300 can be located within the battery housing 400.

[0066] refer to Figure 3 Based on the above embodiments, the battery module 200 may include a flexible circuit board 210. In one possible implementation, the number of flexible circuit boards 210 may be several; this application embodiment does not limit the number of flexible circuit boards 210. In this application embodiment, three flexible circuit boards 210 are used as an example. The three flexible circuit boards 210 can be arranged side-by-side along a first direction. One end of each flexible circuit board 210 in the first direction has a plug-in end 211, and the plug-in end 211 of the flexible circuit board 210 can be bent so that the plug-in end 211 of the flexible circuit board 210 extends along a second direction.

[0067] refer to Figure 4Based on the above embodiments, the electrical management system 300 may include a host 310 and slave devices 320. In one possible implementation, the number of slave devices 320 may be at least one; however, this application embodiment does not limit the number of slave devices 320. In this application embodiment, the number of slave devices 320 may be the same as the number of flexible circuit boards 210. Taking three slave devices 320 as an example, the three slave devices 320 may be arranged side-by-side along a third direction. Each slave device 320 has an interface 321, and the interface 321 corresponds to the insertion terminal 211 of the flexible circuit board 210, thereby allowing the insertion terminal 211 of the flexible circuit board 210 to be inserted into the slave device 320. It is understood that each slave device 320 can be electrically connected to the host 310.

[0068] In this way, by extending the plug-in end 211 of the flexible circuit board 210 in the battery module 200 toward the electrical management system 300, the flexible circuit board 210 can be directly plugged into and connected to the slave device 320 in the electrical management system 300, thereby saving a certain amount of wiring harness material and effectively reducing the overall cost of the battery pack 100.

[0069] It should be noted that, for ease of description, in the embodiments of this application, the first direction can be the length direction of the battery box 400, that is... Figure 2 The x-direction. The second direction can be the height direction of the battery box (400), i.e. Figure 2 The y-direction. The third direction can be the width direction of the battery box (400), i.e. Figure 2 The z-direction in the equation.

[0070] Based on the above embodiments, in one possible implementation, the battery housing 400 can be made of carbon glass fiber composite material, and this application embodiment does not impose any limitations on this. This effectively reduces the weight of the battery pack 100, achieving the goal of lightweighting the battery pack 100.

[0071] Continue to refer to Figure 1 Based on the above embodiments, in one possible implementation, both the battery housing 400 and the battery module 200 can be rectangular structures; this application embodiment is not limited thereto. In this application embodiment, as... Figure 5 As shown, the battery housing 400 may include multiple support beams 410. These support beams 410 can divide the battery housing 400 into a module cavity 411 and an electrical cavity 412. It is understood that the battery module 200 may be located in the module cavity 411, while the electrical management system 300 may be located in the electrical cavity 412.

[0072] Continue to refer to Figure 5Based on the above embodiments, the battery housing 400 may further include: a bottom protective plate 420, an outer liner 430, an inner liner 440, and a connecting piece 450. The bottom protective plate 420, outer liner 430, and inner liner 440 can all be molded from carbon fiber composite material, and the bottom protective plate 420, outer liner 430, and inner liner 440 are bonded together in pairs using adhesives to form the battery housing 400. In one possible embodiment, the connecting piece 450 can connect the support beam 410 to the inner liner 440 by screwing, which can be used to distribute the stress of the support beam 410 and improve the overall modality of the battery housing 400.

[0073] Continue to refer to Figure 5 Based on the above embodiments, the battery housing 400 may further include: a lifting lug 460 and a sealing plate 470. The lifting lug 460 can be fixed to the outer liner 430 of the battery housing 400 using an adhesive. In one possible implementation, the adhesive can be structural adhesive, and the lifting lug 460 can be bonded to the outer liner 430 using structural adhesive. In this embodiment, it is understood that the connection between the lifting lug 460 and the outer liner 430 allows the battery pack 100 to be securely installed in a predetermined position on the vehicle via the lifting lug 460, ensuring that it will not shift or loosen during vehicle operation. Furthermore, the two ends of the lifting lug 460 in the first direction may have outwardly open cavities, and the sealing plate 470 can be used to seal the exposed cavities at both ends of the lifting lug 460, preventing foreign objects from entering the cavities of the lifting lug 460 during vehicle operation and reducing wind noise.

[0074] Continue to refer to Figure 3 Based on the above embodiments, the battery module 200 may include: a battery cell unit 220. In one possible implementation, the number of battery cell units 220 can be several; however, this application embodiment does not limit the number of battery cell units 220. In this application embodiment, as... Figure 6 As shown, taking a cylindrical cell as an example, several cell units 220 can be arranged alternately along the first direction, so that a continuous serpentine channel 221 can be formed between adjacent columns of cell units 220. It can be understood that the serpentine channel 221 can be a continuous wave-shaped channel formed by the alternating protrusions of the outer surfaces of adjacent columns of cell units 220.

[0075] Continue to refer to Figure 6Based on the above embodiments, from a top view, the multiple battery cell units 220 can be arranged in a hexagonal structure to achieve a close arrangement, accommodating more battery cell units 220 within the same volume, thereby maximizing the utilization of the internal space of the battery module 200 and improving the energy density of the battery module 200. Furthermore, with the multiple battery cell units 220 arranged closely, the formation of the serpentine channel 221 can retain a certain heat dissipation gap, facilitating the flow of air or coolant within the serpentine channel 221, and effectively dissipating the heat generated by the battery cell units 220 during charging and discharging.

[0076] Continue to refer to Figure 3 Based on the above embodiments, the battery module 200 may further include: a first module housing 230 and a second module housing 240. The first module housing 230 and the second module housing 240 may be located on opposite sides of the cell unit 220 in a second direction. In one possible implementation, the first module housing 230 has a plurality of first mounting holes 231, and the second module housing 240 has a plurality of second mounting holes 241. The number of first mounting holes 231 and second mounting holes 241 may be the same as the number of cell units 220. In this embodiment, one end of the cell unit 220 may be inserted into the first mounting hole 231, and the other end of the cell unit 220 may be inserted into the second mounting hole 241, thereby fixing the first module housing 230 and the second module housing 240 to both ends of the cell unit 220, and further securing them with fasteners, so that the first module housing 230 and the second module housing 240 protect the cell unit 220.

[0077] Continue to refer to Figure 3 Based on the above embodiments, the battery module 200 may further include a busbar 250. The busbar 250 can be fixedly connected to the side of the first module housing 230 facing away from the cell unit 220, and the flexible circuit board 210 can be fixedly connected to the busbar 250. In one possible implementation, the side of the first module housing 230 facing the busbar 250 may be provided with multiple positioning holes 232, and fasteners can be sequentially inserted into the busbar 250 and the positioning holes 232, thereby fixing the busbar 250 to the first module housing 230.

[0078] In one possible implementation, the flexible circuit board 210 can be fixed to the bus 250 by laser welding. The bus 250 may include a main positive bus 250, a serial bus 250, a bridging bus 250, and a main negative bus 250. This application does not limit the scope of the embodiments described herein.

[0079] Continue to refer to Figure 3Based on the above embodiments, the battery module 200 may further include a protective cover 260. The protective cover 260 may be located at a corner of the first module housing 230. In one possible implementation, the protective cover 260 may be a plastic part with a snap-fit ​​mechanism, which is assembled with the first module housing 230 via a snap-fit ​​connection to provide high-voltage protection.

[0080] Continue to refer to Figure 3 Based on the above embodiments, the battery module 200 may further include a module cover 270. The module cover 270 may be disposed on the flexible circuit board 210, such that the module cover 270 is located at the top of the battery module 200. In one possible implementation, the module cover 270 may be a 0.5mm thick plastic plate; however, this embodiment is not limited thereto.

[0081] refer to Figure 7 Based on the above embodiments, the battery pack 100 may further include a thermal management system 500. The thermal management system 500 may include cold plates 510. In one possible implementation, the number of cold plates 510 may be several; this application embodiment does not limit the number of cold plates 510. In this application embodiment, several cold plates 510 may extend along a first direction, and each cold plate 510 may have a flow channel 511. It is understood that, as Figure 8 As shown, the shape of the cold plate 510 can match the serpentine channel 221, so that the cold plate 510 can be inserted into the serpentine channel 221, and the cold plate 510 can contact the outer surface of the adjacent cell unit 220, so that the cold plate 510 can achieve the purpose of heat dissipation for the cell unit 220.

[0082] Understandably, the cooling plate 510 can dissipate heat from the battery cell 220. Through the cooling effect of the cooling plate 510, the temperature of the entire battery pack 100 can be reduced, the possibility of thermal runaway can be reduced, and vehicle safety can be improved.

[0083] Continue to refer to Figure 7Based on the above embodiments, the thermal management system 500 may further include a liquid inlet assembly 520 and a liquid outlet assembly 530. Both the liquid inlet assembly 520 and the liquid outlet assembly 530 are located on the same side of the cold plate 510 in a first direction. In one possible implementation, the liquid inlet assembly 520 may further include a liquid inlet pipe 522 and a liquid inlet connector 521. The liquid inlet connector 521 may be connected to the end of the liquid inlet pipe 522, which extends in a third direction and may have a plurality of first connecting portions 5221. These first connecting portions 5221 may be connected to a plurality of cold plates 510, thereby connecting the flow channels 511 within the cold plate 510 to the liquid inlet pipe 522. It is understood that the number of first connecting portions 5221 may be the same as the number of cold plates 510, so that each cold plate 510 can be connected to the liquid inlet pipe 522.

[0084] In one possible implementation, the liquid outlet assembly 530 may further include a liquid outlet pipe 532 and a liquid outlet connector 531. The liquid outlet connector 531 may be connected to the end of the liquid outlet pipe 532, which may extend in a third direction and may have a plurality of second connecting portions 5321. These second connecting portions 5321 may be connected to a plurality of cold plates 510, thereby connecting the flow channels 511 within the cold plates 510 to the liquid outlet pipe 532. It is understood that the number of second connecting portions 5321 may also be the same as the number of cold plates 510, so that each cold plate 510 can be connected to the liquid outlet pipe 532.

[0085] Continue to refer to Figure 7 Based on the above embodiments, the inlet pipe 522 and the outlet pipe 532 can be alternately arranged in the second direction, thereby saving space in the first direction and making the appearance more aesthetically pleasing. In one possible implementation, both the inlet connector 521 and the outlet connector 531 can be located on the outer liner 430 of the battery box 400, and both the inlet connector 521 and the outlet connector 531 can have a silicone rubber sealing structure to achieve a sealing function. It is understood that the inlet assembly 520, the outlet assembly 530 and the cold plate 510 are combined to form a parallel circuit. The coolant enters the inlet pipe 522 through the inlet connector 521 and is transported along the first connecting part 5221 to the flow channel 511 of the cold plate 510, so that the coolant can dissipate heat from the cell unit 220, and then enters the outlet pipe 532 along the second connecting part 5321 and flows out through the outlet connector 531.

[0086] Based on the above embodiments, the thermal management system 500 may further include a heat-conducting component (not shown in the figure). The heat-conducting component can be attached to the cold plate 510, thereby allowing it to adhere to the outer surface of the battery cell 220, thus effectively transferring heat.

[0087] Continue to refer to Figure 4 Based on the above embodiments, the electrical management system 300 may further include a battery disconnection unit 330. The battery disconnection unit 330 may be located on one side of the host 310. It is understood that the battery disconnection unit 330 is capable of disconnecting the battery module 200 from the electrical management system 300 when needed.

[0088] Continue to refer to Figure 4 Based on the above embodiments, the electrical management system 300 may further include a high-voltage plug-in 340. The high-voltage plug-in 340 is fixed to the outer liner 430 of the battery housing 400, and one end of the high-voltage plug-in 340 passes through the battery housing 400 and is connected to the battery disconnection unit 330. It is understood that the high-voltage plug-in 340 can be used to connect a high-voltage power supply to the battery disconnection unit 330.

[0089] Continue to refer to Figure 4 Based on the above embodiments, the electrical management system 300 may further include a low-voltage plug-in 350. The low-voltage plug-in 350 is fixed to the outer liner 430 of the battery housing 400, and is located on one side of the high-voltage plug-in 340. One end of the low-voltage plug-in 350 passes through the battery housing 400 and is connected to the host 310 via a wiring harness. It is understood that the low-voltage plug-in 350 can be used to connect a low-voltage signal to the host 310 and the slave 320. It is also understood that the high-voltage plug-in 340 and the low-voltage plug-in 350 are respectively positioned opposite to the inlet connector 521 and the outlet connector 531.

[0090] Continue to refer to Figure 4 Based on the above embodiments, the electrical management system 300 may further include a high-voltage connection bus 360. The high-voltage connection bus 360 can be connected between the high-voltage plug-in 340 and the battery disconnection unit 330. It is understood that the high-voltage connection bus 360 can be used to transmit high-voltage current. In one possible implementation, the high-voltage connection bus 360 may include a battery total positive connection, a battery total negative connection, a module series connection, an output positive connection, and an output negative connection. The embodiments described in this application are not limited thereto.

[0091] refer to Figure 9Based on the above embodiments, the electrical management system 300 may further include a first electrical bracket 370. In one possible implementation, the first electrical bracket 370 may further include a mounting end 371 and a protruding end 372. The mounting end 371 may abut against the main unit 310, while the protruding end 372 may extend along a third direction and away from the main unit 310. A through hole 373 may be provided on the protruding end 372, and a fastener may pass through the through hole 373 so that the main unit 310 is fixedly connected to the battery box 400 through the protruding end 372. In the embodiments of this application, as... Figure 10 As shown, there can be two first electrical brackets 370. The two first electrical brackets 370 can be located at the two ends of the host 310 in the third direction, thereby fixing the host 310.

[0092] Continue to refer to Figure 5 Based on the above embodiments, the electrical management system 300 may further include a second electrical bracket 380. In one possible implementation, the number of second electrical brackets 380 may be six, and this application embodiment does not impose a limitation. In this application embodiment, the six second electrical brackets 380 can be fixed to the support beam 410 by fasteners, and every two second electrical brackets 380 can be located at opposite ends of the slave device 320 in a third-order direction, thereby fixing the slave device 320 with the second electrical brackets 380.

[0093] Continue to refer to Figure 2 Based on the above embodiments, the battery pack 100 may further include a battery cover 600. The battery cover 600 can be abutted on the battery housing 400. In one possible implementation, the battery cover 600 can be made of polyurethane material, further improving the lightweight design; however, this application does not limit the scope of the embodiment. In this application embodiment, the battery cover 600 can be integrally molded using injection molding, thereby reducing seams and improving sealing.

[0094] refer to Figure 11 Based on the above embodiments, the surface of the battery box cover 600 may be provided with a plurality of reinforcing ribs 610. The reinforcing ribs 610 may be transverse or longitudinal structures, thereby improving the compressive and deformation resistance of the battery box cover 600. Additionally, the battery box cover 600 may also have mounting holes 620, within which a notched steel insert is provided to prevent plastic cracking at the mounting holes 620 during sealing, thus improving load-bearing capacity and deformation resistance.

[0095] Continue to refer to Figure 2Based on the above embodiments, the battery pack 100 may further include a sealing element 700. The sealing element 700 may be located between the battery cover 600 and the battery housing 400. It is understood that the sealing element 700 ensures that the battery pack 100 has dustproof and waterproof performance.

[0096] Continue to refer to Figure 1 Based on the above embodiments, the battery pack 100 may further include an explosion-proof valve 800. The explosion-proof valve 800 may be located on the outer liner 430 of the battery housing 400, and the explosion-proof valve 800, the inlet connector 521, and the outlet connector 531 are located on the same side. It is understood that the explosion-proof valve 800 can actively relieve pressure to balance the internal pressure, preventing the battery pack 100 from exploding or being structurally damaged.

[0097] This application provides a battery system (not shown in the figures) in a second aspect. The battery system may include the battery pack 100 described above.

[0098] This application provides a vehicle (not shown in the figures) in a third aspect. The vehicle may include the battery system described above.

[0099] In this embodiment of the application, the battery pack 100 provided in this embodiment extends the plug-in end 211 of the flexible circuit board 210 in the battery module 200 toward the electrical management system 300, so that the flexible circuit board 210 can be directly plugged into and connected to the slave device 320 in the electrical management system 300, thereby saving a certain amount of wiring harness material, effectively reducing the overall cost of the battery pack 100, and making the overall layout of the battery pack 100 more compact and aesthetically pleasing.

[0100] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0101] It should be noted that phrases such as "in specific implementations," "in some embodiments," "in this embodiment," and "exemplarily" in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0102] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0103] It should be readily understood that “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0104] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0105] Finally, it should be noted that other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and alterations may be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A battery pack, characterized in that, include: A battery module (200) includes flexible circuit boards (210) arranged side by side along a first direction, and the plug-in end (211) of the flexible circuit boards (210) extends along a second direction; An electrical management system (300) includes a host (310), a slave (320), a battery disconnection unit (330), a high-voltage plug (340), a low-voltage plug (350), and a high-voltage connection bus (360). Multiple slave devices (320) are arranged in parallel along a third direction, and each slave device (320) is electrically connected to the host device (310). The plug-in terminal (211) of the flexible circuit board (210) is plugged into the slave device (320). The battery disconnect unit (330) is located on the third-direction upward side of the host (310), and the high-voltage connection bar (360) is connected to the battery disconnect unit (330). The battery housing (400), the battery module (200) and the electrical management system (300) are all located in the battery housing (400), and the high voltage plug (340) and the low voltage plug (350) are sequentially fixed to the outer liner (430) of the battery housing (400) along the third direction.

2. The battery pack according to claim 1, characterized in that, The battery housing (400) is made of carbon glass fiber composite material.

3. The battery pack according to claim 2, characterized in that, The battery module (200) includes: a cell unit (220), and a plurality of the cell units (220) are arranged alternately along the first direction so that a continuous serpentine channel (221) is formed between adjacent columns of the cell units (220). The serpentine channel (221) is a continuous wave-shaped channel formed by alternating protrusions of the outer surfaces of adjacent columns of the cell units (220).

4. The battery pack according to claim 3, characterized in that, The battery module (200) further includes a first module housing (230), a second module housing (240), and a busbar (250), wherein the first module housing (230) and the second module housing (240) are respectively located on both sides of the cell unit (220) in the second direction; The first module housing (230) has a plurality of first mounting holes (231), and the second module housing (240) has a plurality of second mounting holes (241). One end of the battery cell unit (220) is inserted into the first mounting hole (231), and the other end is inserted into the second mounting hole (241). The busbar (250) is fixedly connected to the side of the first module housing (230) facing away from the battery cell unit (220), and the flexible circuit board (210) is fixedly connected to the busbar (250).

5. The battery pack according to claim 3, characterized in that, Also includes: A thermal management system (500) includes a plurality of cold plates (510) extending along the first direction, and the cold plates (510) are provided with flow channels (511). The shape of the cold plate (510) matches the serpentine channel (221) so that the cold plate (510) is inserted into the serpentine channel (221) and the cold plate (510) is in contact with the outer surface of the adjacent cell unit (220).

6. The battery pack according to claim 5, characterized in that, The thermal management system (500) further includes a liquid inlet assembly (520) and a liquid outlet assembly (530), wherein the liquid inlet assembly (520) and the liquid outlet assembly (530) are both located on the same side of the cold plate (510) in the first direction; The liquid inlet assembly (520) includes a liquid inlet pipe (522) and a liquid inlet connector (521). The liquid inlet connector (521) is connected to the end of the liquid inlet pipe (522). The liquid inlet pipe (522) extends along the third direction and has a plurality of first connecting parts (5221) on it. The first connecting parts (5221) are connected to the cold plate (510) so that the flow channel (511) and the liquid inlet pipe (522) are connected. The liquid outlet assembly (530) includes a liquid outlet pipe (532) and a liquid outlet connector (531). The liquid outlet connector (531) is connected to the end of the liquid outlet pipe (532). The liquid outlet pipe (532) extends along the third direction and has a plurality of second connecting parts (5321) on it. The second connecting parts (5321) are connected to the cold plate (510) so that the flow channel (511) and the liquid outlet pipe (532) are connected.

7. The battery pack according to any one of claims 1-6, characterized in that, The electrical management system (300) further includes: a first electrical support (370); The first electrical bracket (370) includes a mounting end (371) and a protruding end (372). The mounting end (371) abuts against the host (310). The protruding end (372) extends along the third direction and away from the host (310). The host (310) is fixedly connected to the battery box (400) through the protruding end (372).

8. The battery pack according to any one of claims 1-6, characterized in that, The battery housing (400) includes a support beam (410); The support beam (410) divides the battery box (400) into a module cavity (411) and an electrical cavity (412), with the battery module (200) located in the module cavity (411) and the electrical management system (300) located in the electrical cavity (412).

9. A battery system, characterized in that, It includes several battery packs (100) as described in any one of claims 1-8 above.

10. A vehicle, characterized in that, Includes the battery system described in claim 9 above.

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