Electrical cabin, battery pack and vehicle

Abstract

The utility model provides an electrical cabin, a battery pack and a vehicle. The electrical cabin comprises an electrical cabin body, the BMS assembly is installed in the electrical bin body and used for being connected with a battery module located on the outer side of the electrical bin body, the BMS assembly comprises a first BMS assembly and a second BMS assembly, and the first BMS assembly and the second BMS assembly are arranged in the height direction of the electrical bin body. The technical problem that a plurality of BMSs occupy a large space in the width direction of the electrical bin can be solved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to an electrical compartment, a battery pack, and a vehicle. Background Technology

[0002] The battery pack is one of the core components of a vehicle, providing the electric motor with the necessary power to drive the vehicle. To improve driving range, high-capacity, high-voltage, and high-current battery packs are often used, resulting in a large number of cells connected in series within the battery pack.

[0003] The electrical compartment of a battery pack typically houses various electrical components used to manage and control the operation of the battery modules. In related technologies, when the electrical compartment includes multiple BMS (Battery Management Systems), the multiple BMS are usually arranged along the width of the electrical compartment, which results in the multiple BMS occupying a large space in the width direction of the electrical compartment. Utility Model Content

[0004] Embodiments of this utility model provide an electrical compartment, a battery pack, and a vehicle, which can improve the technical problem of multiple BMS occupying a large space in the width direction of the electrical compartment.

[0005] In a first aspect, embodiments of the present invention provide an electrical compartment, comprising:

[0006] Electrical enclosure;

[0007] The BMS component is installed inside the electrical compartment and is used to connect to the battery module located outside the electrical compartment. The BMS component includes a first BMS component and a second BMS component, wherein the first BMS component and the second BMS component are arranged along the height direction of the electrical compartment.

[0008] Secondly, embodiments of the present invention provide a battery pack for a vehicle, comprising:

[0009] A battery compartment and a battery module, wherein the battery module is installed in the battery compartment;

[0010] As described above, the electrical compartment is connected to the battery compartment, and the battery compartment and the electrical compartment are arranged along the length of the battery pack.

[0011] Secondly, embodiments of the present invention provide a battery pack for a vehicle, including the aforementioned electrical compartment or the aforementioned battery pack.

[0012] The beneficial effects of the embodiments of this utility model are as follows:

[0013] In an embodiment of this utility model, the BMS component includes a first BMS component and a second BMS component, wherein the first BMS component and the second BMS component are arranged along the height direction of the electrical compartment. Thus, compared to related technologies where the BMS components are arranged along the width direction of the electrical compartment, the first BMS component and the second BMS component occupy less space in the width direction of the electrical compartment in this embodiment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a top view of the battery pack provided in an embodiment of this application.

[0016] Figure 2 yes Figure 1 Cross-sectional view along the AA direction.

[0017] Figure 3 yes Figure 2 A magnified view of a section at point B in the middle.

[0018] Figure 4 This is a top view of a portion of the structure of the battery pack provided in the first embodiment of this utility model.

[0019] Figure 5 yes Figure 4 A magnified view of a section at point C.

[0020] Figure 6 This is a top view of a portion of the structure of the battery pack provided in the second embodiment of this utility model.

[0021] Figure 7 yes Figure 6 Cross-sectional view along the DD direction.

[0022] Figure 8 yes Figure 1 A partial structural diagram of the Zhongdian warehouse.

[0023] Figure 9 This is a schematic diagram of a portion of the battery pack structure provided in the third embodiment of this utility model.

[0024] Figure 10 yes Figure 9 A magnified view of a section at point E in the middle.

[0025] Figure 11This is a schematic diagram of a portion of the battery pack structure provided in the fourth embodiment of this utility model.

[0026] Figure 12 yes Figure 11 A magnified view of a section at point F.

[0027] Figure 13 This is a schematic diagram of a portion of the structure of the battery pack provided in the fifth embodiment of this utility model.

[0028] Figure 14 yes Figure 13 A magnified view of a section at point G.

[0029] Figure 15 This is a circuit diagram of the battery pack provided in an embodiment of this application.

[0030] Figure 16 This is a block diagram of the vehicle provided in the embodiments of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Battery pack; 100. Housing assembly; 101. Housing; 102. Battery compartment cover; 103. Crossbeam; 105. Middle housing; 109. Mounting housing; 110. Battery compartment; 1101. Second bottom wall; 111. First cavity; 113. Second cavity; 130. Electrical compartment; 1301. First bottom wall; 1305. First mounting component; 1307. Electrical compartment cover; 1308. First side wall;

[0033] 200, Battery module; 210, First battery module; 230, Second battery module; 240, Third battery module; 250, Fourth battery module;

[0034] 300, BMS assembly; 310, First BMS assembly; 311, Second BMS; 313, First BMS; 314, Wiring section; 330, Second BMS assembly; 331, Third BMS; 333, Fourth BMS; 315, Shunt; 317, First fuse; 318, Precharge resistor; 3351, First positive relay; 3353, Precharge relay; 3355, First negative relay; 3357, Charging negative relay; 3359, Charging positive relay;

[0035] 400. Second mounting component; 403. Second mounting section; 401. First mounting section; 405. Reinforcing section;

[0036] 810. First overcurrent component; 830. Second overcurrent component;

[0037] 20. Vehicles; 30. Electrical warehouse. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0039] The battery pack is one of the core components of a vehicle, providing the electric motor with the necessary power to drive the vehicle. To improve driving range, high-capacity, high-voltage, and high-current battery packs are often used, resulting in a large number of cells connected in series within the battery pack.

[0040] The electrical compartment of a battery pack typically houses various electrical components used to manage and control the operation of the battery modules. In related technologies, when the electrical compartment includes multiple battery management systems (BMS), these BMS are usually arranged along the width of the compartment, which results in the multiple BMS occupying a large amount of space in that direction.

[0041] To solve the above-mentioned technical problems, the first aspect is, such as Figure 1 As shown, this application embodiment provides an electrical compartment 30 for a battery pack 10. As... Figure 2 As shown, the electrical compartment 30 includes an electrical compartment body 130 and a BMS component 300. The BMS component 300 is installed inside the electrical compartment body 130 and is used to connect to the battery module 200 located outside the electrical compartment body 130. The BMS component 300 includes a first BMS component 310 and a second BMS component 330, wherein the first BMS component 310 and the second BMS component 330 are arranged along the height direction of the electrical compartment body 130.

[0042] In an embodiment of this utility model, the BMS component 300 includes a first BMS component 310 and a second BMS component 330, wherein the first BMS component 310 and the second BMS component 330 are arranged along the height direction of the electrical compartment 130. Compared to related technologies where the BMS components are arranged along the width direction of the electrical compartment, the first BMS component 310 and the second BMS component 330 occupy less space in the width direction of the electrical compartment in this embodiment.

[0043] The BMS component 300 is installed inside the electrical compartment 130, and the battery module 200 is located outside the electrical compartment 130 to avoid interference between the BMS component 300 and the battery module 200, and to facilitate the maintenance and installation of the BMS component 300 and the battery module 200 respectively.

[0044] The battery module 200 and the BMS component 300 can be electrically connected, and the BMS component 300 can manage and control the battery module 200.

[0045] A battery module can be a unit composed of several battery cells connected in series or parallel. The internal components of a battery module can integrate connectors, protection circuits, temperature sensors, etc., to ensure safe and efficient energy transfer.

[0046] In some embodiments, when the electrical compartment is applied to the battery pack, the width direction of the electrical compartment can be aligned with the width direction of the battery pack, the height direction of the electrical compartment can be aligned with the height direction of the battery pack, and the length direction of the electrical compartment can be aligned with the length direction of the battery pack, so that the first BMS component 310 and the second BMS component 330 occupy less space in the width direction of the battery pack 10. Furthermore, when the battery pack is applied to the vehicle 20, the width direction of the vehicle can be aligned with the width direction of the battery pack, the height direction of the vehicle can be aligned with the height direction of the battery pack, and the length direction of the vehicle can be aligned with the length direction of the battery pack, so that the first BMS component 310 and the second BMS component 330 occupy less space in the width direction of the vehicle.

[0047] The BMS component 300, as the battery management system in the battery pack, can have one or more of the following functions: First, it can continuously collect status information about each cell in the battery module, such as temperature, voltage, and current, and assess the overall health of the battery module accordingly. Second, based on the collected data, the BMS can calculate key indicators such as SOC (State of Charge), SOH (State of Health), and SOP (State of Power). Third, it can prevent problems such as overcharging, over-discharging, and overheating of the battery. For example, when an abnormality is detected, it can cut off the circuit or send an alarm signal to the external control system. Fourth, it can balance the charge levels between individual cells through active or passive methods, thereby extending the lifespan of the entire battery pack. Fifth, it can also be equipped with standardized communication protocols (such as CAN bus) to exchange data with other vehicle electronic devices. The BMS component 300 can include multiple BMSs. For example, BMS component 300 may include a third BMS 331, a fourth BMS 333, a second BMS 311, and a first BMS 313.

[0048] Please combine Figure 3 In some embodiments, the electrical compartment 130 includes a first bottom wall 1301 and a first mounting member 1305 disposed opposite to each other. The first mounting member 1305 and the first bottom wall 1301 are arranged along the height direction of the electrical compartment 130. A first BMS component 310 is located on the side of the first mounting member 1305 away from the first bottom wall 1301. A second BMS component 330 is installed between the first bottom wall 1301 and the first mounting member 1305.

[0049] The first mounting component 1305 facilitates the installation of the first BMS component 310. By positioning the first BMS component 310 on the side of the first mounting component 1305 away from the first bottom wall 1301, and installing the second BMS component 330 between the first bottom wall 1301 and the first mounting component 1305, the first BMS component 310 and the second BMS component 330 are arranged along the height direction of the electrical compartment 130.

[0050] Please combine Figure 4 and Figure 5 In some embodiments, the first BMS component 310 includes a first BMS 313 and a second BMS 311. The first BMS 313 and the second BMS are arranged along the length of the electrical compartment 130. The first BMS 313 and the second BMS 311 are electrically connected. The second BMS 311 is used to be electrically connected to the battery module 200.

[0051] The first BMS313 can be used as the master BMS, and the second BMS311 can be used as the slave BMS. The second BMS311 is used to be electrically connected to the battery module 200, thereby collecting the current and voltage of multiple cells in the battery module 200. The first BMS313 can be used to manage and control the second BMS311, and can also be used to collect the current and voltage of electrical components in the electrical compartment 130, and manage and control the working state of electrical components in the electrical compartment 130, thereby managing and controlling the working state of each cell in the battery module 200.

[0052] In some embodiments, the electrical compartment further includes a plurality of electrical components, and the electrical compartment body 130 contains the plurality of electrical components, which may include a first current-carrying component 810 and a second current-carrying component 830.

[0053] Please combine Figure 7 And 8, the electrical compartment includes a first current-carrying component 810, which is used to electrically connect to the battery module 200. The first current-carrying component 810 is installed on the side of the first mounting member 1305 away from the first bottom wall 1301. The first current-carrying component 810 and the first BMS component 310 are arranged along the width direction of the electrical compartment body 130.

[0054] In some embodiments, the first current-carrying component 810 includes a current shunt 315 for electrical connection with the battery module 200 and arranged with the first BMS component 310 along the width direction of the electrical compartment.

[0055] Shunts can be used to monitor current changes during the charging and discharging process of battery modules. Specifically, a shunt can measure large currents by directing a small portion of the current to a measuring instrument. A shunt is essentially a precision resistor with extremely low resistance; when a DC current flows through it, a small voltage drop proportional to the current magnitude is generated across its terminals. This voltage drop can be detected by a millivoltmeter or other measuring device connected across it and converted into a corresponding current reading. This design allows the shunt to effectively extend the measurement range of the ammeter because it allows most of the current to bypass the ammeter and flow directly through the shunt, with only a small portion flowing through the ammeter, thus avoiding the risk of the ammeter being damaged by overload. The shunt can be made of manganese copper, a material with a low temperature coefficient of resistance and high resistivity, to ensure a stable resistance value under different temperature conditions. This helps improve measurement accuracy and reduce errors caused by changes in ambient temperature.

[0056] In some embodiments, the first overcurrent assembly 810 further includes a first fuse 317, and the first BMS assembly 310 is located between the shunt 315 and the first fuse 317 along the width direction of the electrical compartment.

[0057] The first fuse acts as the first line of defense, protecting the battery module from damage caused by short circuits and other abnormal current conditions. In the event of a severe overcurrent or short circuit, the first fuse can respond and disconnect the circuit in a very short time to prevent potential safety risks such as fire or explosion. The main functions of the first fuse are: in the event of a high-voltage overcurrent or short circuit, the first fuse will quickly melt, immediately interrupting the fault current path and ensuring the safety of the battery module; the first fuse can also handle prolonged and continuous overload conditions. If the actual operating current of the system exceeds the set safety threshold but is not high enough to trigger immediate melting, the fuse can still provide a certain level of protection; the first fuse can work in conjunction with other types of protection devices (such as relays, pre-charge resistors, etc.). For example, under low-multiple overcurrent conditions, the BMS can control the relays for management; while in the face of higher-multiple transient peak currents, the fuse can be relied upon for emergency disconnection.

[0058] In some embodiments, the electrical enclosure 130 further includes a second mounting member 400, which is located between the first bottom wall 1301 and the first mounting member 1305; the second mounting member 400 includes a first mounting portion 401, which is mounted on the first bottom wall 1301 and disposed opposite to the first bottom wall 1301.

[0059] Please combine Figure 8 The electrical compartment also includes a second current-carrying component 830, which is installed on the side of the first mounting part 401 away from the first bottom wall 1301 and is electrically connected to the first current-carrying component 810.

[0060] The second current-carrying component 830 is installed on the side of the first mounting portion 401 of the second mounting member 400 away from the first bottom wall 1301. The first current-carrying component 810 is installed on the side of the first mounting member 1305 away from the first bottom wall 1301. The second mounting member 400 is located between the first bottom wall 1301 and the first mounting member 1305. In this way, the first current-carrying component 810 and the second current-carrying component 830 are arranged along the height direction of the electrical compartment 130.

[0061] Please combine Figure 10 and Figure 15 In some embodiments, the second overcurrent assembly 830 includes a positive charging relay 3359 and a negative charging relay 3357. The positive charging relay 3359 is electrically connected to the first fuse 317, and the negative charging relay 3357 is electrically connected to the shunt 315. The positive charging relay 3359 and the negative charging relay 3357 are arranged along the width direction of the electrical compartment.

[0062] The positive charging relay 3359 can be installed between the positive terminal of the battery module and the charging circuit. When the vehicle needs to be charged, the positive charging relay 3359 closes, forming a positive current path from the charging station to the battery module; when the charging process ends or a fault is detected, it opens to cut off the current and ensure safety.

[0063] The negative charging relay 3357 can be installed on the negative terminal side of the battery module and works in conjunction with the positive charging relay 3359. The negative charging relay 3357 can provide a complete circuit during charging and disconnect when not charging to prevent any unnecessary current flow, thereby avoiding potential safety hazards such as short circuits or overheating.

[0064] In some embodiments, the second overcurrent assembly 830 further includes a first positive relay 3351 and a first negative relay 3355. The first positive relay 3351 is electrically connected to the first fuse 317, and the first negative relay 3355 is electrically connected to the shunt 315. The first positive relay 3351 is located between the charging positive relay 3359 and the charging negative relay 3357, and the first negative relay 3355 is located on the side of the charging negative relay 3357 opposite to the charging positive relay 3359.

[0065] In some embodiments, the first positive relay 3351 is located on the positive side of the battery module and is responsible for controlling the forward current path from the battery module to the vehicle's high-voltage electrical system. Under normal operating conditions, when the vehicle starts or requires electric drive, the first positive relay 3351 closes, allowing current to flow to the motor controller and other high-voltage loads. In non-operating states, emergencies, or during maintenance, the first positive relay 3351 opens to ensure that no current can flow from the battery, thereby protecting the safety of personnel and equipment.

[0066] The first negative relay 3355 is located on the negative side of the battery module and can be connected to the vehicle ground wire. The first negative relay 3355 and the first positive relay 3351 work together to provide a complete current loop. The first negative relay 3355 can close to complete the circuit when needed and open to disconnect the circuit when power is not needed or in case of a fault, thus avoiding possible short circuits or other electrical hazards.

[0067] In some embodiments, the second overcurrent assembly 830 further includes a pre-charge resistor 318, which is electrically connected to the first fuse 317 and is disposed between the first positive relay 3351 and the charging negative relay 3357.

[0068] The pre-charge resistor 318 limits inrush current. When the main relay between the battery module and the motor controller is closed, a low-impedance path is formed because the large-capacity capacitor bank in the motor controller is uncharged, which can lead to very large transient currents (inrush currents). The pre-charge resistor 318 effectively limits this initial current, preventing it from exceeding a safe threshold and avoiding damage to capacitors and other circuit components. The pre-charge resistor 318 also protects electronic components. By gradually charging the capacitors in the motor controller, the pre-charge resistor helps ensure that these components are not damaged by sudden high voltages. This not only extends the lifespan of electronic equipment but also improves system reliability. The pre-charge resistor 318 also stabilizes the power supply voltage. The pre-charge process allows the motor controller and its related circuits to smoothly reach the operating voltage, rather than experiencing drastic voltage fluctuations. This is crucial for maintaining the stability of the entire electric drive system. The pre-charge resistor 318 may also include a corresponding monitoring mechanism to ensure that the first positive and first negative relays are closed, directly connecting the battery to the motor controller and other loads, only after the capacitors are fully charged and the system is in a stable state.

[0069] In some embodiments, the second overcurrent assembly 830 further includes a pre-charge relay 3353, which is disposed on the side of the positive charging relay 3359 away from the negative charging relay 3357, and is electrically connected to the pre-charge resistor 318.

[0070] In some embodiments, the precharge relay 3353 can gradually build up voltage: when the vehicle starts, the capacitor bank inside the motor controller needs to be charged to the same voltage level as the power battery. After the precharge relay 3353 closes, a current path is formed through the precharge resistor 318, allowing the capacitors to gradually charge until the voltage across them approaches the voltage of the power battery. This process prevents large current surges caused by the capacitor bank initially being in a low-voltage state. The precharge relay 3353 can protect electronic components: by limiting the initial inrush current, the precharge relay 3353 and the precharge resistor 318 work together to ensure that the motor controller and other high-voltage electronic components are not damaged by sudden high currents. This helps extend the lifespan of these components and improves system reliability. The precharge relay 3353 stabilizes the power system; the precharge process ensures that the electric drive system can start smoothly without drastic voltage changes, thereby maintaining the stability of the entire electrical system. The pre-charge relay 3353 supports safe operation. It is typically used in conjunction with monitoring mechanisms in the control system. Only after the capacitor is fully charged and the system voltage has stabilized will the first positive and first negative relays close, directly connecting the battery module to the motor controller and other loads. This avoids potential risks caused by high current. The pre-charge relay 3353 also reduces electromagnetic interference by controlling the current to increase gradually rather than instantaneously reaching a peak. Furthermore, it helps reduce electromagnetic interference generated during startup, which is crucial for maintaining the proper functioning of other electronic devices in the vehicle.

[0071] Please combine Figure 8 In some embodiments, the second mounting member 400 further includes a second mounting portion 403, which is bent and connected to the first mounting portion 401. At least a portion of the second mounting portion 403 is located between the first mounting portion 401 and the first mounting member 1305. The second BMS component 330 is mounted on the side of the second mounting portion 403 near the second current-carrying component 830. The second BMS component 330 and the second current-carrying component 830 are arranged along the length of the electrical compartment.

[0072] The second mounting part 403 is bent and connected to the first mounting part 401. The second mounting part 403 and the first mounting part 401 can be at a 90-degree angle. The second mounting part 403 and the first mounting part 401 can be connected by welding, bonding or other methods, or they can be an integrally formed structure.

[0073] The second BMS component 330 is mounted on the side of the second mounting portion 403 near the second current-carrying component 830, and the second BMS component 330 and the second current-carrying component 830 are arranged along the length of the electrical compartment. Meanwhile, multiple electrical components of the second current-carrying component 830, such as the charging positive relay 3359, the charging negative relay 3357, the first positive relay 3351, the first negative relay 3355, the pre-charge resistor 318, and the pre-charge relay 3353, are arranged along the width of the electrical compartment. This results in a compact structure and good electrical clearance between the second BMS component 330 and the second current-carrying component 830 mounted on the second mounting portion 400.

[0074] Please combine Figure 6 and Figure 7 In some embodiments, the second BMS component 330 includes a third BMS 331 and a fourth BMS 333, which are arranged along the width direction of the electrical compartment 130. This allows for better coordination with the second overcurrent assembly 830 arranged along the width direction of the electrical compartment, fully utilizing the space in all directions of the second mounting member 400, and providing a better electrical clearance between the third BMS 331 and the fourth BMS 333.

[0075] The third BMS331 and the fourth BMS333 can be electrically connected to the first BMS313 respectively.

[0076] The third BMS331 and the fourth BMS333 can act as slave BMSs, working together with the second BMS311 to collect data on the current and voltage of multiple cells in the battery module 200. This application uses one master BMS and three slave BMSs to collect data on the current and voltage of multiple cells in the battery module 200. In other examples, two or four slave BMSs may also be used, depending on the number of cells in the battery module.

[0077] The second BMS311 is used to electrically connect to the battery module 200, thereby collecting the current and voltage of multiple cells in the battery module 200. The first BMS313 can be used to manage and control the second BMS311, and can also be used to collect the current and voltage of electrical components in the electrical compartment 130, and manage and control the working state of the electrical components in the electrical compartment 130, thereby managing and controlling the working state of each cell in the battery module 200.

[0078] In some embodiments, the second mounting member 400 further includes a reinforcing portion 405, at least a portion of which is located between the first mounting portion 401 and the second mounting portion 403, and the reinforcing portion 405 is connected to the first mounting portion 401 and the second mounting portion 403 respectively.

[0079] Since the second flow-through component 830 is installed on the side of the first mounting part 401 away from the first bottom wall 1301, and the first flow-through component 810 is installed on the side of the first mounting member 1305 away from the first bottom wall 1301, a reinforcing part 405 is provided to ensure that the second mounting member 400 remains stable. In this way, the reinforcing part 405 supports the first mounting part 401 and the second mounting part 403, making the second mounting member 400 more stable as a whole.

[0080] To solve the above-mentioned technical problems, in a first aspect, embodiments of this application provide a battery pack 10, which is used in a vehicle, such as a gasoline vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this disclosure does not specifically limit it.

[0081] Please combine Figure 1 as well as Figure 2 In some embodiments, the battery pack 10 may include:

[0082] The battery compartment 110 and the battery module 200 are mounted in the battery compartment 110. The battery module 200 can be a unit composed of several battery cells connected in series or in parallel. The battery module 200 can integrate some connectors, protection circuits, temperature sensors, etc., to ensure safe and efficient energy transfer.

[0083] The battery pack 10 also includes the aforementioned electrical compartment, the electrical compartment body 130 being connected to the battery compartment body 110, and the battery compartment body 110 and the electrical compartment body 130 being arranged along the length of the battery pack.

[0084] Because vehicles contain numerous electrical devices (such as engines, internal combustion engines, etc.), crossbeams, and longitudinal beams, space in the width direction is typically limited. In this embodiment of the invention, the BMS component includes a first BMS component 310 and a second BMS component 330, wherein the first BMS component 310 and the second BMS component 330 are arranged along the height direction of the vehicle. Compared to related technologies that arrange multiple BMS components along the width direction of the vehicle, the first BMS component 310 and the second BMS component 330 occupy less space in the width direction of the vehicle in this embodiment. This reduces the overall space occupied by the battery pack in the width direction of the vehicle. Since the battery module 200 is installed in the battery compartment and the BMS component is installed in the electrical compartment, the BMS component 300 and the battery module 200 are arranged along the length direction of the vehicle. This fully utilizes the height and length directions of the vehicle, making the battery pack structure more compact.

[0085] In some embodiments, when the electrical compartment is applied to a battery pack, the width direction of the electrical compartment can be aligned with the width direction of the battery pack, the height direction of the electrical compartment can be aligned with the height direction of the battery pack, and the length direction of the electrical compartment can be aligned with the length direction of the battery pack, so that the first BMS component 310 and the second BMS component 330 occupy less space in the width direction of the battery pack. Furthermore, when the battery pack is applied to a vehicle, the width direction of the vehicle can be aligned with the width direction of the battery pack, the height direction of the vehicle can be aligned with the height direction of the battery pack, and the length direction of the vehicle can be aligned with the length direction of the battery pack, so that the first BMS component 310 and the second BMS component 330 occupy less space in the width direction of the vehicle.

[0086] In this application, firstly, the battery compartment 110 and the electrical compartment 130 are arranged along the length of the electrical compartment 130. Electrical components such as the first current-carrying component 810 and the second current-carrying component 830 are housed within the electrical compartment 130 without encroaching on the space of the battery compartment 110. This allows the battery compartment 110 to have more space to accommodate the battery module 200, resulting in a larger battery module 200 and a larger number of cells connected in series within the battery pack. Consequently, the battery pack can have a larger capacity, higher voltage, and greater current, thereby increasing the driving range.

[0087] Secondly, the first BMS component 310 and the second BMS component 330 inside the electrical compartment 130 are arranged along the height direction of the electrical compartment 130, resulting in a compact structure that reduces the occupation of the first BMS component 310 and the second BMS component 330 in the length direction of the electrical compartment 130 and reduces the compression on the battery compartment 110.

[0088] Thirdly, the first current-carrying component 810 and the second current-carrying component 830 inside the electrical compartment 130 are arranged along the height direction of the electrical compartment 130, resulting in a compact structure. This further reduces the occupation of the electrical components inside the electrical compartment 130 along the length direction of the electrical compartment 130 and reduces the compression on the battery compartment 110.

[0089] In some examples, please combine Figure 1 as well as Figure 2 The battery pack 10 may include a housing assembly 100, and the battery compartment 110 and the electrical compartment 130 may be two parts connected to the housing assembly 100. Please refer to... Figure 2The housing assembly 100 may include a connected battery compartment 110 and an electrical compartment 130. The battery module 200 is mounted in the battery compartment 110, and the BMS assembly 300 is mounted in the electrical compartment 130. This arrangement allows the BMS assembly 300 and the battery module 200 to be arranged along the length of the vehicle, while the first BMS assembly 310 and the second BMS assembly 330 are arranged along the height of the vehicle. This arrangement fully utilizes both the height and length directions of the vehicle, resulting in a more compact battery pack structure.

[0090] Please combine Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 as well as Figure 14 In some embodiments, the battery compartment 110 includes a second bottom wall 1101 and a middle housing 105. The middle housing 105 and the second bottom wall 1101 are arranged along the height direction of the battery pack (or the height direction of the electrical compartment). The battery module 200 includes a first battery module 210 and a second battery module 230. The first battery module 210 is installed on the side of the middle housing 105 away from the second bottom wall 1101, and the second battery module 230 is installed between the middle housing 105 and the second bottom wall 1101.

[0091] Please combine Figure 3 In some embodiments, the central housing 105 can be connected to the mounting housing 109 by welding, screwing, or snap-fitting. The central housing 105 can divide the internal space of the battery compartment 110 into a first cavity 111 and a second cavity 113 arranged along the height direction of the vehicle. In some examples, the battery compartment 110 also includes a battery compartment cover 102, the first cavity 111 can be located between the central housing 105 and the battery compartment cover 102, and the second cavity 113 can be located on the side of the central housing 105 opposite to the battery compartment cover 102.

[0092] In some embodiments, the battery compartment cover 102 and the electrical compartment cover 1307 can be two parts of a single cover, and the second bottom wall 1101 and the first bottom wall 1301 can be two parts of a single bottom wall.

[0093] The battery module 200 includes a first battery module 210 and a second battery module 230. The first battery module 210 is installed in the first cavity 111, and the second battery module 230 is installed in the second cavity 113.

[0094] In these embodiments, the first battery module 210 is installed in the first cavity 111, and the second battery module 230 is installed in the second cavity 113, thus arranging the first battery module 210 and the second battery module 230 along the height direction of the vehicle. In these embodiments, the battery pack 10 adopts a double-layer box structure design, and the internal space of the battery compartment 110 is divided into the first cavity 111 and the second cavity 113 arranged along the height direction of the vehicle, thereby saving horizontal space. This makes the overall horizontal area occupied by the battery pack smaller, thereby allowing for a larger space to install battery modules within the battery pack, enabling a greater number of battery cells and improving the battery pack's driving range.

[0095] The middle housing 105 may include a battery module tray for the first battery module 210. Thus, the middle housing 105 can provide shock resistance, vibration resistance, and protection for the first battery module 210.

[0096] In some embodiments, the first battery module 210 and the second battery module 230 may be connected in series.

[0097] In some embodiments, more battery modules may be provided, such as a third battery module 240 and a fourth battery module 250. The third battery module 240 and the first battery module 210 are arranged along the length of the vehicle, and a crossbeam may be provided between the third battery module 240 and the first battery module 210. The fourth battery module 250 and the second battery module 230 are arranged along the length of the vehicle, and a crossbeam may be provided between the fourth battery module 250 and the second battery module 230. The third battery module 240 and the fourth battery module 250 are arranged along the height of the vehicle. The first battery module 210, the second battery module 230, the third battery module 240 and the fourth battery module 250 are connected in series, thereby enabling the battery pack to have a larger capacity, a higher voltage and a larger current.

[0098] In some embodiments, the first mounting member 1305 is connected to the middle housing 105. The first mounting member 1305 and the middle housing 105 can be connected by means of screwing, snap-fitting, bonding, welding, etc.

[0099] In some other embodiments, the first mounting member 1305 may be plate-shaped, the first mounting member 1305 may be a structure formed by the middle housing 105 extending along the length direction of the battery pack, and the first mounting member 1305 and the middle housing 105 may be integrally molded.

[0100] In some embodiments, the second bottom wall 1101 is located on the side of the middle housing 105 opposite to the battery compartment cover 102, and the second cavity 113 is located between the middle housing 105 and the second bottom wall 1101. The second bottom wall 1101 can serve as a battery module tray for the second battery module 230, which can protect the second battery module 230 and reduce the impact and vibration on the second battery module 230.

[0101] In some embodiments, the battery pack further includes a crossbeam 103, at least a portion of which is disposed between the battery compartment 110 and the electrical compartment 130.

[0102] In some examples, the housing assembly 100 may include a housing 101 and a crossbeam 103. The housing 101 is provided with a mounting cavity, and the crossbeam 103 is connected to the housing 101 and cooperates with the housing 101 to form a battery compartment 110 and an electrical compartment 130 arranged along the length of the vehicle.

[0103] The housing 101 can be formed by stamping to create the mounting cavity structure, or by connecting different parts of the housing 101. The crossbeam and housing can be connected by bolts, welding, snap-fit, or other methods. Specifically, the housing 101 may include a mounting shell and a cover, with a mounting cavity formed between the mounting shell and the cover. The crossbeam 103 can be connected to the mounting shell 109. The crossbeam 103 can be connected to the mounting shell 109 by welding, bolts, snap-fit, or other methods.

[0104] In these embodiments, the crossbeam 103 can be an expansion beam of the battery pack 10, and the mounting housing 109 can specifically include a battery tray and other housings for mounting the battery module. The crossbeam 103 can be in direct or indirect contact with the battery module 200, so that when the volume of the battery module 200 changes during charging and discharging, the crossbeam 103 can provide support and protection for the battery module 200.

[0105] By placing a crossbeam between the battery compartment 110 and the electrical compartment 130, the volume expansion of the battery module cells due to temperature changes during charging and discharging can be addressed. Furthermore, the crossbeam also enhances the structural strength of the battery pack and provides additional protection in the event of a side collision.

[0106] In some embodiments, the second mounting portion 403 is spaced apart from the crossbeam 103. This prevents the battery module inside the battery compartment 110 from expanding and compressing the second BMS assembly 330.

[0107] In some embodiments, an elastic element, such as foam, can be placed between the second mounting member 400 and the crossbeam 103 to prevent the effects of expansion of the second battery module.

[0108] In some embodiments, the electrical compartment 130 may further include an electrical compartment cover 1307 and a first sidewall 1308. The first sidewall 1308 is connected to a first bottom wall 1301, and the electrical compartment cover 1307 is connected to the first sidewall 1308. The first BMS 313 is provided with a wiring portion 314, which is located at the end of the first BMS 313 away from the electrical compartment cover 1307. This allows the wiring harness to be connected to the wiring portion 314 from the end away from the electrical compartment cover 1307, and then connected to the first BMS 313 through the wiring portion 314. This avoids interference between the wiring harness and the electrical compartment cover 1307.

[0109] The first sidewall 1308 and the first bottom wall 1301 can be connected by welding, bonding, or other methods, or they can be integrally molded. The electrical compartment cover 1307 and the first sidewall 1308 can be detachably connected, such as by screws or snap-fits.

[0110] The first BMS313 is equipped with a wiring section 314, located at the end of the first BMS313 furthest from the electrical compartment cover 1307. This allows the wiring harness to connect to the wiring section 314 from the end furthest from the electrical compartment cover 1307, and then to the first BMS313 via the wiring section 314, avoiding interference between the wiring harness and the electrical compartment cover 1307. One end of the wiring harness can be electrically connected to the first BMS313 via the wiring section 314, and the other end of the wiring harness can be connected to the electrical components of the electrical compartment, enabling the electrical components of the electrical compartment to be electrically connected to the first BMS313. The first BMS313 collects the current and voltage data of the electrical components in the electrical compartment, thereby enabling the management and control of the operating status of the electrical components in the electrical compartment.

[0111] Thirdly, please combine Figure 16 This application also provides a vehicle 20, which includes the battery pack 10 described above.

[0112] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An electrical compartment, characterized in that, For use in battery packs, including: Electrical enclosure (130); A BMS component (300) is installed inside the electrical compartment (130) for connecting to a battery module (200) located outside the electrical compartment (130). The BMS component (300) includes a first BMS component (310) and a second BMS component (330), wherein the first BMS component (310) and the second BMS component (330) are arranged along the height direction of the electrical compartment (130).

2. The electrical compartment according to claim 1, characterized in that, The electrical enclosure (130) includes a first bottom wall (1301) and a first mounting member (1305) disposed opposite to each other. The first mounting member (1305) and the first bottom wall (1301) are arranged along the height direction of the electrical enclosure (130). The first BMS component (310) is located on the side of the first mounting member (1305) away from the first bottom wall (1301). The second BMS component (330) is installed between the first bottom wall (1301) and the first mounting member (1305).

3. The electrical compartment according to claim 2, characterized in that, The first BMS component (310) includes a first BMS (313) and a second BMS (311). The first BMS (313) and the second BMS are arranged along the length of the electrical compartment (130). The first BMS (313) and the second BMS (311) are electrically connected. The second BMS (311) is used to be electrically connected to the battery module (200).

4. The electrical compartment according to claim 2, characterized in that, The electrical compartment also includes a first current-carrying component (810), which is used to electrically connect to the battery module. The first current-carrying component (810) is installed on the side of the first mounting member (1305) away from the first bottom wall (1301). The first current-carrying component (810) and the first BMS component (310) are arranged along the width direction of the electrical compartment.

5. The electrical compartment according to claim 4, characterized in that, The first current-carrying component (810) includes a current shunt (315) for electrical connection with the battery module and is arranged along the width direction of the electrical compartment with the first BMS component (310).

6. The electrical compartment according to claim 5, characterized in that, The first overcurrent assembly (810) also includes a first fuse (317), and the first BMS assembly (310) is located between the shunt (315) and the first fuse (317) along the width direction of the electrical compartment.

7. The electrical compartment according to claim 6, characterized in that, The electrical enclosure (130) further includes a second mounting component (400), which is located between the first bottom wall (1301) and the first mounting component (1305); The second mounting component includes a first mounting part (401), which is mounted on the first bottom wall (1301) and disposed opposite to the first bottom wall (1301). The electrical compartment also includes a second current-carrying component (830), which is installed on the side of the first mounting part (401) away from the first bottom wall (1301) and is electrically connected to the first current-carrying component (810).

8. The electrical compartment according to claim 7, characterized in that, The second overcurrent component (830) includes: A positive charging relay (3359) and a negative charging relay (3357) are provided. The positive charging relay (3359) is electrically connected to the first fuse (317), and the negative charging relay (3357) is electrically connected to the shunt. The positive charging relay (3359) and the negative charging relay (3357) are arranged along the width direction of the electrical compartment.

9. The electrical compartment according to claim 8, characterized in that, The second overcurrent assembly (830) further includes a first positive relay (3351) and a first negative relay (3355). The first positive relay (3351) is electrically connected to the first fuse (317), and the first negative relay (3355) is electrically connected to the shunt. The first positive relay (3351) is located between the charging positive relay (3359) and the charging negative relay (3357), and the first negative relay (3355) is located on the side of the charging negative relay (3357) away from the charging positive relay (3359).

10. The electrical compartment according to claim 9, characterized in that, The second overcurrent assembly further includes a pre-charge resistor (318), which is electrically connected to the first fuse (317) and is disposed between the first positive relay (3351) and the charging negative relay (3357).

11. The electrical compartment according to claim 10, characterized in that, The second overcurrent assembly (830) further includes a precharge relay (3353), which is disposed on the side of the positive charging relay (3359) away from the negative charging relay (3357), and the precharge relay (3353) is electrically connected to the precharge resistor (318).

12. The electrical compartment according to claim 7, characterized in that, The second mounting component (400) further includes a second mounting portion (403), which is bent and connected to the first mounting portion (401). At least a portion of the second mounting portion (403) is located between the first mounting portion (401) and the first mounting component 1305. The second BMS assembly (330) is mounted on the side of the second mounting portion (403) near the second current-carrying assembly (830). The second BMS assembly (330) and the second current-carrying assembly (830) are arranged along the length of the electrical compartment.

13. The electrical compartment according to claim 12, characterized in that, The second BMS component (330) includes a third BMS (331) and a fourth BMS (333), which are arranged along the width direction of the electrical compartment (130).

14. The electrical compartment according to claim 12, characterized in that, The second mounting member (400) further includes a reinforcing part (405), at least a portion of which is located between the first mounting part (401) and the second mounting part (403), and the reinforcing part (405) is connected to the first mounting part (401) and the second mounting part (403) respectively.

15. A battery pack, characterized in that, For use in vehicles, including: The battery compartment (110), the battery module (200), and the electrical compartment as described in any one of claims 1-14, wherein the battery module (200) is mounted on the battery compartment (110); The electrical compartment (130) is connected to the battery compartment (110), and the battery compartment (110) and the electrical compartment (130) are arranged along the length of the battery pack.

16. The battery pack according to claim 15, characterized in that, The battery compartment (110) includes a second bottom wall (1101) and a middle shell (105). The middle shell (105) and the second bottom wall (1101) are arranged along the height direction of the battery pack. The battery module (200) includes a first battery module (210) and a second battery module (230). The first battery module (210) is installed on the side of the middle shell (105) away from the second bottom wall (1101), and the second battery module (230) is installed between the middle shell (105) and the second bottom wall (1101).

17. The battery pack according to claim 16, characterized in that, The electrical compartment (130) includes a first bottom wall (1301) and a first mounting member (1305) disposed opposite to each other. The first mounting member (1305) and the first bottom wall (1301) are arranged along the height direction of the battery pack. The first mounting member (1305) is connected to the middle housing (105).

18. The battery pack according to claim 15, characterized in that, The battery pack also includes a crossbeam (103), at least a portion of which is disposed between the battery compartment (110) and the electrical compartment (130).

19. The battery pack according to claim 18, characterized in that, At least part of the crossbeam (103) is spaced apart from the second mounting part.

20. The battery pack according to claim 17, characterized in that, The first BMS component (310) includes a first BMS (313) and a second BMS (311). The electrical compartment (130) also includes an electrical compartment cover (1307) and a first side wall (1308). The first side wall (1308) is connected to the first bottom wall (1301). The electrical compartment cover (1307) is connected to the first side wall (1308). The first BMS (313) is provided with a wiring part (314). The wiring part (314) is located at the end of the first BMS (313) away from the electrical compartment cover.

21. A vehicle, characterized in that, include: The electrical compartment as described in any one of claims 1-14, or the battery pack as described in any one of claims 15-20.

Images