Electrical cabin, battery pack and vehicle

Abstract

The invention provides an electrical cabin, a battery pack and a vehicle. The electrical cabin comprises an electrical cabin body; and the BMS assembly is installed in the electrical bin body and used for being connected with the battery module, 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] The present invention relates to the technical field of batteries, and particularly to an electrical compartment, a battery pack, and a vehicle. Background Art

[0002] The battery pack is one of the core components of a vehicle. It provides the electrical energy required for the vehicle's electric motor, thereby driving the vehicle to travel. In order to increase the cruising range, battery packs with large power, high voltage, and large current are often used, resulting in a large number of battery cells in series and a large quantity in the battery pack.

[0003] Various electrical components are often provided in the electrical compartment of the battery pack for managing and controlling the operation of the battery modules. In related technologies, when multiple BMSs are included in the electrical compartment, the multiple BMSs are usually arranged along the width direction of the electrical compartment, which causes the multiple BMSs to occupy a large space in the width direction of the electrical compartment. Summary of the Invention

[0004] Embodiments of the present invention provide an electrical compartment, a battery pack, and a vehicle, which can improve the technical problem that multiple BMSs occupy 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, including:

[0006] An electrical compartment body;

[0007] A BMS assembly, installed in the electrical compartment body and used for connecting with the battery modules. The BMS assembly includes a first BMS assembly and a second BMS assembly, wherein the first BMS assembly and the second BMS assembly are arranged along the height direction of the electrical compartment body.

[0008] In a second aspect, embodiments of the present invention provide a battery pack for a vehicle, including:

[0009] A battery compartment body and battery modules, the battery modules being installed in the battery compartment body;

[0010] The electrical compartment as described above, the electrical compartment body being connected to the battery compartment body, and the battery compartment body and the electrical compartment body being arranged along the length direction of the battery pack.

[0011] In a second aspect, embodiments of the present invention provide a battery pack for a vehicle, including the above electrical compartment or the above battery pack.

[0012] Advantageous Effects of Embodiments of the Present Invention:

[0013] In an embodiment of the present invention, the BMS assembly includes a first BMS assembly and a second BMS assembly, wherein the first BMS assembly and the second BMS assembly are arranged along the height direction of the electrical compartment. In this way, compared with the related art where the BMS assemblies are arranged in the width direction of the electrical compartment of the BMS assembly, the space occupied by the first BMS assembly and the second BMS assembly in the width direction of the electrical compartment is smaller in the embodiment of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0015] Figure 1 is a top view of the battery pack provided by the embodiment of the present application.

[0016] Figure 2 is Figure 1 a sectional view taken along the A-A direction in

[0017] Figure 3 is Figure 2 a partial enlarged view at B in

[0018] Figure 4 is a top view of a partial structure of the battery pack provided by the first embodiment of the present invention.

[0019] Figure 5 is Figure 4 a partial enlarged view at C in

[0020] Figure 6 is a top view of a partial structure of the battery pack provided by the second embodiment of the present invention.

[0021] Figure 7 is Figure 6 a sectional view taken along the D-D direction in

[0022] Figure 8 is Figure 1 a partial structure schematic diagram of the electrical compartment in

[0023] Figure 9 is a schematic diagram of a partial structure of the battery pack provided by the third embodiment of the present invention.

[0024] Figure 10 is Figure 9 a partial enlarged view at E in

[0025] Figure 11 is a schematic diagram of a partial structure of the battery pack provided by the fourth embodiment of the present invention.

[0026] Figure 12 is Figure 11 The partial enlarged view at position F in

[0027] Figure 13 The schematic diagram of a partial structure of the battery pack provided by the fifth embodiment of the present invention.

[0028] Figure 14 is Figure 13 The partial enlarged view at position G in

[0029] Figure 15 The circuit diagram of the battery pack provided by the embodiment of the present application.

[0030] Figure 16 The block diagram of the vehicle provided by the embodiment of the present application.

[0031] Description of reference numerals:

[0032] 10. Battery pack; 100. Box assembly; 101. Box body; 102. Battery compartment cover; 103. Cross beam; 105. Middle housing; 109. Mounting housing; 110. Battery compartment body; 1101. Second bottom wall; 111. First cavity; 113. Second cavity; 130. Electrical compartment body; 1301. First bottom wall; 1305. First mounting member; 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 part; 330. Second BMS assembly; 331. Third BMS; 333. Fourth BMS; 315. Shunt; 317. First fuse; 318. Pre-charge resistor; 3351. First positive relay; 3353. Pre-charge relay; 3355. First negative relay; 3357. Charge negative relay; 3359. Charge positive relay;

[0035] 400. Second mounting member; 403. Second mounting part; 401. First mounting part; 405. Reinforcing part;

[0036] 810. First over-current component; 830. Second over-current component;

[0037] 20. Vehicle; 30. Electrical compartment. Detailed implementation manners

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise stated, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the drawings; and "inner" and "outer" refer to the outline of the device.

[0039] The battery pack is one of the core components of a vehicle. It provides the electrical energy required for the vehicle's electric motor, thereby driving the vehicle to travel. In order to increase the driving range, battery packs with large power, high voltage, and large current are often used, resulting in a large number of battery cells in series and a large quantity in the battery pack.

[0040] Various electrical components are often provided in the electrical compartment of the battery pack for managing and controlling the operation of the battery modules. In the related art, when there are multiple BMSs in the electrical compartment, the multiple BMSs are usually arranged along the width direction of the electrical compartment, which causes the multiple BMSs to occupy a large space in the width direction of the electrical compartment.

[0041] To solve the above technical problems, in a first aspect, as Figure 1 shown, an embodiment of the present application provides an electrical compartment, and this electrical compartment 30 is for a battery pack 10. As Figure 2 shown, this electrical compartment 30 includes: an electrical compartment body 130 and a BMS assembly 300. The BMS assembly 300 is installed in the electrical compartment body 130 and is used to connect with the battery modules 200. The BMS assembly 300 includes a first BMS assembly 310 and a second BMS assembly 330, wherein the first BMS assembly 310 and the second BMS assembly 330 are arranged along the height direction of the electrical compartment body 130.

[0042] In the embodiments of the present invention, the BMS assembly 300 includes a first BMS assembly 310 and a second BMS assembly 330, wherein the first BMS assembly 310 and the second BMS assembly 330 are arranged along the height direction of the electrical compartment body 130. In this way, compared with the related art solution of arranging the BMS assembly along the width direction of the electrical compartment body, the first BMS assembly 310 and the second BMS assembly 330 in the embodiment of the present application occupy a smaller space in the width direction of the electrical compartment body.

[0043] In some embodiments, the BMS component 300 is installed inside the electrical compartment 130 and is used to connect to the battery module 200 located outside the electrical compartment 130. The BMS component 300 is installed inside the electrical compartment 130, and the battery module 200 is located outside the electrical compartment 130, avoiding interference of the BMS component 300 with the battery module 200 and facilitating the repair 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] The battery module can be a unit composed of a plurality of battery cells connected in series or in parallel. Some connectors, protection circuits, temperature sensors, etc. can be integrated inside the battery module to ensure safe and efficient energy transmission.

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

[0047] Among them, the BMS component 300, as a battery management system in the battery pack, can have one or more of the following functions, for example: First, it can be used to continuously collect status information about each battery cell in the battery module, such as temperature, voltage, current and other parameters, and evaluate 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), SOP (State of Power), etc. Third, it can prevent the occurrence of problems such as overcharging, overdischarging, and overheating of the battery. For example, when an abnormal situation is detected, it can cut off the circuit or send an alarm signal to the external control system. Fourth, the power level between each battery cell can be balanced by active or passive methods, thereby extending the service life of the entire battery pack. Fifth, it can also be equipped with a standardized communication protocol (such as CAN bus) to exchange data with other on-board electronic devices. The BMS component 300 may include multiple BMSs. For example, the BMS assembly 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 warehouse body 130 includes a first bottom wall 1301 and a first mounting member 1305 that are relatively arranged. The first mounting member 1305 and the first bottom wall 1301 are arranged along the height direction of the electrical warehouse body 130. The first BMS component 310 is located on the side of the first mounting member 1305 that is away from the first bottom wall 1301, and the second BMS component 330 is installed between the first bottom wall 1301 and the first mounting member 1305.

[0049] The first mounting member 1305 is provided to facilitate installation of the first BMS assembly 310. By locating the first BMS assembly 310 on the side of the first mounting member 1305 away from the first bottom wall 1301, and installing the second BMS assembly 330 between the first bottom wall 1301 and the first mounting member 1305, the first BMS assembly 310 and the second BMS assembly 330 are arranged along the height direction of the electrical compartment body 130.

[0050] Please combine Figure 4 and Figure 5 In some embodiments, the first BMS assembly 310 includes a first BMS 313 and a second BMS 311. The first BMS 313 and the second BMS 311 are arranged along the length direction of the electrical compartment body 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, so as to collect the current and voltage of multiple battery cells of 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 body 130, and manage and control the working status of the electrical components in the electrical compartment body 130, thereby managing and controlling the working status of each battery cell of the battery module 200.

[0052] In some embodiments, the electrical compartment further includes a plurality of electrical components, and the electrical compartment body 130 accommodates the plurality of electrical components, and the plurality of electrical components may include a first overcurrent component 810 and a second overcurrent component 830 .

[0053] Please combine Figure 7 And 8, the electrical compartment includes a first overcurrent component 810, which is used to be electrically connected to the battery module 200, and the first overcurrent component 810 is installed on the side of the first mounting member 1305 away from the first bottom wall 1301, and the first overcurrent 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-passing component 810 includes a shunt 315, which is used to be electrically connected to the battery module 200 and is arranged along the width direction of the electrical compartment body with the first BMS component 310.

[0055] Shunts can be used to monitor current changes during the charging and discharging process of battery modules. Specifically, shunts can measure large currents by directing a small portion of the current to the measuring instrument. A shunt is essentially a precision resistor with a very low resistance value. When a DC current flows through it, a small voltage drop proportional to the current magnitude is generated across it. This voltage drop can be detected by a millivoltmeter or other measuring device connected to its two ends and converted into a corresponding current reading. This design allows the shunt to effectively expand the measurement range of the ammeter because it allows most of the current to bypass the ammeter and pass directly through the shunt, with only a small portion of the current flowing through the ammeter, thereby avoiding the risk of damage to the ammeter due to overload. The shunt can be made of manganese copper material with a small resistance temperature coefficient and high resistivity to ensure a stable resistance value under different temperature conditions2. This helps to improve measurement accuracy and reduce errors caused by changes in ambient temperature.

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

[0057] The first fuse can serve as the first line of defense to protect the battery module from short circuits and other abnormal current conditions. When a severe overcurrent or short circuit event occurs, the first fuse can respond and cut off the circuit within an extremely short time to prevent potential safety risks such as fires or explosions. The main functions of the first fuse can be as follows: when there is a high multiple overcurrent or short circuit in the high-voltage circuit, the first fuse will quickly blow, thus immediately interrupting the fault current path to ensure the safety of the battery module; the first fuse can also handle a long-term continuous overload state. If the actual working current of the system exceeds the set safety threshold but is not high enough to trigger an immediate blow, the fuse can still provide a certain degree of protection; the first fuse can work in coordination 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 relay to manage; and in the face of higher multiple transient peak currents, the fuse can be relied on for emergency cut-off.

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

[0059] Please refer to Figure 8 , the electrical compartment further includes a second overcurrent component 830, the second overcurrent component 830 is mounted on a side of the first mounting portion 401 facing away from the first bottom wall 1301, and the second overcurrent component 830 is electrically connected to the first overcurrent component 810.

[0060] The second overcurrent component 830 is mounted on a side of the first mounting portion 401 of the second mounting member 400 facing away from the first bottom wall 1301, and the first overcurrent component 810 is mounted on a side of the first mounting member 1305 facing 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, so that the first overcurrent component 810 and the second overcurrent component 830 are arranged along the height direction of the electrical compartment 130.

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

[0062] The charging positive relay 3359 can be installed between the positive electrode of the battery module and the charging circuit. When the vehicle needs to be charged, the charging positive relay 3359 is closed to form a positive current path from the charging pile to the battery module; when the charging process is completed or a fault is detected, it will be disconnected to cut off the current to ensure safety.

[0063] The negative charging relay 3357 can be installed on the negative side of the battery module and work in conjunction with the positive charging relay 3359. The negative charging relay 3357 can provide a complete circuit during the charging process and be disconnected in the non-charging state to prevent any unnecessary current flow, thereby avoiding potential safety hazards such as short circuit or overheating.

[0064] In some embodiments, the second overcurrent component 830 also 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, 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 away from 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 is started or requires electric drive, the first positive relay 3351 is closed, allowing current to flow to the motor controller and other high-voltage loads. In non-operating states, emergencies, or when performing maintenance, the first positive relay 3351 is disconnected 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 body ground. 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 be closed when needed to complete the circuit, and disconnected when power is not needed or a fault occurs to cut off the loop and avoid possible short circuits or other electrical hazards.

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

[0068] The pre-charge resistor 318 can limit the inrush current. When the main relay between the battery module and the motor controller closes, since the large-capacity capacitor bank in the motor controller is in an uncharged state, a low-impedance path will be formed, which may result in a very large transient current (inrush current). The pre-charge resistor 318 can effectively limit this initial current so that it does not exceed the safety threshold, avoiding damage to the capacitors and other circuit components. The pre-charge resistor 318 can also protect the electronic components. By gradually charging the capacitors in the motor controller, the pre-charge resistor helps ensure that these components are not damaged due to sudden high voltage. This not only extends the service life of the electronic devices but also improves the reliability of the system. The pre-charge resistor 318 can also stabilize the power supply voltage. The pre-charge process enables the motor controller and its related circuits to reach the operating voltage smoothly instead of experiencing drastic voltage changes. This is very important for maintaining the stability of the entire electric drive system. The pre-charge resistor 318 can also include a corresponding monitoring mechanism to ensure that only after the capacitors are fully charged and the system is in a stable state, the first positive relay and the first negative relay will be closed to directly connect the battery to the motor controller and other loads.

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

[0070] In some embodiments, the pre-charge relay 3353 can gradually build up the 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 pre-charge relay 3353 closes, a current path is formed through the pre-charge resistor 318, enabling the capacitors to be gradually charged until the voltage across them approaches the voltage of the power battery. This process prevents large current surges caused by the initially low voltage state of the capacitor bank. The pre-charge relay 3353 can protect electronic components: By limiting the initial inrush current, the pre-charge relay 3353 and the pre-charge 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 service life of these components and improve the reliability of the system. The pre-charge relay 3353 can stabilize the power supply system. The pre-charge process ensures that the electric drive system can start smoothly without drastic voltage changes, thus maintaining the stability of the entire electrical system. The pre-charge relay 3353 can support safe operation. The pre-charge relay usually works in conjunction with the monitoring mechanism in the control system. After the capacitors are fully charged and the system voltage is stable, the first positive relay and the first negative relay are closed to directly connect the battery module to the motor controller and other loads, avoiding potential risks that may be caused by large currents. The pre-charge relay 3353 can reduce electromagnetic interference. By controlling the current to increase gradually instead of reaching the peak instantaneously, the pre-charge relay also helps reduce electromagnetic interference generated during startup, which is very important for maintaining the normal operation of other electronic devices in the vehicle.

[0071] Please refer to Figure 8 , in some embodiments, the second mounting member 400 further includes a second mounting portion 403. The second mounting portion 403 is bent and connected to the first mounting portion 401. At least a part 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 a side of the second mounting portion 403 close to the second overcurrent component 830. The second BMS component 330 and the second overcurrent component 830 are arranged along the length direction of the electrical compartment.

[0072] The second mounting portion 403 is bent and connected to the first mounting portion 401. The angle between the second mounting portion 403 and the first mounting portion 401 can be ninety degrees. The connection between the second mounting portion 403 and the first mounting portion 401 can be by welding, bonding or other means, or it can be an integrally formed structure.

[0073] The second BMS component 330 is installed on one side of the second installation part 403 close to the second overcurrent component 830, and the second BMS component 330 and the second overcurrent component 830 are arranged along the length direction of the electrical compartment. At the same time, multiple electrical components of the second overcurrent 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, the pre-charge relay 3353, etc., are generally arranged along the width direction of the electrical compartment. Thereby, the second BMS component 330 and the second overcurrent component 830 installed on the second installation part 400 have a compact structure and good electrical clearance.

[0074] Please refer to Figure 6 and Figure 7 , in some embodiments, the second BMS component 330 includes a third BMS 331 and a fourth BMS 333, and the third BMS 331 and the fourth BMS 333 are arranged along the width direction of the electrical compartment 130. This can cooperate with the second overcurrent component 830 arranged along the width direction of the electrical compartment, make full use of the space in all directions of the second installation part 400, and set good electrical clearance between the third BMS 331 and the fourth BMS 333.

[0075] The third BMS 331 and the fourth BMS 333 can be electrically connected to the first BMS 313 respectively.

[0076] The third BMS 331 and the fourth BMS 333 can be used as slave BMSs to cooperate with the second BMS 311 to collect the current, voltage, etc. of multiple battery cells of the battery module 200. In this application, one main BMS and three slave BMSs are set, and the current, voltage, etc. of multiple battery cells of the battery module 200 are collected through the three slave BMSs. In some other examples, two slave BMSs or four slave BMSs can also be provided, which can be specifically set according to the number of battery cells of the battery module.

[0077] The second BMS 311 is used to be electrically connected to the battery module 200, so as to collect the current and voltage of multiple battery cells of the battery module 200. The first BMS 313 can be used to manage and control the second BMS 311, 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 states of electrical components in the electrical compartment 130, so as to manage and control the working states of each battery cell of the battery module 200.

[0078] In some embodiments, the second installation part 400 further includes a strengthening part 405, and at least part of the strengthening part 405 is located between the first installation part 401 and the second installation part 403, and the strengthening part 405 is respectively connected to the first installation part 401 and the second installation part 403.

[0079] Since the second overcurrent component 830 is installed on the side of the first mounting portion 401 away from the first bottom wall 1301, and the first overcurrent component 810 is installed on the side of the first mounting member 1305 away from the first bottom wall 1301, in order to keep the second mounting member 400 stable all the time, a reinforcing portion 405 is provided. In this way, the first mounting portion 401 and the second mounting portion 403 are supported by the reinforcing portion 405, making the whole second mounting member 400 more stable.

[0080] To solve the above technical problems, in a first aspect, an embodiment of the present application provides a battery pack 10, which is used for a vehicle. The vehicle can be a fuel vehicle, a plug-in hybrid vehicle or a new energy vehicle, etc. The present disclosure does not make specific limitations on this.

[0081] Please refer to Figure 1 and Figure 2 , in some embodiments, the battery pack 10 may include:

[0082] A battery compartment body 110 and a battery module 200, and the battery module 200 is installed in the battery compartment body 110; the battery module 200 can be a unit composed of a plurality of battery cells connected in series or in parallel. Some connectors, protection circuits, temperature sensors, etc. can be integrated inside the battery module 200 to ensure safe and efficient energy transmission.

[0083] The battery pack 10 further includes the above-mentioned electrical compartment, the electrical compartment body 130 is connected to the battery compartment body 110, and the battery compartment body 110 and the electrical compartment body 130 are arranged along the length direction of the battery pack.

[0084] Since there are many electrical devices (such as an engine, an internal combustion engine, etc.), cross beams and longitudinal beams in the vehicle, the space in the width direction of the vehicle is usually relatively tight. In the embodiments of the present invention, the BMS component includes a first BMS component 310 and a second BMS component 330, and the first BMS component 310 and the second BMS component 330 are arranged along the height direction of the vehicle. In this way, compared with the related art where multiple BMSs are arranged along the width direction of the vehicle, the first BMS component 310 and the second BMS component 330 in the embodiment of the present application occupy less space in the width direction of the vehicle. Thus, the overall space occupied by the battery pack in the width direction of the vehicle is reduced. Since the battery module 200 is installed in the battery compartment body and the BMS component is installed in the electrical compartment body, the BMS component 300 and the battery module 200 are arranged along the length direction of the vehicle, which can make full use of the height direction and the length direction of the vehicle, making the structure of the battery pack 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 space occupied by the first BMS component 310 and the second BMS component 330 in the width direction of the battery pack is small. Further, 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 space occupied by the first BMS component 310 and the second BMS component 330 in the width direction of the vehicle is small.

[0086] In the present application, on the first hand, the battery compartment body 110 and the electrical compartment body 130 are arranged along the length direction of the electrical compartment body 130. Electrical components such as the first overcurrent component 810 and the second overcurrent component 830 are arranged in the electrical compartment body 130 without occupying the space of the battery compartment body 110, so that the battery compartment body 110 can have a larger space to accommodate the battery module 200, so that the battery module 200 can have a larger volume, so that the number of battery cell strings in the battery pack is large and the quantity is large. Furthermore, the battery pack can have a larger electric quantity, a higher voltage, and a larger current. Thus, the cruising range is increased.

[0087] On the second hand, the first BMS component 310 and the second BMS component 330 in the electrical compartment body 130 are arranged along the height direction of the electrical compartment body 130, with a compact structure, reducing the occupation of the length direction of the electrical compartment body 130 by the first BMS component 310 and the second BMS component 330, and reducing the extrusion of the battery compartment body 110.

[0088] On the third hand, the first overcurrent component 810 and the second overcurrent component 830 in the electrical compartment body 130 are arranged along the height direction of the electrical compartment body 130, with a compact structure, further reducing the occupation of the length direction of the electrical compartment body 130 by the electrical components in the electrical compartment body 130, and reducing the extrusion of the battery compartment body 110.

[0089] In some examples, please refer to Figure 1 and Figure 2 , the battery pack 10 may include a box body component 100, and the battery compartment body 110 and the electrical compartment body 130 may be two parts connected to the box body component 100. Please refer to Figure 2, the box body assembly 100 may include a connected battery compartment body 110 and an electrical compartment body 130. The battery module 200 is installed in the battery compartment body 110, and the BMS assembly 300 is installed in the electrical compartment body 130. In this way, the BMS assembly 300 and the battery module 200 can be arranged along the length direction of the vehicle, and the first BMS assembly 310 and the second BMS assembly 330 are arranged along the height direction of the vehicle, which can make full use of the height direction and the length direction of the vehicle, making the structure of the battery pack more compact.

[0090] Please refer to Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14 , in some embodiments, the battery compartment body 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 body). The battery module 200 includes a first battery module 210 and a second battery module 230. The first battery module 210 is installed on one 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 refer to Figure 3 , in some embodiments, the middle housing 105 can be connected to the mounting housing 109 by welding, screwing, clamping or other means. The middle housing 105 can divide the space inside the battery compartment body 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 body 110 further includes a battery compartment cover 102. The first cavity 111 can be located between the middle housing 105 and the battery compartment cover 102, and the second cavity 113 can be located on the side of the middle housing 105 away from the battery compartment cover 102.

[0092] Among them, 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, so that the first battery module 210 and the second battery module 230 are arranged along the height direction of the vehicle. In these embodiments, the battery pack 10 belongs to a double-layer box structure design, and the internal space of the battery compartment 110 is divided into a first cavity 111 and a second cavity 113 arranged along the height direction of the vehicle, thereby saving space in the horizontal direction. This makes the area occupied by the battery pack in the horizontal direction smaller, so that the space in the battery pack where the battery modules can be installed is larger, enabling the number of battery cells to be increased more, and improving the driving range of the battery pack.

[0095] The middle housing 105 may include a battery module tray for the first battery module 210. Thus, the middle housing 105 can provide functions of 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 also be provided. For example, a third battery module 240 and a fourth battery module 250 may also be included. The third battery module 240 and the first battery module 210 are arranged along the length direction of the vehicle, and a cross beam 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 direction of the vehicle, and a cross beam 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 direction 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, so that the battery pack can have a larger power, 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 may be connected by means such as screwing, clamping, 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. The first mounting member 1305 and the middle housing 105 may be integrally formed.

[0100] In some embodiments, the second bottom wall 1101 is located on a side of the middle housing 105 away from 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, and can protect the second battery module 230 and reduce the impact and vibration of the second battery module 230.

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

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

[0103] The housing 101 may be formed into a mounting cavity structure by stamping, or may be formed by connecting different parts of the housing 101. The crossbeam and the housing may be connected by screw connection, welding, clamping, etc. The housing 101 may specifically include a mounting shell and a cover, and a mounting cavity may be formed between the mounting shell and the cover. The crossbeam 103 may be connected to the mounting shell 109. The crossbeam 103 may be connected to the mounting shell 109 by welding, screw connection, clamping, etc.

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

[0105] By arranging the crossbeam between the battery compartment 110 and the electrical compartment 130, the volume expansion problem of the battery cell of the battery module caused by temperature change during the charging and discharging process can be solved. In addition, the crossbeam can also enhance the structural strength of the battery pack and provide additional protection when the vehicle is in a side collision.

[0106] In some embodiments, the second mounting portion 403 is spaced apart from the crossbeam 103 , thereby preventing the battery module in the battery compartment 110 from expanding and squeezing the second BMS assembly 330 .

[0107] In some embodiments, an elastic member such as foam may be placed between the second mounting member 400 and the crossbeam 103 to avoid the influence of the 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 side wall 1308. The first side wall 1308 is connected to the first bottom wall 1301, and the electrical compartment cover 1307 is connected to the first side wall 1308. The first BMS 313 is provided with a wiring portion 314, and the wiring portion 314 is located at an end of the first BMS 313 away from the electrical compartment cover 1307. This enables the wiring harness to be connected to the wiring portion 314 from the end away from the electrical compartment cover 1307, and then to be connected to the first BMS 313 through the wiring portion 314, avoiding interference between the wiring harness and the electrical compartment cover 1307.

[0109] The first side wall 1308 and the first bottom wall 1301 may be connected by means such as welding or bonding, or may be integrally formed. The electrical compartment cover 1307 and the first side wall 1308 may be detachably connected, such as by screwing or clamping.

[0110] The first BMS 313 is provided with a wiring portion 314, and the wiring portion 314 is located at an end of the first BMS 313 away from the electrical compartment cover 1307. This enables the wiring harness to be connected to the wiring portion 314 from the end away from the electrical compartment cover 1307, and then to be connected to the first BMS 313 through the wiring portion 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 BMS 313 through the wiring portion 314, and the other end of the wiring harness can be connected to the electrical components in the electrical compartment, so that the electrical components in the electrical compartment can be electrically connected to the first BMS 313, and the first BMS 313 can collect the current and voltage of the electrical components in the electrical compartment, thereby realizing the management and control of the working state of the electrical components in the electrical compartment 30.

[0111] In a third aspect, please refer to Figure 16 , an embodiment of the present application further provides a vehicle 20, including the above-mentioned battery pack 10.

[0112] The above has introduced the embodiments of the present invention in detail. Specific examples are used in this article to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An electrical warehouse, characterized in that: For battery packs, including: Electrical compartment body (130); The BMS component (300) is installed in the electrical compartment body (130) and is used to connect with the battery module (200). 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).

2. The electrical warehouse according to claim 1, characterized in that: The electrical warehouse body (130) includes a first bottom wall (1301) and a first mounting member (1305) that are arranged opposite to each other. The first mounting member (1305) and the first bottom wall (1301) are arranged along the height direction of the electrical warehouse body (130). The first BMS component (310) is located on the side of the first mounting member (1305) that is 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 warehouse according to claim 2, characterized in that: The first BMS assembly (310) includes a first BMS (313) and a second BMS (311), the first BMS (313) and the second BMS (311) are arranged along the length direction of the electrical compartment body (130), the first BMS (313) and the second BMS (311) are electrically connected, and the second BMS (311) is used to be electrically connected to the battery module (200).

4. The electrical warehouse according to claim 2, characterized in that: The electrical warehouse also includes a first overcurrent component (810), which is used to be electrically connected to the battery module. The first overcurrent component (810) is installed on the side of the first mounting member (1305) facing away from the first bottom wall (1301). The first overcurrent component (810) and the first BMS component (310) are arranged along the width direction of the electrical warehouse body.

5. The electrical warehouse according to claim 4, characterized in that: The first current-passing component (810) includes a shunt (315), which is used to be electrically connected to the battery module and is arranged along the width direction of the electrical compartment body together with the first BMS component (310).

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

7. The electrical warehouse according to claim 6, characterized in that: The electrical warehouse body (130) further includes a second mounting member (400), wherein the second mounting member (400) is located between the first bottom wall (1301) and the first mounting member (1305); The second mounting member comprises a first mounting portion (401), wherein the first mounting portion (401) is mounted on the first bottom wall (1301) and is arranged opposite to the first bottom wall (1301). The electrical compartment also includes a second overcurrent component (830), which is installed on the side of the first installation portion (401) away from the first bottom wall (1301), and the second overcurrent component (830) is electrically connected to the first overcurrent component (810).

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

9. The electrical warehouse according to claim 8, characterized in that: The second overcurrent component (830) also includes a first positive relay (3351) and a first negative relay (3355), wherein 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, and 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 warehouse according to claim 9, characterized in that: The second overcurrent component also includes a pre-charging resistor (318), which is electrically connected to the first fuse (317), and the pre-charging resistor (318) is arranged between the first positive relay (3351) and the charging negative relay (3357).

11. The electrical warehouse according to claim 10, characterized in that: The second overcurrent component (830) also includes a pre-charging relay (3353), which is arranged on a side of the charging positive relay (3359) away from the charging negative relay (3357), and the pre-charging relay (3353) is electrically connected to the pre-charging resistor (318).

12. The electrical warehouse according to claim 7, characterized in that: The second mounting member (400) also includes a second mounting portion (403), the second mounting portion (403) is bent and connected to the first mounting portion (401), at least part 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 installed on the side of the second mounting portion (403) close to the second overcurrent component (830), and the second BMS component (330) and the second overcurrent component (830) are arranged along the length direction of the electrical compartment body.

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

14. The electrical warehouse according to claim 12, characterized in that: The second mounting member (400) further comprises a reinforcing portion (405), at least a portion of the reinforcing portion (405) being located between the first mounting portion (401) and the second mounting portion (403), and the reinforcing portion (405) being connected to the first mounting portion (401) and the second mounting portion (403), respectively.

15. A battery pack, characterized in that: For vehicles, including: A battery compartment body (110), a battery module (200), and an electrical compartment according to any one of claims 1 to 14, wherein the battery module (200) is installed in the battery compartment body (110); The electrical compartment body (130) is connected to the battery compartment body (110), and the battery compartment body (110) and the electrical compartment body (130) are arranged along the length direction of the battery pack.

16. The battery pack according to claim 15, characterized in that: The battery compartment body (110) includes a second bottom wall (1101) and a middle shell (105), wherein the middle shell (105) and the second bottom wall (1101) are arranged along the height direction of the battery pack, and the battery module (200) includes a first battery module (210) and a second battery module (230), wherein the first battery module (210) is installed on a side of the middle shell (105) facing 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 body (130) includes a first bottom wall (1301) and a first mounting member (1305) that are arranged 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, and the first mounting member (1305) is connected to the middle shell (105).

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

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

20. The battery pack according to claim 17, characterized in that: The first BMS assembly (310) includes a first BMS (313) and a second BMS (311), the electrical compartment body (130) further 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 portion (314), and the wiring portion (314) is located at one end of the first BMS (313) away from the electrical compartment cover.

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

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