Battery pack and electric equipment

Abstract

The invention provides a battery pack and electric equipment. The battery pack comprises a box body, a battery pack and an electrical part bracket, the box body comprises a bottom shell and at least two beams connected into the bottom shell. The at least two beams are arranged side by side in the first horizontal direction and extend in the second horizontal direction perpendicular to the first direction. The battery pack includes a plurality of battery cells arranged side by side, and the battery pack is located between two of the at least two beams. The electrical part support comprises a supporting body used for supporting electrical parts, the supporting body is fixedly arranged above the battery pack, a gap is formed between the supporting body and the battery pack, and the electrical part support is connected to the two beams. The battery pack can improve the utilization rate, safety and reliability of the internal space of the battery pack. The electric equipment comprises the battery pack, and the battery pack provides power for the electric equipment.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack and an electrical device. Background Art

[0002] In the battery pack of related technology, due to space and power constraints, it is usually necessary to fix electrical components such as BDU (Battery Disconnection Unit) and BMS (Battery Management System) on the electrical component bracket above the battery pack. The electrical component bracket is connected to the bottom shell of the battery pack box. When the battery pack is impacted, the electrical component bracket has a large displacement, which is easy to hit the battery pack below, causing the battery pack to short-circuit and increase the risk of thermal runaway of the battery pack.

[0003] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art. Summary of the invention

[0004] The purpose of the present application is to provide a battery and electrical equipment, aiming to solve the problem that when the battery pack is impacted, the electrical component bracket has a large displacement, which is easy to hit the battery pack below, easily causing the battery pack to short-circuit and increase the risk of thermal runaway of the battery pack.

[0005] In a first aspect, the present application provides a battery pack, comprising: a box body, the box body comprising a bottom shell and at least two beams connected to the bottom shell, the at least two beams are arranged side by side along a first horizontal direction and extend along a second horizontal direction perpendicular to the first direction; a battery pack, comprising a plurality of battery cells arranged side by side, the battery pack is located between two of the at least two beams; and an electrical component bracket, comprising a supporting body for supporting the electrical component, the supporting body is fixedly arranged above the battery pack and has a gap between the battery pack, and the electrical component bracket is connected to the two beams.

[0006] In the battery pack of the present application, the battery pack is located between two beams, and the electrical component bracket is connected to the two beams. On the one hand, the electrical component bracket is fixed to the bottom shell by utilizing the two beams, so the internal space of the battery pack can be fully utilized. On the other hand, the distance between the supporting body and the beam is relatively close, and the electrical component bracket is easy to be fixedly connected to the beam more stably. When the battery pack is impacted, it is not easy to be displaced or the displacement is small. Even if the electrical component bracket is displaced to a certain extent due to the severe impact on the battery pack, due to the protection of the two beams, the electrical component bracket is not easy to collide with the battery pack, or even if a collision occurs, the force is small, which is conducive to reducing the short circuit of the battery pack caused by the large displacement of the electrical component bracket hitting the battery pack, and reducing the risk of thermal runaway of the battery pack. Therefore, the utilization rate and safety reliability of the internal space of the battery pack can be improved.

[0007] In the battery pack of some embodiments, first side vents connected to the gap are respectively provided between the two ends of the support body along the first direction and the two beams; and / or second side vents connected to the gap are respectively provided between the two ends of the support body along the second horizontal direction and the battery pack; and / or a through hole connecting the upper and lower sides of the support body is provided on the support body.

[0008] Once thermal runaway occurs in the battery pack, the hot gas and particulate matter generated by the thermal runaway need to be discharged. The first side vent, the second side vent and the through hole provided in the battery pack are conducive to the smooth discharge of the hot gas and particulate matter after the thermal runaway, and reduce the residence time of the hot gas and particulate matter in the interval between the support body and the battery pack, prevent local overheating or insulation protection failure, and reduce the further adverse effects of the hot gas and particulate matter on the battery pack, thereby helping to improve the safety and reliability of the battery pack.

[0009] In some embodiments of the battery pack, the electrical component bracket includes a plurality of legs respectively connected to both ends of the support body along a first horizontal direction, each leg is connected between a corresponding end of the support body and a beam below the corresponding end, and forms a first side vent with the corresponding end and the beam below the corresponding end.

[0010] By providing a support leg to connect the support body and the beam, the support leg occupies less space, so that the first side vent can have a larger flow area, which is conducive to the smooth discharge of hot gas and particulate matter from the first side vent after thermal runaway, and reduces the residence time of hot gas and particulate matter in the interval between the support body and the battery pack, preventing local overheating or insulation protection failure, and reducing further adverse effects of hot gas and particulate matter on the battery pack, thereby helping to improve the safety and reliability of the battery pack.

[0011] In the battery pack of some embodiments, the legs on the two beams are staggered along the second direction; and / or the two ends of the support body are suspended below along the second direction.

[0012] The legs on the two beams are staggered along the second direction so that hot gas and particulate matter at any position along the second direction can be discharged from the first side vent in time after thermal runaway, thereby helping to improve the safety and reliability of the battery pack.

[0013] The two ends of the support body are suspended in the air along the second direction, which is beneficial for the second side vent to have a larger flow area. Hot gas and particulate matter can be discharged from the second side vent in time, thereby improving the safety and reliability of the battery pack.

[0014] In the battery pack of some embodiments, the legs are made of strips, and the thickness direction of the strips is perpendicular to the first direction.

[0015] The support legs are made of slats, and the thickness direction of the slats is perpendicular to the first direction, so that the support legs can occupy as little ventilation area between the support body and the beam as possible, which is more conducive to the timely discharge of hot gas and particulate matter from between the support body and the beam after thermal runaway, thereby helping to improve the safety and reliability of the battery pack.

[0016] In the battery pack of some embodiments, the support leg includes: a first slat segment extending along the second direction; two second slat segments extending along the second direction and respectively located below the two ends of the first slat segment along the second direction; and two third slat segments extending along a third direction perpendicular to the first direction and the second direction and respectively located at the two ends of the first slat segment along the second direction, the third slat segment connecting a corresponding end of the first slat segment and an end of the second slat segment adjacent to the corresponding end.

[0017] The support leg includes a first slat segment, two second slat segments and two third slat segments, so that the support leg is not easily deformed along the first direction, the second direction and the third direction, which is beneficial to reducing the displacement of the supporting body that may occur when the battery pack is impacted, thereby helping to improve the safety and reliability of the battery pack.

[0018] In the battery pack of some embodiments, the support body is a mounting plate for supporting electrical components.

[0019] The support body is a mounting plate for supporting electrical components, which is beneficial to improving the utilization rate of the internal space of the battery pack and also conducive to forming a first side vent and a second side vent with a larger flow area, so as to be more conducive to the timely discharge of hot gas and particulate matter after thermal runaway from between the support body and the battery pack or beam, thereby helping to improve the safety and reliability of the battery pack.

[0020] In the battery pack of some embodiments, the battery pack includes a plurality of electrical component brackets arranged side by side along a first direction; and / or the battery pack includes a plurality of electrical component brackets arranged side by side along a second direction.

[0021] By providing a plurality of electrical component brackets, the flexibility of the internal structural layout of the battery pack and the flexibility of the electrical component layout can be increased, which is beneficial to improving the utilization rate of the internal space of the battery pack.

[0022] In the battery pack of some embodiments, the battery cell includes an explosion-proof valve disposed on the top thereof, and at least one through hole is disposed corresponding to the at least one explosion-proof valve, respectively.

[0023] At least one through hole is respectively arranged corresponding to at least one explosion-proof valve, which facilitates at least part of the hot gas ejected from the explosion-proof valve to be discharged directly from the corresponding through hole, and helps to reduce the residence time of the hot gas in the gap between the support body and the battery pack, thereby facilitating improving the safety and reliability of the battery pack.

[0024] In the battery pack of some embodiments, the through hole has the same shape as the exhaust port of the corresponding explosion-proof valve; and / or the flow area of ​​the through hole is larger than the flow area of ​​the exhaust port of the corresponding explosion-proof valve.

[0025] The through hole has the same shape as the exhaust port of the corresponding explosion-proof valve, and the flow area of ​​the through hole is larger than the flow area of ​​the exhaust port of the corresponding explosion-proof valve, which is beneficial for the hot gas ejected from the explosion-proof valve to be quickly discharged directly from the corresponding through hole, thereby improving the safety and reliability of the battery pack.

[0026] A second aspect of the present application provides an electrical device, comprising the battery pack of the first aspect of the present application, wherein the battery pack is used to provide power to the electrical device.

[0027] The electrical equipment provided in this application has the same advantages as the battery pack provided in this application.

[0028] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0030] Figure 1 This is a schematic diagram of the structure of electrical equipment in some embodiments of the present application.

[0031] Figure 2 A schematic diagram of the structure of a battery pack provided for some embodiments of the present application, wherein the box cover is not shown.

[0032] Figure 3 This is a schematic diagram of the structure of a battery cell of a battery pack according to some embodiments of the present application.

[0033] Figure 4 A schematic diagram of the top view of the battery pack provided for some embodiments of the present application, wherein the box cover is not shown.

[0034] Figure 5 A schematic structural diagram of the support legs of an electrical component bracket of a battery pack according to some embodiments of the present application.

[0035] Figures 1 to 5 In the figure, each reference numeral represents: D. Electrical equipment; B. Battery pack; 1. Box body; 11. Bottom shell; 13. Beam; 2. Battery pack; 20. Battery cell; 201. Housing; 202. End cover; 203. Electrode terminal; 204. Explosion-proof valve; 3. Electrical component bracket; 31. Support body; 311. Through hole; 32. Support foot; 321. First slat segment; 322. Second slat segment; 323. Third slat segment; V1, first side vent; V2, second side vent. DETAILED DESCRIPTION

[0036] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0037] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0038] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0039] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0040] In the process of developing this application, the inventors found that, as described in the background art, when the battery pack of the related art is impacted, the electrical component bracket is prone to large displacement, which is easy to hit the battery pack below, causing the battery pack to short-circuit, and increasing the risk of thermal runaway of the battery pack. In addition, the design of the electrical component bracket of the battery pack of the related art does not take into account the problem of the electrical component bracket blocking the exhaust channel for discharging hot gases and particulate matter after the battery pack has thermal runaway, resulting in the hot gas and particulate matter not being discharged in time, which may cause additional secondary disasters to the battery pack, causing the battery pack to further thermal runaway, or even fire, causing damage to electrical equipment such as vehicles and related personnel such as drivers.

[0041] Therefore, the present application proposes a battery pack, which can solve the related problems caused by the deformation and large displacement of the electrical component bracket when the battery pack is impacted by reasonably setting the position, structure and connection method of the electrical component bracket, and further solve the problem of blockage of the exhaust passage after thermal runaway of the electrical component bracket in the battery pack, thereby further improving the utilization rate and safety reliability of the internal space of the battery pack. Furthermore, the present application also proposes an electrical device including the battery pack.

[0042] The battery pack is configured to provide electrical energy to electrical devices. Electrical devices may be, but are not limited to, mobile phones, portable devices, laptop computers, battery vehicles, electric vehicles, ships, spacecraft, electric toys, and electric tools, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0043] A battery pack is a single physical module that includes one or more battery cells to provide higher voltage and capacity. A battery pack generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0044] A battery cell refers to the smallest unit that makes up a battery. In the present application, battery cells may include lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application. Battery cells may be flat, rectangular, or in other shapes, which are not limited in the embodiments of the present application. Battery cells are generally packaged as square battery cells and soft-pack battery cells, which are not limited in the embodiments of the present application.

[0045] The battery pack also includes electrical components such as BDU and BMS. BDU has multiple functions such as charge and discharge control, power-on control of high-voltage components, circuit overload and short-circuit protection, high-voltage sampling and low-voltage control. Its main function is to provide power management and protection for the high-voltage system of electrical equipment to ensure the stable operation of the high-voltage system. BMS is mainly used to monitor parameters such as voltage, temperature and current of battery cells, realize balanced charge and discharge, protection and fault diagnosis of batteries, and ensure the safety and stability of the battery pack. Electrical components such as BDU and BMS are carried and fixed on the top of the battery pack through electrical component brackets.

[0046] In the description of this application, the first direction X is a horizontal direction, and the first direction X corresponds to Figure 2 The front-to-back direction in Figure 4 The left and right directions in the figure also correspond to the length direction of the battery pack; the second direction Y is a horizontal direction perpendicular to the first direction X, and the second direction Y corresponds to Figure 2 The left and right directions in Figure 4 The up and down directions in the figure also correspond to the width direction of the battery pack; the third direction Z is the vertical direction, corresponding to Figure 2 The up and down directions in Figure 4 The direction perpendicular to the paper also corresponds to the height direction of the battery pack.

[0047] like Figure 2 and Figure 4 As shown, the battery pack B provided in the embodiment of the present application includes a case 1, a battery pack 2 and an electrical component bracket 3. The case 1 includes a bottom shell 11 and at least two beams 13 connected to the bottom shell 11. The at least two beams 13 are arranged side by side along a horizontal first direction X, and extend along a horizontal second direction Y perpendicular to the first direction X. The battery pack 2 includes a plurality of battery cells 20 arranged side by side, and the battery pack 2 is located between two beams 13 of the at least two beams 13. The electrical component bracket 3 includes a support body 31 for supporting electrical components, the support body 31 is fixedly arranged above the battery pack 2 and has a gap with the battery pack 2, and the electrical component bracket 3 is connected to the two beams 13.

[0048] In the battery pack of the embodiment of the present application, the battery pack 2 is located between the two beams 13, and the electrical component bracket 3 is connected to the two beams 13. On the one hand, the electrical component bracket 3 is fixed to the bottom shell 11 by using the two beams 13, and the internal space of the battery pack can be fully utilized. On the other hand, the distance between the supporting body 31 and the beam 13 is relatively close, and the electrical component bracket 3 is easy to be fixedly connected to the beam 13 more stably. When the battery pack is impacted, it is not easy to be displaced or the displacement is small. Even if the electrical component bracket 3 is displaced to a certain extent due to the severe impact on the battery pack, due to the protection of the two beams 13, the electrical component bracket 3 is not easy to collide with the battery pack 2, or even if a collision occurs, the collision force is small, which is conducive to reducing the short circuit phenomenon of the battery pack 2 caused by the large displacement of the electrical component bracket hitting the battery pack 2, and reducing the risk of thermal runaway of the battery pack. Therefore, the utilization rate and safety reliability of the internal space of the battery pack can be improved.

[0049] like Figure 2 and Figure 4 As shown, in the battery pack B of some embodiments, first side vents V1 connected to the gap are respectively provided between the two ends of the support body 31 along the first direction X and the two beams 13; and / or second side vents V2 connected to the gap are respectively provided between the two ends of the support body 31 along the horizontal second direction Y and the battery pack 2; and / or a through hole 311 connecting the upper and lower sides of the support body 31 is provided on the support body 31.

[0050] Once thermal runaway occurs in the battery pack, the hot gas and particulate matter generated by the thermal runaway need to be discharged. The first side vent V1, the second side vent V2 and the through hole 311 provided in the battery pack are all conducive to the smooth discharge of the hot gas and particulate matter after the thermal runaway, reducing the residence time of the hot gas and particulate matter in the interval between the support body 31 and the battery pack 2, preventing local overheating or insulation protection failure, and reducing the further adverse effects of the hot gas and particulate matter on the battery pack 2, thereby helping to improve the safety and reliability of the battery pack.

[0051] like Figure 2 and Figure 4 As shown, in some embodiments of the battery pack B, the electrical component bracket 3 includes a plurality of legs 32 respectively connected to both ends of the support body 31 along the horizontal first direction X, each leg 32 is connected between a corresponding end of the support body 31 and a beam 13 below the corresponding end, and forms a first side vent V1 with the corresponding end and the beam 13 below the corresponding end.

[0052] By providing a support leg 32 to connect the support body 31 and the beam 13, the support leg 32 occupies a smaller space, so that the first side vent V1 can have a larger flow area, which is beneficial to the smooth discharge of hot gas and particulate matter from the first side vent V1 after thermal runaway, and reduces the residence time of hot gas and particulate matter in the interval between the support body 31 and the battery pack 2, preventing local overheating or insulation protection failure, and reducing the further adverse effects of hot gas and particulate matter on the battery pack 2, thereby helping to improve the safety and reliability of the battery pack.

[0053] like Figure 2 and Figure 4 As shown, in the battery pack B of some embodiments, along the second direction Y, the legs 32 on the two beams 13 are staggered; and / or along the second direction Y, the two ends of the support body 31 are suspended below.

[0054] The legs 32 on the two beams 13 are staggered along the second direction Y so that hot gas and particulate matter at any position along the second direction Y can be discharged from the first side vent V1 in time after thermal runaway, thereby helping to improve the safety and reliability of the battery pack.

[0055] The two ends of the support body 31 are suspended below along the second direction Y, which is beneficial for the second side vent V2 to have a larger flow area. Hot gas and particulate matter can be discharged from the second side vent V2 in time, thereby improving the safety and reliability of the battery pack.

[0056] like Figure 2 , Figure 4 and Figure 5 As shown, in the battery pack B of some embodiments, the support leg 32 is made of a strip, and the thickness direction of the strip is perpendicular to the first direction X.

[0057] like Figure 2 , Figure 4 and Figure 5 As shown, in the battery pack B of some embodiments, the leg 32 includes a first strip segment 321, two second strip segments 322 and two third strip segments 323. The first strip segment 321 extends along the second direction Y. The two second strip segments 322 extend along the second direction Y and are respectively located below the two ends of the first strip segment 321 along the second direction Y. The two third strip segments 323 extend along the third direction Z and are respectively located at the two ends of the first strip segment 321 along the second direction Y. The third strip segment 323 connects a corresponding end of the first strip segment 321 and an end of the second strip segment 322 adjacent to the corresponding end.

[0058] The support leg 32 includes a first slat segment 321, two second slat segments 322, and two third slat segments 323, so that the support leg 32 is not easily deformed along the first direction X, the second direction Y and the third direction Z, which is beneficial to reducing the displacement of the support body 31 that may occur when the battery pack is impacted, thereby helping to improve the safety and reliability of the battery pack.

[0059] The support leg 32 is made of slats, and the thickness direction of the slats is perpendicular to the first direction X, so that the support leg 32 can occupy as little ventilation area between the support body 31 and the beam 13 as possible, which is more conducive to the timely discharge of hot gas and particulate matter from between the support body 31 and the beam 13 after thermal runaway, thereby helping to improve the safety and reliability of the battery pack.

[0060] In the battery pack B of some embodiments, the support body 31 is a mounting plate for supporting electrical components.

[0061] The support body 31 is a mounting plate for supporting electrical components, which is beneficial to improving the utilization rate of the internal space of the battery pack and also beneficial to forming a first side vent V1 and a second side vent V2 with a larger flow area, thereby being more conducive to the timely discharge of hot gas and particulate matter after thermal runaway from between the support body 31 and the battery pack or beam 13, thereby helping to improve the safety and reliability of the battery pack.

[0062] In the battery pack B of some embodiments, the battery pack B includes a plurality of electrical component brackets 3 arranged side by side along a first direction X; and / or the battery pack B includes a plurality of electrical component brackets 3 arranged side by side along a second direction Y.

[0063] By providing a plurality of electrical component brackets 3, the flexibility of the internal structural layout of the battery pack and the flexibility of the electrical component layout can be increased, which is beneficial to improving the utilization rate of the internal space of the battery pack.

[0064] In the battery pack B of some embodiments, the battery cell 20 includes an explosion-proof valve 204 disposed on the top thereof, and at least one through hole 311 is disposed corresponding to at least one explosion-proof valve 204 .

[0065] At least one through hole 311 is respectively arranged corresponding to at least one explosion-proof valve 204, which facilitates at least part of the hot gas ejected from the explosion-proof valve 204 to be directly discharged from the corresponding through hole 311, and helps to reduce the residence time of the hot gas in the interval between the support body 31 and the battery pack 2, thereby facilitating improving the safety and reliability of the battery pack.

[0066] In the battery pack B of some embodiments, the through hole 311 has the same shape as the exhaust port of the corresponding explosion-proof valve 204 ; and / or the flow area of ​​the through hole 311 is larger than the flow area of ​​the exhaust port of the corresponding explosion-proof valve 204 .

[0067] The through hole 311 has the same shape as the exhaust port of the corresponding explosion-proof valve 204, and the flow area of ​​the through hole 311 is larger than the flow area of ​​the exhaust port of the corresponding explosion-proof valve 204, which is beneficial for the hot gas ejected from the explosion-proof valve 204 to be quickly discharged directly from the corresponding through hole 311, thereby helping to improve the safety and reliability of the battery pack.

[0068] like Figure 1 As shown, the electric device D according to the embodiment of the present application includes the battery pack B according to the embodiment of the present application, and the battery pack B is used to provide power to the electric device D.

[0069] The electric equipment of the embodiment of the present application has the same advantages as the battery pack of the present application.

[0070] The following combination Figures 1 to 5 The battery pack B and the electrical device D having the battery pack B in some embodiments of the present application are described in more detail.

[0071] Please refer to Figure 1 . Figure 1 The schematic diagram of the structure of the electric device vehicle D provided in some embodiments of the present application. The vehicle D can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. Figure 2 The vehicle D is provided with a battery pack B inside, and the battery pack B can be provided at the bottom, head, or tail of the vehicle D. The battery pack B can be used for powering the vehicle D, for example, it can be used as an operating power source of the vehicle D.

[0072] In some embodiments of the present application, the battery pack B can not only serve as the operating power source of the vehicle D, but also serve as the driving power source of the vehicle D, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle D.

[0073] Figure 2 The schematic diagram of the structure of the battery pack B provided in some embodiments of the present application is as follows. The battery pack B comprises a box body 1 and a battery group 2 and an electrical component support 3 contained in the box body 1 and comprising a plurality of battery cells 20 .

[0074] like Figure 2 As shown, the box body 1 includes a bottom shell 11 and a box cover (not shown) buckled on the bottom shell 11, and the box body 1 is used to provide a storage space for the battery cell 20. In the above embodiments, the box body 1 is a rectangular parallelepiped as a whole. In the embodiments not shown in the figures, the box body 1 can also be other shapes, such as a cylinder. In some embodiments, the box body can be used as part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0075] In the battery pack B, the battery pack 2 may be connected in series, in parallel or in a mixed connection. The battery pack 2 may be directly connected in series, in parallel or in a mixed connection, and then the battery pack 2 composed of the battery pack 2 may be accommodated in the box 1.

[0076] like Figure 2 As shown, a plurality of beams 13 are arranged in a first direction X at intervals in the bottom shell 11, and the plurality of beams 13 divide the internal space of the bottom shell 11 into a plurality of subspaces. Each beam 13 extends along a second direction Y. The battery pack B includes a plurality of battery packs 2. The plurality of battery packs 2 are respectively located in the plurality of subspaces. An electrical component bracket 3 is connected above a battery pack 2 and mounted on two beams 13 at both ends of the battery pack 2 along the first direction X.

[0077] Figure 3 Schematic diagram of the structure of a battery cell 20 of a battery pack B in some embodiments of the present application. Figure 3 As shown, the battery cell 20 mainly includes a battery cell (not shown), a shell 201 and an end cover assembly.

[0078] The battery cell is encapsulated in the housing space of the housing through the end cap of the end cap assembly, and the housing space is filled with electrolyte. The electrode assembly of the battery cell is the component in the battery cell 20 where the electrochemical reaction occurs.

[0079] The housing 201 is a component for providing a space for accommodating the electrode assembly, electrolyte and other components. The housing 201 can be in various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism shape, etc. The material of the housing 201 can be selected from copper, iron, aluminum, stainless steel, aluminum alloy, plastic and other materials.

[0080] The end cap assembly includes an end cap 202 and an electrode terminal 203 and an explosion-proof valve 204 disposed on the end cap 202. The end cap 202 covers the opening of the shell 201 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 202 can be adapted to the shape of the shell 201 to match the shell 201. The material of the end cap 202 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in the embodiment of the present application. The electrode terminal 203 can be used to electrically connect to the electrode assembly of the battery cell for outputting or inputting electrical energy of the battery cell 20. The explosion-proof valve 204 can be installed at the pressure relief hole (not shown) on the end cap 202 to release the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value.

[0081] like Figure 2 and Figure 4 As shown, the electrical component bracket 3 includes a supporting body 31 and a plurality of supporting legs 32 .

[0082] The support body 31 is used to support the electrical components. The support body 31 is fixedly connected to the two beams 13 via a plurality of legs 32 , and is located above the battery pack 2 and has a gap between it and the battery pack 2 .

[0083] The support body 31 is a mounting plate. The mounting plate is provided with through holes 311 connecting the upper and lower sides of the mounting plate. The battery cell 20 includes an explosion-proof valve 204 arranged on the top thereof, and a plurality of through holes 311 are arranged one-to-one corresponding to the explosion-proof valves 204 of the plurality of battery cells 20. Each through hole 311 has the same shape as the exhaust port of the corresponding explosion-proof valve 204. The flow area of ​​each through hole 311 is larger than the flow area of ​​the exhaust port of the corresponding explosion-proof valve 204.

[0084] like Figure 2 and Figure 4 As shown, the mounting plate has first side vents V1 communicating with the gaps between the two beams 13 and the two ends in the first direction X. The mounting plate has second side vents V2 communicating with the gaps between the two ends in the second direction Y and the battery pack 2, respectively.

[0085] like Figure 2 and Figure 4 As shown, a plurality of legs 32 are provided at each end of the mounting plate along the horizontal first direction X, and the plurality of legs 32 at each end are arranged at intervals along the second direction Y. Along the second direction Y, the legs 32 on the two beams 13 are arranged in a staggered manner. Along the second direction Y, the mounting plate (support body 31) is suspended below both ends. Each leg 32 is connected between a corresponding end of the mounting plate and a beam 13 below the corresponding end, and forms a first side vent V1 with the corresponding end and the beam 13 below the corresponding end.

[0086] like Figure 2 , Figure 4 and Figure 5 As shown, the support leg 32 is made of a slat, and the thickness direction of the slat is perpendicular to the first direction X. The support leg 32 includes a first slat segment 321, two second slat segments 322 and two third slat segments 323. The first slat segment 321 extends along the second direction Y. The two second slat segments 322 extend along the second direction Y and are respectively located below the two ends of the first slat segment 321 along the second direction Y. The two third slat segments 323 extend along the third direction Z and are respectively located at the two ends of the first slat segment 321 along the second direction Y. The third slat segment 323 connects a corresponding end of the first slat segment 321 and an end of the second slat segment 322 adjacent to the corresponding end. The first slat segment 321, the two second slat segments 322 and the two third slat segments 323 of the support leg 32 form a "+" structure. The support leg 32 of the "+" structure makes it difficult for the support body 31 to be displaced along the first direction X, the second direction Y and the third direction Z.

[0087] The support leg 32 is detachably connected to the mounting plate (support body 31) and the beam 13. For example, the support leg 32 and the mounting plate (support body 31) or the support leg 32 and the beam 13 can be connected by screws.

[0088] According to the above description, the battery pack B of this embodiment has at least one of the following advantages:

[0089] Two sets of supporting feet 32 ​​are provided at both ends of the supporting body 31 along the first direction X and fixedly connected to the two beams 13, so that the installation of the supporting body 31 in the battery pack B can be more stable, the stability of the electrical components fixed on the electrical component bracket 3 can be improved, and the space utilization and safety reliability inside the battery pack B can be improved.

[0090] A first side vent V1 is provided below both ends of the support body 31 along the first direction X, a second side vent V2 is provided below both ends along the second direction Y, and a through hole 311 is provided on the support body 31, so that hot gas and particulate matter can be discharged from the first side vent V1, the second side vent V2 and the through hole 311 after thermal runaway, which is conducive to solving the problem of blockage of the exhaust channel due to the installation of the electrical component bracket, thereby further improving the safety and reliability of the battery pack.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solution requested for protection in this application.

Claims

1. A battery pack (B), characterized in that: include: A box body (1), the box body (1) comprising a bottom shell (11) and at least two beams (13) connected to the bottom shell (11), the at least two beams (13) being arranged side by side along a first horizontal direction (X) and extending along a second horizontal direction (Y) perpendicular to the first direction (X); A battery pack (2) comprising a plurality of battery cells (20) arranged side by side, wherein the battery pack (2) is located between two of the at least two beams (13); and An electrical component support (3) comprises a support body (31) for supporting the electrical component, the support body (31) being fixedly disposed above the battery pack (2) and having a gap between the support body and the battery pack (2), and the electrical component support (3) being connected to the two beams (13).

2. The battery pack (B) according to claim 1, characterized in that: The two ends of the support body (31) along the first direction (X) and between the two beams (13) are respectively provided with first side vents (V1) communicating with the gap; and / or The support body (31) has second side vents (V2) communicating with the gap between the two ends along the second horizontal direction (Y) and the battery pack (2); and / or The support body (31) is provided with a through hole (311) communicating with the upper and lower sides of the support body (31).

3. The battery pack (B) according to claim 2, characterized in that: The electrical component bracket (3) comprises a plurality of legs (32) respectively connected to both ends of the support body (31) along a first horizontal direction (X), each of the legs (32) being connected between a corresponding end of the support body (31) and the beam (13) below the corresponding end, and forming the first side vent (V1) with the corresponding end and the beam (13) below the corresponding end.

4. The battery pack (B) according to claim 3, characterized in that: Along the second direction (Y), the legs (32) on the two beams (13) are arranged in a staggered manner; and / or Along the second direction (Y), both ends of the support body (31) are suspended below.

5. The battery pack (B) according to claim 3, characterized in that: The support foot (32) is made of a strip, and the thickness direction of the strip is perpendicular to the first direction (X).

6. The battery pack (B) according to claim 5, characterized in that: The support foot (32) comprises: A first strip segment (321) extending along the second direction (Y); Two second strip segments (322), extending along the second direction (Y), and respectively located below two ends of the first strip segment (321) along the second direction (Y); and Two third slat segments (323) extend along a third direction (Z) perpendicular to the first direction (X) and the second direction (Y), and are respectively located at two ends of the first slat segment (321) along the second direction (Y), and the third slat segments (323) connect a corresponding end of the first slat segment (321) and an end of the second slat segment (322) adjacent to the corresponding end.

7. The battery pack (B) according to claim 2, characterized in that: The supporting body (31) is a mounting plate used to carry electrical components.

8. The battery pack (B) according to any one of claims 1 to 7, characterized in that: The battery pack (B) comprises a plurality of the electrical component brackets (3) arranged side by side along the first direction (X); and / or The battery pack (B) comprises a plurality of electrical component brackets (3) arranged side by side along the second direction (Y).

9. The battery pack (B) according to any one of claims 2 to 7, characterized in that: The battery cell (20) comprises an explosion-proof valve (204) arranged on the top thereof, and at least one through hole (311) and at least one explosion-proof valve (204) are respectively arranged correspondingly.

10. The battery pack (B) according to claim 9, characterized in that: The through hole (311) has the same shape as the exhaust port of the corresponding explosion-proof valve (204); and / or The flow area of ​​the through hole (311) is greater than the flow area of ​​the corresponding exhaust port of the explosion-proof valve (204).

11. An electrical device (D), comprising a battery pack (B), characterized in that: The battery pack (B) is a battery pack (B) according to any one of claims 1 to 10, and the battery pack (B) is used to provide power to the power-consuming device (D).

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