Box body, battery and electric device

Abstract

The embodiment of the invention provides a box body, a battery and an electric device. The box body comprises a plurality of beam bodies which are enclosed to form a first accommodating space, and the first accommodating space is used for accommodating a battery high-voltage module; the heat management component is intersected with the beam body and is used for adjusting the temperature of the battery high-voltage module; wherein in the thickness direction of the heat management part, the heat management part is located in the first containing space, according to the box body, the battery and the power utilization device, the heat management part is arranged to adjust the temperature of the battery high-voltage module, in the battery using process, the battery high-voltage module can be cooled in time, and the battery using efficiency is improved. Therefore, the service life of the battery high-voltage module is prolonged.

Description

Technical Field

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

[0002] Usually, the battery box is used not only to accommodate battery cells, but also to accommodate the battery high-voltage module. During the use of the battery, the temperature rise of the battery high-voltage module also increases. If the battery high-voltage module cannot be cooled down in time, it will affect the service life of the battery high-voltage module and cause battery failure. Summary of the invention

[0003] In view of this, an embodiment of the present application provides a box, a battery and an electrical device. By setting a thermal management component to adjust the temperature of the battery high-voltage module, the battery high-voltage module can be cooled in time during the use of the battery, thereby improving the service life of the battery high-voltage module.

[0004] In a first aspect, a box body is provided, comprising: a plurality of beam bodies, enclosing a first accommodating space, the first accommodating space being used to accommodate a battery high-voltage module; a thermal management component, intersecting with the beam bodies, and being used to adjust the temperature of the battery high-voltage module; wherein, in the thickness direction of the thermal management component, the thermal management component is located in the first accommodating space.

[0005] In this embodiment, on the one hand, by setting a thermal management component to adjust the temperature of the battery high-voltage module, the temperature of the battery high-voltage module can be timely reduced during the use of the battery, thereby increasing the service life of the battery high-voltage module; on the other hand, in the thickness direction of the thermal management component, the thermal management component is set in the first accommodating space, which can save the size of the box in the thickness direction of the thermal management component.

[0006] In a possible implementation, the beam body includes a main body portion and an extension portion that are connected, the extension portion extends from the main body portion toward the first accommodating space, and the thermal management component is fixedly connected to the extension portion.

[0007] In this embodiment, by fixedly connecting the thermal management component and the extension portion, the bonding strength between the two can be enhanced; on the other hand, the extension portion and the beam body are integrally arranged and extend from the main body toward the first accommodating space, thereby increasing the width of the beam body, which can increase the vibration frequency of the battery when it is impacted, thereby promoting the uniform distribution of the electrolyte inside the battery and improving the charging and discharging performance of the battery.

[0008] In a possible implementation, a surface of the extension portion facing the battery high-voltage module is flush with a surface of the thermal management component facing the battery high-voltage module.

[0009] In this embodiment, by setting the surface of the extension portion facing the first accommodation space to be flush with the surface of the thermal management component facing the first accommodation space, it is beneficial to place the battery high voltage module and maximize the use of the first accommodation space.

[0010] In a possible implementation, the thermal management component is fixedly connected to the beam body by welding.

[0011] In this embodiment, the thermal management component is fixedly connected to the beam body by welding, which can improve the structural strength of the box body without destroying the integrity of the box body. In addition, since the thermal management component is arranged in the through hole formed by the beam body and the thermal management component and the beam body can be directly welded, there is no need to add additional sealing measures, which greatly reduces the complexity of preparing the box body.

[0012] In a possible implementation, the heat management component includes a first heat exchange plate, and a flow channel of the first heat exchange plate is curved.

[0013] In this embodiment, the flow channel of the first heat exchange plate is designed to be curved, which is beneficial to increase the flow length of the fluid in a limited space, thereby improving the heat dissipation efficiency. In addition, the flow channel of the first heat exchange plate is designed to be curved, which can also be understood as preparing the first heat exchange plate by a stamping process, which is beneficial to reducing the weight of the box, thereby improving the energy density of the battery.

[0014] In a possible implementation, the box body further includes: a first protective plate, which is arranged to intersect with the beam body and is arranged on a side of the first heat exchange plate away from the first accommodating space.

[0015] In this embodiment, a first protective plate is disposed on a side of the first heat exchange plate away from the first accommodating space, which can protect the first heat exchange plate on the one hand and improve the overall strength of the box body on the other hand.

[0016] In a possible implementation, in a thickness direction of the heat management component, the first protection plate is located in the first accommodation space.

[0017] In this embodiment, in the thickness direction of the heat management component, the first protection plate is arranged in the first accommodating space, which can save the size of the box in the thickness direction of the heat management component.

[0018] In a possible implementation manner, a buffer is provided between the first heat exchange plate and the first protective plate.

[0019] In this embodiment, by providing a buffer between the first heat exchange plate and the first protective plate, the impact of the bottom ball hitting the inside of the battery can be reduced.

[0020] In a possible implementation, the heat management component includes a second heat exchange plate, and a flow channel of the second heat exchange plate is linear.

[0021] In this embodiment, the flow channel of the second heat exchange plate is designed to be linear, which can also be understood as the second heat exchange plate is prepared by a profile extrusion process, which is conducive to the rapid flow of fluid inside the profile, thereby improving the heat dissipation efficiency. In addition, the second heat exchange plate prepared by the profile extrusion process can directly support the battery high-voltage module without the need to set a support plate under the thermal management component, which is conducive to reducing costs.

[0022] In a possible implementation, the second heat exchange plate has openings at both ends along a first direction, the first direction being an extension direction of the flow channel, and the box body further includes: a sealing strip disposed at the opening for sealing the opening.

[0023] In this embodiment, sealing strips are arranged at the openings at both ends of the second heat exchange plate along the first direction to block the openings, so that the flow channel forms a closed loop in the second heat exchange plate, reducing the possibility of leakage.

[0024] In a possible implementation, the sealing strip is a metal strip, and the metal strip is fixedly connected to the second heat exchange plate by welding.

[0025] In this embodiment, the metal strip is fixedly connected to the second heat exchange plate by welding to seal the opening of the second heat exchange plate, which can further reduce the possibility of leakage.

[0026] In a possible implementation, the metal strip passes through the second heat exchange plate along a second direction, where the second direction is a length direction of the metal strip.

[0027] In this embodiment, the metal strip penetrates the second heat exchange plate along the second direction, which facilitates the welding operation between the metal strip and the second heat exchange plate.

[0028] In a possible implementation, in a direction perpendicular to the thickness direction of the heat management component, the first accommodation space is located at an end of the box body.

[0029] In this embodiment, the first accommodation space is arranged at the end of the box body, so that the battery cells can be centrally arranged and the remaining space in the box body after the battery cells are arranged can be fully utilized, thereby improving the space utilization rate of the box body.

[0030] In a possible implementation, multiple beams also enclose a second accommodating space, the second accommodating space is adjacent to the first accommodating space, and the second accommodating space is used to accommodate battery cells. The box body also includes: a second protective plate for supporting the battery cells, and the second protective plate extends to the side of the thermal management component away from the battery high-voltage module.

[0031] In this embodiment, the second protection plate for supporting the battery cell is extended to the side of the thermal management component away from the battery high voltage module, which can improve the supporting strength of the box.

[0032] In a second aspect, a battery is provided, comprising a battery high-voltage module and a box body in the first aspect and any possible implementation thereof, wherein the battery high-voltage module is disposed in a first accommodating space of the box body.

[0033] In a possible implementation, in a direction perpendicular to the thickness direction of the heat management component, the first accommodation space is located at an end of the box body.

[0034] In a possible implementation, the battery further includes a battery cell, and the battery cell is disposed in a second accommodation space of the box body, and the second accommodation space is adjacent to the first accommodation space.

[0035] In a third aspect, an electrical device is provided, comprising the battery in the second aspect and any possible implementation thereof, wherein the battery is used to provide electrical energy to the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0037] Figure 1 is a structural schematic diagram of a vehicle disclosed in an embodiment of the present application;

[0038] Figure 2 is a schematic diagram of the structure of a battery disclosed in one embodiment of the present application;

[0039] Figure 3 It is a schematic diagram of the internal structure of a box disclosed in an embodiment of the present application;

[0040] Figure 4 is a partial cross-sectional view of a box body disclosed in an embodiment of the present application;

[0041] Figure 5 is a partial cross-sectional view of a box body disclosed in another embodiment of the present application;

[0042] Figure 6 is a schematic structural diagram of a heat exchange plate disclosed in one embodiment of the present application;

[0043] Figure 7 is a schematic structural diagram of a heat exchange plate disclosed in another embodiment of the present application;

[0044] Figure 8 It is a partial cross-sectional view of a box body disclosed in yet another embodiment of the present application. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0047] 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.

[0048] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0049] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0050] The term "multiple" as used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0051] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0052] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0053] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0054] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0055] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0056] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc., treated with silver surface, may be used. The composite current collector may include a polymer material base and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0057] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Among them, examples of lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon.

[0058] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0059] As an example, the negative electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base and a metal layer. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0060] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0061] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.

[0062] As an example, the negative electrode active material may adopt the negative electrode active material for battery cells known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc.

[0063] In some embodiments, the negative electrode may be a foam metal. The foam metal may be foam nickel, foam copper, foam aluminum, foam alloy, or foam carbon, etc. When the foam metal is used as the negative electrode plate, the surface of the foam metal may not be provided with a negative electrode active material, but of course, a negative electrode active material may also be provided.

[0064] As an example, a lithium source material, potassium metal or sodium metal may be filled or / and deposited in the negative electrode current collector, and the lithium source material is lithium metal and / or lithium-rich material.

[0065] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0066] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0067] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.

[0068] As an example, the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics.

[0069] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0070] In some embodiments, the battery cell further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0071] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0072] In some embodiments, the electrode assembly is a laminate structure.

[0073] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets may be alternately stacked.

[0074] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet is folded to form a plurality of stacked folded segments, with a positive electrode sheet sandwiched between adjacent folded segments.

[0075] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of stacked folded sections.

[0076] As an example, a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.

[0077] As an example, the separator may be disposed continuously, and may be disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0078] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0079] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0080] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film. The housing includes a shell and a cover plate.

[0081] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in this application.

[0082] The battery mentioned in the embodiments of the present application may include one or more battery cells to provide a single physical module with higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar component.

[0083] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0084] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0085] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the bottom plate of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0086] The technical solutions described in the embodiments of the present application are applicable to various devices that use batteries, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, electric vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0087] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applied to all devices using batteries. However, for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0088] Usually, the battery box is used not only to accommodate battery cells, but also to accommodate the battery high-voltage module. During the use of the battery, the temperature rise of the battery high-voltage module also increases. If the battery high-voltage module cannot be cooled down in time, it will affect the service life of the battery high-voltage module and cause battery failure.

[0089] In view of this, an embodiment of the present application provides a box body, which includes multiple beams and a thermal management component. The multiple beams enclose a first accommodating space for accommodating a battery high-voltage module. The thermal management component is used to adjust the temperature of the battery high-voltage module and is fixedly connected to the beams. In the thickness direction of the thermal management component, the thermal management component is located in the first accommodating space. On the one hand, by arranging the thermal management component to adjust the temperature of the battery high-voltage module, the temperature of the battery high-voltage module can be reduced in time during the use of the battery, thereby improving the service life of the battery high-voltage module; on the other hand, by designing that the thermal management component is located in the first accommodating space in the thickness direction of the thermal management component, the size of the box in the thickness direction of the thermal management component can be saved.

[0090] For example, Figure 1 As shown, it is a structural schematic diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 80, a controller 60 and a battery 100 may be arranged inside the vehicle 1. The controller 60 is used to control the battery 100 to supply power to the motor 80. For example, a battery 100 may be arranged at the bottom, front or rear of the vehicle 1. The battery 100 may be used to supply power to the vehicle 1. For example, the battery 100 may be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 1. In another embodiment of the present application, the battery 100 may not only be used as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0091] In order to meet different power usage requirements, the battery may include multiple different types of battery cells, for example, battery cells with different safety characteristics. The multiple battery cells may be connected in series, in parallel or in a mixed manner according to the type of the battery cells to form multiple battery cell groups, and the multiple battery cell groups are then connected in series to form a battery, wherein the mixed connection may be a mixture of series and parallel connections. The multiple different battery cells may also be directly connected in series, in parallel or in a mixed manner to form a battery. In other words, multiple battery cells may be directly formed into a battery, or may be first formed into a battery cell group according to the type of the battery cells, and then the battery cell group may be formed into a battery.

[0092] Figure 2 The schematic diagram of the structure of a battery 100 according to an embodiment of the present application is shown. The battery 100 may include a plurality of battery cells (not shown in the figure). The battery 100 may also include a box body 300 (or a cover body). The box body 300 has a hollow structure inside, and a plurality of battery cells are accommodated in the box body 300. Figure 2As shown, the box body 300 may include two parts, which are respectively referred to as a box body 305 and a box cover 306. The box body 305 and the box cover 306 are buckled together. The shapes of the box body 305 and the box cover 306 may be determined according to the shapes of the combination of multiple battery cells.

[0093] In some embodiments, the box body 305 and the box cover 306 may each have an opening. For example, the box body 305 and the box cover 306 may both be hollow cuboids and each have only one open face, the openings of the box body 305 and the box cover 306 are arranged opposite to each other, and the box body 305 and the box cover 306 are buckled together to form a box with a closed chamber. A plurality of battery cells are connected in parallel, in series, or in a mixed combination and placed in the box formed by the box body 305 and the box cover 306 being buckled together.

[0094] Figure 3 FIG. 1 is a schematic diagram showing the internal structure of a box 300 according to an embodiment of the present application. Figure 2 .

[0095] like Figure 3 As shown, the box body 300 is an internal hollow structure, which may include a plurality of beam bodies 310, and the plurality of beam bodies 310 may include side beams and internal beam bodies, the side beams refer to the outermost frames of the box body, and the internal beam bodies are arranged inside the hollow structure of the box body 300, for example, the internal beam bodies may be expansion beams. That is, the box body 300 may be surrounded by side beams to form a large accommodation space, and then the large accommodation space is divided into a plurality of subspaces by arranging the internal beam bodies in the box body 300.

[0096] In addition to accommodating battery cells, the box body 300 is usually used to accommodate a battery high-voltage module. That is, the internal accommodation space of the box body 300 can be divided into at least two subspaces, one subspace is used to accommodate battery cells, and the other subspace is used to accommodate a battery high-voltage module. The subspace for accommodating the battery high-voltage module is the first accommodation space 301 in the embodiment of the present application. The first accommodation space 301 can be formed by enclosing a plurality of beams 310. For example, the first accommodation space 301 is formed by enclosing a side beam and an internal beam.

[0097] The battery high-voltage module is a high-voltage power distribution device that may include a high-voltage relay, a high-voltage fuse, and related chips, and may communicate signals with related modules to ensure the safety of high-voltage power consumption of electrical devices. Optionally, in addition to accommodating the battery high-voltage module, the first accommodation space 301 of the embodiment of the present application may also accommodate a battery control module for managing and monitoring the battery. For example, the battery control module may include a battery management unit (BMU), which may control the closing and opening of a relay to control the charging or discharging of the battery.

[0098] The box 300 may also include a heat management component 320, which may be arranged to intersect with the beam 310 and is used to adjust the temperature of the battery high voltage module. Figure 2 The box body and the box cover are shown, and the box body is provided with an opening, and the box cover covers the opening to enclose the battery high voltage module and / or the battery cell in the hollow structure of the box body 300, and the thermal management component 320 can be arranged opposite to the opening of the box body. Figure 3 When placed as shown, the thermal management component 320 can also be understood as being arranged at the bottom of the battery high-voltage module. It should be understood that the thermal management component 320 in the embodiment of the present application may generally include a heat exchange plate or a spray structure, which can contain liquid or gas to heat or cool the battery high-voltage module. In the case of cooling or lowering the temperature of the battery high-voltage module, the thermal management component 320 can be used to contain a cooling fluid to lower the temperature of the battery high-voltage module. At this time, the thermal management component 320 can also be referred to as a cooling component, a cooling system or a cooling plate, etc., and the fluid contained therein can also be referred to as a cooling medium or a cooling fluid, more specifically, a coolant or a cooling gas. Optionally, the above-mentioned fluid can be circulating to achieve a better temperature regulation effect. Optionally, the fluid can be water, a mixture of water and ethylene glycol, or air, etc.

[0099] Optionally, the thermal management component 320 can be fixedly connected to the beam body 310 in various ways. For example, the thermal management component 320 and the beam body 310 are fixedly connected by welding, gluing, or mechanical connection. In other embodiments, the thermal management component 320 and the beam body 310 can also be spliced ​​together only by structural design and not fixed by other means. For example, one of the thermal management component 320 and the beam body 310 has a protrusion and the other has a concave portion, and the protrusion and the concave portion cooperate with each other.

[0100] It should be noted that the thermal management component 320 and the beam body 310 are arranged to intersect each other. It can be understood that the main structure of the thermal management component 320 and the main structure of the beam body 310 can be arranged at an angle, for example, the main structure of the thermal management component 320 is perpendicular to the main structure of the beam body 310.

[0101] Figure 4 Shows Figure 3 A partial cross-sectional view of a box body 300 along line AA' is shown. Figure 5 Shows Figure 3 A partial cross-sectional view of another box body 300 is shown along line BB'.

[0102] like Figure 4 and Figure 5As shown, in the thickness direction Z of the heat management component 320, the heat management component 320 is located in the first accommodation space 301. In other words, the heat management component 320 is located between the side walls of the plurality of beam bodies 310 that enclose the first accommodation space 301, and in the thickness direction Z of the heat management component 320, the heat management component 320 does not exceed the beam bodies 310.

[0103] In this embodiment, on the one hand, by setting a thermal management component 320 to adjust the temperature of the battery high-voltage module, the temperature of the battery high-voltage module can be timely reduced during the use of the battery, thereby improving the service life of the battery high-voltage module; on the other hand, in the thickness direction Z of the thermal management component 320, the thermal management component 320 is located in the first accommodating space 301, which can save the size of the box body 300 in the thickness direction Z of the thermal management component 320.

[0104] like Figure 4 and Figure 5 As shown, the beam body 310 includes a main body portion 311 and an extension portion 312 connected to each other. The extension portion 312 extends from the main body portion 311 toward the first accommodating space 301 , and the heat management component 320 is fixedly connected to the extension portion 312 .

[0105] It should be understood that the main body 311 can limit the battery high voltage module to move in the horizontal direction, and the thermal management component 320 and the extension 312 of the beam body 310 can jointly limit the battery high voltage module to move in the thickness direction Z. Optionally, the main body 311 can be arranged perpendicular to the extension 312, the thermal management component 320 can be arranged perpendicular to the main body 311, and the thermal management component 320 can be arranged parallel to the extension 312.

[0106] In some embodiments, the extension portion 312 may extend from the bottom of the main body 311 toward the first accommodation space 301. In this case, the fixed connection between the extension portion 312 and the thermal management component 320 enables the first accommodation space 301 to form a complete accommodation space in the thickness direction Z. In other embodiments, the extension portion 312 may also extend from a position in the middle area of ​​the main body 311 in the thickness direction Z toward the first accommodation space 301. In this case, the fixed connection between the extension portion 312 and the thermal management component 320 enables the first accommodation space 301 to be divided into a plurality of sub-accommodation spaces in the thickness direction Z.

[0107] In this embodiment, by fixedly connecting the thermal management component 320 and the extension portion 312, the bonding strength between the two can be enhanced; on the other hand, the extension portion 312 is integrally arranged with the main body 311 and extends from the main body 311 toward the first accommodating space 301, thereby increasing the width of the beam body 310, which can increase the vibration frequency of the battery when it is impacted, thereby promoting the uniform distribution of the electrolyte inside the battery and improving the charging and discharging performance of the battery.

[0108] Continue to see Figure 4 and Figure 5 , a surface 3121 of the extension portion 312 facing the battery high voltage module is flush with a surface 3201 of the thermal management component 320 facing the battery high voltage module.

[0109] In other embodiments, the surface 3121 of the extension portion 312 facing the first accommodation space 301 and the surface 3201 of the heat management component 320 facing the first accommodation space 301 may not be flush. That is, the surface 3121 of the extension portion 312 facing the first accommodation space 301 and the surface 3201 of the heat management component 320 facing the first accommodation space 301 are in a stepped structure.

[0110] In this embodiment, by setting the surface 3121 of the extension portion 312 facing the first accommodating space 301 flush with the surface 3201 of the thermal management component 320 facing the first accommodating space 301, it is beneficial to place the battery high voltage module and maximize the utilization of the first accommodating space 301.

[0111] Optionally, in the embodiment of the present application, the thermal management component 320 is fixedly connected to the beam body 310 by welding.

[0112] In this embodiment, the thermal management component 320 and the beam body 310 are fixedly connected by welding, which can improve the structural strength of the box body 300 without destroying the integrity of the box body 300. In addition, since the thermal management component 320 is arranged in the through hole formed by the beam body 310, and the thermal management component 320 and the beam body 310 can be directly welded, there is no need to add additional sealing measures, which greatly reduces the preparation complexity of the box body 300.

[0113] Further optionally, the thermal management component 320 and the beam body 310 are fixedly connected by means of friction stir welding.

[0114] The so-called friction stir welding refers to the use of the heat generated by the friction between the high-speed rotating welding tool and the workpiece to partially melt the welded material. When the welding tool moves forward along the welding interface, the plasticized material flows from the front of the welding tool to the back under the action of the rotating friction of the welding tool, and forms a dense solid phase weld under the extrusion of the welding tool. The advantages of friction stir welding are low welding cost and simple operation.

[0115] In one embodiment, if Figure 4 As shown, the heat management component 320 includes a first heat exchange plate 321 , and the flow channel 3213 of the first heat exchange plate 321 is curved.

[0116] That is to say, the first heat exchange plate 321 is prepared by a stamping process, and the extended shape of the flow channel 3213 of the first heat exchange plate 321 can be, for example, a serpentine shape, a sine wave shape, a sawtooth wave shape, a sharp pulse shape, etc. The extended shape of the flow channel 3213 of the first heat exchange plate 321 can also be as follows Figure 6 The irregular bending shape shown. Figure 6 As shown, the first heat exchange plate 321 may include an upper plate 3211 and a lower plate 3212, a flow channel 3213 is stamped on the lower plate 3212, a male connector is provided on the upper plate 3211, and the upper plate 3211 and the lower plate 3212 are brazed to form the first heat exchange plate 321 with the flow channel 3213.

[0117] In this embodiment, the flow channel 3213 of the first heat exchange plate 321 is designed to be curved, which is beneficial to increase the flow length of the fluid in a limited space, thereby improving the heat dissipation efficiency. In addition, the flow channel of the first heat exchange plate 321 is designed to be curved, which can also be understood as using a stamping process to prepare the first heat exchange plate 321, which is beneficial to reduce the weight of the box body 300, thereby being able to improve the energy density of the battery.

[0118] Further references Figure 4 The box body 300 further includes: a first protection plate 330 , which is arranged to intersect with the beam body 310 and is arranged on a side of the first heat exchange plate 321 away from the first accommodating space 301 .

[0119] It should be noted that the first protective plate 330 is arranged to intersect with the beam body 310 . It can be understood that the main structure of the first protective plate 330 and the main structure of the beam body 310 can be arranged at an angle. For example, the main structure of the first protective plate 330 is perpendicular to the main structure of the beam body 310 .

[0120] Further optionally, the first protective plate 330 is disposed perpendicularly to the main body 311 , and the first protective plate 330 is disposed parallel to the extension portion 312 .

[0121] Since the first heat exchange plate 321 formed by stamping is usually not strong enough, a first protective plate 330 is provided at the bottom of the first heat exchange plate 321 , which can protect the first heat exchange plate 321 on the one hand and improve the overall strength of the box body 300 on the other hand.

[0122] Optionally, the first protective plate 330 may be made of the same material as the box body 300. Specifically, the first protective plate 330 may be made of the same material as the beam body 310. For example, when the beam body 310 is made of aluminum, the first protective plate 330 may be an aluminum plate.

[0123] Alternatively, if Figure 4As shown, in the thickness direction Z of the heat management component 320 , the first protection plate 330 is located in the first accommodation space 301 .

[0124] In other words, the first protection plate 330 is located between the side walls of the plurality of beam bodies 310 enclosing and forming the first accommodation space 301 , and in the thickness direction Z of the heat management component 320 , the first protection plate 330 does not extend beyond the beam bodies 310 .

[0125] Optionally, the first protective plate 330 may be fixedly connected to the beam body 310, and further, the first protective plate 330 and the beam body 310 are fixedly connected by welding. For example, the first protective plate 330 and the beam body 310 are fixedly connected by friction stir welding.

[0126] In some embodiments, the first protective plate 330 may be fixedly connected to the extension portion 312 of the beam body 310. For example, the first protective plate 330 is fixedly connected to the extension portion 312 of the beam body 310 by welding, so that the surface of the first protective plate 330 away from the battery high voltage module is flush with the surface of the extension portion away from the battery high voltage module, and the thermal management component 320 is also fixedly connected to the extension portion 312 of the beam body 310 by welding, so that the surface 3201 of the thermal management component 320 facing the battery high voltage module is flush with the surface 3121 of the extension portion 312 facing the battery high voltage module.

[0127] In other embodiments, the first protective plate 330 and the beam body 310 may be spliced ​​together only through structural design and not fixed by other means. For example, one of the first protective plate 330 and the beam body 310 has a protrusion and the other has a recess, and the protrusion and the recess cooperate with each other.

[0128] In this embodiment, in the thickness direction Z of the thermal management component 320, the first protective plate 330 is located in the first accommodating space 301, which can save the size of the box body 300 in the thickness direction Z of the thermal management component 320. In addition, the first protective plate 330 is fixedly connected to the beam body 310, which is beneficial to enhance the structural strength of the box body 300 without destroying the integrity of the box body 300.

[0129] In other embodiments, the first protection plate 330 may be fixedly connected to the heat management component 320, but not fixedly connected to the beam body 310. For example, the first protection plate 330 and the heat management component 320 are clamped.

[0130] See also Figure 4 A buffer member 340 is disposed between the first heat exchange plate 321 and the first protective plate 330. In some embodiments, the buffer member 340 may be a buffer foam.

[0131] In this embodiment, by providing a buffer member 340 between the first heat exchange plate 321 and the first protective plate 330 , the influence of the bottom ball hitting on the inside of the battery can be reduced.

[0132] In another embodiment, if Figure 5 As shown, the heat management component 320 includes a second heat exchange plate 322 , and the flow channel 3221 of the second heat exchange plate 322 is linear.

[0133] In other words, the second heat exchange plate 322 is prepared by a profile extrusion process. The extruded profile heat exchange plate is usually a harmonica tube structure, and the flow channel inside it is linear, not like the flow channel of the stamped heat exchange plate that is randomly bent. And the two ends of the heat exchange plate are collectors, which can play a converging role. In this embodiment, the flow channel 3221 of the second heat exchange plate 322 is designed to be linear, which can also be understood as the use of a profile extrusion process to prepare the second heat exchange plate 322, which is conducive to the rapid flow of fluid inside the profile, thereby improving the heat dissipation efficiency. In addition, the second heat exchange plate 322 prepared by the profile extrusion process can directly support the battery high-voltage module without the need to set a support plate under the thermal management component 320, which is conducive to reducing costs.

[0134] Alternatively, if Figure 7 As shown, the second heat exchange plate 322 has openings 3222 at both ends along the first direction X. The first direction X is the extension direction of the flow channel 3221 . The box body 300 further includes: a sealing strip 350 disposed at the opening 3222 for sealing the opening 3222 .

[0135] Since the two ends of the second heat exchange plate 322 prepared by the profile extrusion process are usually non-closed, in this embodiment, openings 3222 are set at both ends of the second heat exchange plate 322 along the first direction X, and a sealing strip 350 is set at the opening 3222 to seal the opening 3222, so that the flow channel 3221 forms a closed loop in the second heat exchange plate 322, thereby reducing the possibility of leakage.

[0136] Optionally, a sealing strip 350 may be provided at each end of the second heat exchange plate 322 along the first direction X, so that the sealing structure for sealing the plurality of flow channels 3221 forms a whole, so as to reduce the splicing gap between the sealing strips 350 .

[0137] Optionally, in the embodiment of the present application, the sealing strip 350 is a metal strip, and the metal strip is fixedly connected to the second heat exchange plate 322 by welding.

[0138] In this embodiment, the metal strip is fixedly connected to the second heat exchange plate 322 by welding to seal the opening 3222 of the second heat exchange plate 322, which can further reduce the possibility of leakage.

[0139] In other embodiments, the sealing strip 350 may also be made of non-metallic materials, and may further be fixedly connected to the second heat exchange plate 322 by gluing or other methods.

[0140] Continue to see Figure 7 The metal strip passes through the second heat exchange plate 322 along the second direction Y, so that the metal strip is welded to the second heat exchange plate 322 at the opening of the second heat exchange plate 322 along the second direction Y, and the second direction Y is the length direction of the metal strip. For example, at the opening of the second heat exchange plate 322 along the second direction Y, the second heat exchange plate 322 and the metal strip are fixedly connected by argon arc welding.

[0141] In this embodiment, after the metal strip is integrated with the second heat exchange plate 322, it is arranged between the side walls of the beam body 310 and fixedly connected to the beam body 310. Therefore, the integrated second heat exchange plate 322 and the metal strip form a plane facing the side wall of the beam body 310. In this case, it is not convenient to weld and fix the second heat exchange plate 322 and the metal strip at the opening 3222 along the first direction X. The metal strip penetrates the second heat exchange plate 322 along the second direction Y, which facilitates the welding operation of the metal strip and the second heat exchange plate 322.

[0142] See also Figure 7 The flow channel 3221 may be disposed only in the middle region of the second heat exchange plate 322 along the width direction, and the sealing strip 350 may also only span the middle region. To facilitate welding operations, a notch may be disposed in the edge region of the second heat exchange plate 322 along the width direction.

[0143] After the sealing strip 350 is integrated with the second heat exchange plate 322 , the second heat exchange plate 322 may be further welded to the beam body 310 .

[0144] In some embodiments, the first accommodation space 301 may be located at an end of the box body 300 in a direction perpendicular to the thickness direction Z of the heat management component 320 .

[0145] For example, Figure 3 As shown, the first accommodating space 301 may be located at the end of the length direction of the box body 300. For another example, the first accommodating space 301 may also be located at the end of the width direction of the box body 300. In other embodiments, the first accommodating space 301 may also be located at one or both ends of the length direction of the box body 300, and / or, the first accommodating space 301 may also be located at one or both ends of the width direction of the box body 300.

[0146] In this embodiment, the first accommodation space 301 is disposed at the end of the box body 300 , so that the battery cells can be centrally arranged while fully utilizing the remaining space in the box body 300 after the battery cells are arranged, thereby improving the space utilization of the box body 300 .

[0147] In some other embodiments, the first accommodation space 301 may also be located in the middle space of the box body 300 . For example, the first accommodation space 301 divides the space of the box body 300 for accommodating battery cells into two spaces.

[0148] Alternatively, if Figure 3 and Figure 8 As shown, multiple beams 310 also enclose a second accommodating space 302, which is adjacent to the first accommodating space 301. The second accommodating space 302 is used to accommodate battery cells. The box body 300 also includes: a second protective plate 360 ​​for supporting the battery cells. The second protective plate 360 ​​extends to the side of the thermal management component 320 away from the battery high-voltage module.

[0149] Optionally, the second protective plate 360 ​​may be disposed at the bottom of the battery cell, and the second protective plate 360 ​​may be fixedly connected to the beam body 310 , for example, the second protective plate 360 ​​is fixedly connected to the beam body by means of bolts.

[0150] In this embodiment, the second protection plate 360 ​​for supporting the battery cells is extended to a side of the heat management component 320 away from the battery high voltage module, which can improve the supporting strength of the box body 300 .

[0151] In other embodiments, the box 300 may also include a thermal management component for thermal management of the battery cell, which may be disposed at the bottom, top, and side of the battery cell. The embodiment of the present application does not limit the location and structure of the thermal management component of the battery cell.

[0152] See again Figures 3 to 8The embodiment of the present application provides a box body 300, including a plurality of beam bodies 310, which enclose a first accommodating space 301 and a second accommodating space 302, wherein the first accommodating space 301 is located at the end of the box body 300, and is used to accommodate a battery high-voltage module, and the second accommodating space 302 is adjacent to the first accommodating space, and is used to accommodate a battery cell, and the beam body 310 includes a main body portion 311 and an extension portion 312 connected to each other, and the extension portion 312 extends from the main body portion 311 toward the first accommodating space 301; the box body 300 also includes a thermal management component 320, which is arranged at the bottom of the battery high-voltage module, and a surface 3121 of the extension portion 312 facing the battery high-voltage module is flush with a surface 3201 of the thermal management component 320 facing the battery high-voltage module, and the thermal management component 320 and the extension portion 312 are fixedly connected by stir friction welding. The thermal management component 320 includes a first heat exchange plate 321, the flow channel 3213 of the first heat exchange plate 321 is curved, and the box body 300 also includes a first protective plate 330 and a buffer 340, the first protective plate 330 is arranged at the bottom of the thermal management component 320, and the buffer 340 is arranged between the first protective plate 330 and the thermal management component 320, the surface of the first protective plate 330 away from the battery high-voltage module is flush with the surface of the extension part 312 away from the battery high-voltage module, and the first protective plate 330 and the extension part 312 are fixedly connected by stir friction welding. The box body 300 also includes a second protective plate 360, which is arranged at the bottom of the battery cell and is used to support the battery cell, and the second protective plate 360 ​​extends to the side of the thermal management component 320 away from the battery high-voltage module.

[0153] In this embodiment, by setting the thermal management component 320 in the through hole formed by the beam body 310, and fixing the thermal management component 320 and the beam body 310 by stir friction welding, the size of the box body 300 in the thickness direction Z can be greatly reduced, and no additional blocking measures are required, which can reduce costs. In addition, a first protective plate 330 is provided at the bottom of the thermal management component 320 to enhance the strength of the box body 300. Finally, a buffer 340 is provided between the first protective plate 330 and the thermal management component 320 to reduce the impact of the bottom ball hitting on the inside of the battery.

[0154] The embodiment of the present application further provides a battery, comprising a battery high voltage module and a box body 300 as described in the above various embodiments. The battery high voltage module is accommodated in a first accommodation space 301 of the box body 300 .

[0155] Optionally, in a direction perpendicular to the thickness direction Z of the heat management component 320 , the first accommodation space 301 is located at an end of the box body 300 .

[0156] Optionally, the battery further includes a battery cell, and the battery cell is disposed in a second accommodation space 302 of the box body 300 , and the second accommodation space 302 is adjacent to the first accommodation space 301 .

[0157] The embodiment of the present application further provides an electrical device, including a battery having a housing 300 of the various embodiments described above, and the battery is used to provide electrical energy to the electrical device.

[0158] The electrical device can be Figure 1 The vehicle shown may also be any device using a battery.

[0159] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A box, characterized in that: include: A plurality of beam bodies (310) are enclosed to form a first accommodation space (301), wherein the first accommodation space (301) is used to accommodate a battery high voltage module; A thermal management component (320) is arranged to intersect the beam body (310) and is used to adjust the temperature of the battery high voltage module; Wherein, in the thickness direction (Z) of the thermal management component (320), the thermal management component (320) is located in the first accommodating space (301).

2. The box according to claim 1, characterized in that: The beam body (310) comprises a main body portion (311) and an extension portion (312) which are connected to each other; the extension portion (312) extends from the main body portion (311) toward the first accommodating space (301); and the heat management component (320) is fixedly connected to the extension portion (312).

3. The box according to claim 2, characterized in that: A surface (3121) of the extension portion (312) facing the battery high voltage module is flush with a surface (3201) of the thermal management component (320) facing the battery high voltage module.

4. The box according to any one of claims 1 to 3, characterized in that: The heat management component (320) and the beam body (310) are fixedly connected by welding.

5. The box according to any one of claims 1 to 4, characterized in that: The heat management component (320) comprises a first heat exchange plate (321), and the flow channel (3213) of the first heat exchange plate (321) is curved.

6. The box according to claim 5, characterized in that: The box (300) further includes: A first protective plate (330) is arranged to intersect the beam body (310) and is arranged on a side of the first heat exchange plate (321) away from the first accommodating space (301).

7. The box according to claim 6, characterized in that: In the thickness direction (Z) of the heat management component (320), the first protection plate (330) is located in the first accommodating space (301).

8. The box according to claim 6 or 7, characterized in that: A buffer member (340) is provided between the first heat exchange plate (321) and the first protective plate (330).

9. The box according to any one of claims 1 to 5, characterized in that: The heat management component (320) comprises a second heat exchange plate (322), and the flow channel (3221) of the second heat exchange plate (322) is linear.

10. The box according to claim 9, characterized in that: The second heat exchange plate (322) has openings (3222) at both ends along a first direction (X), the first direction (X) being the extension direction of the flow channel (3221), and the box body (300) further comprises: A sealing strip (350) is disposed at the opening (3222) and is used to seal the opening (3222).

11. The box according to claim 10, characterized in that: The sealing strip (350) is a metal strip, and the metal strip is fixedly connected to the second heat exchange plate (322) by welding.

12. The box according to claim 11, characterized in that: The metal strip passes through the second heat exchange plate (322) along a second direction (Y), and the second direction (Y) is the length direction of the metal strip.

13. The box according to any one of claims 1 to 12, characterized in that: In a direction perpendicular to a thickness direction (Z) of the heat management component (320), the first accommodation space (301) is located at an end of the box body (300).

14. The box according to any one of claims 1 to 13, characterized in that: The plurality of beam bodies (310) further enclose a second accommodating space (302), the second accommodating space (302) being adjacent to the first accommodating space (301), and the second accommodating space (302) being used to accommodate a battery cell, and the box body (300) further comprises: A second protective plate (360) is used to support the battery cell, and the second protective plate (360) extends to a side of the thermal management component (320) away from the battery high voltage module.

15. A battery, characterized in that: It comprises a battery high-voltage module and a box body (300) according to any one of claims 1 to 14, wherein the battery high-voltage module is arranged in a first accommodating space (301) of the box body (300).

16. The battery according to claim 15, characterized in that In a direction perpendicular to the heat management component (320), the first accommodating space (301) is located at an end of the box body (300).

17. The battery according to claim 15 or 16, characterized in that: The battery further comprises a battery cell, wherein the battery cell is arranged in a second accommodation space (302) of the box body (300), and the second accommodation space (302) is adjacent to the first accommodation space (301).

18. An electrical device, characterized in that: The invention comprises a battery as claimed in any one of claims 15 to 17, wherein the battery is used to provide electrical energy to the electrical device.

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