Battery and electric equipment

Abstract

The invention relates to the technical field of batteries, in particular to a battery and electric equipment. The battery comprises a box body, a cover plate, a battery monomer and a heat management part, the box body comprises a containing cavity and an opening communicated with the containing cavity, the cover plate is located above the box body and covers the opening, the battery monomer is placed in the containing cavity, the heat management part is located between the battery monomer and the cover plate, and the heat management part is in heat conduction connection with the battery monomer and the cover plate. According to the battery provided by the invention, the heat management component can be used for conducting heat for the battery monomers, and can also be used for conducting heat for the structural member on one side, far away from the battery monomers, of the cover plate upwards through the cover plate, so that heat management can be performed on parts on two sides simultaneously, and effective utilization of the heat management component is improved.

Description

Technical Field

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

[0002] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0003] Since the uneven working environment temperature of the battery cells in the battery can easily cause a decline in battery performance and a shortening of the battery life, traditional batteries are generally equipped with thermal management components for thermal management of the battery cells. Summary of the invention

[0004] In view of the defects of the prior art, the purpose of the present application is to provide a battery and an electrical device, which can improve the effective utilization of thermal management components.

[0005] The first aspect of the present application discloses a battery, the battery comprising:

[0006] A box body and a cover plate, wherein the box body comprises a receiving cavity and an opening connected to the receiving cavity, and the cover plate is located above the box body and covers the opening;

[0007] The battery cell is placed in the accommodation cavity;

[0008] The heat management component is located between the battery cell and the cover plate, and the heat management component is thermally connected to the battery cell and the cover plate.

[0009] According to the battery of the present application, the thermal management component can be used to conduct heat to the battery cell, and can also conduct heat upward to the structural parts on the side of the cover plate away from the battery cell through the cover plate, and can perform thermal management on the components on both sides at the same time, thereby improving the effective use of the thermal management component. For example, the cockpit floor of the vehicle can be connected to the cover plate, or the cockpit floor can be directly formed by the cover plate. Since the thermal management component is thermally connected to the battery cell and the cover plate, the thermal management component can effectively conduct heat to the battery cell, and can also effectively conduct heat to the cover plate, and conduct heat to the cockpit floor through the cover plate. When the temperature of the battery cell or the cockpit floor is low, the battery cell and the cockpit floor can be heated by the thermal management component, or when the temperature of the battery cell or the cockpit floor rises, the thermal management component can be used to dissipate heat from the battery cell and the cockpit floor, thereby reducing the temperature of the battery cell and the cockpit floor, improving the comfort in the cockpit, and reducing the adverse effects of heat on the battery cell.

[0010] In some embodiments of the present application, the cover plate is made of metal.

[0011] Compared with the existing covers which are mostly made of non-metallic materials, the metal covers have better thermal performance, thereby facilitating heat conduction between the thermal management components and the cover.

[0012] In some embodiments of the present application, the connection method between the thermal management component and the cover plate includes one or more of bonding, bolting and welding.

[0013] The thermal management component can be fixed to the bottom of the cover plate by one or more of the above connection methods, so that heat is conducted to the cover plate by the thermal management component.

[0014] In some embodiments of the present application, the thermal management component is bonded to at least a portion of the battery cells by thermally conductive adhesive.

[0015] The thermal conductive adhesive has good thermal conductivity and bonding properties, and can effectively fix the battery cell to the cover plate and conduct heat between the cover plate.

[0016] In some embodiments of the present application, the battery cell includes a pressure relief mechanism and a first end surface facing the thermal management component, and the pressure relief mechanism is located on other end surfaces of the battery cell except the first end surface.

[0017] The battery cell is connected to the thermal management component through the first end face, so that the battery cell is fixedly connected to the thermal management component and can conduct heat with the thermal management component. Since the pressure relief mechanism is located on the end faces of the battery cell other than the first end face, when the battery cell is in an abnormal thermal runaway state, it can reduce the risk of the battery cell spraying high-temperature, hot, or even flaming substances through the pressure relief mechanism to damage the thermal management component, causing liquid leakage in the thermal management component to cause liquid conductivity, thermal management failure, and other risks. In addition, high-temperature, hot, or even flaming substances will not be sprayed toward one side of the cover plate through the pressure relief mechanism, avoiding the thermal anomaly on the battery cell side from spreading to the other side of the cover plate.

[0018] In some embodiments of the present application, the battery cell further includes a second end surface facing away from the thermal management component, and the pressure relief mechanism is located on the second end surface.

[0019] The second end face is arranged away from the first end face, so that when the battery cell is in an abnormal thermal runaway state, the battery cell can further reduce the risk of spraying high-temperature, hot and even flaming substances through the pressure relief mechanism to damage the thermal management components, causing liquid leakage in the thermal management components to cause liquid conductivity, thermal management failure and other risks. In addition, high-temperature, hot and even flaming substances will not be sprayed toward one side of the cover plate through the pressure relief mechanism, thereby avoiding the thermal anomaly on the battery cell side from spreading to the other side of the cover plate.

[0020] In some embodiments of the present application, the thermal management component includes a heat exchange member and a current collecting member, the heat exchange member has a heat conduction cavity, the current collecting member has a current collecting cavity, the heat conduction cavity and the current collecting cavity are connected and are both used to accommodate a heat conduction medium.

[0021] The heat exchange element is used for thermally connecting with at least part of the battery cells, and / or the heat exchange element is used for thermally connecting with the cover plate.

[0022] Since the heat-conducting cavity and the current collecting cavity are connected and are both used to accommodate the heat-conducting medium, the heat-conducting medium can flow into the interior of the heat-conducting cavity through the current collecting cavity, and respectively conduct heat to the battery cells and the cover plate connected to the heat exchange element. After heat conduction, the heat-conducting medium can also flow out of the heat-conducting cavity through the current collecting cavity, thereby continuously conducting heat to the battery cells and the cover plate through the circulating flow of the heat-conducting medium.

[0023] In some embodiments of the present application, the minimum thickness dimension of the heat exchange element along the vertical direction is h1, and the value range of h1 is 0.2mm≤h1≤50mm. Preferably, the value range of h1 is 2mm≤h1≤10mm.

[0024] Since the weight of the battery is at least partially borne by the heat exchange element, if the minimum thickness of the heat exchange element is too small, the heat exchange element may be easily damaged such as bending or disconnecting. The minimum thickness of the heat exchange element within this range can reduce the probability of the heat exchange element being damaged such as bending or disconnecting.

[0025] In some embodiments of the present application, the weight of the battery is M, wherein 0.0002 mm / Kg≤h1 / M≤5 mm / Kg, preferably, 0.002 mm / Kg≤h1 / M≤1 mm / Kg.

[0026] Since the weight of the battery is at least partially borne by the heat exchange element, if the battery weight is large and the minimum thickness of the heat exchange element is too small, the heat exchange element may easily be damaged by bending, disconnecting, etc. Therefore, the ratio of the minimum thickness of the heat exchange element to the battery weight within this range can reduce the probability of the heat exchange element being damaged by bending, disconnecting, etc.

[0027] In some embodiments of the present application, the heat exchange element is connected to the current collecting element, and the current collecting element is connected to at least one of the box body or the cover plate. The minimum thickness dimension of the current collecting element along the vertical direction is h2, and the value range of h2 is 0.5mm≤h2≤50mm. Preferably, the value range of h2 is 2mm≤h2≤20mm.

[0028] Since the weight of the battery cell is at least partially borne by the heat exchange element, and the heat exchange element is connected to the current collector, at least part of the weight of the battery cell can be transferred to the current collector through the heat exchange element. If the minimum thickness of the current collector is too small, it is easy for the current collector to be damaged by bending, breaking, etc. Therefore, the minimum thickness of the current collector within this range can reduce the probability of damage such as bending and breaking of the current collector.

[0029] In some embodiments of the present application, the weight of the battery is M, wherein 0.0005 mm / Kg≤h2 / M≤10 mm / Kg, preferably, 0.002 mm / Kg≤h2 / M≤2 mm / Kg.

[0030] Since the weight of the battery is at least partially borne by the heat exchange element, if the battery weight is large and the minimum thickness of the current collector is too small, it is easy for the current collector to be damaged such as bending or breaking. Therefore, the ratio of the minimum thickness of the current collector to the battery weight within this range can reduce the probability of damage such as bending or breaking of the current collector.

[0031] In some embodiments of the present application, the box body includes a plurality of box beams connected to the cover plate, the box beams are formed with receiving grooves, and at least a portion of the current collecting member is located in the receiving grooves.

[0032] The box beam is used to connect the cover plate of the box body and has a certain supporting strength. By arranging a receiving groove on the box beam and placing at least part of the current collector in the receiving groove, the available space occupied by the current collector in the box body is reduced, thereby facilitating the arrangement of more battery cells in the box body and improving the power supply capacity of the battery.

[0033] In some embodiments of the present application, the box beam includes a partition beam, which is used to divide the accommodating cavity into at least two chambers, the at least two chambers including a first chamber for placing a battery cell, and the surface of the partition beam facing the first chamber or the surface facing the cover plate has a accommodating groove.

[0034] The heat exchange component can be distributed in the first chamber to conduct heat to the battery cell, and the current collector is arranged in the receiving groove on the partition beam. Through the above scheme, the current collector does not occupy the space in the first chamber, which is conducive to arranging more battery cells in the first chamber. Moreover, the current collector is closer to the first chamber, which is convenient for connecting the heat exchange component and the current collector, and can avoid the heat exchange component exceeding the first chamber too much to cause material waste.

[0035] In some embodiments of the present application, there are multiple heat exchange elements and they are spaced apart along a first direction. The current collecting element extends along the first direction and is connected to the multiple heat exchange elements along a second direction. The first direction and the second direction are perpendicular to each other.

[0036] The width dimension of the current collecting member along the second direction is h3, and the value range of h3 is 0.5mm≤h3≤100mm. Preferably, the value range of h3 is 3mm≤h3≤20mm.

[0037] Since the current collector is used to collect the heat-conducting medium flowing into or out of the heat exchange element, if the width of the current collector is too small, it will be difficult to meet the flow collection requirements of multiple heat exchange elements. If the width of the current collector is too large, it will take up too much space and cause the battery to be too large. Therefore, the width of the current collector should be controlled within this range.

[0038] In some embodiments of the present application, the box body includes a first side beam, the receiving groove is located on the first side beam, and the width dimension of the first side beam along the second direction is h4, wherein 0.005<h3 / h4≤50, preferably, 0.03<h3 / h4≤10.

[0039] The first side beam is arranged close to the edge of the box body, and the receiving groove is located on the first side beam, which is convenient for the setting of the current collector. Since the weight of the battery is at least partially borne by the heat exchange component, and the heat exchange component is connected to the current collector, at least part of the weight of the battery is transferred to the current collector through the heat exchange component. If the ratio of h3 to h4 is too small, when the size of the first side beam is constant, the width of the current collector is likely to be too small, and the current collector is likely to be damaged by bending, disconnection, etc. If the ratio of h3 to h4 is too large, a larger receiving groove needs to be opened on the first side beam, which is likely to cause the strength of the first side beam to be too low and the reliability to be reduced. Therefore, the ratio of the width of the current collector to the width of the first side beam is controlled within this range to achieve better results.

[0040] A second aspect of the present application provides an electrical device, the electrical device comprising any of the batteries described above, wherein the battery is used to provide electrical energy to the electrical device.

[0041] In some embodiments of the second aspect of the present application, the electrical equipment may be a vehicle, and the cover plate may be configured as a cabin floor of the vehicle.

[0042] By configuring the cover plate as the vehicle's cab floor, that is, at least a portion of the cab floor is used to form the cover plate, and since the thermal management component is heat-conductingly connected to the battery cell and the cover plate, the thermal management component can effectively conduct heat to the battery cell and the cab floor. When the temperature of the battery cell or the cab floor is low, the thermal management component can be used to heat the battery cell and the cab floor. Alternatively, when the temperature of the battery cell or the cab floor rises, the thermal management component can be used to dissipate heat from the battery cell and the cab floor, thereby reducing the temperature of the battery cell and the cab floor, improving the comfort in the cab, and reducing the adverse effects of heat on the battery cell.

[0043] In some embodiments of the present application, a seat crossbeam is connected to the cover plate.

[0044] Since the thermal management component can effectively conduct heat to both the battery cells and the cover plate, by connecting the cover plate to the seat beam, the seat beam can be heat conducted through the cover plate. Therefore, when the temperature of the seat beam is low, the seat beam can be heated by the thermal management component. Alternatively, when the temperature of the seat beam rises, the seat beam can be cooled by the thermal management component to reduce the temperature of the seat beam and improve the comfort of the seat beam.

[0045] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0047] Figure 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application;

[0048] Figure 2 This is a schematic diagram of the connection structure between the battery and the seat crossbeam provided in one embodiment of the present application;

[0049] Figure 3 is a schematic diagram of the exploded structure of a battery and a seat crossbeam provided in one embodiment of the present application;

[0050] Figure 4 It is a schematic diagram of the AA cross-sectional structure of a battery and a seat crossbeam provided in one embodiment of the present application;

[0051] Figure 5 It is a schematic diagram of the enlarged structure of the battery and the seat crossbeam B provided in one embodiment of the present application;

[0052] Figure 6 is a schematic diagram of the AA cross-sectional structure of a battery and a seat crossbeam provided by another embodiment of the present application;

[0053] Figure 7 is a schematic diagram of an enlarged structure of a battery and a seat crossbeam C portion provided by another embodiment of the present application;

[0054] Figure 8is a schematic diagram of the AA cross-sectional structure of a battery and a seat crossbeam provided by another embodiment of the present application;

[0055] Fig. 9 is a schematic diagram of an enlarged structure of a battery and a seat crossbeam D portion provided in another embodiment of the present application;

[0056] Fig.10 is a schematic diagram of the AA cross-sectional structure of a battery and a seat crossbeam provided by another embodiment of the present application;

[0057] Fig.11 It is a schematic diagram of the enlarged structure of the battery and the E part of the seat beam provided in another embodiment of the present application.

[0058] Fig.12 is a schematic structural diagram of a heat exchange element provided in one embodiment of the present application;

[0059] Fig.13 is a schematic structural diagram of a heat exchange element provided in another embodiment of the present application;

[0060] Fig.14 It is a schematic diagram of the cross-sectional structure of a battery and a seat cross beam FF provided in one embodiment of the present application;

[0061] Fig.15 It is a schematic diagram of the enlarged structure of the battery and the G portion of the seat beam provided in one embodiment of the present application;

[0062] Fig.16 is a schematic diagram of a cross-sectional structure of a battery and a seat cross beam FF provided in another embodiment of the present application;

[0063] Fig.17 It is a schematic diagram of the enlarged structure of the battery and the H portion of the seat beam provided in another embodiment of the present application.

[0064] The reference numerals in the specific implementation manner are as follows:

[0065] 1. Vehicles;

[0066] 10. Battery; 11. Controller; 12. Motor; 13. Frame; 14. Seat beam;

[0067] 20. Box body; 21. Cover plate; 22. Bottom plate; 23. Enclosure plate; 231. First side beam; 24. Raised portion; 25. Accommodating groove;

[0068] 30. Battery assembly; 31. Battery cell; 311. First electrode terminal; 312. Second electrode terminal; 313. Pressure relief mechanism;

[0069] 40. Thermal management component; 41. Heat exchange component; 42. First current collecting component; 421. First pipe section; 422. Second pipe section; 43. Second current collecting component; 44. Liquid inlet end; 45. Liquid outlet end. DETAILED DESCRIPTION

[0070] The following detailed description of the implementation of the technical solution of the present application is provided in conjunction with the accompanying drawings. The following implementation is only used to more clearly illustrate the technical solution of the present application, and is therefore only used as an example, and cannot be used to limit the scope of protection of the present application.

[0071] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0072] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0073] In addition, the technical terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0074] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0075] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0076] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields.

[0077] When the battery is working in an electrical device, the heat generated by the parts of the electrical device on the outside of the cover plate is easily accumulated inside the electrical device, causing abnormal temperature rise of the electrical device and causing abnormal use. Alternatively, the parts on the outside of the cover plate of the electrical device may also cause abnormal use status when the ambient temperature is low. Even the temperature abnormality on the electrical device side may be transferred to the battery cell through the battery cover plate, thereby affecting the ambient temperature of the battery cell, which may easily cause the battery's working performance to decline and shorten its life. For example, when the electrical device is a vehicle, the battery in the vehicle is generally located under the driving cabin, and part of the heat in the driving cabin may be transferred to the battery cell through the battery cover plate, thereby affecting the working environment temperature of the battery cell.

[0078] In view of the defects of the prior art, the purpose of the present application is to provide a battery and an electrical device having the battery, which can effectively utilize the thermal management components in the battery to conduct heat to the components of the electrical device through the cover plate, and can also to a certain extent block the components on the electrical device side from causing adverse thermal effects on the battery cells through the cover plate.

[0079] To solve the above problems, the present application connects the battery cell and the cover plate through thermal management components. The thermal management components can effectively conduct heat to the battery cell, and can also effectively conduct heat to the cover plate, and conduct heat to the components on the outside of the cover plate through the cover plate. When the temperature of the battery cell or the components on the outside of the cover plate is low, the battery cell and the components on the outside of the cover plate can be heated by the thermal management components. Alternatively, when the temperature of the battery cell or the outside of the cover plate rises, the battery cell and the components on the outside of the cover plate can be dissipated by the thermal management components to reduce the temperature of the battery cell and the components on the outside of the cover plate, so that the thermal conduction function of the thermal management components is more widely used, thereby improving the effective use of the thermal management components.

[0080] Based on the above considerations, the present application provides a battery and an electric device having the battery. The battery is suitable for various electric devices using batteries, such as electric vehicles, electric toys, electric tools, electric vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.; the battery is used to provide electrical energy for the above electric devices.

[0081] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the batteries and electrical equipment described above, but can also be applied to all batteries including a box and electrical equipment using the battery. However, for the sake of simplicity, the following embodiments are described using the battery for electric vehicles as an example.

[0082] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1 provided for some embodiments of the present application. The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 10 is provided inside the vehicle 1, and the battery 10 may be provided at the bottom, the head or the tail of the vehicle 1. The battery 10 may be used to power the vehicle 1, for example, the battery 10 may be used as an operating power source for the vehicle 1. The vehicle 1 may further include a controller 11, a motor 12 and a frame 13, wherein the battery 10, the controller 11 and the motor 12 are respectively provided on the frame 13, and the controller 11 is used to control the battery 10 to power the motor 12, for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.

[0083] In some embodiments of the present application, the battery 10 can be used not only 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. The battery 10 mentioned in the present application can also be referred to as a battery pack.

[0084] Combination Figure 1 and Figure 3 As shown, in some embodiments of the present application, the battery 10 includes a case body 20, a cover plate 21, a battery cell 31 and a thermal management component 40, the case body 20 includes a accommodating cavity and an opening connected to the accommodating cavity, the cover plate 21 is located above the case body 20 and covers the opening, the battery cell 31 is placed in the accommodating cavity, the thermal management component 40 is located between the battery cell 31 and the cover plate 21, and the thermal management component 40 is thermally connected to the battery cell 31 and the cover plate 21.

[0085] Specifically, the box 20 can be used to accommodate the battery cells 31 to prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells 31. The box 20 can be a simple three-dimensional structure such as a single cuboid, cylinder or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders or spheres. The embodiment of the present application is only illustrated by taking the box 20 as a cuboid. The material of the box 20 can be an alloy material such as aluminum alloy, iron alloy, etc., or a polymer material such as polycarbonate, polyisocyanurate foam plastic, or a composite material such as glass fiber plus epoxy resin.

[0086] In some embodiments of the present application, the box body 20 may include a surrounding plate 23 and a bottom plate 22, wherein the bottom plate 22 and the surrounding plate 23 may be an integral structure, or a detachable structure, the bottom plate 22 and the surrounding plate 23 together form a accommodating cavity, the bottom plate 22 and the cover plate 21 are respectively arranged at both ends of the surrounding plate 23, and the surrounding plate 23 is clamped between the cover plate 21 and the bottom plate 22.

[0087] In order to meet different power requirements, the battery 10 may include a plurality of battery cells 31, which are the smallest units constituting the battery assembly 30 or the battery 10. The plurality of battery cells 31 may be connected in series, in parallel, or in hybrid connection via electrode terminals, wherein hybrid connection refers to a mixture of series connection and parallel connection.

[0088] The battery assembly 30 may include one or more battery cells 31. Multiple battery cells 31 may be connected in series, in parallel, or in mixed series to form the battery assembly 30, and multiple battery assemblies 30 may be connected in series, in parallel, or in mixed series to form the battery 10. The battery cell 31 may be cylindrical, flat, rectangular, or in other shapes. The battery cells 31 are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells, and soft-pack battery cells.

[0089] A heat conduction cavity may be provided inside the thermal management component 40 for accommodating flowing fluid, and a circulating pump may be provided on the thermal management component 40 itself or externally for circulating the fluid inside the thermal management component 40 to prevent heat concentration and enable continuous heat conduction.

[0090] The thermal management component 40 is thermally connected to the battery cell 31 and the cover plate 21, including direct connection and indirect connection. The direct connection means that the thermal management component 40 is respectively attached to the battery cell 31 and the cover plate 21 without any connector or thermal conductive adhesive in between. The indirect connection means that the thermal management component 40 is respectively connected to the battery cell 31 or the cover plate 21 through a connector or thermal conductive adhesive and heat is conducted.

[0091] According to the battery 10 of the present application, the thermal management component 40 can be used to conduct heat to the battery cell 31, and can also conduct heat upward to the structural parts on the side of the cover plate 21 away from the battery cell 31 through the cover plate 21, and can perform thermal management on the components on both sides at the same time, thereby improving the effective utilization of the thermal management component 40. For example, the cockpit floor of the vehicle 1 can be connected to the cover plate 21, or the cockpit floor can be directly formed by the cover plate 21. Since the thermal management component 40 is thermally connected to the battery cell 31 and the cover plate 21, the thermal management component 40 can effectively conduct heat to the battery cell 31, and can also effectively conduct heat to the cover plate 21, and conduct heat to the cockpit floor through the cover plate 21. When the temperature of the battery cell 31 or the cockpit floor is low, the battery cell 31 and the cockpit floor can be heated by the thermal management component 40, or when the temperature of the battery cell 31 or the cockpit floor rises, the thermal management component 40 can dissipate heat from the battery cell 31 and the cockpit floor, thereby reducing the temperature of the battery cell 31 and the cockpit floor, improving the comfort in the cockpit, and reducing the adverse effects of heat on the battery cell 31.

[0092] like Figure 3 As shown, in some embodiments of the present application, the cover plate 21 is made of metal.

[0093] Specifically, the cover plate 21 can be a steel plate, an aluminum plate or other metal plate with thermal conductivity. Compared with the existing cover plates 21 which are mostly made of non-metallic materials, the metal cover plate 21 has better thermal conductivity, thereby facilitating heat conduction between the thermal management component 40 and the cover plate 21.

[0094] like Figure 3 As shown, in some embodiments of the present application, the connection method between the thermal management component 40 and the cover plate 21 includes one or more of bonding, bolting and welding.

[0095] The heat management component 40 can be fixed to the bottom of the cover plate 21 by one or more of the above connection methods, so that heat is conducted to the cover plate 21 by the heat management component 40 .

[0096] like Figure 3 As shown, in some embodiments of the present application, the thermal management component 40 is bonded to at least a portion of the battery cell 31 by a thermally conductive adhesive.

[0097] The thermal conductive adhesive has good thermal conductivity and bonding properties, and can effectively fix the battery cell 31 to the cover plate 21 and conduct heat between the battery cell 31 and the cover plate 21 .

[0098] Combination Figures 3 to 5As shown, in some embodiments of the present application, the battery cell 31 includes a pressure relief mechanism 313 and a first end surface facing the thermal management component 40 , and the pressure relief mechanism 313 is located on other end surfaces of the battery cell 31 except the first end surface.

[0099] Specifically, the battery cell 31 may have multiple end surfaces, including a first end surface, through which the battery cell 31 may be thermally connected to the thermal management component 40, and the pressure relief mechanism 313 may be disposed on any end surface of the multiple end surfaces except the first end surface.

[0100] When the battery cell 31 is in an abnormal thermal runaway state, the battery cell 31 can be reduced from spraying high-temperature, hot, or even flaming substances through the pressure relief mechanism 313 to damage the thermal management component 40, thereby reducing the risk of liquid leakage in the thermal management component 40 causing liquid conductivity, thermal management failure, and other risks. In addition, high-temperature, hot, or even flaming substances will not be sprayed toward one side of the cover plate 21 through the pressure relief mechanism 313, thereby preventing the thermal anomaly on the battery cell 31 side from spreading to the other side of the cover plate 21.

[0101] In some embodiments of the present application, the battery cell 31 further includes a second end surface facing away from the thermal management component 40 , and the pressure relief mechanism 313 is located on the second end surface.

[0102] Specifically, the first end face and the second end face are respectively arranged at the two ends of the battery cell 31, so that the second end face has a maximum spacing dimension with the first end face compared with the other end faces of the battery cell 31. Therefore, when the battery cell 31 is in an abnormal thermal runaway state, it can further reduce the risk that the battery cell 31 will spray high-temperature, high-heat or even flaming substances through the pressure relief mechanism 313 to damage the thermal management component 40, causing liquid leakage in the thermal management component 40 to cause liquid conductivity, thermal management failure and other risks. In addition, high-temperature, high-heat or even flaming substances will not be sprayed toward one side of the cover plate 21 through the pressure relief mechanism 313, thereby avoiding the thermal anomaly on the side of the battery cell 31 from spreading to the other side of the cover plate 21.

[0103] Combination Figures 3 to 5 As shown, in some embodiments of the present application, the battery cell 31 may be a prismatic battery, including a first end face and a second end face arranged opposite to each other in the vertical direction, wherein the first end face is connected to the thermal management component 40, and the second end face is arranged toward the bottom plate 22. The second end face includes a first electrode terminal 311, a second electrode terminal 312, and a pressure relief mechanism 313, and the first electrode terminal 311, the second electrode terminal 312, and the pressure relief mechanism 313 are arranged toward the bottom plate 22, respectively, and a gap is provided between the first electrode terminal 311, the second electrode terminal 312, and the pressure relief mechanism 313, so as to facilitate the pressure relief of the pressure relief mechanism 313, and facilitate the setting of the connection structure between the first electrode terminal 311 and the second electrode terminal 312 of different battery cells 31.

[0104] Combination Figure 3 , Figure 6 and Figure 7 As shown, in some embodiments of the present application, the battery cell 31 is a cubic battery, including a first end face and a second end face arranged opposite to each other in the vertical direction, wherein the first end face is connected to the thermal management component 40, and the second end face is arranged toward the bottom plate 22. Among them, the first end face has the largest area, so that the connection strength between the battery cell 31 and the thermal management component 40 can be improved, and the heat conduction area between the battery cell 31 and the thermal management component 40 can be improved, and the heat conduction speed can be improved. The battery cell 31 also includes a plurality of side faces arranged between the first end face and the second end face, wherein the first electrode terminal 311, the second electrode terminal 312 and the pressure relief mechanism 313 are arranged on the side facing the enclosure 23, and the first electrode terminal 311, the second electrode terminal 312 and the pressure relief mechanism 313 are respectively provided with gaps with the enclosure 23, so as to facilitate the pressure relief of the pressure relief mechanism 313, and facilitate the setting of the connection structure between the first electrode terminal 311 and the second electrode terminal 312 between different battery cells 31.

[0105] Combination Figure 3 , Figure 8 and Fig. 9 As shown, in some embodiments of the present application, the battery cell 31 is a strip-shaped battery, including a first end face and a second end face arranged opposite to each other in the vertical direction, wherein the first end face is connected to the thermal management component 40, and the second end face is arranged toward the bottom plate 22. The battery cell 31 also includes a plurality of side faces arranged between the first end face and the second end face, wherein the side face facing the enclosure 23 is provided with a first electrode terminal 311, a second electrode terminal 312, and a pressure relief mechanism 313, and gaps are respectively provided between the first electrode terminal 311, the second electrode terminal 312, and the pressure relief mechanism 313 and the enclosure 23, so as to facilitate the pressure relief of the pressure relief mechanism 313, and facilitate the setting of the connection structure between the first electrode terminal 311 and the second electrode terminal 312 between different battery cells 31.

[0106] Combination Figure 3 , Fig.10 and Fig.11 As shown, in some embodiments of the present application, the battery cell 31 is a cylindrical battery, including a first end face and a second end face arranged opposite to each other in the vertical direction, wherein the first end face is connected to the thermal management component 40, and the second end face is arranged toward the bottom plate 22. Among them, a first electrode terminal 311 is arranged on the first end face, and a second electrode terminal 312 and a pressure relief mechanism 313 are arranged on the second end face, and gaps are respectively arranged between the second electrode terminal 312 and the pressure relief mechanism 313 and the bottom plate 22, so as to facilitate the pressure relief of the pressure relief mechanism 313 and facilitate the setting of the connection structure between the second electrode terminals 312 of different battery cells 31.

[0107] Combination Figure 3 , Fig.12 and Fig.13 As shown, in some embodiments of the present application, the thermal management component 40 includes a heat exchange element 41 and a current collecting element, the heat exchange element 41 has a heat conduction cavity, the current collecting element has a current collecting cavity, the heat conduction cavity and the current collecting cavity are connected and are both used to accommodate a heat conduction medium, the heat exchange element 41 is used to be thermally connected to at least part of the battery cells 1, and / or, the heat exchange element 41 is used to be thermally connected to the cover plate 21.

[0108] Specifically, the heat exchange element 41 may be a plate-shaped structure, such as Fig.12 Alternatively, the heat exchange element 41 may be a tubular structure, such as Fig.13 As shown. A collecting cavity is provided inside the current collector, and the collecting cavity is connected with the heat-conducting cavity, and is used to input a heat-conducting medium into the heat-conducting cavity or to output a heat-conducting medium from the heat-conducting cavity. The heat-conducting medium can flow into the interior of the heat-conducting cavity through the collecting cavity, and respectively conduct heat to the battery cell 31 and the cover plate 21 connected to the heat exchange component 41. The heat-conducting medium after heat conduction can also flow out of the heat-conducting cavity through the collecting cavity, so that the battery cell 31 and the cover plate 21 are continuously heat-conducted through the circulating flow of the heat-conducting medium. Among them, the current collector includes a first current collector 42 and a second current collector 43, and the first current collector 42 and the second current collector 43 are respectively connected with the heat exchange component 41.

[0109] Combination Figure 1 , Figures 3 to 5 As shown, in some embodiments of the present application, the minimum thickness dimension of the heat exchange element 41 along the vertical direction is h1, and the value range of h1 is 0.2mm≤h1≤50mm. Preferably, the value range of h1 is 2mm≤h1≤10mm.

[0110] Specifically, along the direction perpendicular to the cover plate 21, the minimum thickness dimension of the heat exchange element 41 is h1. h1 can be any value in the range of 0.2mm…0.3mm…1.0mm…49mm…50mm. Since the weight of the battery 10 is at least partially transferred to the vehicle 1 through the thermal management component 40, when the value of h1 is less than 0.2mm, the thickness dimension of the heat exchange element 41 is too small, which easily causes the heat exchange element 41 to be damaged by bending, disconnection, etc. When the value of h1 is greater than 50mm, the thickness dimension of the heat exchange element 41 will be too large, thereby increasing the weight and cost of the battery 10. When the value range of h1 is 0.2mm≤h1≤50mm, it can reduce the probability of damage such as bending and disconnection of the heat exchange element 41, effectively conduct heat to the battery cell 31, and reduce the weight and cost of the battery 10.

[0111] Preferably, h1 can be any value in the range of 2mm…2.5mm…5mm…9mm…10mm. When the value range of h1 is 2mm≤h1≤10mm, the probability of damage such as bending and disconnection of the heat exchange element 41 can be further reduced, the heat of the battery cell 31 can be effectively conducted, and the weight and cost of the battery 10 can be reduced.

[0112] Combination Figure 1 , Figures 3 to 5 As shown, in some embodiments of the present application, the weight of the battery 10 is M, wherein 0.0002 mm / Kg≤h1 / M≤5 mm / Kg, preferably, 0.002 mm / Kg≤h1 / M≤1 mm / Kg.

[0113] Specifically, the weight of the battery 10 includes the weight of the case 20, the weight of the cover 21, the weight of the battery assembly 30, and the sum of the weight of the thermal management component 40. h1 / M can be any value in the range of 0.0002mm / Kg…0.1mm / Kg…1mm / Kg…4mm / Kg…5mm / Kg. Since the weight of the battery 10 is at least partially borne by the heat exchange component 41, when the value of h1 / M is less than 0.0002mm / Kg, the heat exchange component 41 is easily damaged by bending, disconnection, etc. When the value of h1 / M is greater than 5mm / Kg, the thickness of the heat exchange component 41 will be too large, thereby increasing the weight and cost of the battery 10. When the value range of h1 / M is 0.0002mm / Kg≤h1 / M≤5mm / Kg, the probability of damage such as bending and disconnection of the heat exchange component 41 can be reduced, the heat of the battery cell 31 can be effectively conducted, and the weight and cost of the battery 10 can be reduced.

[0114] Preferably, h1 / M can be any value in the range of 0.002mm / Kg…0.01mm / Kg…0.1mm / Kg…0.5mm / Kg…1mm / Kg. When the value range of h1 / M is 0.002mm / Kg≤h1 / M≤1mm / Kg, the probability of damage such as bending and disconnection of the heat exchange element 41 can be further reduced, the heat of the battery cell 31 can be effectively conducted, and the weight and cost of the battery 10 can be reduced.

[0115] Combination Figure 1 , Figure 3 , Fig.12 , Figures 14 to 17 As shown, in some embodiments of the present application, the heat exchange element 41 is connected to the current collecting element, and the current collecting element is connected to at least one of the box body 20 or the cover plate 21. The minimum thickness dimension of the current collecting element along the vertical direction is h2, and the value range of h2 is 0.5mm≤h2≤50mm. Preferably, the value range of h2 is 2mm≤h2≤20mm.

[0116] For convenience of description, only the first current collecting member 42 is taken as an example for explanation.

[0117] Specifically, along the direction perpendicular to the cover plate 21, the minimum thickness dimension of the first current collector 42 is h2. h2 can be any value in the range of 0.5mm…0.8mm…1.0mm…49mm…50mm. Since the weight of the battery cell 31 is at least partially borne by the heat exchange component 41, and the heat exchange component 41 is connected to the first current collector 42, at least part of the weight of the battery cell 31 can be transferred to the first current collector 42 through the heat exchange component 41. When the value of h2 is less than 0.5mm, the thickness dimension of the first current collector 42 will be too small, which may easily cause the first current collector 42 to be damaged by bending, disconnection, etc. When the value of h2 is greater than 50mm, the thickness dimension of the first current collector 42 will be too large, thereby increasing the weight and cost of the battery 10. When the value range of h2 is 0.5 mm ≤ h2 ≤ 50 mm, the probability of the first current collecting member 42 being damaged such as bending or disconnection can be reduced, heat can be effectively conducted to the battery cell 31 , and the weight and cost of the battery 10 can be reduced.

[0118] Preferably, h2 can be any value in the range of 2mm…2.5mm…5mm…9mm…20mm. When the value range of h2 is 2mm≤h2≤20mm, the probability of the first current collector 42 being damaged such as bending or disconnection can be further reduced, the heat of the battery cell 31 can be effectively conducted, and the weight and cost of the battery 10 can be reduced.

[0119] Combination Figure 1 , Figure 3 , Fig.14 and Fig.15 As shown, in some embodiments of the present application, the weight of the battery 10 is M, wherein 0.0005 mm / Kg≤h2 / M≤10 mm / Kg, preferably, 0.002 mm / Kg≤h2 / M≤2 mm / Kg.

[0120] Specifically, h2 / M can be any value in the range of 0.0005mm / Kg…0.001mm / Kg…0.01mm / Kg…4mm / Kg…10mm / Kg. Since the weight of the battery 10 is at least partially borne by the heat exchange component 41, when the value of h2 / M is less than 0.0005mm / Kg, the thickness of the first current collector 42 will be too small, which may easily cause the first current collector 42 to be damaged by bending, disconnection, etc. When the value of h2 / M is greater than 10mm / Kg, the size of the first current collector 42 will be too large, thereby increasing the weight and cost of the battery 10. When the value range of h2 / M is 0.0005mm / Kg≤h2 / M≤10mm / Kg, it can reduce the probability of the first current collector 42 being damaged by bending, disconnection, etc., effectively conduct heat to the battery cell 31, and reduce the weight and cost of the battery 10.

[0121] Preferably, the value of h2 / M can be any value in the range of 0.002mm / Kg…0.01mm / Kg…0.1mm / Kg…0.5mm / Kg…2mm / Kg. When the value range of h2 / M is 0.002mm / Kg≤h2 / M≤2mm / Kg, the probability of the first current collector 42 being damaged by bending, disconnection, etc. can be further reduced, the heat of the battery cell 31 can be effectively conducted, and the weight and cost of the battery 10 can be reduced.

[0122] Combination Figure 3 , Fig.14 and Fig.15 As shown, in some embodiments of the present application, the box body 20 includes a plurality of box body beams connected to the cover plate 21 , and the box body beams are formed with receiving grooves 25 , and at least a portion of the current collecting member is located in the receiving grooves 25 .

[0123] Specifically, the box beam includes a plurality of side beams, which are arranged to form a frame structure of the enclosure 23 and are used to connect the box 20 and the cover 21, and have a certain support strength. The receiving groove 25 can be provided on any side beam. In some embodiments of the present application, the box beam may also include a partition beam (not shown in the figure), which is arranged inside the frame structure surrounded by the plurality of side beams, and the partition beam is used to connect the cover 21 of the box 20, has a certain support strength, and is used to separate the receiving cavity into at least two chambers, and at least one of the chambers is used to install the battery cell 31, and the receiving groove 25 can be provided on any partition beam.

[0124] By providing a receiving groove 25 on the box beam and positioning at least a portion of the first current collector 42 in the receiving groove 25, the available space occupied by the first current collector 42 in the box body 20 is reduced, thereby facilitating the arrangement of more battery cells 31 in the box body 20 and improving the power supply capacity of the battery 10.

[0125] Combination Figure 3 , Fig.14 and Fig.15 As shown, in some embodiments of the present application, the box beam includes a partition beam, which is used to divide the accommodating cavity into at least two chambers, and the at least two chambers include a first chamber for placing a battery cell 31, and the surface of the partition beam facing the first chamber or the surface facing the cover plate 21 has a accommodating groove 25.

[0126] The heat exchange component 41 can be distributed in the first chamber to conduct heat to the battery cell 31, and the first current collector 42 is arranged in the receiving groove on the partition beam. Through the above scheme, the first current collector 42 does not occupy the space in the first chamber, which is conducive to arranging more battery cells 31 in the first chamber. Moreover, the first current collector 42 is closer to the first chamber, which is convenient for connecting the heat exchange component 41 with the first current collector 42, and can avoid the heat exchange component 41 exceeding the first chamber too much to cause material waste.

[0127] Combination Figure 3 , Fig.12 , Fig.14 and Fig.15 As shown, in some embodiments of the present application, there are multiple heat exchange elements 41 and they are arranged at intervals along the first direction. The first current collecting element 42 extends along the first direction and is connected to the multiple heat exchange elements 41 along the second direction. The first direction and the second direction are perpendicular to each other. The width dimension of the first current collecting element 42 along the second direction is h3, and the value range of h3 is 0.5mm≤h3≤100mm. Preferably, the value range of h3 is 3mm≤h3≤20mm.

[0128] Specifically, the plane formed by the first direction and the second direction is arranged parallel to the plane where the cover plate 21 is located. The first direction is the width direction of the cover plate 21, and the second direction is the length direction of the cover plate 21. The value of h3 can be any value in the range of 0.5mm…1.5mm…5mm…50mm…100mm. Since the first current collector 42 is used to collect the heat-conducting medium flowing into or out of the heat exchange element 41, when the value of h3 is less than 0.5mm, the size of the first current collector 42 will be too small, and it will be difficult to meet the convergence requirements of multiple heat exchange elements 41. When the value of h3 is greater than 100mm, the size of the first current collector 42 will be too large, thereby increasing the weight and cost of the battery 10. When the value range of h3 is 0.5mm≤h3≤100mm, it can not only meet the convergence requirements of multiple heat exchange elements 41, effectively conduct heat to the battery cells 31, but also reduce the weight and cost of the battery 10.

[0129] Preferably, the value of h3 can be any value in the range of 3mm…3.5mm…5mm…10mm…20mm. When the value range of h3 is 3mm≤h3≤20mm, the convergence demand of multiple heat exchange components 41 can be further improved, the heat of the battery cell 31 can be effectively conducted, and the weight and cost of the battery 10 can be reduced.

[0130] Combination Figure 3 and Fig.12 As shown, in some embodiments of the present application, the thermal management component 40 includes at least two heat exchange elements 41 of plate-like structure, and the at least two heat exchange elements 41 are spaced apart in a first direction, wherein the first direction is perpendicular to the axial direction of the heat conduction cavity, and the current collecting element includes a first current collecting element 42 and a second current collecting element 43, and the first current collecting element 42 and the second current collecting element 43 extend along the second direction respectively, and the first end of the heat conduction cavity of any one of the at least two heat exchange elements 41 is connected to the first current collecting element 42, and the second end of the heat conduction cavity of any one of the at least two heat exchange elements 41 is connected to the second current collecting element 43.

[0131] Among them, the first collecting part 42 includes a first tube part 421 and a second tube part 422, and the first tube part 421 and the second tube part 422 are respectively arranged at the first end of the heat exchange element 41 and are disconnected, wherein the first tube part 421 is connected to the first end of a part of the heat exchange element 41, and the second tube part 422 is connected to the first end of another part of the heat exchange element 41, and one of the first tube part 421 and the second tube part 422 is provided with a liquid inlet end 44, and the other of the first tube part 421 and the second tube part 422 is provided with a liquid outlet end 45.

[0132] By connecting the first tube part 421 and the second tube part 422 to the first ends of all the heat exchange elements 41, and providing a liquid inlet end 44 in one of the first tube part 421 and the second tube part 422, and providing a liquid outlet end 45 in the other, the heat-conducting medium can be introduced into the heat exchange element 41 through the liquid inlet end 44, and flow out of the heat exchange element 41 through the liquid outlet end 45. During the flow of the heat-conducting medium, the heat-conducting medium can flow through all the heat exchange elements 41 through the second collector 43. At the same time, the liquid inlet end 44 and the liquid outlet end 45 are jointly provided at the first end, which can effectively reduce the size of the heat management component 40 along the second direction. The second direction is perpendicular to the first direction.

[0133] In some embodiments of the present application, the first current collecting member 42 and the second current collecting member 43 may also be complete tubular structures respectively, wherein the first current collecting member 42 is provided with a liquid inlet end 44, and the second current collecting member 43 is provided with a liquid outlet end 45, that is, the liquid inlet end 44 and the liquid outlet end 45 are respectively arranged at the two ends of the axial direction of the heat conduction cavity, and the liquid inlet end 44 and the liquid outlet end 45 are connected through the heat conduction cavity.

[0134] Combination Figure 3 and Fig.13 As shown, in some embodiments of the present application, the thermal management component 40 includes at least two tubular heat exchange elements 41, and the at least two heat exchange elements 41 are spaced apart in a first direction, where the first direction is the width direction of the cover plate 21, and any heat exchange element 41 includes a bent structure formed by connecting a plurality of tubular structures in sequence.

[0135] Combination Figure 3 , Figure 4 , Figure 5 and Fig.12 As shown, in some embodiments of the present application, a protrusion 24 is provided between any two adjacent heat exchange elements 41 among at least two heat exchange elements 41, the protrusion 24 is connected to the cover plate 21, and the surface of the protrusion 24 facing the battery cell 31 is flush with the surface of the heat exchange element 41 facing the battery cell 31.

[0136] Specifically, the heat exchange element 41 is fitted on the cover plate 21, and the portion between any two adjacent heat exchange elements 41 on the cover plate 21 is protruded toward the direction of the battery cell 31, thereby forming a protrusion 24. Alternatively, a groove for mounting the heat exchange element 41 is provided on the cover plate 21, and the heat exchange element 41 is disposed in the groove, and the portion between the grooves is protruded relative to the groove, thereby forming a protrusion 24.

[0137] Since any two adjacent heat exchange elements 41 are arranged at intervals, a protrusion 24 is provided between adjacent heat exchange elements 41, and the surface of the protrusion 24 facing the battery cell 31 is flush with the surface of the heat exchange element 41 facing the battery cell 31. Therefore, during the connection process between the battery cell 31 and the cover plate 21 through the heat exchange element 41, the battery cell 31 can be fixed by the protrusion 24 and the heat exchange element 41, thereby improving the fixing effect of the battery cell 31.

[0138] Combination Figure 3 , Fig.14 and Fig.15 As shown, in some embodiments of the present application, the box body 20 includes a first side beam 231, the receiving groove is located on the first side beam 231, and the width dimension of the first side beam 231 along the second direction is h4, wherein 0.005<h3 / h4≤50, preferably, 0.03<h3 / h4≤10.

[0139] Specifically, the first side beam 231 is disposed close to the edge of the box body 20, and the receiving groove 25 is located on the first side beam 231, so as to facilitate the arrangement of the first current collecting member 42. The value of h3 / h4 can be any value in the range of 0.005…0.01…5…10…50.

[0140] Since the weight of the battery 10 is at least partially carried by the heat exchanger 41, and the heat exchanger 41 is connected to the first current collector 42, at least part of the weight of the battery 10 is transferred to the first current collector 42 through the heat exchanger 41. When the value of h3 / h4 is less than 0.005, when the size of the first side beam 231 is constant, the width of the first current collector 42 relative to the first side beam 231 is too small, which easily causes the first current collector 42 to be damaged by bending, disconnection, etc. When the value of h3 / h4 is greater than 50, it is necessary to open a larger accommodating groove 25 on the first side beam 231, which easily causes the strength of the first side beam 231 to be too low and the reliability to be reduced. When the value range of h3 / h4 is 0.005<h3 / h4≤50, it can reduce the probability of the first current collector 42 being damaged by bending, disconnection, etc., effectively conduct heat to the battery cell 31, and at the same time improve the strength of the first side beam 231.

[0141] Preferably, the value of h3 / h4 can be any value in the range of 0.03…0.01…1…5…10. When the value range of h3 / h4 is 0.03<h3 / h4≤10, the probability of the first current collector 42 being damaged such as bending and disconnection can be further reduced, the heat of the battery cell 31 can be effectively conducted, and the strength of the first side beam 231 can be improved.

[0142] Combination Figure 3 , Fig.16 and Fig.17 As shown, in some embodiments of the present application, a receiving groove is provided on the cover plate 21 and is recessed away from the box body 20 , and at least a portion of the first current collecting member 42 is provided in the receiving groove of the cover plate 21 .

[0143] Since the area of ​​the cover plate 21 is relatively large, it is more convenient to arrange the accommodating groove, and the space of the box beam will not be occupied, thereby improving the supporting strength of the box beam.

[0144] Combination Figures 1 to 3 As shown, the second aspect of the present application proposes an electrical device, which includes a battery 10 according to any one of the above embodiments, wherein the battery 10 is used to provide electrical energy to the electrical device.

[0145] In some embodiments of the second aspect of the present application, the electrical equipment may be a vehicle 1 , and the cover plate 21 is configured as a floor of a cab of the vehicle 1 .

[0146] By configuring the cover plate 21 as the cockpit floor of the vehicle 1, that is, at least a portion of the cockpit floor is used to form the cover plate 21, since the thermal management component 40 is thermally connected to the battery cell 31 and the cover plate 21, the thermal management component 40 can effectively conduct heat to the battery cell 31 and the cockpit floor. When the temperature of the battery cell 31 or the cockpit floor is low, the battery cell 31 and the cockpit floor can be heated by the thermal management component 40, or when the temperature of the battery cell 31 or the cockpit floor rises, the thermal management component 40 can dissipate heat from the battery cell 31 and the cockpit floor, thereby reducing the temperature of the battery cell 31 and the cockpit floor, improving the comfort in the cockpit, and reducing the adverse effects of heat on the battery cell 31.

[0147] Combination Figures 1 to 3 As shown, in some embodiments of the present application, the cover plate 21 is connected to the seat cross beam 14 .

[0148] Since the thermal management component 40 can effectively conduct heat to the battery cell 31 and the cover plate 21, by connecting the cover plate 21 to the seat cross beam 14, the seat cross beam 14 can be heat-conducted through the cover plate 21. Therefore, when the temperature of the seat cross beam 14 is low, the seat cross beam 14 can be heated by the thermal management component 40, or, when the temperature of the seat cross beam 14 rises, the seat cross beam 14 can be cooled by the thermal management component 40, thereby reducing the temperature of the seat cross beam 14 and improving the comfort of the seat cross beam 14.

[0149] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0150] Combination Figures 1 to 3As shown, in some embodiments of the present application, the vehicle 1 includes a cockpit floor and a battery 10 disposed under the cockpit floor, the battery 10 includes a box body 20, a cover plate 21, a battery cell 31 and a thermal management component 40, the box body 20 includes a receiving cavity and an opening connected to the receiving cavity, the cover plate 21 is located above the box body 20 and covers the opening, the battery cell 31 is placed in the receiving cavity, the thermal management component 40 is located between the battery cell 31 and the cover plate 21, and the thermal management component 40 is thermally connected to the battery cell 31 and the cover plate 21. The cover plate 21 is configured as a cockpit floor, that is, at least a portion of the cockpit floor is used to form the cover plate 21 of the battery 10. The seat crossbeam 14 is also connected to the cover plate 21. The cover plate 21 is made of metal, and the connection method of the thermal management component 40 and the cover plate 21 includes one or more of bonding, bolting and welding, and the thermal management component 40 is bonded to at least part of the battery cell 31 by thermal conductive adhesive.

[0151] Combination Figures 3 to 5 As shown, the battery cell 31 includes a first end face and a second end face, wherein the first end face is bonded to the thermal management component 40 by a thermally conductive adhesive, and the second end face is away from the thermal management component 40 and is disposed toward the bottom plate 22 of the box body 20. A first electrode terminal 311, a second electrode terminal 312 and a pressure relief mechanism 313 are disposed on the second end face.

[0152] Combination Figure 3 and Fig.12 As shown, the thermal management component 40 includes a heat exchanger 41, a first current collector 42, and a second current collector 43. The heat exchanger 41 has a heat conduction cavity, and the first current collector 42 and the second current collector 43 respectively have a current collecting cavity, the heat conduction cavity and the current collecting cavity are connected and are both used to accommodate a heat conduction medium, and the heat exchanger 41 is thermally connected to at least part of the battery cells 31, and at the same time, the heat exchanger 41 is thermally connected to the cover plate 21. There are multiple heat exchangers 41 and they are arranged at intervals along the first direction, and the first current collector 42 and the second current collector 43 extend respectively along the first direction and are connected to multiple heat exchangers 41 along the second direction.

[0153] Combination Figure 3 , Figure 5 , Fig.14 and Fig.15As shown, the minimum thickness dimension of the heat exchange member 41 along the vertical direction is h1, and the value range of h1 is 0.2mm≤h1≤50mm. The minimum thickness dimension of the first current collector 42 along the vertical direction is h2, and the value range of h2 is 0.5mm≤h2≤50mm. The weight of the battery 10 is M, wherein 0.0002mm / Kg≤h1 / M≤5mm / Kg, 0.0005mm / Kg≤h2 / M≤10mm / Kg. The box body 20 includes a first side beam 231, and the surface of the first side beam 231 facing the cover plate 21 has a receiving groove 25, and at least part of the first current collector 42 is arranged in the receiving groove 25. The width dimension of the first current collector 42 along the second direction is h3, and the value range of h3 is 0.5mm≤h3≤100mm. The width dimension of the first side beam 231 along the second direction is h4, wherein 0.005<h3 / h4≤50.

[0154] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: include: A box body and a cover plate, wherein the box body comprises a receiving cavity and an opening connected to the receiving cavity, and the cover plate is located above the box body and covers the opening; A battery cell is placed in the accommodation cavity; The heat management component is located between the battery cell and the cover plate, and the heat management component is thermally connected to the battery cell and the cover plate.

2. The battery according to claim 1, characterized in that The cover plate is made of metal.

3. The battery according to claim 1, characterized in that The connection method between the thermal management component and the cover plate includes one or more of bonding, bolting and welding.

4. The battery according to claim 1, characterized in that The thermal management component is bonded to at least a portion of the battery cells by thermally conductive adhesive.

5. The battery according to claim 1, characterized in that The battery cell comprises a pressure relief mechanism and a first end surface facing the thermal management component, and the pressure relief mechanism is located on other end surfaces of the battery cell except the first end surface.

6. The battery according to claim 5, characterized in that The battery cell further includes a second end surface facing away from the thermal management component, and the pressure relief mechanism is located on the second end surface.

7. The battery according to any one of claims 1 to 6, characterized in that The thermal management component comprises a heat exchange member and a current collecting member, wherein the heat exchange member has a heat conduction cavity, the current collecting member has a current collecting cavity, the heat conduction cavity and the current collecting cavity are connected and are both used to accommodate a heat conduction medium. The heat exchange element is used for thermally connecting with at least part of the battery cells, and / or the heat exchange element is used for thermally connecting with the cover plate.

8. The battery according to claim 7, characterized in that The minimum thickness dimension of the heat exchange element along the vertical direction is h1, and the value range of h1 is 0.2mm≤h1≤50mm. Preferably, the value range of h1 is 2mm≤h1≤10mm.

9. The battery according to claim 8, characterized in that The weight of the battery is M, wherein 0.0002 mm / Kg≤h1 / M≤5 mm / Kg, preferably, 0.002 mm / Kg≤h1 / M≤1 mm / Kg.

10. The battery according to claim 7, characterized in that The heat exchange component is connected to the current collecting component, and the current collecting component is connected to at least one of the box body or the cover plate. The minimum thickness dimension of the current collecting component along the vertical direction is h2, and the value range of h2 is 0.5mm≤h2≤50mm. Preferably, the value range of h2 is 2mm≤h2≤20mm.

11. The battery according to claim 10, characterized in that The weight of the battery is M, wherein 0.0005 mm / Kg≤h2 / M≤10 mm / Kg, preferably, 0.002 mm / Kg≤h2 / M≤2 mm / Kg.

12. The battery according to claim 7, characterized in that The box body includes a plurality of box beams connected to the cover plate, the box beams are formed with receiving grooves, and at least a portion of the current collecting member is located in the receiving grooves.

13. The battery according to claim 12, characterized in that The box beam includes a partition beam, which is used to divide the accommodating cavity into at least two chambers. The at least two chambers include a first chamber for placing the battery cell. The surface of the partition beam facing the first chamber or the surface facing the cover plate has the accommodating groove.

14. The battery according to claim 12, characterized in that There are a plurality of heat exchange elements arranged at intervals along a first direction, the current collecting element extends along the first direction and is connected to the plurality of heat exchange elements along a second direction, and the first direction and the second direction are perpendicular to each other. The width dimension of the current collecting member along the second direction is h3, and the value range of h3 is 0.5mm≤h3≤100mm. Preferably, the value range of h3 is 3mm≤h3≤20mm.

15. The battery according to claim 14, characterized in that The box body includes a first side beam, the accommodating groove is located on the first side beam, and the width dimension of the first side beam along the second direction is h4, wherein 0.005<h3 / h4≤50, preferably, 0.03<h3 / h4≤10.

16. An electrical equipment, characterized in that: The method comprises a battery as claimed in any one of claims 1 to 15, wherein the battery is used to provide electrical energy to the electrical device.

17. The electrical equipment according to claim 16, characterized in that: The electrical equipment is a vehicle, wherein the cover plate is configured as a cabin floor of the vehicle.

18. The electrical equipment according to claim 17, characterized in that: The cover plate is connected with a seat crossbeam.

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