Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, the battery device comprises a battery monomer assembly, a plurality of busbars and a heat exchange member, each busbar is connected with two adjacent pole columns, the heat exchange member is arranged on the side surface of the battery monomer assembly in the second direction, the busbars are located on at least one side of the heat exchange member in the third direction, and the heat exchange member is connected with the busbar. The two adjacent busbars in the first direction are the first busbar and the second busbar correspondingly, a partition area is defined by the first busbar, the second busbar and the heat exchange piece, and in the partition area, the side edge of the first busbar is a bent first arc-shaped edge, and the side edge of the second busbar is a bent second arc-shaped edge. Therefore, the distance between the first busbar and the second busbar close to one side of the heat exchange piece is increased. According to the battery device provided by the invention, the risk of short circuit between the two busbars caused by condensation on the heat exchange piece can be reduced.

Description

Technical Field

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

[0002] As environmental problems become increasingly severe, people's environmental awareness gradually matures, and oil prices rise, more and more people will focus on new energy vehicles when purchasing vehicles. At present, battery devices often use cold plates to dissipate heat. When the cold plate is arranged on the side of the battery cell assembly with the pole, the condensation on the cold plate can easily cause a short circuit between the two busbars. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a battery device that can reduce the risk of condensation on a heat exchanger causing a short circuit between two busbars.

[0004] According to the first aspect of the present application, the battery device includes: a battery cell assembly, a bus and a heat exchanger, wherein the battery cell assembly includes a plurality of battery cells, the plurality of battery cells are arranged in sequence along a first direction, and a pole is provided on the side of the battery cell in a second direction; a plurality of bus bars are provided, and each bus bar connects two adjacent poles; the heat exchanger is provided on the side of the battery cell assembly in the second direction, and the bus bar is located on at least one side of the heat exchanger in the third direction, wherein two adjacent bus bars in the first direction are respectively a first bus bar and a second bus bar, and a separation area is enclosed between the first bus bar, the second bus bar and the heat exchanger, and in the separation area, the side edge of the first bus bar is a curved first arc edge to increase the distance between the first bus bar and the second bus bar on the side close to the heat exchanger.

[0005] In the above example, a separation area is set up between the first bus, the second bus and the heat exchange element. In the separation area, the side of the first bus is a curved first arc edge to increase the distance between the first bus and the second bus on the side close to the heat exchange element. Even if condensation appears on the heat exchange element, the condensation is not easy to fill the separation area, so that it is not easy for a short circuit to occur between the two adjacent bus bars, thereby effectively reducing the possible safety risks of the battery device. In addition, the curved and extended first arc edge can also make it easier for condensation to be better discharged from the bus, thereby further reducing the risk of a short circuit between the two adjacent bus bars.

[0006] In some embodiments of the present application, the side of the first bus close to the second bus is a first side, and in the direction from the bus to the heat exchange element, at least a portion of the first side is constructed as the first arc-shaped side bent in a direction away from the second bus.

[0007] In the above example, in the direction from the bus to the heat exchanger, by bending at least a portion of the first side in a direction away from the second bus, the distance between the two adjacent busses on one side of the heat exchanger can be increased. Even if condensation gathers on the heat exchanger, the condensation is not likely to short-circuit the two adjacent busses, thereby effectively reducing the possible safety risks of the battery device.

[0008] In some embodiments of the present application, a side edge of the first busbar connected to the first arcuate edge is tangent to the first arcuate edge.

[0009] In the above example, both ends of the curved and extended first arc-shaped edge are relatively smooth and are not prone to sharp corners, so that the electric field is not easily concentrated, thereby not easily causing adverse problems such as partial discharge.

[0010] In some embodiments of the present application, the first arc-shaped edge includes a first arc edge that extends in a curved shape.

[0011] In the above example, from the perspective of electrical performance optimization, the presence of the first arc edge further optimizes the electric field distribution. Compared with ordinary curved sides, the arc can guide the electric field to spread evenly in a better curve shape, better reduce the distortion and concentration of the electric field at the edge, and effectively suppress the tip discharge phenomenon caused by uneven electric field, reduce corona loss, and ensure the electrical stability of the bus and battery system, which is conducive to the efficient and stable operation of the battery device. In terms of short circuit protection, the first arc edge has better improved the ability to resist condensation. Even if a small amount of condensation is formed, the condensation can easily slide away along the arc surface, so it is not easy to accumulate on the first side and cross to the adjacent bus.

[0012] In some embodiments of the present application, the first arc edge is in the shape of a quarter arc.

[0013] In the above example, the distortion and concentration of the electric field at the edge can be further reduced, the tip discharge phenomenon caused by uneven electric field can be effectively suppressed, the corona loss is reduced, the electrical stability of the bus and the battery system is guaranteed, and it is beneficial to the efficient and stable operation of the battery device.

[0014] In some embodiments of the present application, the radius R1 of the first arc edge satisfies: 1mm≤R1≤40mm.

[0015] In the above example, by meeting the above conditions, the electric field can be flexibly adjusted according to the working conditions, which can effectively reduce the risk of tip discharge; and the distance between two adjacent bus bars on the side close to the heat exchanger is increased, thereby reducing the risk of condensation short-circuiting the two adjacent bus bars.

[0016] In some embodiments of the present application, in the third direction, the first bus is spaced apart from the heat exchange element; the end of the first arcuate edge close to the heat exchange element is the first end, and in the first direction, the distance L1 from the first end to the second bus satisfies: L1 ≥ 1 mm, and / or, the end of the first arcuate edge away from the heat exchange element is the second end, and in the third direction, the distance L2 from the second end to the heat exchange element satisfies: L2 ≥ 1 mm.

[0017] In the above example, by satisfying the above conditions, the distance between two adjacent bus bars and the distance between the first arc-shaped edge and the heat exchange element can be reasonably controlled to prevent condensation from short-circuiting the two adjacent bus bars.

[0018] In some embodiments of the present application, the first bus includes a first overlapping area that is in contact with the heat exchange element, and a portion of the first arcuate edge is located in the first overlapping area. In the third direction, the width of the first overlapping area is W1, and the end of the first arcuate edge away from the heat exchange element is the second end. The distance from the second end to the heat exchange element is L2, satisfying: L2>W1.

[0019] In the above example, by making the first bus fit against the heat exchanger, the heat exchanger can better exchange heat with the first bus, and by satisfying the above conditions, the distance between the two adjacent busbars on the side close to the heat exchanger is increased, thereby reducing the risk of condensation short-circuiting the two adjacent busbars.

[0020] In some embodiments of the present application, the width of the first overlapping area is W1 and satisfies: W1 ≥ 1 mm.

[0021] In the above example, by making the first overlapping area satisfy the above conditions, the connection between the first bus bar and the heat exchange element can be made more stable, and the heat exchange effect is also better.

[0022] In some embodiments of the present application, in the separation area, the side edge of the second bus bar is a curved second arc-shaped edge to increase the distance between the first bus bar and the second bus bar on the side close to the heat exchange element.

[0023] In the above example, in the separation area, the side of the first bus is a curved first arc-shaped side, and the side of the second bus is also a curved second arc-shaped side, so as to increase the distance between the first bus and the second bus on the side close to the heat exchanger. Even if condensation occurs on the heat exchanger, the condensation is not easy to fill the separation area, so that it is not easy for the two adjacent bus bars to short-circuit, thereby better reducing the possible safety risks of the battery device. In addition, the curved and extended first arc-shaped side and the second arc-shaped side can also make it easier for condensation to be better discharged from the bus, thereby further reducing the risk of short-circuiting between the two adjacent bus bars.

[0024] In some embodiments of the present application, the side of the second bus close to the first bus is a second side, and in the direction from the bus to the heat exchange element, at least a portion of the second side is constructed as a second arc-shaped side bent in a direction away from the first bus.

[0025] In the above example, in the direction from the bus to the heat exchanger, by bending at least a portion of the first side in a direction away from the second bus, and bending at least a portion of the second side in a direction away from the first bus, the distance between the two adjacent busses on one side of the heat exchanger can be increased. Even if condensation gathers on the heat exchanger, the condensation is not likely to short-circuit the two adjacent busses, thereby effectively reducing the possible safety risks of the battery device.

[0026] In some embodiments of the present application, a side edge of the second busbar connected to the second arc-shaped edge is tangent to the second arc-shaped edge.

[0027] In the above example, both ends of the first curved and extended arc side and both ends of the second curved and extended arc side are relatively smooth and are not prone to sharp corners, so that the electric field is not easily concentrated, thereby not easily causing adverse problems such as partial discharge.

[0028] In some embodiments of the present application, the first side includes a first arc side that is bent and extended, and the second side includes a second arc side that is bent and extended.

[0029] In the above example, from the perspective of electrical performance optimization, the first arc edge and the second arc edge can further optimize the electric field distribution. Compared with ordinary curved sides, the arc can guide the electric field to spread evenly in a better curve shape, better reduce the distortion and concentration of the electric field at the edge, effectively suppress the tip discharge phenomenon caused by uneven electric field, reduce corona loss, ensure the electrical stability of the bus and battery system, and facilitate efficient and stable operation of the battery device. In terms of short circuit protection, the first arc edge and the second arc edge have better improved the ability to resist condensation. Even if a small amount of condensation is formed, the condensation can easily slide away along the arc surface, so it is not easy to accumulate on the first side and cross to the adjacent bus.

[0030] In some embodiments of the present application, the first arc edge is a quarter circle, and / or the second arc edge is a quarter circle.

[0031] In the above example, the distortion and concentration of the electric field at the edge can be further reduced, the tip discharge phenomenon caused by uneven electric field can be effectively suppressed, the corona loss is reduced, the electrical stability of the bus and the battery system is guaranteed, and it is beneficial to the efficient and stable operation of the battery device.

[0032] In some embodiments of the present application, the radius R1 of the first arc edge satisfies: 1mm≤R1≤40mm; the radius R2 of the second arc edge satisfies: 1mm≤R2≤40mm.

[0033] In the above example, by meeting the above conditions, the electric field can be flexibly adjusted according to the working conditions, which can effectively reduce the risk of tip discharge; and the distance between two adjacent bus bars on the side close to the heat exchanger is increased, thereby reducing the risk of condensation short-circuiting the two adjacent bus bars.

[0034] In some embodiments of the present application, in the third direction, the first bus is spaced apart from the heat exchange element, and the second bus is spaced apart from the heat exchange element; the end of the first arcuate edge close to the heat exchange element is the first end, and the end of the second arcuate edge close to the heat exchange element is the third end. In the first direction, the distance from the first end to the third end is L3, which satisfies: L3 ≥ 1 mm, and / or, the end of the first arcuate edge away from the heat exchange element is the second end, and the end of the second arcuate edge away from the heat exchange element is the fourth end. In the third direction, the distance L2 from the second end to the heat exchange element satisfies: L2 ≥ 1 mm, and the distance L4 from the fourth end to the heat exchange element satisfies: L4 ≥ 1 mm.

[0035] In the above example, by satisfying the above conditions, the distance between two adjacent bus bars, the distance between the first arcuate edge and the heat exchanger, and the distance between the second arcuate edge and the heat exchanger can be controlled more reasonably, so that condensation is not likely to short-circuit the two adjacent bus bars.

[0036] In some embodiments of the present application, the first bus includes a first overlapping area that fits the heat exchanger, and part of the first arcuate edge is located in the first overlapping area. In the third direction, the width of the first overlapping area is W1, and the end of the first arcuate edge away from the heat exchanger is the second end, and the distance from the second end to the heat exchanger is L2, satisfying: L2>W1; the second bus includes a second overlapping area that fits the heat exchanger, and part of the second arcuate edge is located in the second overlapping area. In the third direction, the width of the second overlapping area is W2, and the end of the second arcuate edge away from the heat exchanger is the fourth end, and the distance from the fourth end to the heat exchanger is L4, satisfying: L4>W2.

[0037] In the above example, by making the first bus fit against the heat exchanger, the heat exchanger can better exchange heat with the first bus, and by making the second bus fit against the heat exchanger, the heat exchanger can better exchange heat with the second bus. In addition, by satisfying the above conditions, the distance between two adjacent busses on the side close to the heat exchanger is increased, thereby reducing the risk of condensation short-circuiting the two adjacent busses.

[0038] In some embodiments of the present application, the width of the first overlapping area is W1 and satisfies: W1 ≥ 1 mm; the width of the second overlapping area is W2 and satisfies: W2 ≥ 1 mm.

[0039] In the above example, by making the first overlapping area and the second overlapping area satisfy the above conditions, the connection between the first bus bar, the second bus bar and the heat exchange element can be made more stable, and the heat exchange effect is also better.

[0040] In some embodiments of the present application, the bus is L-shaped, including a first portion extending along a first direction and a second portion extending along a third direction, the second portion is connected to a side of the first portion close to the heat exchange element, and at least a portion of the second portion overlaps with the heat exchange element, and the first arc-shaped edge is located in the first portion.

[0041] In the above example, by making the busbar into an L-shaped structure, the distance between the first parts of the two busbars on the side close to the heat exchanger can be increased, so that the two adjacent busbars are not easily short-circuited due to condensation, and can also be better connected to the heat exchanger, which can better maintain the appropriate temperature of the battery and improve the battery life and performance. Mechanical stability is enhanced.

[0042] In some embodiments of the present application, within a projection plane perpendicular to the second direction, a projection plane of the busbar includes a semicircular area.

[0043] In the above example, the semicircular projection can better disperse the electric field with its smooth contour, reduce the risk of tip discharge, and effectively ensure the safety of the electrical system.

[0044] In some embodiments of the present application, the heat exchange element includes a heat exchange plate or a heat exchange tube.

[0045] In the above examples, the heat exchange plate or heat exchange tube has a simple structure, good heat exchange effect, and is simple and convenient to assemble.

[0046] The present application also provides an electrical device.

[0047] According to the electrical device of the second aspect of the present application, the electrical device may include a battery device, and the battery device is used to store or provide electrical energy.

[0048] In the above example, by providing the battery device of the above example, the electrical device of the present application can have higher reliability and good safety.

[0049] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0051] Figure 1 A schematic diagram of the structure of a vehicle is provided as an electrical device according to one embodiment of the present application.

[0052] Figure 2 A schematic structural diagram of a battery cell assembly, a bus bar and a heat exchange component provided for one embodiment of the present application.

[0053] Figure 3 A schematic structural diagram of a battery cell assembly, a bus bar and a heat exchange component provided for one embodiment of the present application.

[0054] Figure 4 for Figure 3 Magnified view of area A.

[0055] Figure 5 A schematic structural diagram of a battery cell assembly, a bus bar and a heat exchange component provided for one embodiment of the present application.

[0056] Figure 6 for Figure 5 Magnified view of area B.

[0057] Figure 7 A schematic structural diagram of a battery cell assembly, a bus bar and a heat exchange component provided for one embodiment of the present application.

[0058] Reference numerals:

[0059] 1000, vehicle; 100, battery device; 200, controller; 300, motor;

[0060] 1. Battery cell assembly; 11. Battery cell; 111. Terminal column;

[0061] 2. busbar; 21. first busbar; 211. first arc-shaped edge; 22. second busbar; 221. second arc-shaped edge; 23. first part; 24. second part;

[0062] 3. Heat exchange parts;

[0063] X, first direction; Y, third direction; Z, second direction. DETAILED DESCRIPTION

[0064] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0066] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship 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.

[0067] Reference to "embodiments" herein 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 herein may be combined with other embodiments.

[0068] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may 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 article generally indicates that the associated objects before and after are in an "or" relationship.

[0069] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0070] 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", "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. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0071] 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 connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0072] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include one or more battery cells. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar component.

[0073] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, a battery cell assembly may be a battery module, and a battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, a battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0074] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0075] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0076] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0077] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0078] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0079] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0080] In some embodiments, the battery device refers to an energy storage device, which includes a box body, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0081] The battery cells mentioned in the embodiments of the present application may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., and the embodiments of the present application are not limited to this.

[0082] Exemplarily, a battery cell may generally include a shell, a battery cell assembly and an electrolyte, wherein the shell is used to contain the battery cell assembly and the electrolyte, and the shell is provided with at least one positive electrode column and at least one negative electrode column. The battery cell assembly includes one or more electrode assemblies, and the electrode assembly is formed by stacking or winding a positive electrode sheet, a negative electrode sheet and a separator.

[0083] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0084] As environmental problems become increasingly serious, people's environmental awareness gradually matures, and oil prices rise, more and more people will focus on new energy vehicles when purchasing vehicles. At present, battery devices often use cold plates to dissipate heat. When the cold plate is arranged on the side of the battery cell assembly with the pole, the cold plate is often insulated. However, when condensation appears on the cold plate, it is easy to cause a short circuit between two adjacent busbars.

[0085] Based on the above considerations, in order to reduce the possibility of condensation on the cold plate causing a short circuit between the two bus bars, the applicant has designed a battery device after in-depth research, in which a separation area is set up between the first bus bar, the second bus bar and the heat exchange element. In the separation area, the side of the first bus bar is a curved first arc edge to increase the distance between the first bus bar and the second bus bar on the side close to the heat exchange element. Even if condensation appears on the heat exchange element, the condensation is not easy to fill the separation area, so that it is not easy for a short circuit to occur between the two adjacent bus bars, thereby effectively reducing the possible safety risks of the battery device. In addition, the curved and extended first arc edge can also make it easier for the condensation to be better discharged from the bus bar, thereby further reducing the risk of a short circuit between the two adjacent bus bars.

[0086] The embodiment of the present application provides an electric device using the battery device 100 of the present disclosure as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0087] For the convenience of description, the following embodiments take the electric device as a vehicle 1000 as an example to introduce the structures of the electric device, the battery device 100 and the battery cell 11 of the present application in detail.

[0088] Please refer to Figure 1 , Figure 1The power device provided for one embodiment of the present application is a schematic diagram of the structure of a vehicle 1000. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The vehicle 1000 is provided with a battery device 100, and the battery device 100 can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for powering the vehicle 1000, for example, the battery device 100 can be used as an operating power supply for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for the starting, navigation and driving power requirements of the vehicle 1000. In some embodiments of the present application, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also as the driving power supply of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0089] Reference below Figure 2-Figure 7 A battery device 100 according to an embodiment of the first aspect of the present application is described.

[0090] Please refer to Figure 2 , Figure 2 A schematic structural diagram of a battery cell assembly 1, a bus bar 2 and a heat exchange component 3 provided in one embodiment of the present application.

[0091] Please refer to Figure 3 , Figure 3 A schematic structural diagram of a battery cell assembly 1, a bus bar 2 and a heat exchange component 3 provided in one embodiment of the present application.

[0092] Please refer to Figure 4 , Figure 4 for Figure 3 Magnified view of area A.

[0093] The present application embodiment provides a battery device 100, such as Figure 2 and Figure 3As shown, the battery device 100 includes a battery cell assembly 1, a bus 2 and a heat exchanger 3. The battery cell assembly 1 includes a plurality of battery cells 11, which are arranged in sequence along a first direction X. A pole 111 is provided on the side of the battery cell 11 in a second direction Z. A plurality of bus bars 2 are provided, and each bus bar 2 connects two adjacent poles 111. The heat exchanger 3 is provided on the side of the battery cell assembly 1 in the second direction Z. The bus bar 2 is located on at least one side of the heat exchanger 3 in a third direction Y, wherein two adjacent bus bars 2 in the first direction X are respectively a first bus bar 21 and a second bus bar 22, and a separation area is enclosed between the first bus bar 21, the second bus bar 22 and the heat exchanger 3. In the separation area, the side edge of the first bus bar 21 is a curved first arc edge 211 to increase the distance between the first bus bar 21 and the second bus bar 22 on the side close to the heat exchanger 3.

[0094] That is to say, the heat exchanger 3 is arranged on the side of the battery cell assembly 1 in the second direction Z. The heat exchanger 3 can perform heat exchange with the battery cell assembly 1, such as cooling. When the battery cell assembly 1 is running, it is easy to generate heat, and the heat exchanger 3 with cooling capacity can reduce the temperature of the battery cell assembly 1, thereby ensuring the safety of the battery cell assembly 1, and can also make the battery cell assembly 1 at a more suitable operating temperature, which can improve the operating efficiency of the battery cell assembly 1. The heat exchanger 3 can also generate heat. For example, under the cold start condition of the vehicle 1000, by heating the battery cell assembly 1, the battery cell assembly 1 can have a better initial operating temperature in a relatively cold environment, thereby better improving the operating effect of the battery cell 11.

[0095] Exemplarily, the second direction Z may be an up-down direction, and the side surface of the second direction Z may be an upper side surface or a lower side surface, which is not limited in the present application.

[0096] Condensation is likely to form on the heat exchanger 3 mentioned above during cooling, and the heat exchanger 3 is located on the side of the battery cell assembly 1 having the pole 111. When the bus 2 is electrically connected to the two adjacent poles 111, the distance between the bus 2 and the heat exchanger 3 is likely to be close. Specifically, a separation area is enclosed between the first bus 21, the second bus 22 and the heat exchanger 3. When condensation is generated on the heat exchanger 3, it can overflow into the separation area. In the separation area, the condensation is likely to cause a short circuit between the two adjacent bus bars 2. In the present application, in the separation area, the side edge of the first bus 21 is a curved first arc edge 211 to increase the distance between the first bus 21 and the second bus 22 on the side close to the heat exchanger 3. Even if condensation appears on the heat exchanger 3, the condensation is not likely to fill the separation area, thereby preventing a short circuit between the two adjacent bus bars 2.

[0097] Secondly, when condensation is generated on the heat exchange element 3 , the first arc-shaped edge 211 can also make it easier for the condensation to be discharged away from the busbar 2 , thereby further reducing the risk of short circuit between two adjacent busbars 2 .

[0098] In the above example, in the separation area, the side of the first bus 21 is a curved first arc-shaped edge 211 to increase the distance between the first bus 21 and the second bus 22 on the side close to the heat exchanger 3. Even if condensation occurs on the heat exchanger 3, the condensation is not easy to fill the separation area, so that it is not easy for the two adjacent bus bars 2 to short-circuit, thereby effectively reducing the possible safety risks of the battery device 100. In addition, the curved and extended first arc-shaped edge 211 can also make it easier for condensation to be better discharged from the bus 2, thereby further reducing the risk of short-circuiting between the two adjacent bus bars 2.

[0099] In some embodiments of the present application, the side of the first bus 21 close to the second bus 22 is the first side, and in the direction from the bus 2 to the heat exchange element 3, at least part of the first side is constructed as a first arc-shaped edge 211 bent in the direction away from the second bus 22.

[0100] That is to say, within the curved section of the first arc-shaped edge 211, the gap between the first bus 21 and the second bus 22 becomes larger as it is closer to the heat exchanger 3. Even if condensation occurs on the heat exchanger 3, it is not easy for the condensation to fill the gap, thereby making it difficult for a short circuit to occur between two adjacent bus bars 2.

[0101] It can be understood that, in the direction from the bus 2 to the heat exchanger 3, part of the first side can be bent in the direction away from the second bus 22. Exemplarily, the first side includes a bent section. In the direction from the bus 2 to the heat exchanger 3, the first side can be divided into a first section, a second section and a third section connected in sequence. The bent section can be located in the first section, the second section or the third section. Exemplarily, in the direction from the bus 2 to the heat exchanger 3, the first side can be divided into a first section and a second section connected in sequence. The bent end can be located in the first section or the second end. The above examples are only examples to facilitate the exemplary explanation of "part of the first side bending in the direction away from the second bus 22", and are not limitations of the present application. That is, as long as the distance between two adjacent bus bars 2 on the side of the heat exchanger 3 can be increased, the bending arrangement of the first side can be incorporated into the logic of the technical solution of the present application.

[0102] In addition, for the above technical solution of the present application, in the direction from the bus 2 to the heat exchanger 3, the entire first side may be bent in a direction away from the second bus 22, and the present application does not impose any limitation on this.

[0103] In the above example, in the direction from the bus 2 to the heat exchanger 3, by bending at least a portion of the first side in a direction away from the second bus 22, the distance between the two adjacent bus bars 2 on the side of the heat exchanger 3 can be increased. Even if condensation gathers on the heat exchanger 3, the condensation is not likely to short-circuit the two adjacent bus bars 2, thereby effectively reducing the possible safety risks of the battery device 100.

[0104] In some embodiments of the present application, the side edge of the first bus bar 21 connected to the first arc-shaped edge 211 is tangent to the first arc-shaped edge 211 .

[0105] That is to say, compared with making the first side have a hypotenuse, the sharp angles at both ends of the hypotenuse are prone to cause adverse problems such as local discharge. In the present application, at least a portion of the first side is constructed as a curved and extended arc-shaped edge, and the side of the first bus 21 connected to the first arc-shaped edge 211 is tangent to the first arc-shaped edge 211. When the bus 2 is electrically connected to two adjacent poles 111, the first arc-shaped edge 211 can disperse the electric field more evenly, and the two ends of the arc-shaped edge can transition more smoothly, so that the electric field is not easy to concentrate, and thus it is not easy to cause adverse problems such as local discharge.

[0106] In the above example, the two ends of the curved and extended first arc-shaped edge 211 are relatively smooth and are not prone to sharp corners, so that the electric field is not easily concentrated, thereby not easily causing adverse problems such as partial discharge.

[0107] In some embodiments of the present application, the first side edge includes a first arc edge that extends in a curved manner.

[0108] In the above example, from the perspective of electrical performance optimization, the presence of the first arc edge further optimizes the electric field distribution. Compared with ordinary curved sides, the arc can guide the electric field to spread evenly in a better curve shape, better reduce the distortion and concentration of the electric field at the edge, effectively suppress the tip discharge phenomenon caused by uneven electric field, reduce corona loss, ensure the electrical stability of bus 2 and the battery system, and facilitate the efficient and stable operation of the battery device 100. In terms of short circuit prevention, the first arc edge has better improved the ability to resist condensation. Even if a small amount of condensation is formed, the condensation can easily slide away along the arc surface, so it is not easy to accumulate on the first side and cross to the adjacent bus 2.

[0109] In some embodiments of the present application, the first arc side is in the shape of a quarter arc.

[0110] Exemplarily, the side edge of the first busbar 21 close to the heat exchange element 3 is tangent to the first arc edge, and the first side edge includes the first arc edge and a first straight edge tangent to the first arc edge.

[0111] In the above example, the distortion and concentration of the electric field at the edge can be further reduced, the tip discharge phenomenon caused by the uneven electric field can be effectively suppressed, the corona loss is reduced, the electrical stability of the bus 2 and the battery system is guaranteed, and the battery device 100 is conducive to efficient and stable operation.

[0112] In some embodiments of the present application, the radius R1 of the first arc edge satisfies: 1mm≤R1≤40mm.

[0113] Exemplarily, the radius R1 of the first arc edge may be 5 mm, 10 mm, 15 mm, 20 mm, 22 mm, 25 mm, 30 mm, 32 mm, 35 mm, or 38 mm.

[0114] In the above example, by satisfying the above conditions, the electric field can be flexibly adjusted according to the working conditions, which can effectively reduce the risk of tip discharge; and the distance between the two adjacent bus bars 2 on the side close to the heat exchange element 3 is increased, thereby reducing the risk of condensation short-circuiting the two adjacent bus bars 2.

[0115] In some embodiments of the present application, Figure 2-Figure 4 As shown, in the third direction Y, the first bus 21 is separated from the heat exchanger 3; the end of the first arc edge close to the heat exchanger 3 is the first end, and in the first direction X, the distance L1 from the first end to the second bus 22 satisfies: L1 ≥ 1 mm, and / or, the end of the first arc edge 211 away from the heat exchanger 3 is the second end, and in the third direction Y, the distance L2 from the second end to the heat exchanger 3 satisfies: L2 ≥ 1 mm.

[0116] That is to say, on the one hand, by controlling the distance L1 from the first end to the second bus 22, that is, controlling the maximum distance between the first bus 21 and the second bus 22, condensation can be prevented from short-circuiting the two adjacent bus bars 2. On the other hand, by controlling the distance L2 from the second end to the heat exchange element 3, condensation can be prevented from short-circuiting the two adjacent bus bars 2.

[0117] Illustratively, the distance L1 from the first end to the second bus bar 22 may be 1 mm, 3 mm, 6 mm, 8 mm, 10 mm, 13 mm, etc., which is not limited in the present application.

[0118] Exemplarily, the distance L2 from the second end to the heat exchange element 3 may be 1 mm, 3 mm, 6 mm, 8 mm, 10 mm, 13 mm, etc., which is not limited in the present application.

[0119] In addition, the distance L1 from the first end to the second bus bar 22 can also be adjusted according to the voltage of the battery cell 11 .

[0120] Exemplarily, the voltage of the battery cell 11 is 800V, and L1 satisfies: L1 ≥ 12.8 mm.

[0121] Exemplarily, the voltage of the battery cell 11 is 32V to 40V, and L1 satisfies: L1 ≥ 1.8 mm.

[0122] Exemplarily, the voltage of the battery cell 11 is less than 10V, and L1 satisfies: L1 ≥ 1.0 mm.

[0123] As can be seen from the above example, the distance from the first end to the second busbar 22 can be flexibly selected according to the actual voltage of the battery cell 11. When the above conditions are met, condensation is unlikely to short-circuit two adjacent busbars 2.

[0124] In the above example, by satisfying the above conditions, the distance between two adjacent bus bars 2 and the distance between the first arc-shaped edge 211 and the heat exchanger 3 can be reasonably controlled to prevent condensation from short-circuiting the two adjacent bus bars 2 .

[0125] In some embodiments of the present application, the first bus 21 includes a first overlapping area that is in contact with the heat exchanger 3, and a portion of the first arc edge 211 is located in the first overlapping area. In the third direction Y, the width of the first overlapping area is W1, and the end of the first arc edge away from the heat exchanger 3 is the second end. The distance from the second end to the heat exchanger 3 is L2, satisfying: L2>W1.

[0126] That is to say, by constructing the first arc-shaped edge 211 on the first side, the gap between the first bus 21 and the second bus 22 on the side of the heat exchanger 3 can be increased, and part of the first arc-shaped edge 211 is located in the first overlapping area. On the one hand, the heat exchanger 3 can better exchange heat with the bus 2, which is conducive to keeping the battery cell 11 in a better operating temperature range. On the other hand, it can also better prevent condensation from short-circuiting the two adjacent busbars 2. That is, compared with the bus 2 without the first arc-shaped edge 211, the distance between the two adjacent busbars 2 is closer. Therefore, no matter how much the bending radius of the first arc-shaped edge 211 is and how much the first arc-shaped edge 211 is located in the first overlapping area, as long as part of the first arc-shaped edge 211 is located outside the first overlapping area, in principle, the distance between the two adjacent busbars 2 on the side close to the heat exchanger 3 is increased, which can reduce the risk of condensation short-circuiting the two adjacent busbars 2.

[0127] In the above example, by making the first bus 21 fit closely with the heat exchange element 3, the heat exchange element 3 can better exchange heat with the first bus 21, and by satisfying the above conditions, the distance between the two adjacent bus bars 2 on the side close to the heat exchange element 3 is increased, thereby reducing the risk of condensation short-circuiting the two adjacent bus bars 2.

[0128] In some embodiments of the present application, the width of the first overlapping area is W1 and satisfies: W1 ≥ 1 mm.

[0129] That is to say, when the first overlapping area satisfies the above conditions, there can be a relatively sufficient contact area between the first bus 21 and the heat exchanger 3. In this way, when the first bus 21 and the heat exchanger 3 exchange heat, there can be a better heat exchange cross-section, which is beneficial to the heat exchange between the first bus 21 and the heat exchanger 3. In addition, the fitted first bus 21 and the heat exchanger 3 can also better transmit the force. When the battery device 100 shakes, the first bus 21 and the heat exchanger 3 can be relatively stable and not easily damaged, thereby also better ensuring the heat exchange effect between the first bus 21 and the heat exchanger 3.

[0130] Illustratively, the width W1 of the first overlapping area may be 1 mm, 5 mm, 10 mm, 20 mm, etc., and this application does not impose any limitation thereto.

[0131] In the above example, by making the first overlapping area satisfy the above conditions, the connection between the first bus bar 21 and the heat exchange element 3 can be made more stable, and the heat exchange effect is also better.

[0132] Please refer to Figure 5 and Figure 6 , Figure 5 A schematic structural diagram of a battery cell assembly 1, a bus bar 2 and a heat exchange component 3 provided in one embodiment of the present application. Figure 6 for Figure 5 Magnified view of area B.

[0133] In some embodiments of the present application, Figure 5 and Figure 6 As shown, in the separation area, the side edge of the second bus bar 22 is a curved second arc-shaped edge 221 to increase the distance between the first bus bar 21 and the second bus bar 22 on the side close to the heat exchange element 3 .

[0134] That is, in the separation area, the side of the first busbar 21 is a curved first arc-shaped edge 211, so as to increase the distance between the first busbar 21 and the second busbar 22 on the side close to the heat exchanger 3. Even if condensation occurs on the heat exchanger 3, the condensation is not easy to fill the separation area, so that it is not easy to short-circuit between the two adjacent busbars 2. And further, the side of the second busbar 22 is also a curved second arc-shaped edge 221, so as to further increase the distance between the first busbar 21 and the second busbar 22 on the side close to the heat exchanger 3. Even if condensation gathers on the heat exchanger 3, it is not easy for the condensation to short-circuit the two adjacent busbars 2, so as to further reduce the possible safety risks of the battery device 100.

[0135] Furthermore, the curved and extended first arc-shaped edge 211 and the second arc-shaped edge 221 can also make it easier for condensation to be discharged from the busbar 2 , thereby further reducing the risk of short circuit between two adjacent busbars 2 .

[0136] In the above example, in the separation area, the side of the first bus 21 is a curved first arc-shaped edge 211, and the side of the second bus 22 is also a curved second arc-shaped edge 221, so as to increase the distance between the first bus 21 and the second bus 22 on the side close to the heat exchanger 3. Even if condensation occurs on the heat exchanger 3, the condensation is not easy to fill the separation area, so that it is not easy for the two adjacent bus bars 2 to short-circuit, thereby better reducing the possible safety risks of the battery device 100. In addition, the curved and extended first arc-shaped edge 211 and the second arc-shaped edge 221 can also make it easier for condensation to be better discharged from the bus 2, thereby further reducing the risk of short-circuiting between the two adjacent bus bars 2.

[0137] In some embodiments of the present application, Figure 5 and Figure 6 As shown, the side of the second bus 22 close to the first bus 21 is the second side, and in the direction from the bus 2 to the heat exchange element 3, at least part of the second side is constructed as a second arc-shaped edge 221 bent in the direction away from the first bus 21.

[0138] It can be understood that, in the direction from the bus 2 to the heat exchanger 3, part of the second side can be bent in the direction away from the first bus 21. Exemplarily, the second side includes a bent section. In the direction from the bus 2 to the heat exchanger 3, the second side can be divided into a first section, a second section and a third section connected in sequence. The bent section can be located in the first section, the second section or the third section. Exemplarily, in the direction from the bus 2 to the heat exchanger 3, the second side can be divided into a first section and a second section connected in sequence. The bent end can be located in the first section or the second end. The above examples are only examples to facilitate the exemplary explanation of "part of the second side is bent in the direction away from the first bus 21", and are not limitations of the present application. That is, as long as the distance between two adjacent bus bars 2 on the side of the heat exchanger 3 can be increased, the bending arrangement of the second side can be incorporated into the logic of the technical solution of the present application.

[0139] In addition, for the above technical solution of the present application, in the direction from the bus 2 to the heat exchanger 3, the entire second side may be bent in a direction away from the first bus 21, and the present application does not impose any limitation on this.

[0140] Exemplarily, a bus 2 has arcuate edges on both sides of the first direction, namely, a first arcuate edge 211 and a second arcuate edge 221, respectively. It should be noted that the first bus 21 and the second bus 22 in the above example and the following example of the present application are only settings for any two busses 2 among the multiple busses 2 for the convenience of description, and are not a special limitation on the present application. For example, there are three busses 2, and the middle bus 2 has arcuate edges on both sides of the first direction. The two arcuate edges on both sides of the middle bus 2 relative to the two busses 2 on both sides can be relatively used as the first arcuate edges 211, or the three busses 2 are respectively a first bus, a second bus and a third bus, and the second bus is between the first bus and the third bus. Here, the first bus can have a first arcuate edge 211 on the side close to the second bus, and the second bus can have a first arcuate edge 211 on the side close to the third bus.

[0141] In the above example, in the direction from the bus 2 to the heat exchanger 3, by bending at least a portion of the first side edge in a direction away from the second bus 22, and bending at least a portion of the second side edge in a direction away from the first bus 21, the distance between the two adjacent bus bars 2 on the side of the heat exchanger 3 can be increased. Even if condensation gathers on the heat exchanger 3, the condensation is not likely to short-circuit the two adjacent bus bars 2, thereby effectively reducing the possible safety risks of the battery device 100.

[0142] In some embodiments of the present application, Figure 5 and Figure 6 As shown, the side edge of the second busbar 22 connected to the second arc-shaped edge 221 is tangent to the second arc-shaped edge 221 .

[0143] That is to say, compared with making the first side have a hypotenuse, and the sharp angles at both ends of the hypotenuse are prone to cause adverse problems such as partial discharge, the present application makes at least a portion of the first side be constructed as a curved and extended arc-shaped edge, and the side of the second bus 22 connected to the second arc-shaped edge 221 is tangent to the second arc-shaped edge 221. When the bus 2 electrically connects two adjacent poles 111, the second arc-shaped edge 221 can disperse the electric field more evenly, and the two ends of the second arc-shaped edge 221 can transition more smoothly, so that the electric field is not easy to concentrate, and thus it is not easy to cause adverse problems such as partial discharge.

[0144] Secondly, when condensation is generated on the heat exchange element 3 , the second arc-shaped edge 221 can also make it easier for the condensation to be discharged away from the busbar 2 area, thereby further reducing the risk of short circuit between two adjacent busbars 2 .

[0145] In the above example, both ends of the curved and extended first arc-shaped edge 211 and both ends of the curved and extended second arc-shaped edge 221 are relatively smooth and are not prone to sharp corners, so that the electric field is not easily concentrated, thereby not easily causing adverse problems such as partial discharge.

[0146] In some embodiments of the present application, the first arc-shaped edge 211 includes a first arc-shaped edge that is bent and extended, and the second arc-shaped edge 221 includes a second arc-shaped edge that is bent and extended.

[0147] In the above example, from the perspective of electrical performance optimization, the first arc edge and the second arc edge can further optimize the electric field distribution. Compared with ordinary curved sides, the arc can guide the electric field to be evenly distributed in a better curve shape, better reduce the distortion and concentration of the electric field at the edge, and effectively suppress the tip discharge phenomenon caused by uneven electric field, reduce corona loss, and ensure the electrical stability of the bus 2 and the battery system, which is conducive to the efficient and stable operation of the battery device 100. In terms of short circuit protection, the first arc edge and the second arc edge have better improved the ability to resist condensation. Even if a small amount of condensation is formed, the condensation can easily slide away along the arc surface, so it is not easy to accumulate on the first side and cross to the adjacent bus 2.

[0148] In some embodiments of the present application, Figure 5 and Figure 6 As shown, the first arc side is a quarter circle, and / or the second arc side is a quarter circle.

[0149] Exemplarily, the side edge of the first busbar 21 close to the heat exchange element 3 is tangent to the first arc edge, and the first side edge includes the first arc edge and a first straight edge tangent to the first arc edge.

[0150] Exemplarily, the side of the second busbar 22 close to the heat exchange element 3 is tangent to the second arc side, and the second side includes the second arc side and a second straight side tangent to the second arc side.

[0151] In the above example, the distortion and concentration of the electric field at the edge can be further reduced, the tip discharge phenomenon caused by the uneven electric field can be effectively suppressed, the corona loss is reduced, the electrical stability of the bus 2 and the battery system is guaranteed, and the battery device 100 is conducive to efficient and stable operation.

[0152] In some embodiments of the present application, the radius R1 of the first arc edge satisfies: 1mm≤R1≤40mm; the radius R2 of the second arc edge satisfies: 1mm≤R2≤40mm.

[0153] Exemplarily, the radius R1 of the first arc edge may be 5 mm, 10 mm, 15 mm, 20 mm, 22 mm, 25 mm, 30 mm, 32 mm, 35 mm, or 38 mm.

[0154] Exemplarily, the radius R2 of the second arc edge may be 5 mm, 10 mm, 15 mm, 20 mm, 22 mm, 25 mm, 30 mm, 32 mm, 35 mm, or 38 mm.

[0155] In the above example, by satisfying the above conditions, the electric field can be flexibly adjusted according to the working conditions, which can effectively reduce the risk of tip discharge; and the distance between the two adjacent bus bars 2 on the side close to the heat exchange element 3 is increased, thereby reducing the risk of condensation short-circuiting the two adjacent bus bars 2.

[0156] In some embodiments of the present application, Figure 5 and Figure 6 As shown, in the third direction Y, the first bus 21 is separated from the heat exchanger 3, and the second bus 22 is separated from the heat exchanger 3; the end of the first arcuate edge 211 close to the heat exchanger 3 is the first end, and the end of the second arcuate edge 221 close to the heat exchanger 3 is the third end. In the first direction X, the distance from the first end to the third end is L3, which satisfies: L3 ≥ 1 mm, and / or, the end of the first arcuate edge 211 away from the heat exchanger 3 is the second end, and the end of the second arcuate edge 221 away from the heat exchanger 3 is the fourth end. In the third direction Y, the distance L2 from the second end to the heat exchanger 3 satisfies: L2 ≥ 1 mm, and the distance L4 from the fourth end to the heat exchanger 3 satisfies: L4 ≥ 1 mm.

[0157] That is to say, on the one hand, by controlling the distance from the first end to the third end to L3, that is, controlling the maximum distance between the first bus 21 and the second bus 22, it is possible to prevent condensation from short-circuiting the two adjacent bus bars 2. On the other hand, by controlling the distance L2 from the second end to the heat exchange element 3 and the distance L4 from the fourth end to the heat exchange element 3, it is possible to prevent condensation from short-circuiting the two adjacent bus bars 2.

[0158] Exemplarily, the distance L3 from the first end to the third end may be 1 mm, 3 mm, 6 mm, 8 mm, 10 mm, 13 mm, etc., and this application does not impose any limitation thereto.

[0159] Exemplarily, the distance L2 from the second end to the heat exchange element 3 may be 1 mm, 3 mm, 6 mm, 8 mm, 10 mm, 13 mm, etc., which is not limited in the present application.

[0160] Illustratively, the distance L2 from the fourth end to the heat exchange element 3 may be 1 mm, 3 mm, 6 mm, 8 mm, 10 mm, 13 mm, etc., which is not limited in the present application.

[0161] In addition, the distance L3 from the first end to the third end may also be adjusted according to the voltage of the battery cell 11 .

[0162] Exemplarily, the voltage of the battery cell 11 is 800V, and L3 satisfies: L3 ≥ 12.8 mm.

[0163] Exemplarily, the voltage of the battery cell 11 is 32V to 40V, and L3 satisfies: L3 ≥ 1.8 mm.

[0164] Exemplarily, the voltage of the battery cell 11 is less than 10V, and L3 satisfies: L3 ≥ 1.0 mm.

[0165] Exemplarily, the voltage of the battery cell 11 is 800V, and L2 satisfies: L2 ≥ 12.8 mm.

[0166] Exemplarily, the voltage of the battery cell 11 is 32V to 40V, and L2 satisfies: L2 ≥ 1.8 mm.

[0167] Exemplarily, the voltage of the battery cell 11 is less than 10V, and L2 satisfies: L2 ≥ 1.0 mm.

[0168] Exemplarily, the voltage of the battery cell 11 is 800V, and L4 satisfies: L4 ≥ 12.8 mm.

[0169] Exemplarily, the voltage of the battery cell 11 is 32V to 40V, and L4 satisfies: L4 ≥ 1.8 mm.

[0170] Exemplarily, the voltage of the battery cell 11 is less than 10V, and L4 satisfies: L4 ≥ 1.0 mm.

[0171] As can be seen from the above example, the distance from the first end to the third end can be flexibly selected according to the actual voltage of the battery cell 11. When the above conditions are met, condensation is unlikely to short-circuit two adjacent busbars 2.

[0172] In the above example, by satisfying the above conditions, the distance between two adjacent bus bars 2, as well as the distance between the first arcuate edge 211 and the heat exchanger 3, and the distance between the second arcuate edge 221 and the heat exchanger 3 can be controlled more reasonably, so that condensation is not likely to short-circuit the two adjacent bus bars 2.

[0173] In some embodiments of the present application, the first bus 21 includes a first overlapping area that is in contact with the heat exchanger 3, and a portion of the first arcuate edge 211 is located in the first overlapping area. In the third direction Y, the width of the first overlapping area is W1, and the end of the first arcuate edge 211 away from the heat exchanger 3 is the second end, and the distance from the second end to the heat exchanger 3 is L2, satisfying: L2>W1, and the second bus 22 includes a second overlapping area that is in contact with the heat exchanger 3, and a portion of the second arcuate edge 221 is located in the second overlapping area. In the third direction Y, the width of the second overlapping area is W2, and the end of the second arcuate edge 221 away from the heat exchanger 3 is the fourth end, and the distance from the fourth end to the heat exchanger 3 is L4, satisfying: L4>W2.

[0174] That is to say, by constructing the first arc-shaped edge 211 on the first side, the gap between the first bus 21 and the second bus 22 on the side of the heat exchanger 3 can be increased, and part of the first arc-shaped edge 211 is located in the first overlapping area. On the one hand, the heat exchanger 3 can better exchange heat with the bus 2, which is conducive to keeping the battery cell 11 in a better operating temperature range. On the other hand, it can also better prevent condensation from short-circuiting the two adjacent busbars 2. That is, compared with the bus 2 without the first arc-shaped edge 211, the distance between the two adjacent busbars 2 is closer. Therefore, no matter how much the bending radius of the first arc-shaped edge 211 is and how much the first arc-shaped edge 211 is located in the first overlapping area, as long as part of the first arc-shaped edge 211 is located outside the first overlapping area, in principle, the distance between the two adjacent busbars 2 on the side close to the heat exchanger 3 is increased, which can reduce the risk of condensation short-circuiting the two adjacent busbars 2.

[0175] Similarly, by constructing the second arc-shaped edge 221 on the second side, the gap between the first bus 21 and the second bus 22 on the side of the heat exchanger 3 can be increased, and part of the second arc-shaped edge 221 is located in the second overlapping area. On the one hand, the heat exchanger 3 can better exchange heat with the bus 2, which is conducive to keeping the battery cell 11 in a better operating temperature range. On the other hand, it can also better prevent condensation from short-circuiting the two adjacent bus 2. That is, compared with the bus 2 without the second arc-shaped edge 221, the distance between the two adjacent bus 2 is closer. Therefore, no matter how much the bending radius of the second arc-shaped edge 221 is and how much the second arc-shaped edge 221 is located in the second overlapping area, as long as part of the second arc-shaped edge 221 is located outside the second overlapping area, in principle, the distance between the two adjacent bus 2 on the side close to the heat exchanger 3 is increased, which can reduce the risk of condensation short-circuiting the two adjacent bus 2.

[0176] Exemplarily, for the plurality of busbars 2 arranged along the first direction X, the two busbars 2 located at the two ends may have only the first arc-shaped edge 211 , or only the second arc-shaped edge 221 .

[0177] Exemplarily, for multiple bus bars 2 arranged along the first direction X, each bus bar 2 can have exactly the same structure, and each bus bar 2 has a first arcuate edge 211 and a second arcuate edge 221 on both sides of the first direction X, respectively. In this way, multiple bus bars 2 are arranged in sequence and spaced apart along the first direction X, and the first arcuate edge 211 and the second arcuate edge 221 can better increase the distance between two adjacent bus bars 2 on the side close to the heat exchanger 3, thereby reducing the risk of condensation short-circuiting two adjacent bus bars 2.

[0178] In the above example, by making the first bus 21 fit against the heat exchange element 3, the heat exchange element 3 can better exchange heat with the first bus 21, and by making the second bus 22 fit against the heat exchange element 3, the heat exchange element 3 can better exchange heat with the second bus 22. In addition, by satisfying the above conditions, the distance between the two adjacent bus bars 2 on the side close to the heat exchange element 3 is increased, thereby reducing the risk of condensation short-circuiting the two adjacent bus bars 2.

[0179] In some embodiments of the present application, the width of the first overlapping area is W1 and satisfies: W1 ≥ 1 mm; the width of the second overlapping area is W2 and satisfies: W2 ≥ 1 mm.

[0180] Illustratively, the width W1 of the first overlapping area may be 1 mm, 5 mm, 10 mm, 20 mm, etc., and this application does not impose any limitation thereto.

[0181] Exemplarily, the width W2 of the second overlapping area may be 1 mm, 5 mm, 10 mm, 20 mm, etc., and this application does not impose any limitation thereto.

[0182] In the above example, by making the first overlapping area and the second overlapping area meet the above conditions, the connection between the first bus bar 21, the second bus bar 22 and the heat exchange element 3 can be made more stable, and the heat exchange effect is also better.

[0183] Please refer to Figure 7 , Figure 7 It is a schematic structural diagram of a busbar 2, a battery cell assembly 1 and a heat exchanger 3 according to an embodiment of the present application.

[0184] In some embodiments of the present application, Figure 7 As shown, the bus 2 is L-shaped, including a first portion 23 extending along a first direction X and a second portion 24 extending along a third direction Y, the second portion 24 is connected to a side of the first portion 23 close to the heat exchange element 3, and at least part of the second portion 24 overlaps with the heat exchange element 3, and the first arcuate edge 211 is located at the first portion 23.

[0185] In other words, the L-shaped bus 2 is compact and reasonable, and the second part 24 partially overlaps with the heat exchanger 3, which effectively saves the internal space of the battery device 100, making the overall structure more delicate and conducive to miniaturization and lightweight design. In terms of electrical connection, the first part 23 extends along the first direction X to ensure stable connection with the pole 111 of the battery cell 11, smooth current transmission, and reduced line loss; in terms of heat dissipation coordination, the overlapping design of the L-shaped bus 2 and the heat exchanger 3 accelerates heat transfer, which can better maintain the appropriate temperature of the battery and improve the battery life and performance. The mechanical stability is enhanced, and the L-shaped bus 2 buffers stress when the vehicle 1000 vibrates, reducing the risk of loosening and displacement of the bus 2, ensuring long-term reliable power supply, and reducing maintenance costs.

[0186] In addition, the L-shaped bus 2 can also better increase the distance between two adjacent busbars 2 on the basis of overlapping with the heat exchange element 3 for heat exchange. Moreover, even if the distance between the first parts 23 of two adjacent busbars 2 is relatively close because the first part 23 is to connect two adjacent poles 111, a first arcuate edge 211 can be set on the first part 23, and even a second arcuate edge 221 can be set, so as to better increase the distance between the first parts 23 of the two busbars 2 on the side close to the heat exchange element 3, so that the two adjacent busbars 2 are not easily short-circuited due to condensation.

[0187] In the above example, by making the busbar 2 an L-shaped structure, the distance between the first parts 23 of the two busbars 2 on the side close to the heat exchanger 3 can be increased, so that the two adjacent busbars 2 are not easily short-circuited due to condensation, and can also be better connected to the heat exchanger 3, which can better maintain the appropriate temperature of the battery and improve the battery life and performance. Mechanical stability is enhanced.

[0188] In some embodiments of the present application, within a projection plane perpendicular to the second direction Z, the projection plane of the busbar 2 includes a semicircular area.

[0189] Exemplarily, the busbar 2 is a semicircular busbar 2 .

[0190] Exemplarily, the bus 2 includes a first area and a second area. In the projection plane perpendicular to the second direction Z, the projection shape of the first area is a rectangle, and the projection shape of the second area is a semicircle. In the first direction X, the length of the rectangle is greater than or equal to the diameter of the semicircle. In terms of electrical performance optimization, the rectangular projection of the first area ensures the stability of current conduction, provides a reliable connection path between the battery cells 11, effectively reduces the contact resistance, and improves the smoothness of power transmission; the semicircular projection of the second area disperses the electric field better with its smooth contour, reduces the risk of tip discharge, and effectively ensures the safety of the electrical system. In terms of spatial adaptability, the combined structure of the rectangle and the semicircle is very compact, which can not only meet the diversified battery layout requirements of different models, but also make full use of the corner space, significantly improve the space utilization rate of the battery pack, and contribute to the lightweight design of the vehicle 1000. In addition, the above design makes the heat dissipation performance also excellent. During the heat conduction process, the semicircular area can make the heat diffuse more evenly to the surrounding area, cooperate with the heat exchanger 3, further improve the heat dissipation efficiency, maintain the stability of the battery operating temperature, extend the battery life, and ensure the stable performance of the vehicle 1000.

[0191] In the above example, the semicircular busbar 2 disperses the electric field better due to its smooth contour, reduces the risk of tip discharge, and effectively ensures the safety of the electrical system.

[0192] In some embodiments of the present application, the heat exchange element 3 includes a heat exchange plate or a heat exchange tube, and the heat exchange plate or the heat exchange tube can be attached to the side surface of the battery cell assembly 1 in the second direction Z.

[0193] That is to say, by arranging the heat exchange plate in a fitting manner on the side of the battery cell assembly 1 in the second direction Z, the heat exchange effect between the heat exchange plate and the battery cell assembly 1 can be better improved, which is beneficial for keeping the battery cell assembly 1 at a suitable operating temperature, thereby effectively improving the working efficiency of the battery cell assembly 1.

[0194] Exemplarily, the heat exchange plate may include an upper plate and a lower plate, and the upper plate and the lower plate are spliced ​​up and down to form a flow channel between the upper plate and the lower plate, and the refrigerant flows through the flow channel to exchange heat with the battery cell assembly 1. Exemplarily, the heat exchange plate may also be a plate body with heat conductivity, and the cold pipe is arranged on the plate body in a curved and extended manner. It can be understood that the heat exchange element 3 may also be other plate-shaped heat exchange structures, and this application does not limit it.

[0195] In the above examples, the heat exchange plate or heat exchange tube has a simple structure, good heat exchange effect, and is simple and convenient to assemble.

[0196] In some embodiments of the present application, in a projection plane perpendicular to the second direction Z, the heat exchange plate is a rectangular plate body.

[0197] In the above example, the heat exchange plate is a rectangular plate. In terms of installation adaptability, the regular rectangular shape is highly compatible with the surrounding structure, easy to layout in a limited space, and has a large adjustment margin during installation, which reduces the difficulty of assembly and improves production efficiency. In terms of maintenance convenience, its simple structure makes it easy for maintenance personnel to quickly identify fault points, replace parts or clean and maintain, shorten maintenance time, and reduce operation and maintenance costs.

[0198] In some embodiments of the present application, the battery cell 11 is a square battery cell 11 .

[0199] In the above example, when the battery cell 11 is a square battery cell 11, in terms of space utilization, the square structure is regular and can be arranged closely compared to the special-shaped battery cells 11, which can better reduce the internal gaps of the battery assembly, so that the space can be fully utilized, which is conducive to lightweight layout. In terms of mechanical stability, the square symmetrical shape makes it evenly stressed under various driving conditions of the vehicle 1000, effectively avoiding displacement and collision between battery cells 11, reducing the risk of damage caused by mechanical impact, ensuring the integrity of the battery system, and extending the service life. In terms of heat dissipation performance, the plane of the square battery cell 11 fits closely with the heat exchanger 3, the heat conduction path is short and direct, and the heat can be dissipated quickly. In conjunction with the heat exchange system, the battery operating temperature can be stabilized, the charging and discharging performance can be improved, and the endurance of the vehicle 1000 can be ensured to be stable. During production and manufacturing, the square design is easy to standardize and scale up, the mold is simple to make, and the process is mature, which can greatly improve production efficiency and reduce manufacturing costs.

[0200] The present application also provides an electrical device.

[0201] According to the electric device of the embodiment of the present application, the electric device may include a battery device 100, and the battery device 100 is used to store or provide electric energy.

[0202] In the above example, by providing the battery device 100 of the above example, the electrical device of the present application can have higher reliability and good safety.

[0203] Other structures and operations of the battery device 100 and the electrical device according to the embodiment of the present application are known to those skilled in the art and will not be described in detail here.

[0204] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0205] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that: include: A battery cell assembly (1), the battery cell assembly (1) comprising a plurality of battery cells (11), the plurality of battery cells (11) being arranged in sequence along a first direction (X), and a pole (111) being provided on a side of the battery cell (11) in a second direction (Z); A busbar (2), wherein a plurality of the busbars (2) are provided, and each of the busbars (2) is connected to two adjacent poles (111); A heat exchanger (3), the heat exchanger (3) being arranged on a side of the battery cell assembly (1) in a second direction (Z), the bus bar (2) being located on at least one side of the heat exchanger (3) in a third direction (Y), wherein: Two adjacent bus bars (2) in the first direction (X) are respectively a first bus bar (21) and a second bus bar (22); a separation area is provided between the first bus bar (21), the second bus bar (22) and the heat exchange element (3); in the separation area, a side edge of the first bus bar (21) is a curved first arc-shaped edge (211) so as to increase the distance between the first bus bar (21) and the second bus bar (22) on the side close to the heat exchange element (3).

2. The battery device according to claim 1, characterized in that: The side of the first bus (21) close to the second bus (22) is a first side, and in the direction from the bus (2) to the heat exchange element (3), at least a portion of the first side is constructed as the first arc-shaped side (211) bent in a direction away from the second bus (22).

3. The battery device according to claim 1, characterized in that: The side edge of the first busbar (21) connected to the first arc-shaped edge (211) is tangent to the first arc-shaped edge (211).

4. The battery device according to claim 1, characterized in that: The first arc-shaped edge (211) comprises a first arc edge that extends in a curved manner.

5. The battery device according to claim 4, characterized in that: The first arc side is in a quarter arc shape.

6. The battery device according to claim 4, characterized in that: The radius R1 of the first arc edge satisfies: 1mm≤R1≤40mm.

7. The battery device according to claim 1, characterized in that: In the third direction (Y), the first bus bar (21) is spaced apart from the heat exchange element (3); The end of the first arc-shaped edge (211) close to the heat exchange element (3) is the first end, and in the first direction (X), the distance L1 from the first end to the second bus (22) satisfies: L1 ≥ 1 mm, and / or, The end of the first arcuate edge (211) away from the heat exchange element (3) is the second end, and in the third direction (Y), the distance L2 from the second end to the heat exchange element (3) satisfies: L2 ≥ 1 mm.

8. The battery device according to claim 1, characterized in that: The first busbar (21) includes a first overlapping area that is in contact with the heat exchange element (3), and a portion of the first arcuate edge (211) is located in the first overlapping area. In the third direction (Y), the width of the first overlapping area is W1, and the end of the first arcuate edge (211) away from the heat exchange element (3) is the second end. The distance from the second end to the heat exchange element (3) is L2, satisfying: L2>W1.

9. The battery device according to claim 8, characterized in that: The width of the first overlapping area is W1 and satisfies: W1 ≥ 1 mm.

10. The battery device according to claim 1, characterized in that: In the separation area, the side edge of the second bus bar (22) is a curved second arc-shaped edge (221) to increase the distance between the first bus bar (21) and the second bus bar (22) on the side close to the heat exchange element (3).

11. The battery device according to claim 10, characterized in that: The side of the second bus (22) close to the first bus (21) is a second side, and in the direction from the bus (2) to the heat exchange element (3), at least a portion of the second side is constructed as a second arc-shaped side (221) that bends in a direction away from the first bus (21).

12. The battery device according to claim 10, characterized in that: The side edge of the second busbar (22) connected to the second arc-shaped edge (221) is tangent to the second arc-shaped edge (221).

13. The battery device according to claim 10, characterized in that: The first arcuate edge (211) comprises a first arcuate edge that is bent and extended, and the second arcuate edge (221) comprises a second arcuate edge that is bent and extended.

14. The battery device according to claim 13, characterized in that: The first arc edge is a quarter circle, and / or the second arc edge is a quarter circle.

15. The battery device according to claim 13, characterized in that: The radius R1 of the first arc edge satisfies: 1mm≤R1≤40mm; The radius R2 of the second arc edge satisfies: 1mm≤R2≤40mm.

16. The battery device according to claim 10, characterized in that: In the third direction (Y), the first bus bar (21) is spaced apart from the heat exchange element (3), and the second bus bar (22) is spaced apart from the heat exchange element (3); The end of the first arcuate edge (211) close to the heat exchange element (3) is the first end, the end of the second arcuate edge (221) close to the heat exchange element (3) is the third end, and in the first direction (X), the distance from the first end to the third end is L3, which satisfies: L3 ≥ 1 mm, and / or, The end of the first arcuate edge (211) away from the heat exchange element (3) is the second end, and the end of the second arcuate edge (221) away from the heat exchange element (3) is the fourth end. In the third direction (Y), the distance L2 from the second end to the heat exchange element (3) satisfies: L2 ≥ 1 mm, and the distance L4 from the fourth end to the heat exchange element (3) satisfies: L4 ≥ 1 mm.

17. The battery device according to claim 10, characterized in that: The first busbar (21) comprises a first overlapping region that is in contact with the heat exchange element (3); a portion of the first arc-shaped edge (211) is located in the first overlapping region; in the third direction (Y), a width of the first overlapping region is W1; an end of the first arc-shaped edge (211) that is away from the heat exchange element (3) is a second end; a distance from the second end to the heat exchange element (3) is L2, satisfying: L2>W1, The second bus (22) includes a second overlapping area that is in contact with the heat exchange element (3), and a portion of the second arc-shaped edge (221) is located in the second overlapping area. In the third direction (Y), the width of the second overlapping area is W2, and the end of the second arc-shaped edge (221) away from the heat exchange element (3) is a fourth end. The distance from the fourth end to the heat exchange element (3) is L4, satisfying the following: L4>W2.

18. The battery device according to claim 17, characterized in that: The width of the first overlapping area is W1, which satisfies: W1 ≥ 1 mm; The width of the second overlapping area is W2 and satisfies: W2 ≥ 1 mm.

19. The battery device according to claim 1, characterized in that: The busbar (2) is L-shaped, comprising a first portion (23) extending along a first direction (X) and a second portion (24) extending along a third direction (Y), the second portion (24) being connected to a side of the first portion (23) close to the heat exchange element (3), and at least a portion of the second portion (24) and the heat exchange element (3) overlap, and the first arc-shaped edge is located at the first portion (23).

20. The battery device according to claim 1, characterized in that In a projection plane perpendicular to the second direction (Z), the projection plane of the busbar (2) includes a semicircular area.

21. The battery device according to claim 1, characterized in that: The heat exchange element (3) comprises a heat exchange plate or a heat exchange tube.

22. An electrical device, characterized in that: A battery device (100) comprising any one of claims 1-21.

Images