Battery pack and vehicle

Abstract

The application discloses a battery pack and a vehicle, and belongs to the technical field of battery packs for vehicles. The battery pack comprises a battery cell assembly, wherein the battery cell assembly comprises a top surface and a bottom surface arranged oppositely, and an end surface intersecting with the top surface and the bottom surface; and the temperature control member comprises at least two temperature control units, wherein the temperature control units are arranged on at least two surfaces of the top surface, the bottom surface and the end surface, at least one temperature control unit can be independently controlled, when the temperature control member is in a temperature control state, all the temperature control units of the temperature control member are in the temperature control state or part of the temperature control units are in the temperature control state, and the temperature control units can heat or dissipate heat for the battery cell assembly. In this way, the temperature of the battery cell assembly 1 can be quickly adjusted in multiple directions, the temperature control direction of the battery cell assembly 1 can be flexibly selected, the temperature control efficiency of the battery pack is ensured, and meanwhile, the application scene of the battery pack is not limited.

Description

Technical Field

[0001] This application belongs to the field of automotive battery pack technology, specifically relating to a battery pack and a vehicle. Background Technology

[0002] With the continuous development of electric vehicles, the application scenarios of battery packs in electric vehicles under extreme conditions are also increasing, which leads to greater challenges for battery packs in coping with extreme environments. If the temperature of the battery pack is not controlled in a timely manner, it will cause rapid temperature changes, which will not only cause battery pack aging and affect its service life, but also pose safety hazards.

[0003] Therefore, timely temperature control of the battery pack is required. Currently, the temperature control method for the battery pack usually involves setting a temperature control device at the bottom of the battery pack to conduct heat through the bottom contact surface to achieve heating or cooling. However, the above temperature control method limits the direction of temperature control of the battery pack and cannot meet the overall temperature control requirements of the battery pack. Summary of the Invention

[0004] The purpose of this application is to provide a battery pack and vehicle that at least solves the problem that the existing battery pack's temperature control direction is limited, resulting in the inability to meet the overall temperature control requirements of the battery pack.

[0005] In a first aspect, embodiments of this application provide a battery pack, the battery pack comprising: A battery cell assembly, the battery cell assembly including a top surface and a bottom surface disposed opposite each other, and an end surface intersecting both the top surface and the bottom surface; A temperature control component includes at least two temperature control elements. Temperature control elements are disposed on at least two of the top surface, bottom surface, and end surface. At least one of the temperature control elements can independently control the temperature. When the temperature control component is in a temperature control state, all the temperature control elements included in the temperature control component are in a temperature control state or some of the temperature control elements are in a temperature control state, and the temperature control elements can heat or dissipate heat from the battery cell assembly.

[0006] In some embodiments, the temperature control component includes a top temperature control, a bottom temperature control, and an end temperature control. The top temperature control is disposed on the top surface, the bottom temperature control is disposed on the bottom surface, and the end temperature control is disposed on the end surface. The temperature control component includes a first temperature control state and a second temperature control state. In the first temperature control state, the top temperature control, the bottom temperature control, and the end temperature control are all in a temperature control state. In the second temperature control state, one or two of the top temperature control, the bottom temperature control, and the end temperature control are in a temperature control state.

[0007] In some embodiments, a first pole and a second pole are provided on the top surface, a first conductive element is provided between the first pole and the top temperature control, and a second conductive element is provided between the second pole and the top temperature control.

[0008] In some embodiments, the top temperature control unit includes a temperature control body and a first temperature control portion and a second temperature control portion located at two ends of the temperature control body in the length direction; The first conductive element is disposed between the first temperature control unit and the first electrode post, and the second conductive element is disposed between the second temperature control unit and the second electrode post; Wherein, the dimensions of the first temperature control unit in the first direction and the second temperature control unit in the first direction are both smaller than the dimensions of the temperature control body in the first direction, and the first direction is the direction from the bottom surface to the top surface.

[0009] In some embodiments, there is a gap between the first conductive element and the temperature control body, and a gap between the second conductive element and the temperature control body.

[0010] In some embodiments, the orthographic projection of the first electrode post along the first direction and the orthographic projection of the first conductive element along the first direction are both located within the orthographic projection of the first temperature control unit along the first direction, and the orthographic projection of the second electrode post along the first direction and the orthographic projection of the second conductive element along the first direction are both located within the orthographic projection of the first temperature control unit along the first direction.

[0011] In some embodiments, the battery pack further includes a battery housing, wherein the battery housing, the cell assembly, and the temperature control device are all installed inside the battery housing; There are gaps between the end of the first temperature control unit away from the temperature control body and the battery box, between the end of the second temperature control unit away from the temperature control body and the battery box, between the end of the first conductive element away from the temperature control body and the battery box, and between the end of the second conductive element away from the temperature control body and the battery box.

[0012] In some embodiments, the first conductive element and the second conductive element are both connecting plates, the battery cell assembly includes multiple battery cells connected in series, and the connecting plate has multiple through holes, each through hole corresponding to one of the battery cells.

[0013] In some embodiments, an insulating heat-conducting element is provided between the first conductive element and the first temperature control unit, and between the second conductive element and the second temperature control unit.

[0014] In some embodiments, the temperature control device is a fluid temperature control plate, and the temperature control device includes a water nozzle. The water nozzle of each temperature control device faces the side close to the battery cell assembly. When the temperature control device heats the battery cell assembly, the fluid in the fluid temperature control plate is a heating fluid. When the temperature control device dissipates heat from the battery cell assembly, the fluid in the fluid temperature control plate is a cooling fluid.

[0015] In some embodiments, each of the water nozzles is connected to a flow control valve.

[0016] In some embodiments, the temperature control device disposed on the top surface may include multiple sub-fluid plates, with each pair of adjacent sub-fluid plates connected by a connecting water pipe.

[0017] In some embodiments, the end faces are two opposing surfaces of the battery cell assembly along its length, and the temperature control includes a top temperature control, a bottom temperature control, and an end temperature control.

[0018] Secondly, embodiments of this application provide a vehicle that includes the battery pack described in the first aspect above.

[0019] According to the embodiments of this application, since the battery cell assembly includes a top surface and a bottom surface disposed opposite to each other, and an end surface intersecting both the top and bottom surfaces, and the temperature control component includes at least two temperature control elements, with temperature control elements disposed on at least two of the top, bottom, and end surfaces, the at least two surfaces of the battery cell assembly facing different directions can be temperature-controlled through these temperature control elements. This allows the heat generated by the battery cell assembly to be temperature-controlled in at least two different directions, thereby achieving multi-directional rapid temperature adjustment of the battery cell assembly. Furthermore, since at least one temperature control element can be independently temperature-controlled, the number of temperature control elements can be controlled to ensure that a different number of temperature control elements included in the temperature control component are in a temperature-controlled state. This allows, on the one hand, all temperature control elements included in the temperature control component to be in a temperature-controlled state, maximizing the temperature control efficiency of the battery cell assembly; and on the other hand, it allows some of the at least two temperature control elements to be in a temperature-controlled state, ensuring the temperature control efficiency of the battery cell assembly while saving the energy required by the temperature control component. This allows for flexible selection of the number of temperature control units based on the internal temperature distribution of the battery module, enabling precise control of the temperature control direction of the battery cell assembly. This achieves precise configuration of temperature control resources for the battery cell assembly, further improving the temperature control efficiency of the battery pack. Simultaneously, since the temperature control unit can heat or dissipate heat from the battery cell assembly when in temperature control mode, the temperature control component can not only promptly dissipate heat from the battery cell assembly under high-temperature conditions, transferring heat from the battery cell assembly to the temperature control unit for multi-directional rapid heat dissipation, but also promptly heat the battery cell assembly under low-temperature conditions, transferring heat from the temperature control unit to the battery cell assembly for multi-directional rapid temperature increase. In summary, the embodiments of this application not only enable multi-directional and rapid temperature adjustment of the battery cell assembly, allowing the temperature of the battery cell assembly to be controlled in at least two different directions, but also allow for flexible selection of the temperature control direction of the battery cell assembly to ensure the temperature control efficiency of the battery pack. At the same time, the battery cell assembly can be adapted not only to high-temperature conditions but also to low-temperature conditions, thereby improving the adaptability of the battery pack and making the application scenarios of the battery pack unrestricted. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an exploded view of a battery pack provided in an embodiment of this application; Figure 2 This is a schematic diagram illustrating the structure of a battery pack provided in an embodiment of this application; Figure 3 This is a schematic diagram showing the assembly of a battery pack including a battery housing and a temperature control component, according to an embodiment of this application.

[0022] Figure 4 This is a screenshot showing a battery pack provided in an embodiment of this application; Figure 5 This application provides a battery pack in an embodiment where... Figure 4 A magnified view of point A in the diagram; Figure 6 This is a schematic diagram illustrating the assembly of a battery pack including a top temperature control, according to an embodiment of this application.

[0023] Figure label: 1: Battery cell assembly; 11: Battery cell; 2: Temperature control component; 21: Top temperature control component; 211: Temperature control body; 212: First temperature control unit; 213: Second temperature control unit; 214: Connecting water pipe; 22: Bottom temperature control component; 23: End temperature control component; 3: First terminal; 4: Second terminal; 5: First conductive component; 51: Through hole; 6: Second conductive component; 7: Battery housing; 8: Water tap. Detailed Implementation

[0024] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0025] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] like Figures 1 to 4 As shown in the figure, this application embodiment provides a battery pack, which includes: The battery cell assembly 1 includes a top surface and a bottom surface disposed opposite each other, and an end surface that intersects both the top surface and the bottom surface.

[0028] Temperature control component 2 includes at least two temperature control elements. Temperature control elements are provided on at least two surfaces, including the top surface, bottom surface, and end surface. At least one temperature control element can independently control the temperature. When the temperature control component is in a temperature control state, all temperature control elements included in the temperature control component 2 are in a temperature control state or some temperature control elements are in a temperature control state, and the temperature control elements can heat or dissipate heat to the battery cell assembly 1.

[0029] As can be seen from the above embodiments, in this application embodiment, since the battery cell assembly 1 includes a top surface and a bottom surface disposed opposite to each other, and an end surface intersecting both the top and bottom surfaces, and the temperature control component 2 includes at least two temperature control elements, with temperature control elements disposed on at least two of the top, bottom, and end surfaces, the at least two surfaces of the battery cell assembly 1 facing different directions can be temperature-controlled through the temperature control elements. This allows the heat generated by the battery cell assembly 1 to be temperature-controlled through at least two different directions, thereby achieving multi-directional rapid temperature adjustment of the battery cell assembly 1. Furthermore, since at least one temperature control element can be independently temperature-controlled, the number of temperature control elements can be controlled to allow the temperature control component 2 to be in a temperature-controlled state with different numbers of included temperature control elements. In this way, on the one hand, all temperature control elements included in the temperature control component 2 can be in a temperature-controlled state to maximize the temperature control efficiency of the battery cell assembly 1; on the other hand, some of the temperature control elements among the at least two temperature control elements can be in a temperature-controlled state to ensure the temperature control efficiency of the battery cell assembly 1 while saving the energy required by the temperature control component 2. In this way, the number of temperature control units can be flexibly selected based on the internal temperature distribution of the battery module, thereby flexibly controlling the temperature control direction of the cell assembly 1. This achieves precise configuration of the temperature control resources of the cell assembly 1, further improving the temperature control efficiency of the battery pack. Simultaneously, since the temperature control unit can heat or dissipate heat from the cell assembly 1 when it is in temperature control mode, the temperature control component 2 can not only dissipate heat from the cell assembly 1 in a timely manner when it is in a high-temperature condition, transferring the heat from the cell assembly 1 to the temperature control unit for multi-directional rapid heat dissipation, but also heat the cell assembly 1 in a timely manner when it is in a low-temperature condition, transferring the heat from the temperature control unit to the cell assembly for multi-directional rapid temperature increase. In summary, the embodiments of this application not only enable multi-directional rapid temperature adjustment of the cell assembly 1, allowing the temperature of the cell assembly 1 to be controlled in at least two different directions, but also allow for flexible selection of the temperature control direction of the cell assembly 1 to ensure the temperature control efficiency of the battery pack. Furthermore, the cell assembly 1 can be adapted to both high-temperature and low-temperature operating conditions, thereby improving the adaptability of the battery pack and making its application scenarios unrestricted.

[0030] In this application embodiment, the battery cell assembly 1 can be a cylindrical, square, blade-shaped or other structure with multiple surfaces. Taking the battery cell assembly 1 as a blade shape as an example, the bottom surface and top surface of the battery cell assembly 1 can be two opposite surfaces of the battery cell assembly 1 on the height square, and the end surface can be two opposite surfaces of the battery cell assembly 1 in the length direction. This application embodiment does not limit this.

[0031] It should be noted that the temperature control device 2, including the temperature control element, can be one or more of the heat exchange methods such as fluid type, air-cooled type or contact type, and the embodiments of this application do not limit this.

[0032] It should also be noted that the temperature control state of the temperature control component 2 can be understood as follows: On the one hand, all temperature control elements included in the temperature control component 2 can be in a temperature control state, meaning all temperature control elements are in working condition, that is, the temperature of the battery cell assembly 1 can be controlled through all temperature control elements, thereby maximizing the temperature control efficiency of the battery cell assembly 1. On the other hand, some temperature control elements included in the temperature control component 2 can be in a temperature control state, meaning some temperature control elements are in a non-working condition, that is, the temperature of the battery cell assembly 1 can be controlled through some temperature control elements. For example, if the temperature-controlled parts of the battery cell assembly 1 are concentrated on the bottom and end surfaces, temperature control can be performed through the temperature control elements set on the bottom and end surfaces; if the temperature-controlled parts of the battery cell assembly 1 are concentrated on the top and end surfaces, temperature control can be performed through the temperature control elements set on the top and end surfaces.

[0033] Furthermore, in this embodiment, since multiple temperature control devices can independently control the temperature, their temperature control states do not interfere with each other. In other words, flexible combinations of temperature control methods among multiple temperature control devices can be achieved. Switching between the temperature control states of multiple temperature control devices can be achieved through control components in the battery pack application scenario. For example, if the battery pack is applied to a vehicle, it can be controlled by the vehicle's temperature control system and control valve group to switch the temperature control device 2 between a first temperature control state and a second temperature control state. It should be noted that when the temperature control device dissipates heat from the battery cell assembly 1, the heat flow path between the battery cell assembly 1 and the temperature control device is such that heat from the battery cell assembly 1 flows to the temperature control device, and the temperature of the temperature control device is lower than the temperature of the battery cell assembly 1. When the temperature control device heats the battery cell assembly 1, the heat flow path between the battery cell assembly 1 and the temperature control device is such that heat from the temperature control device flows to the battery cell assembly, and the temperature of the temperature control device is higher than the temperature of the battery cell assembly 1.

[0034] Regarding the specific structure of the temperature control component 2, in some embodiments, the temperature control component 2 includes a top temperature control 21, a bottom temperature control 22, and an end temperature control 23. The top temperature control 21 is disposed on the top surface, the bottom temperature control 22 is disposed on the bottom surface, and the end temperature control 23 is disposed on the end surface. The temperature control component 2 includes a first temperature control state and a second temperature control state. In the first temperature control state, the top temperature control 21, the bottom temperature control 22, and the end temperature control 23 are all in the temperature control state. In the second temperature control state, one or two of the top temperature control 21, the bottom temperature control 22, and the end temperature control 23 are in the temperature control state.

[0035] In this embodiment, the top surface can be temperature-controlled via the top temperature control 21, the bottom surface via the bottom temperature control 22, and the end surface via the end temperature control 23. This allows for temperature control of the battery cell assembly 1 in four directions (top, bottom, and end), enabling multi-directional temperature adjustment. In the first temperature control state, all three temperature control devices (top, bottom, and end) can be in a controlled state, maximizing the temperature control of the battery cell assembly 1. In the second state, one or two of these devices can be in a controlled state, allowing selection of specific temperature control devices to meet the battery module's temperature control requirements while reducing energy consumption.

[0036] It should be noted that in the second state, any one of the top temperature control 21, bottom temperature control 22, and end temperature control 23 can be in a temperature-controlled state, or any two of the top temperature control 21, bottom temperature control 22, and end temperature control 23 can be in a temperature-controlled state. The top temperature control 21, bottom temperature control 22, and end temperature control 23 can be determined based on the temperature distribution of the cell assembly 1, and this embodiment does not limit this. The temperature distribution can be detected in real time by an external temperature detection component. For example, if the battery pack is used in a vehicle, it can be detected in real time by the temperature control system included in the vehicle. In addition, it should be noted that there can be one or two end temperature controls 23 on the end face, and this embodiment does not limit this.

[0037] It should also be noted that the bottom temperature control device 22 can be attached to the lower shell of the battery pack and can be integrated with the battery pack by welding or riveting. The top temperature control device 21 can be attached to the terminal post or the top surface of the cell assembly 1 by using thermally conductive adhesive or thermally conductive pad. The end temperature control device 23 can be directly attached to the end plate of the cell assembly 1. This facilitates the overall installation of the battery pack and ensures the temperature control efficiency of the battery pack.

[0038] In some embodiments, such as Figure 1 and Figure 5 As shown, a first pole post 3 and a second pole post 4 are provided on the top surface. A first conductive element 5 is provided between the first pole post 3 and the top temperature control element 21, and a second conductive element 6 is provided between the second pole post 4 and the top temperature control element 21.

[0039] In this embodiment, since the first terminal 3 and the second terminal 4 are arranged on the top surface, the first terminal 3 and the second terminal 4 are arranged on the same side, which can reduce the space occupied by the battery pack in the height direction, improve the effective space utilization of the battery pack, and simplify the battery pack manufacturing process. At the same time, the same-side layout of the first terminal 3 and the second terminal 4 can shorten the current transmission path, reduce the internal resistance of the battery pack, and reduce energy loss. Furthermore, since the first conductive element 5 is arranged between the first terminal 3 and the top temperature control element 21, and the second conductive element 6 is arranged between the second terminal 4 and the top temperature control element 21, the current transmission and module connection of the cell assembly 1 can be realized through the first conductive element 5 and the second conductive element 6. At the same time, the first conductive element 5 and the second conductive element 6 can both be temperature controlled by the top temperature control element 21 to ensure the overall temperature control performance of the battery pack.

[0040] It should be noted that the first conductive element 5 and the second conductive element 6 can be structures such as copper busbars, connecting plates, and copper-aluminum composite components, and this application embodiment does not limit them.

[0041] It should also be noted that, due to the arrangement of the first pole post 3, the second pole post 4, the first conductive element 5, and the second conductive element 6 on the top surface, the top temperature control unit 21 needs to be structured to avoid the first pole post 3, the second pole post 4, the first conductive element 5, and the second conductive element 6, so as to facilitate the installation of the first pole post 3, the second pole post 4, the first conductive element 5, and the second conductive element 6.

[0042] Based on this, in some embodiments, the top temperature control unit 21 includes a temperature control body 211 and a first temperature control portion 212 and a second temperature control portion 213 located at two ends of the temperature control body 211 along its length. A first conductive element 5 is disposed between the first temperature control portion 212 and the first electrode 3, and a second conductive element 6 is disposed between the second temperature control portion 213 and the second electrode 4. The dimensions of the first temperature control portion 212 and the second temperature control portion 213 in the first direction are both smaller than the dimensions of the temperature control body 211 in the first direction, where the first direction is the direction from the bottom surface to the top surface.

[0043] In this embodiment, since the dimensions of the first temperature control unit 212 and the second temperature control unit 213 in the first direction are both smaller than the dimensions of the temperature control body 211 in the first direction, a gap is formed between the first temperature control unit 212 and the battery cell assembly 1, and a gap is formed between the second temperature control unit 213 and the battery cell assembly 1. Thus, the first conductive element 5 and the first electrode 3 can be accommodated through the gap between the first temperature control unit 212 and the battery cell assembly 1, and the second conductive element 6 and the second electrode 4 can be accommodated through the gap between the second temperature control unit 213 and the battery cell assembly 1. The first conductive element 5 can be positioned between the first temperature control unit 212 and the first terminal 3, and the second conductive element 6 can be positioned between the second temperature control unit 213 and the second terminal 4. This allows the temperature of the battery cell assembly 1 to be transferred to the first temperature control unit 212 via the first terminal 3 and the first conductive element 5. Alternatively, the temperature of the top temperature control unit 21 can be transferred to the battery cell assembly 1 via the first temperature control unit 212, the first conductive element 5, and the first terminal 3. Heat can then be transferred to the second temperature control unit 213 via the second terminal 4 and the second conductive element 6. Alternatively, the temperature of the top temperature control unit 21 can be transferred to the battery cell assembly 1 via the second temperature control unit 213, the second conductive element 6, and the second terminal 4. This allows for overall temperature control of the battery pack without increasing the battery pack space.

[0044] It should be noted that the first direction is the direction from the bottom surface to the top surface, which can also be understood as the thickness of the battery cell assembly 1, or the direction that is perpendicular to both the plane containing the bottom surface and the plane containing the top surface.

[0045] In some embodiments, such as Figure 1 and Figure 5 As shown, there is a gap between the first conductive element 5 and the temperature control body 211, and there is a gap between the second conductive element 6 and the temperature control body 211.

[0046] In this embodiment, since there is a gap between the first conductive element 5 and the temperature control body 211, and a gap between the second conductive element 6 and the temperature control body 211, the gap between the first conductive element 5 and the temperature control body 211 provides an installation allowance for the installation of the first conductive element 5, and the gap between the second conductive element 6 and the temperature control body 211 provides an installation allowance for the installation of the second conductive element 6, thereby facilitating the installation of the first conductive element 5 and the second conductive element 6.

[0047] In some embodiments, the orthographic projection of the first electrode 3 along the first direction and the orthographic projection of the first conductive element 5 along the first direction are both located within the orthographic projection of the first temperature control unit 212 along the first direction, and the orthographic projection of the second electrode 4 along the first direction and the orthographic projection of the second conductive element 6 along the first direction are both located within the orthographic projection of the first temperature control unit 212 along the first direction.

[0048] In this embodiment, since the orthographic projections of the first electrode 3 along the first direction and the first conductive element 5 along the first direction are both located within the orthographic projection of the first temperature control unit 212 along the first direction, and the orthographic projections of the second electrode 4 along the first direction and the second conductive element 6 along the first direction are both located within the orthographic projection of the first temperature control unit 212 along the first direction, the current transmission function of the first conductive element 5 to the first electrode 3 and the current transmission function of the second conductive element 6 to the second electrode 4 can be guaranteed, as well as the temperature control effect of the first temperature control unit 212 and the second temperature control unit 213. At the same time, it is convenient to install the first conductive element 5, the first electrode 3, the second conductive element 6 and the second electrode 4.

[0049] In some embodiments, such as Figure 5 As shown, the battery pack also includes a battery housing 7. The battery housing 7, the cell assembly 1, and the temperature control component 2 are all installed inside the battery housing 7. There are gaps between the end of the first temperature control part 212 away from the temperature control body 211 and the battery housing 7, between the end of the second temperature control part 213 away from the temperature control body 211 and the battery housing 7, between the end of the first conductive component 5 away from the temperature control body 211 and the battery housing 7, and between the end of the second conductive component 6 away from the temperature control body 211 and the battery housing 7.

[0050] In this embodiment, since there are gaps between the end of the first temperature control unit 212 away from the temperature control body 211 and the battery box 7, between the end of the second temperature control unit 213 away from the temperature control body 211 and the battery box 7, between the end of the first conductive member 5 away from the temperature control body 211 and the battery box 7, and between the end of the second conductive member 6 away from the temperature control body 211 and the battery box 7, short circuits between the first conductive member 5, the second conductive member 6 and the battery box 7 can be avoided. At the same time, the current output of the battery pack to the outside can be completed through the gaps between the first conductive member 5 and the battery box 7 and the gaps between the second conductive member 6 and the battery box 7, thus avoiding the impact of the current transmission of the battery pack on the top temperature control unit 21.

[0051] It should be noted that the battery housing 7 can be a square shell structure, a cylindrical shell structure, or a shell of other shapes. The shape of the battery housing 7 is determined according to the shape of the battery cell assembly 1, and this embodiment does not limit this. A lug can be provided on the side wall of the battery housing 7, thereby facilitating the installation and fixation of the battery pack.

[0052] In some embodiments, such as Figure 1 and Figure 5 As shown, the first conductive element 5 and the second conductive element 6 are both connecting plates. The battery cell assembly 1 includes multiple battery cell assemblies 11 connected in series. Multiple through holes 51 are opened on the connecting plates, and each through hole 51 corresponds to a battery cell assembly 11.

[0053] In this embodiment, circuit transmission of the battery cell assembly 1 can be achieved through the connecting plate, while simultaneously improving the welding strength and current carrying capacity between the first conductive element 5 and the first terminal 3, and improving the welding strength and current carrying capacity between the second conductive element 6 and the second terminal 4, enabling the battery pack to adapt to high current density application scenarios. Since the battery cell assembly 1 includes multiple battery cell assemblies 11 connected in series, and the connecting plate has multiple through holes 51, each through hole 51 corresponding to a battery cell assembly 11, while achieving series connection of multiple battery cell assemblies 11 through the connecting plate, the connection stability between the connecting plate and each battery cell assembly 11 can be determined through each through hole 51, thereby ensuring that multiple battery cell assemblies 11 can be electrically connected to the connecting plate.

[0054] In some embodiments, an insulating heat-conducting element is provided between the first conductive element 5 and the first temperature control unit 212, and between the second conductive element 6 and the second temperature control unit 213. In this way, direct contact temperature control of the top temperature control unit 21 can be achieved through the insulating heat-conducting element, ensuring the temperature control efficiency of the top temperature control unit 21, while the insulating heat-conducting element can prevent short circuit between the first conductive element 5 and the second conductive element 6.

[0055] In some embodiments, the temperature control devices are all fluid temperature control plates, and each temperature control device includes a water nozzle 8. The water nozzle 8 of each temperature control device faces the side closer to the battery cell assembly 1. When the temperature control device heats the battery cell assembly 1, the fluid in the fluid temperature control plate is a heating fluid. When the temperature control device dissipates heat from the battery cell assembly 1, the fluid in the fluid temperature control plate is a heat dissipation fluid.

[0056] In this embodiment, since the water nozzle 8 included in each temperature control is oriented towards the side close to the cell assembly 1, the placement of the water nozzle 8 can avoid taking up additional space in the overall battery pack.

[0057] It should be noted that the principle of the fluid temperature control plate refers to a heat exchange method in which heat from the battery cell assembly 1 is exchanged by circulating fluid through the fluid temperature control plate, or the temperature of the fluid temperature control plate is transferred to the battery cell assembly. The fluid temperature control plate may include a heat exchange plate, fluid supply and return pipes, and a pump. The heat exchange plate is the core component of the fluid plate. The heat exchange plate is connected to the fluid heat-conducting fins. By circulating liquid through the heat exchange plate, the heat transferred from the fluid heat-conducting fins to the fluid is transferred to the fluid, and then the heat is carried away or transferred to the battery cell assembly 1 through the fluid supply and return pipes. The fluid temperature control plate mainly includes single-phase fluid plate technology and two-phase fluid plate technology. Single-phase can be understood as a change in one physical state; for example, heating a liquid to raise its temperature. Two-phase can be understood as a change in two physical states, such as heating a liquid to produce both a liquid and a gaseous state. It should also be noted that the heating fluid can be understood as the fluid flowing through the temperature control with a temperature greater than that of the battery cell assembly 1, so as to transfer the heat of the heating fluid in the temperature control to the battery cell assembly 1. The heat dissipation fluid can be understood as the fluid flowing through the temperature control with a temperature less than that of the battery cell assembly 1, so as to transfer the heat of the battery cell assembly 1 to the heat dissipation fluid in the temperature control.

[0058] Taking the heat dissipation of battery cell assembly 1 by a fluid temperature control plate as an example, in single-phase fluid plate technology, the coolant, driven by a pump, flows through the heat exchange channel and heat sink in direct contact with battery cell assembly 1. Forced convection heat transfer occurs between the coolant and the heat sink, absorbing the heat generated by the heating elements. Single-phase fluid plate technology utilizes the sensible heat of the coolant. Since the sensible heat of the coolant is much greater than that of air, the same flow rate of coolant can remove more heat. Furthermore, the thermal conductivity of the coolant and the forced convection heat transfer coefficient within the heat sink are both much greater than those of air. Therefore, the temperature control performance of single-phase fluid plate technology is far superior to that of air-cooled temperature control technology. In two-phase fluid plate technology, the coolant, driven by a pump, flows through the heat exchange channel and heat sink in direct contact with battery cell assembly 1. Since the temperature of the heat sink is higher than the boiling point of the coolant, the coolant undergoes flow boiling heat transfer within the heat exchange channel, absorbing a large amount of heat through phase change. Simultaneously, forced convection heat transfer also occurs, removing some heat. The latent heat of the coolant is greater than its sensible heat, so the heat flux density is higher in two-phase fluid plate technology compared to single-phase fluid plate technology. The specific form of the fluid plate depends on the temperature control requirements of the battery pack; this application does not limit this aspect.

[0059] In some embodiments, each faucet 8 is connected to a flow control valve.

[0060] In this embodiment, the temperature control efficiency of each temperature control component can be controlled by a flow control valve, so that the temperature control component 2 can implement a reasonable thermal management strategy based on the temperature distribution of the battery cell assembly 1, thereby reasonably selecting the cooling priority, and enabling the temperature control component 2 to be installed in a modular manner, further improving the adaptability of the battery pack.

[0061] In some embodiments, such as Figure 6 As shown, the temperature control unit on the top surface can include multiple sub-fluid plates, with each pair of adjacent sub-fluid plates connected by a water pipe 214. This allows for liquid circulation between the multiple sub-fluid plates via the water pipe 214, ensuring that the temperature control unit on the top surface maintains temperature control efficiency while reducing overall weight.

[0062] In some embodiments, the end faces are two opposing surfaces of the cell assembly 1 along its length, and the temperature control component (2) includes a top temperature control 21, a bottom temperature control 22, and an end temperature control 23. This allows the end temperature control 23 to be located at both ends of the cell assembly 1 along its length, while also placing the end temperature control 23 in the heat flow channel of the cell assembly 1, further improving the temperature control efficiency of the battery pack.

[0063] Furthermore, this application embodiment also provides a battery pack, which includes a cell assembly 1, the cell assembly 1 including a top surface and a bottom surface disposed opposite each other, and an end surface intersecting both the top surface and the bottom surface. A temperature control component 2 includes at least two temperature control devices, one of which is disposed on the top surface, the bottom surface, and both end surfaces.

[0064] In this embodiment, since the temperature control component 2 includes at least two temperature control devices, one on the top surface, one on the bottom surface, and one on each of the two end surfaces, the temperature of the battery cell assembly 1 can be controlled in four directions via the temperature control devices. This allows the battery cell assembly 1 to be controlled in multiple directions, ensuring that the temperature of the battery cell assembly 1 can be adjusted quickly in multiple directions.

[0065] This application provides a vehicle, characterized in that the vehicle includes the battery pack of any of the above embodiments.

[0066] It should be noted that the beneficial effects of this vehicle are the same as those of the aforementioned battery pack, and will not be repeated in this application embodiment. In this application embodiment, the type of vehicle includes, but is not limited to, hybrid vehicles, electric vehicles, etc.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0068] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, The battery pack includes: A battery cell assembly, the battery cell assembly including a top surface and a bottom surface disposed opposite each other, and an end surface intersecting both the top surface and the bottom surface; A temperature control component includes at least two temperature control elements. Temperature control elements are disposed on at least two of the top surface, bottom surface, and end surface. At least one of the temperature control elements can independently control the temperature. When the temperature control component is in a temperature control state, all or some of the temperature control elements included in the temperature control component are in a temperature control state. When the temperature control element is in a temperature control state, the temperature control element can heat or dissipate heat from the battery cell assembly.

2. The battery pack according to claim 1, characterized in that, The temperature control component includes a top temperature control, a bottom temperature control, and an end temperature control. The top temperature control is disposed on the top surface, the bottom temperature control is disposed on the bottom surface, and the end temperature control is disposed on the end surface. The temperature control component includes a first temperature control state and a second temperature control state. In the first temperature control state, the top temperature control, the bottom temperature control, and the end temperature control are all in a temperature control state. In the second temperature control state, one or two of the top temperature control, the bottom temperature control, and the end temperature control are in a temperature control state.

3. The battery pack according to claim 2, characterized in that, A first electrode and a second electrode are provided on the top surface. A first conductive element is provided between the first electrode and the top temperature control device, and a second conductive element is provided between the second electrode and the top temperature control device.

4. The battery pack according to claim 3, characterized in that, The top temperature control unit includes a temperature control body and a first temperature control part and a second temperature control part located at two ends of the temperature control body in the length direction; The first conductive element is disposed between the first temperature control unit and the first electrode post, and the second conductive element is disposed between the second temperature control unit and the second electrode post; Wherein, the dimensions of the first temperature control unit in the first direction and the second temperature control unit in the first direction are both smaller than the dimensions of the temperature control body in the first direction, and the first direction is the direction from the bottom surface to the top surface.

5. The battery pack according to claim 4, characterized in that, There is a gap between the first conductive element and the temperature control body, and there is a gap between the second conductive element and the temperature control body.

6. The battery pack according to any one of claims 4 or 5, characterized in that, The orthographic projection of the first electrode post along the first direction and the orthographic projection of the first conductive element along the first direction are both located within the orthographic projection of the first temperature control unit along the first direction. The orthographic projection of the second electrode post along the first direction and the orthographic projection of the second conductive element along the first direction are both located within the orthographic projection of the first temperature control unit along the first direction.

7. The battery pack according to any one of claims 4 to 6, characterized in that, The battery pack also includes a battery housing, and the battery housing, the cell assembly and the temperature control device are all installed in the battery housing; There are gaps between the end of the first temperature control unit away from the temperature control body and the battery box, between the end of the second temperature control unit away from the temperature control body and the battery box, between the end of the first conductive element away from the temperature control body and the battery box, and between the end of the second conductive element away from the temperature control body and the battery box.

8. The battery pack according to any one of claims 3 to 7, characterized in that, Both the first conductive element and the second conductive element are connecting plates. The battery cell assembly includes multiple battery cells connected in series. The connecting plate has multiple through holes, and each through hole corresponds to one of the battery cells.

9. The battery pack according to any one of claims 4 to 8, characterized in that, An insulating heat-conducting element is provided between the first conductive element and the first temperature control unit, and between the second conductive element and the second temperature control unit.

10. The battery pack according to any one of claims 1 to 9, characterized in that, All temperature control devices are fluid temperature control plates, each temperature control device includes a water nozzle, and the water nozzle of each temperature control device faces the side closest to the battery cell assembly. When the temperature control device heats the battery cell assembly, the fluid in the fluid temperature control plate is a heating fluid, and when the temperature control device dissipates heat from the battery cell assembly, the fluid in the fluid temperature control plate is a heat dissipation fluid.

11. The battery pack according to claim 10, characterized in that, Each of the water taps is connected to a flow control valve.

12. The battery pack according to any one of claims 10 or 11, characterized in that, The temperature control unit installed on the top surface may include multiple sub-fluid plates, with each pair of adjacent sub-fluid plates connected by a water pipe.

13. The battery pack according to any one of claims 1 to 12, characterized in that, The end faces are two opposing surfaces of the battery cell assembly along its length, and the temperature control components include a top temperature control, a bottom temperature control, and an end temperature control.

14. A battery pack, characterized in that, The battery pack includes: A battery cell assembly, the battery cell assembly including a top surface and a bottom surface disposed opposite each other, and an end surface intersecting both the top surface and the bottom surface; A temperature control component, comprising at least two temperature control elements, one of which is disposed on the top surface, the bottom surface, and the two end surfaces.

15. A vehicle, characterized in that, The vehicle includes the battery pack according to any one of claims 1 to 13 or the battery pack according to claim 14.

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