Battery pack and vehicle with same

Abstract

The utility model provides a battery pack and a vehicle with the same. The battery pack comprises a battery box, the battery box comprises a lower box body, and the lower box body is provided with an accommodating cavity; the partition plate comprises a plurality of side face partition plates, the side face partition plates extend in the containing cavity in the first preset direction, and the containing cavity is divided into a plurality of cavities by the side face partition plates; the plurality of battery modules are arranged in the cavity, and the plurality of battery modules are arranged in the cavity; and a plurality of elastic heat conduction assemblies are provided, and the plurality of elastic heat conduction assemblies are respectively arranged on at least one side wall of the cavity. According to the utility model, good contact between the battery module and the side partition plate can be maintained when the size of the battery module is changed, so that efficient heat conduction can be maintained even under an extreme working condition, and the problem that the heat conduction effectiveness between the partition plate and the battery cell cannot be ensured in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of battery pack structure technology, and more specifically, to a battery pack and a vehicle having the same. Background Technology

[0002] Thermal management of battery systems is crucial for ensuring battery safety and extending its lifespan. With advancements in battery technology, particularly the increasing demand for high energy density and high power output, the heat generated during charging and discharging has significantly increased. Traditional battery thermal management systems primarily rely on bottom cooling, placing separators at the bottom of the battery module and allowing coolant circulation to remove heat. However, battery cells undergo expansion and contraction during operation, especially at high charging and discharging rates. Bottom cooling designs often struggle to accommodate these changes, particularly when the contact surface between the cell and separator exhibits irregularities, drastically reducing the effectiveness of heat conduction.

[0003] There is currently no effective solution to the above problems. Utility Model Content

[0004] The main objective of this invention is to provide a battery pack and a vehicle having the same, in order to solve the problem in the prior art that the effectiveness of heat conduction between the separator and the battery cell cannot be guaranteed.

[0005] To achieve the above objectives, according to one aspect of the present invention, a battery pack is provided, comprising: a battery box, the battery box including a lower box body having a receiving cavity; a partition, the partition including a plurality of side partitions extending along a first preset direction and disposed within the receiving cavity, the plurality of side partitions dividing the receiving cavity into a plurality of chambers; a battery module, having a plurality of battery modules disposed within the chambers; and a plurality of elastic heat-conducting components, the plurality of elastic heat-conducting components respectively disposed on at least one side wall of the chamber.

[0006] Furthermore, at least one of the multiple side partitions and at least one of the battery compartments are provided with cooling channels.

[0007] Furthermore, the side partition includes at least one inner baffle, which extends along a first preset direction to divide the cooling channel into a side plate channel. The side plate channel has a first channel port and a second channel port. The first channel port and the second channel port are spaced apart by the inner baffle, and the flow directions of the refrigerant in the side plate channels of adjacent side partitions are opposite.

[0008] Furthermore, the battery box also includes: a connecting beam, which extends along a second preset direction and is disposed in the receiving cavity, and the connecting beam is connected to at least one side partition. The connecting beam is provided with a liquid cooling channel, and the channels of each side partition are connected through the liquid cooling channel.

[0009] Furthermore, the connecting beam includes: a first connecting beam, which is provided with a first liquid cooling channel, and the first liquid cooling channel is connected to the first channel port of each side plate channel; a second connecting beam, which is spaced apart from the first connecting beam along a third preset direction, and is provided with a second liquid cooling channel, which is connected to the second channel port of each side plate channel; wherein, the first liquid cooling channel and the second liquid cooling channel are connected to an external coolant supply device.

[0010] Furthermore, the connecting beam also includes: a first external connecting pipe, one end of which is connected to the first liquid cooling channel, and the other end of which extends out of the lower housing and is connected to the external coolant supply device; and a second external connecting pipe, one end of which is connected to the second liquid cooling channel, and the other end of which extends out of the lower housing and is connected to the external coolant supply device.

[0011] Furthermore, the battery pack also includes: a temperature sensing module, which is disposed on the battery box and includes: a first temperature sensor, having multiple first temperature sensors disposed on multiple battery modules, each first temperature sensor being used to acquire the cell temperature of each battery module; a second temperature sensor, disposed at the first external connecting pipe, which is used to acquire the coolant temperature inside the first external connecting pipe; a third temperature sensor, disposed at the second external connecting pipe, which is used to acquire the coolant temperature inside the second external connecting pipe; and a control module, disposed on the battery box and electrically connected to the battery management system, the first temperature sensor, the second temperature sensor, and the third temperature sensor, respectively, which is used to acquire the cell temperature of each battery module, the coolant temperature inside the first external connecting pipe, and the coolant temperature inside the second external connecting pipe.

[0012] Furthermore, the partition also includes: a module end plate, which extends along a second preset direction and is disposed in the receiving cavity; one end of multiple side partitions is spaced apart from the frame of the lower housing; the module end plate is screwed to one end of the multiple side partitions; and a stainless steel pull strip is embedded inside the module end plate.

[0013] Furthermore, the battery module includes: a battery cell, having multiple battery cells stacked along a first preset direction; a first insulating plate extending along a third preset direction and disposed between the battery cell and the frame of the lower housing; and a second insulating plate extending along a third preset direction and disposed between the battery cell and the module end plate.

[0014] Furthermore, the first insulating plate and the second insulating plate extend for a length of L along the third preset direction, and the side partition extends for a length of H along the third preset direction, where H < L.

[0015] Furthermore, the elastic thermal conductive component includes: an elastic thermal conductive layer extending along a first preset direction; and smooth plastic layers respectively attached to the side of the elastic thermal conductive layer near the battery module.

[0016] Furthermore, the battery box and separator are integrally extruded.

[0017] According to another aspect of the present invention, a vehicle is provided, including a battery pack, characterized in that the battery pack is the aforementioned battery pack.

[0018] By applying the technical solution of this utility model, the distance between the heat source and the cooling medium is greatly shortened by setting the side separator along the first preset direction in the receiving cavity of the battery box. This allows the heat generated by the battery module to be quickly captured and transferred away by the side separator. The elastic heat-conducting component set between the battery module and the separator can maintain good contact between the battery module and the side separator when the size of the battery module changes, ensuring efficient heat conduction even under extreme conditions. This solves the problem in the prior art that the effectiveness of heat conduction between the separator and the battery cell cannot be guaranteed. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic diagram of the structure of a first embodiment of the battery pack according to the present invention is shown;

[0021] Figure 2 It shows Figure 1 Enlarged structural diagram at point A;

[0022] Figure 3 A schematic diagram of the structure of a first embodiment of the battery box in a battery pack according to the present invention is shown;

[0023] Figure 4 A schematic diagram of the structure of a second embodiment of the battery pack according to the present invention is shown;

[0024] Figure 5 A schematic diagram of the structure of a third embodiment of the battery pack according to the present invention is shown;

[0025] Figure 6A schematic diagram of the structure of a fourth embodiment of the battery pack according to the present invention is shown;

[0026] Figure 7 A structural schematic diagram of a fifth embodiment of the battery pack according to the present invention is shown;

[0027] Figure 8 A schematic diagram of the structure of a first embodiment of the elastic thermally conductive component in a battery pack according to the present invention is shown.

[0028] The above figures include the following reference numerals:

[0029] 10. Battery box;

[0030] 11. Lower box;

[0031] 12. Receiving cavity;

[0032] 13. Connect the crossbeams;

[0033] 131. First connecting beam;

[0034] 132. Second connecting beam;

[0035] 133. First external connecting pipe;

[0036] 134. Second external connecting pipe;

[0037] 20. Partition;

[0038] 21. Side partition;

[0039] 211. Side panel flow channel;

[0040] 212. Inner baffle;

[0041] 22. Module end plate;

[0042] 23. Stainless steel tie rods;

[0043] 30. Battery module;

[0044] 31. Battery cell;

[0045] 32. First insulating board;

[0046] 33. Second insulating board;

[0047] 40. Flexible thermally conductive components;

[0048] 41. Elastic thermally conductive layer;

[0049] 42. Smooth plastic layer;

[0050] 50. Temperature sensing module;

[0051] 51. First temperature sensor;

[0052] 52. Control module. Detailed Implementation

[0053] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0054] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0055] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0056] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0057] Thermal management of battery systems is one of the key technologies in battery applications such as new energy vehicles and energy storage devices, directly affecting battery safety, efficiency, and lifespan. With the continuous advancement of battery technology, especially towards higher energy density and higher power output, effectively managing and controlling the heat generated during battery operation has become a crucial challenge.

[0058] High energy density means that a battery can store more electrical energy per unit volume or weight, revolutionizing the range of electric vehicles and the energy persistence of portable electronic devices. However, higher energy density is often accompanied by faster chemical reaction rates, resulting in more heat generation. Similarly, high power output requires the battery to release a large amount of electrical energy in a short period of time, which also leads to a sharp rise in battery temperature, as battery heat generation is directly proportional to the operating rate; the higher the rate, the more significant the heat generation.

[0059] In battery thermal management solutions, the traditional bottom cooling method is one of the most common designs. This involves installing a separator under the battery module, which contacts the coolant and utilizes the circulating flow of the coolant to dissipate the heat generated by the battery. This method performs adequately under low power and stable operating conditions, but its limitations become increasingly apparent when faced with high-rate charging and discharging.

[0060] When a battery cell is in operation, especially during high-rate charging and discharging, it undergoes a certain degree of expansion and contraction. Bottom heat dissipation designs are usually fixed and cannot adapt to these dynamic changes. In particular, when there are irregular gaps or reduced contact area between the battery cell and the separator, the effectiveness of heat conduction will be significantly reduced, making it impossible to ensure uniform heat distribution and timely dissipation.

[0061] Combination Figures 1 to 8 As shown, a battery pack is provided according to a specific embodiment of this application.

[0062] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, a battery pack includes: a battery case 10, a separator 20, battery modules 30, and elastic thermal conductive components 40. The battery case 10 includes a lower casing 11 with a receiving cavity 12. The separator 20 includes multiple side separators 21 extending along a first preset direction and disposed within the receiving cavity 12, dividing the receiving cavity 12 into multiple chambers. Multiple battery modules 30 are disposed within the chambers. Multiple elastic thermal conductive components 40 are respectively disposed on at least one side wall of each chamber. The first preset direction is the length direction from one end of the lower casing 11 to the other.

[0063] By applying the technical solution of this embodiment, by setting the side partition 21 in the receiving cavity 12 of the battery box 10 along the first preset direction, the distance from the heat source to the cooling medium is greatly shortened, so that the heat generated by the battery module 30 can be quickly captured and transferred by the partition. The elastic heat-conducting component 40 is set between the battery module 30 and the side partition 21, which can maintain good contact between the battery cell 31 in the battery module 30 and the side partition 21 when the size of the battery module 30 changes, ensuring that efficient heat conduction can be maintained even under extreme conditions.

[0064] Furthermore, in this embodiment, at least one of the multiple side partitions 21 and at least one of the battery compartments 10 are provided with cooling channels. Compared to a complex bottom heat dissipation piping system, the design of the cooling channels built into the side partitions 21 and battery compartments 10 is simpler, reducing assembly difficulty and sealing requirements, and minimizing potential leakage risks. Integrating the cooling channels into the side partitions and battery compartments reduces additional cooling components, promotes the integration of system components, reduces space occupation, and improves the system's compactness and integration.

[0065] like Figure 4 and Figure 5 As shown, the side partition 21 includes at least one inner baffle 212. The at least one inner baffle 212 extends along a first preset direction to divide the cooling channel into a side plate channel 211. The side plate channel 211 has a first channel port and a second channel port. The first channel port and the second channel port are spaced apart by the inner baffle 212. The flow directions of the refrigerant in the side plate channels 211 of adjacent side partitions 21 are arranged in opposite directions.

[0066] In one exemplary embodiment, there are multiple inner baffles 212, each with a different length designed according to the fluid flow rate. The different lengths of the inner baffles 212 can be precisely designed according to the heat generation and heat dissipation requirements of the cells in different areas of the battery pack, thereby achieving efficient fluid distribution. In high heat load areas, the inner baffles can be designed to be longer to increase the contact area and time between the coolant and the cells, improving heat dissipation efficiency; while in low heat load areas, the inner baffles can be shortened accordingly to reduce unnecessary fluid resistance and ensure uniform and efficient fluid distribution throughout the system.

[0067] In this embodiment, by setting the flow direction of the refrigerant in the side plate channels 211 on adjacent side partitions 21 to be opposite, the refrigerant flow inside the battery box can be more evenly distributed, avoiding excessive concentration of refrigerant in a certain area or premature thermal saturation. This helps to balance the temperature of the entire battery system and prevents local overheating. The addition of the inner baffle 212 not only divides the flow channels but also serves as part of the side partitions 21, enhancing their structural stability and reducing possible deformation under high or low temperature environments, thereby protecting the battery cells from external pressure or vibration. The opposite refrigerant flow direction design ensures that the refrigerant can be effectively cooled along the entire length of the battery cell, preventing the refrigerant from flowing out of the system without being fully utilized, and achieving efficient recycling of the refrigerant.

[0068] Furthermore, the battery box 10 also includes a connecting beam 13, which extends along a second preset direction and is disposed within the receiving cavity 12. The connecting beam 13 is connected to at least one side partition 21, and the connecting beam 13 is provided with a liquid cooling channel. Each of the side partition channels 211 is connected through the liquid cooling channel. The second preset direction is the width direction from one end of the lower box 11 to the other end.

[0069] By connecting the liquid-cooled channels in the crossbeam 13, a more complex and efficient heat exchange network is constructed, enabling communication with multiple side plate channels 211. The liquid-cooled channels not only promote uniform distribution of the refrigerant but also collect and redistribute heat from different side plate channels, ensuring a balanced temperature throughout the battery box. Furthermore, the crossbeam 13 not only performs heat exchange functions but its structural design also enhances the overall rigidity of the battery box. When the battery box is subjected to external impacts or vibrations, the crossbeam provides additional support, protecting the battery cells from damage and improving the system's safety and structural stability.

[0070] like Figure 6 As shown, the connecting beam 13 includes: a first connecting beam 131 and a second connecting beam 132. The first connecting beam 131 is provided with a first liquid cooling channel, which is connected to the first channel port of each side plate channel 211. The second connecting beam 132 is spaced apart from the first connecting beam 131 along a third preset direction. The second connecting beam 132 is provided with a second liquid cooling channel, which is connected to the second channel port of each side plate channel 211. The first and second liquid cooling channels are connected to an external coolant supply device. The third preset direction is the height direction from the bottom of the lower housing 11 to the port.

[0071] In this embodiment, a first liquid-cooled flow channel and a second liquid-cooled flow channel are respectively provided on the first connecting beam 131 and the second connecting beam 132. These two flow channels are connected vertically to the first and second flow channel ports of the side plate flow channel 211, ensuring vertical circulation of the coolant within the battery box. This design effectively balances the temperature at different heights within the battery box, preventing uneven cooling caused by gravity. The first and second liquid-cooled flow channels are connected to an external coolant supply device, ensuring smooth circulation of the coolant vertically. This design utilizes the principle of natural convection, promoting coolant flow and improving cooling efficiency even without a pump system.

[0072] In one exemplary embodiment, the first connecting beam 131 and the second connecting beam 132 are welded together with a plurality of side partitions 21, which allows for pressure testing during the manufacturing stage and reduces the number of liquid cooling pipe joints, thereby reducing assembly difficulty and leakage risk.

[0073] In one exemplary embodiment, the side panel flow channels 211 are symmetrical about the centerline of the side partition 21, and are interchangeable when welded to the lower housing 11 and the first connecting beam 131 and the second connecting beam 132. From a structural engineering perspective, this centerline-symmetrical flow channel design helps maintain the overall balance and stability of the battery pack. The symmetrically distributed flow channels can distribute forces more evenly under external pressure or internal thermal stress, reducing structural distortion and deformation, thereby enhancing the durability and safety of the battery pack.

[0074] Furthermore, the connecting beam 13 also includes a first external connecting pipe 133 and a second external connecting pipe 134. One end of the first external connecting pipe 133 is connected to the first liquid cooling channel, and the other end of the first external connecting pipe 133 extends out of the lower housing 11 and is connected to the external coolant supply device. One end of the second external connecting pipe 134 is connected to the second liquid cooling channel, and the other end of the second external connecting pipe 134 extends out of the lower housing 11 and is connected to the external coolant supply device. The first external connecting pipe 133 and the second external connecting pipe 134 are directly connected to the external coolant supply device, ensuring rapid exchange and replenishment of coolant. This direct connection design avoids the pressure loss and cooling efficiency reduction that may result from traditional multi-stage pipeline connections, providing a highly efficient and stable cooling cycle for the battery box.

[0075] In one exemplary embodiment, the battery pack further includes a temperature sensing module 50, which is disposed on the battery box 10. The temperature sensing module 50 includes a first temperature sensor 51, a second temperature sensor, a third temperature sensor, and a control module 52. Multiple first temperature sensors 51 are disposed on multiple battery modules 30, and each first temperature sensor 51 is used to acquire the cell temperature of each battery module 30. The second temperature sensor is disposed at a first external connecting pipe 133 and is used to acquire the coolant temperature inside the first external connecting pipe 133. The third temperature sensor is disposed at a second external connecting pipe 134 and is used to acquire the coolant temperature inside the second external connecting pipe 134. The control module 52 is disposed on the battery box 10 and is electrically connected to the battery management system, the first temperature sensor 51, the second temperature sensor, and the third temperature sensor. The control module 52 is used to acquire the cell temperature of each battery module 30, the coolant temperature inside the first external connecting pipe 133, and the coolant temperature inside the second external connecting pipe 134.

[0076] In this embodiment, multiple first temperature sensors 51 are deployed on multiple battery modules 30, enabling real-time acquisition of temperature data from the cells within each module. This distributed monitoring method ensures a comprehensive understanding of the battery pack's temperature status, facilitating early identification of abnormal temperature changes and preventing thermal runaway events. A second temperature sensor is located on the first external coolant connection pipe 133, while a third temperature sensor is located on the second external connection pipe 134; they monitor the inlet and outlet temperatures of the coolant, respectively. Based on this temperature information, the control module 52 can adjust the coolant's temperature, flow rate, and velocity in real-time to achieve optimal thermal management and maintain the battery pack within its ideal operating temperature range. The seamless connection between the control module 52 and the battery management system (BMS) allows it to intelligently adjust the cooling system parameters according to the real-time thermal status of the battery pack. This closed-loop control system can quickly respond to changes in battery temperature, ensuring the safety and performance of the battery pack.

[0077] The temperature sensing module 50 not only monitors the temperature during normal operation but also issues warning signals when abnormal temperatures occur. By comparing cell temperature with coolant temperature, the BMS can determine the efficiency of the cooling system and promptly detect and diagnose potential faults, such as coolant leaks or blockages. Through continuous monitoring of cell temperature and precise control of coolant temperature, the temperature sensing module 50 helps extend battery life and optimize battery performance. A suitable temperature range reduces thermal stress on the cells, prevents accelerated capacity decay at high temperatures, and also improves battery charging and discharging efficiency. The integrated design of the temperature sensing module 50 with the battery pack 10 reduces the number of external connection cables and sensors, simplifies the system architecture, and reduces assembly complexity and cost. Simultaneously, the centralized control module design improves the overall reliability and ease of maintenance of the system. The temperature data collected by the temperature sensing module 50 can be used to develop more advanced thermal management algorithms. Combining the battery pack's operating environment, operating status, and cell aging level, the BMS can formulate more personalized and refined cooling strategies, further improving the thermal management efficiency of the battery pack.

[0078] Furthermore, the partition 20 also includes: a module end plate 22, which extends along a second preset direction and is disposed in the receiving cavity 12; one end of a plurality of side partitions 21 is spaced apart from the frame of the lower housing 11; the module end plate 22 is screwed to one end of the plurality of side partitions 21; and a stainless steel pull strip 23 is inlaid inside the module end plate 22.

[0079] In this embodiment, the module end plate 22 extends along a second preset direction and is disposed within the receiving cavity 12 of the battery box 10, and is connected to one end of a plurality of side partitions 21 by screws. This connection method not only fixes the position of the module, but also ensures sufficient mechanical strength between the module and the partitions to resist the expansion force of the battery during operation, prevent module displacement or structural deformation, and thus maintain the structural stability of the battery pack. The stainless steel pull strip 23, as a reinforcing element, effectively disperses the load on the module end plate, especially when the battery expands, it can withstand greater tensile and compressive forces, avoiding deformation or damage to the end plate, and further ensuring the stability and safety of the battery module. The use of screw connections makes the assembly process of the module end plate 22 and the side partitions 21 simple and quick.

[0080] In an exemplary embodiment, the length of the side partition 21 extending along the third preset direction is greater than the length of the module end plate 22 extending along the third preset direction, so as to eliminate the assembly problem of the battery module 30 caused by the length deviation of the battery module 30, and at the same time prevent the first connecting beam 131 and the second connecting beam 132 from being deformed under pressure, which would affect the pipeline sealing.

[0081] In an exemplary embodiment, the battery module 30 includes: a battery cell 31, a first insulating plate 32, and a second insulating plate 33. Multiple battery cells 31 are stacked along a first preset direction. The first insulating plate 32 extends along a third preset direction and is disposed between the battery cell 31 and the frame of the lower housing 11. The second insulating plate 33 extends along the third preset direction and is disposed between the battery cell 31 and the module end plate 22. The first insulating plate 32, extending along the third preset direction and located between the battery cell 31 and the frame of the lower housing 11, serves as an insulating layer between the battery cell and the housing, preventing direct contact between the battery cell and the metal housing and avoiding the risk of short circuits. Furthermore, the first insulating plate can buffer vibrations during battery cell operation, protecting the battery cell from mechanical damage. The second insulating plate 33 also extends along the third preset direction but is positioned between the battery cell 31 and the module end plate 22. It not only provides insulation between the battery cell and the end plate but also supports the battery cell, helping to maintain the neat arrangement and structural stability of the battery cells. In terms of thermal management, the insulating plate can prevent the direct conduction of heat energy, which helps to control the temperature distribution inside the battery module and avoid local overheating.

[0082] like Figure 7 As shown, the first insulating plate 32 and the second insulating plate 33 both extend for a length of L along a third preset direction, and the side separator 21 extends for a length of H along the third preset direction, where H < L. The longer insulating plates not only provide electrical isolation but also increase the mechanical stability of the battery pack. The L-length design of the first insulating plate 32 and the second insulating plate 33 better supports the battery cells, reduces cell movement and deformation under vibration or impact conditions, and protects the battery from mechanical damage. Since the length H of the side separator 21 is less than L, this means there will be additional insulating plate coverage areas at the top and bottom of the battery cells. These additional insulating plate areas can reduce heat conduction between the battery cells and the casing or end plates, helping to control the temperature of the battery cells and prevent extreme temperature changes from affecting cell performance and lifespan.

[0083] In one exemplary embodiment, the thicknesses of the first insulating plate 32 and the second insulating plate 33 are adjustable. By adjusting the thickness, the inconsistency in module length caused by uneven thickness of the battery cell 31 is corrected, ensuring a tight fit between the module and the side liquid cooling plate. Simultaneously, bolt tightening can appropriately apply a certain pre-pressure to the battery cell 31 inside the module. The insulating plates not only compensate for differences in battery cell thickness but also provide a certain pre-pressure to the battery cell inside the module when the bolts are tightened. This pre-pressure contributes to the stability of the battery cell under long-term operation and temperature changes, prevents poor contact caused by expansion or contraction of the battery cell, and promotes heat exchange between the battery cell and the liquid cooling plate, keeping the battery cell within its optimal operating temperature range.

[0084] like Figure 8As shown, the elastic thermal conductive component 40 includes an elastic thermal conductive layer 41 and a smooth plastic layer 42. The elastic thermal conductive layer 41 extends along a first preset direction, and the smooth plastic layer 42 is respectively attached to the side of the elastic thermal conductive layer 41 near the battery module 30.

[0085] In this embodiment, the elastic thermally conductive layer 41 extends along a first preset direction, ensuring sufficient contact between it and the side of the battery cell 31 and the liquid cooling plate, maintaining good thermal contact even when the battery cell expands or contracts. This design utilizes the properties of the elastic thermally conductive layer to effectively absorb the heat generated during battery cell operation and quickly conduct it to the liquid cooling plate, where it is dissipated through the circulation of the coolant, thereby maintaining the battery temperature within a safe and optimized operating range. The smooth plastic layer 42 is attached to the side of the elastic thermally conductive layer 41 closest to the battery module 30, not only reducing the frictional resistance of the battery cell during assembly, allowing for smooth contact between the battery cell and the elastic thermally conductive layer, but also providing an extra layer of protection for the battery cell. This protection is particularly critical when the battery cell expands or contracts; the smooth plastic layer reduces direct friction between the battery cell and the thermally conductive layer, preventing wear on the battery cell casing and buffering the pressure generated by battery cell expansion, reducing direct impact on the liquid cooling plate. The use of the elastic thermally conductive layer can effectively disperse the thermal stress generated during battery cell operation. Because the contact surface between the concentrated heat points of the battery cell (such as near the tabs) and the liquid cooling plate is connected by an elastic thermal conductive layer, the heat can be distributed more evenly, avoiding local overheating and improving the uniformity and efficiency of thermal management.

[0086] In one exemplary embodiment, the battery box 10 and the separator 20 are integrally extruded. This integral extrusion process ensures a seamless connection between the battery box 10 and the separator 20. This integrated design significantly enhances the structural strength of the entire battery pack, providing better protection, especially under external impact or vibration, reducing battery cell displacement, and increasing the stability of the battery system. Integral extrusion eliminates the connection joints between the battery box and the separator, thereby reducing potential leakage points, improving the sealing of the cooling system, effectively reducing liquid cooling pipe joints, shortening assembly time, and lowering processing difficulty and the risk of pipe leakage.

[0087] According to another specific embodiment of this application, a vehicle is also provided, including a battery pack, which is the battery pack described in the above embodiments. Because the battery pack employs a highly efficient thermal management system, it can quickly dissipate heat and keep the battery within its optimal operating temperature range. This helps improve the battery's charging and discharging efficiency, thereby enhancing the vehicle's power output and energy utilization efficiency. The optimized design and improved thermal management efficiency of the battery pack can effectively reduce battery energy waste, especially under high-power output conditions, where more precise temperature control helps extend the driving range per charge. The high integration design and excellent thermal management capabilities of the battery pack help improve the vehicle's power performance and smoothness, reducing power output instability caused by battery temperature fluctuations. Furthermore, a lighter battery pack weight can also improve the vehicle's handling and comfort.

[0088] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0089] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this utility model.

[0090] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0091] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery pack, characterized in that, include: A battery box (10) includes a lower box (11) having a receiving cavity (12); The partition (20) includes a plurality of side partitions (21), which extend along a first preset direction and are disposed in the receiving cavity (12), and the plurality of side partitions (21) divide the receiving cavity (12) into a plurality of chambers; A battery module (30), wherein there are multiple battery modules (30), and multiple battery modules (30) are disposed in the cavity; An elastic thermal conductive component (40) is provided, and multiple elastic thermal conductive components (40) are respectively disposed on at least one side wall of the chamber.

2. The battery pack according to claim 1, characterized in that, At least one of the plurality of side partitions (21) and at least one of the battery boxes (10) are provided with cooling channels.

3. The battery pack according to claim 2, characterized in that, The side partition (21) includes at least one inner baffle (212), which extends along a first preset direction to divide the cooling channel into a side plate channel (211). The side plate channel (211) has a first channel port and a second channel port. The first channel port and the second channel port are spaced apart by the inner baffle (212). The flow directions of the refrigerant in the side plate channels (211) on adjacent side partitions (21) are opposite.

4. The battery pack according to claim 3, characterized in that, The battery box (10) also includes: A connecting beam (13) is provided, which extends along a second preset direction and is disposed in the receiving cavity (12). The connecting beam (13) is connected to at least one of the side partitions (21). The connecting beam (13) is provided with a liquid cooling channel, and each of the side partition channels (211) is connected through the liquid cooling channel.

5. The battery pack according to claim 4, characterized in that, The connecting beam (13) includes: The first connecting beam (131) is provided with a first liquid cooling channel, which is connected to the first channel port of each of the side plate channels (211). The second connecting beam (132) is spaced apart from the first connecting beam (131) along a third preset direction. The second connecting beam (132) is provided with a second liquid cooling channel, which is connected to the second channel port of each of the side plate channels (211). The first liquid cooling channel and the second liquid cooling channel are respectively connected to an external coolant supply device.

6. The battery pack according to claim 5, characterized in that, The connecting beam (13) also includes: The first external connecting pipe (133) has one end connected to the first liquid cooling channel and the other end of the first external connecting pipe (133) passes through the lower box (11) and is connected to the external coolant supply device. The second external connecting pipe (134) has one end connected to the second liquid cooling channel and the other end extending out of the lower housing (11) and connected to the external coolant supply device.

7. The battery pack according to claim 6, characterized in that, The battery pack also includes: A temperature sensing module (50) is disposed on the battery box (10), and the temperature sensing module (50) includes: A first temperature sensor (51) is provided, and multiple first temperature sensors (51) are disposed on multiple battery modules (30). Each first temperature sensor (51) is used to obtain the cell temperature of each battery module (30). The second temperature sensor is disposed at the first external connecting pipe (133) and is used to obtain the temperature of the coolant inside the first external connecting pipe (133). The third temperature sensor is disposed at the second external connecting pipe (134), and the second temperature sensor is used to obtain the temperature of the coolant inside the second external connecting pipe (134). The control module (52) is disposed on the battery box (10). The control module (52) is electrically connected to the battery management system, the first temperature sensor (51), the second temperature sensor and the third temperature sensor respectively. The control module (52) is used to obtain the cell temperature of each battery module (30), the coolant temperature in the first external connecting pipe (133) and the coolant temperature in the second external connecting pipe (134).

8. The battery pack according to claim 7, characterized in that, The partition (20) also includes: The module end plate (22) extends along a second preset direction and is disposed in the receiving cavity (12). One end of the plurality of side partitions (21) is spaced apart from the frame of the lower box (11). The module end plate (22) is screwed to one end of the plurality of side partitions (21). The module end plate (22) is inlaid with a stainless steel pull strip (23).

9. The battery pack according to claim 8, characterized in that, The battery module (30) includes: A battery cell (31), wherein there are multiple battery cells (31), and the multiple battery cells (31) are stacked along the first preset direction; The first insulating plate (32) extends along a third preset direction and is disposed between the battery cell (31) and the frame of the lower housing (11). The second insulating plate (33) extends along the third preset direction and is disposed between the battery cell (31) and the module end plate (22).

10. The battery pack according to claim 9, characterized in that, The first insulating plate (32) and the second insulating plate (33) extend along the third preset direction for a length of L, and the side partition (21) extends along the third preset direction for a length of H, where H < L.

11. The battery pack according to claim 1, characterized in that, The elastic thermally conductive component (40) includes: An elastic thermally conductive layer (41) is provided, which extends along a first preset direction; A smooth plastic layer (42) is attached to the side of the elastic thermally conductive layer (41) near the battery module (30).

12. The battery pack according to claim 1, characterized in that, The battery box (10) and the partition (20) are integrally extruded.

13. A vehicle comprising a battery pack, characterized in that, The battery pack is the battery pack according to any one of claims 1 to 12.

Images