Battery pack and vehicle

Abstract

The application relates to the technical field of batteries, and provides a battery pack and a vehicle. Thus, according to the battery pack provided by the application, on one hand, liquid cooling plates are arranged in pairs, the battery module can be attached and heat-exchanged from two sides of the battery module, compared with the single-side heat exchange in the prior art, the heat exchange efficiency can be improved, and the temperature uniformity of the battery module can be realized; on the other hand, the liquid cooling plates arranged in pairs can be close to and far away from each other, so that the battery module can be clamped and released, and compared with the prior art, the liquid cooling plates and the battery module are no longer fixedly assembled, the liquid cooling plates arranged in pairs are clamped in a movable mode, even if the size of the battery module is different, the movable clamping of the liquid cooling plates can be used for adaptation, meanwhile, assembly tolerances can be compensated, the battery module can be positioned, and the liquid cooling plates and the battery module are prevented from being in poor contact, and the heat dissipation consistency is prevented from being affected.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery pack and a vehicle. Background Technology

[0002] In recent years, with the rapid development of new energy vehicles and energy storage systems, lithium-ion power batteries have been widely used due to their advantages such as high energy density and long cycle life. However, power batteries generate a large amount of heat during high-rate charging and discharging. If this heat cannot be dissipated in time, it will cause problems such as excessive cell temperature rise and excessive temperature difference, leading to thermal runaway, capacity decay, and even safety accidents. Therefore, an efficient and reliable battery thermal management system has become a key element in ensuring the safety and performance of battery packs. Liquid cooling technology, due to its high heat exchange efficiency and good temperature uniformity, has gradually become the mainstream cooling solution for medium and high-power power batteries.

[0003] Existing liquid cooling solutions mostly employ liquid cooling plates placed at the bottom or side of the battery module, with heat being removed through coolant circulation. However, this type of structure still has the following shortcomings in practical applications: Firstly, the contact between the liquid cooling plate and the battery cell is often surface or line contact, with a limited contact area, making it difficult to further improve heat exchange efficiency; secondly, the liquid cooling plate and battery module are mostly fixedly assembled, making it difficult to adapt to the size differences of batteries of different specifications, and assembly tolerances can easily cause poor contact, affecting the consistency of heat dissipation. Summary of the Invention

[0004] In view of this, this application provides a battery pack and a vehicle, with the aim of solving the above-mentioned technical problems to a certain extent.

[0005] A first aspect of this application provides a battery pack, the battery pack comprising:

[0006] A battery module, wherein the battery module comprises multiple individual battery cells;

[0007] A liquid cooling mechanism, comprising a pair of liquid cooling plates arranged in abutting each other in a first horizontal direction, the pair of liquid cooling plates clamping the battery module;

[0008] The paired liquid cooling plates can move closer to each other and further apart in the first horizontal direction, and the cooling medium circulates inside the liquid cooling plates.

[0009] Based on the above technical solutions, optionally, the battery module includes two first sides opposite each other in a first horizontal direction and two second sides opposite each other in a second horizontal direction;

[0010] Each of the liquid cooling plates is attached to the outer side of a portion of the first side, a portion of the second side, and a portion of the other second side.

[0011] Based on the above technical solutions, optionally, the battery pack further includes a battery box, the battery box includes a cavity, and the battery module is disposed in the cavity;

[0012] The liquid cooling mechanism further includes a pump assembly and a cooling medium storage section. The cooling medium storage section is disposed in the cavity and is used to store the cooling medium. The pump assembly is connected to the cooling medium storage section and to the paired liquid cooling plates to circulate the cooling medium into the interior of the liquid cooling plates.

[0013] Based on the above technical solutions, optionally, the liquid cooling mechanism further includes a heat dissipation mechanism, the heat dissipation mechanism includes a heat-conducting component disposed in the cooling medium storage section, and the heat dissipation mechanism further includes a heat dissipation component disposed in the battery box, the heat dissipation component being used to exchange heat with the heat-conducting component.

[0014] Based on the above technical solutions, optionally, the pump assembly is disposed on the outside of the battery box.

[0015] Based on the above technical solutions, optionally, the battery pack includes a central partition that divides the cavity into a first cavity and a second cavity. The battery module is disposed in the first cavity, and the cooling medium storage section includes the second cavity. The second cavity is filled with the cooling medium, and the cooling medium in the second cavity can exchange heat with the battery module.

[0016] Based on the above technical solutions, optionally, the liquid cooling mechanism further includes a heat dissipation mechanism, the heat dissipation mechanism includes a heat-conducting component disposed in the second cavity, and the heat dissipation mechanism further includes a heat dissipation component disposed in the battery box, the heat dissipation component being used to exchange heat with the heat-conducting component.

[0017] Based on the above technical solutions, optionally, the number of battery modules is multiple, the number of pairs of liquid cooling plates is the same as the number of battery modules, and each pair of liquid cooling plates corresponds to one battery module.

[0018] The battery pack includes paired liquid cooling plates that move synchronously.

[0019] Based on the above technical solutions, optionally, the battery pack further includes a battery box, the battery box includes a box body and a cover plate covering the battery box, the battery pack further includes a plug and a slot, the plug is disposed on the cover plate, the slot is disposed on the battery box, and the plug is inserted into the slot;

[0020] The battery pack also includes a latch that detachably locks the cover and the main body of the casing.

[0021] According to a second aspect of this application, a vehicle is provided, the vehicle including the battery pack described above.

[0022] Thus, according to the battery pack provided in this application, on the one hand, the paired liquid cooling plates can achieve heat exchange between the battery module from both sides. Compared with the single-sided heat exchange in the prior art, this is beneficial to improving heat exchange efficiency and achieving temperature uniformity of the battery module. On the other hand, the paired liquid cooling plates can move closer and further away, thereby clamping and releasing the battery module. In this way, compared with the prior art, the liquid cooling plates and the battery module are no longer fixedly assembled. Through the movable clamping of the paired liquid cooling plates, even if there are differences in the size of the battery module, it can be adapted by the movable clamping of the liquid cooling plates. At the same time, it can also compensate for assembly tolerances, thereby achieving the positioning of the battery module and avoiding poor contact between the liquid cooling plates and the battery module, thus avoiding affecting the heat dissipation consistency.

[0023] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram showing a three-dimensional view of a battery pack provided according to an embodiment of this application is provided;

[0026] Figure 2 A schematic diagram showing a three-dimensional view of a battery pack with an omitted cover according to an embodiment of this application is provided;

[0027] Figure 3 A schematic diagram of a heat-conducting component and a heat-dissipating component of a battery pack according to an embodiment of this application is shown;

[0028] Figure 4 A schematic diagram showing a three-dimensional view of a pair of liquid cooling plates arranged in a battery pack according to an embodiment of this application is provided;

[0029] Figure 5 A schematic diagram showing a three-dimensional view of a liquid cooling plate drive structure for a battery pack according to an embodiment of this application is provided;

[0030] Figure 6 A schematic diagram of a three-dimensional view of a pump assembly and piping for a battery pack according to an embodiment of this application is shown;

[0031] Figure 7 A schematic diagram of another three-dimensional view of a battery pack provided according to an embodiment of this application is shown.

[0032] Figure label:

[0033] 1-Battery box; 2-Central partition; 3-Power battery pack; 4-C-shaped heat exchange plate; 5-Mounting box; 6-Threaded rod; 7-Connecting rod; 8-Slide groove; 9-Worm gear; 10-Worm wheel; 11-Turntable; 12-Protective shell; 13-Semiconductor cooling chip; 14-Heat dissipation fins; 15-Cooling plate; 16-Heat dissipation fan; 17-First pump body; 18-First connecting pipe; 19-Liquid extraction pipe; 20-Second pump body; 21-Second connecting pipe; 22-Guide pipe; 23-Pre-mark frame; 24-Cover plate; 25-Insertion block; 26-Alignment seat; 27-Latch lock; 28-Return pipe. Detailed Implementation

[0034] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] 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.

[0037] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0038] According to a first aspect of the embodiments of this application, a battery pack is provided, which will be described below in conjunction with... Figures 1 to 7 Describe in detail the structure and working principle of the battery pack.

[0039] According to the embodiments of this application, the battery pack includes a battery module and a liquid cooling mechanism.

[0040] In this embodiment, the battery module includes multiple individual batteries; the liquid cooling mechanism includes a pair of liquid cooling plates that abut against each other in a first horizontal direction and clamp the battery module.

[0041] In the embodiment, the paired liquid cooling plates can move closer to each other and further apart in the first horizontal direction, and the cooling medium circulates inside the liquid cooling plates.

[0042] Thus, according to the battery pack provided in the embodiments of this application, on the one hand, the paired liquid cooling plates can be used to heat the battery module from both sides. Compared with the single-sided heat exchange in the prior art, this is beneficial to improving heat exchange efficiency and achieving temperature uniformity of the battery module. On the other hand, the paired liquid cooling plates can move closer and further away, thereby clamping and releasing the battery module. In this way, compared with the prior art, the liquid cooling plates and the battery module are no longer fixedly assembled. Through the movable clamping of the paired liquid cooling plates, even if there are differences in the size of the battery module, it can be adapted by the movable clamping of the liquid cooling plates. At the same time, it can also compensate for assembly tolerances, thereby achieving the positioning of the battery module and avoiding poor contact between the liquid cooling plates and the battery module, thus avoiding affecting the heat dissipation consistency.

[0043] According to the battery pack provided in the embodiments of this application, the battery module includes two first sides opposite each other in a first horizontal direction and two second sides opposite each other in a second horizontal direction. The two horizontal directions can be perpendicular, for example, the first horizontal direction is the left-right direction and the second horizontal direction is the front-back direction.

[0044] In this embodiment, each liquid cooling plate is attached to the outer sides of a first side portion, a second side portion, and another second side portion. That is, each liquid cooling plate can be attached to three sides, making the liquid cooling plate "C" shaped, i.e., the liquid cooling plate is essentially a C-shaped heat exchange plate, increasing the coverage area of ​​the battery module.

[0045] According to the battery pack provided in the embodiments of this application, the battery pack further includes a battery box, which includes a cavity, and the battery module is disposed in the cavity.

[0046] In an embodiment, the liquid cooling mechanism may further include a pump assembly and a cooling medium. The cooling medium storage section is disposed in the cavity and is used to store the cooling medium. The pump assembly is connected to the cooling medium storage section and to a pair of liquid cooling plates to circulate the cooling medium into the interior of the liquid cooling plates, thereby ensuring continuous heat exchange of the battery module.

[0047] In an embodiment, as an example, the pump assembly may include a first pump body and a second pump body, which may be used to pump coolant to the liquid cooling plate and to receive coolant from the cooling medium, respectively.

[0048] According to the battery pack provided in the embodiments of this application, the liquid cooling mechanism may further include a heat dissipation mechanism. The heat dissipation mechanism may include a heat-conducting component disposed in the cooling medium storage section. The heat dissipation mechanism may also include a heat dissipation component disposed in the battery box. The heat dissipation component is used to exchange heat with the heat-conducting component, thereby ensuring that the cooling medium is always pumped into the liquid cooling plate at a lower temperature.

[0049] In the embodiments, the heat-conducting components may include, for example, a cold-conducting plate, and the heat dissipation components may include a thermoelectric cooler, heat dissipation fins, and a heat dissipation fan, the specific connection relationships of which will be described later.

[0050] According to the battery pack provided in the embodiments of this application, the pump assembly is located on the outside of the battery box, so as not to occupy the space inside the box, which is beneficial to increasing the installation volume of the battery module and the capacity of the cooling medium. In addition, as an example, the battery module can be referred to as a power battery pack.

[0051] According to the battery pack provided in the embodiments of this application, the battery pack may include a central partition, which divides the cavity into a first cavity and a second cavity (i.e., upper and lower cavities). The battery module is disposed in the first cavity, and the cooling medium storage part includes a second cavity. The second cavity is filled with a cooling medium, and the cooling medium in the second cavity can exchange heat with the battery module, thereby further increasing the heat exchange and cooling area of ​​the battery module.

[0052] As an example, the above-mentioned cold-conducting plate can be placed in the heat-conducting components within the second cavity.

[0053] According to the battery pack provided in the embodiments of this application, there are multiple battery modules, such as three. The number of pairs of liquid cooling plates is the same as the number of battery modules, such as three pairs, and each pair of liquid cooling plates corresponds to one battery module.

[0054] According to the battery pack provided in the embodiments of this application, the battery pack includes paired liquid cooling plates, that is, the three pairs of liquid cooling plates mentioned above, which can move synchronously, for example, through a unified linear drive structure, which will be explained in the following description.

[0055] According to the battery pack provided in the embodiments of this application, the battery pack further includes a battery box, which includes a box body and a cover plate disposed on the battery box. The battery pack also includes a connector and a slot, with the connector disposed on the cover plate and the slot plate disposed on the battery box. The connector is inserted into the slot, thereby enabling the pre-positioning of the cover plate and the box body. The battery pack may also include a latch, which detachably locks the cover plate and the box body to improve connection reliability and facilitate maintenance.

[0056] Based on the battery pack provided in the embodiments of this application, the following will provide a more specific example of the battery pack based on the above description. A central partition 2 is fixedly connected to the inner wall of the battery box 1. A power battery pack 3 is placed on the top surface of the central partition 2. A C-shaped heat exchange plate 4 is attached to the surface of the power battery pack 3. The C-shaped heat exchange plate 4 has a hollow structure and is filled with coolant. A drive mechanism for controlling the movement of the C-shaped heat exchange plate 4 is provided on the top surface of the central partition 2.

[0057] According to the battery pack provided in the embodiments of this application, the lower part of the central partition 2 and the inner wall of the battery box 1 together form a storage cavity, i.e., a second cavity, in which coolant is stored. A cooling component for cooling the coolant in the storage cavity is fixedly installed on the left side of the battery box 1, and a circulation mechanism for controlling the circulation flow of coolant inside the C-shaped heat exchange plate 4 and coolant in the storage cavity is fixedly installed on the right side of the battery box 1.

[0058] According to the battery pack provided in the embodiments of this application, a cover plate 24 is pressed onto the top surface of the battery box 1, and a positioning component for limiting the cover plate 24 is provided on the surface of the battery box 1. A pre-marking frame 23 is provided on the top surface of the central partition 2, for example, the pre-marking frame 23 can be set by drawing colored lines.

[0059] According to the battery pack provided in the embodiments of this application, the power battery pack 3 is initially placed on the top surface of the central partition 2 by aligning the pre-marked frame 23. Then, the C-shaped heat exchange plate 4 is moved by the abutment component so that it can fit against the surface of the power battery pack 3 and clamp and fix the power battery pack 3. Then, the cover plate 24 can be fixed to the top of the battery box 1 by the positioning component, thereby forming a relatively sealed environment to protect the power battery pack 3. The surface of the battery box 1 can be reserved with connection cables to facilitate the wiring connection of the power battery pack 3.

[0060] According to the battery pack provided in the embodiments of this application, during the operation of the power battery pack 3, the coolant inside the C-shaped heat exchange plate 4 can absorb the heat generated by the operation of the power battery pack 3, and the cooling component can continuously cool the coolant inside the storage cavity. After the power battery pack 3 has been running for a period of time, the coolant inside the C-shaped heat exchange plate 4 will heat up, and then the circulation mechanism can send the low-temperature coolant inside the storage cavity into the C-shaped heat exchange plate 4, so that the C-shaped heat exchange plate 4 maintains a low temperature and continuously cools the power battery pack 3 with liquid cooling.

[0061] According to the battery pack provided in the embodiments of this application, the drive mechanism includes a mounting box 5, and the mounting box 5 is fixedly connected to the top surface of the central partition 2. A threaded rod 6 is rotatably connected to the inner wall of the mounting box 5. Multiple sets of threads are opened on the surface of the threaded rod 6. Multiple connecting rods 7 are threadedly connected to the surface of the threaded rod 6. The end of the connecting rod 7 is fixedly connected to the C-shaped heat exchange plate 4. A sliding groove 8 is opened through the front of the mounting box 5, and the inner wall of the sliding groove 8 is slidably connected to the surface of the connecting rod 7.

[0062] According to the battery pack provided in the embodiments of this application, the drive mechanism further includes an adjustment component for controlling the rotation of the threaded rod 6. The adjustment component controls the rotation of the threaded rod 6. Under the action of the thread, the threaded rod 6 will drive the connecting rod 7 to slide along the inner wall of the slide groove 8, thereby pushing the C-shaped heat exchange plate 4 to move. This allows the C-shaped heat exchange plate 4 to fit against the surface of the power battery pack 3, facilitating the absorption of heat generated on the surface of the power battery pack 3. Simultaneously, the C-shaped heat exchange plate 4 also serves to fix the power battery pack 3, ensuring its stability.

[0063] According to the battery pack provided in the embodiments of this application, the adjusting assembly includes a worm gear 9, which is rotatably connected to the mounting box 5. A turntable 11 is fixedly connected to the top of the worm gear 9, and a worm wheel 10 is fixedly sleeved on the middle of the threaded rod 6, with the worm wheel 10 meshing with the worm gear 9. By rotating the turntable 11, the worm gear 9 can be driven to rotate, which in turn drives the worm wheel 10 meshing with it to rotate, thereby driving the threaded rod 6 coaxial with it to rotate.

[0064] According to the battery pack provided in this application embodiment, a thermoelectric cooler 13 is fixedly installed on the left side of the battery box 1. A heat dissipation fin 14 is fixedly connected to the hot end of the thermoelectric cooler 13. A protective shell 12 is fixedly connected to the left side of the battery box 1, and both the thermoelectric cooler 13 and the heat dissipation fin 14 are located inside the protective shell 12. A cooling fan 16 is provided on the left side of the protective shell 12, and a cold-conducting plate 15 is fixedly connected to the cold end of the thermoelectric cooler 13. The cold-conducting plate 15 is located in the storage cavity below the central partition 2.

[0065] According to the battery pack provided in the embodiments of this application, the temperature of the cold end of the semiconductor cooling chip 13 can be continuously reduced by its operation. Combined with the heat conduction effect of the cold plate 15, the coolant inside the storage cavity is cooled down. The heat generated by the operation of the semiconductor cooling chip 13 is dissipated through the heat dissipation fins 14. At the same time, the heat dissipation fan 16 can quickly conduct the heat from the surface of the heat dissipation fins 14, thereby enhancing the heat dissipation effect.

[0066] According to the battery pack provided in the embodiments of this application, the circulation mechanism includes a first pump body 17 and a second pump body 20, and both the first pump body 17 and the second pump body 20 are fixedly installed on the right side of the battery box 1. The liquid inlet end of the first pump body 17 is fixedly connected to a liquid extraction pipe 19, and the liquid extraction pipe 19 is connected to the inside of the storage cavity. The liquid outlet end of the first pump body 17 is fixedly connected to a first connecting pipe 18. The liquid inlet end of the second pump body 20 is fixedly connected to a return pipe 28, and the return pipe 28 is connected to the storage cavity. The liquid outlet end of the second pump body 20 is fixedly connected to a second connecting pipe 21. A guide pipe 22 is fixedly connected between the second connecting pipe 21 and the C-shaped heat exchange plate 4, and between the first connecting pipe 18 and the C-shaped heat exchange plate 4. The guide pipe 22 is made of flexible material.

[0067] According to the battery pack provided in the embodiments of this application, the first pump body 17 operates and, in conjunction with the liquid extraction pipe 19, can extract the low-temperature coolant inside the storage cavity. Through the first connecting pipe 18 and the guide pipe 22, the low-temperature coolant can be sent into the interior of the C-shaped heat exchange plate 4. Through the second pump body 20 operates and, in conjunction with the guide pipe 22 and the second connecting pipe 21, can extract the coolant that has absorbed heat inside the C-shaped heat exchange plate 4 and send it into the interior of the C-shaped heat exchange plate 4 through the return pipe 28, thereby realizing the circulation of coolant and keeping the coolant inside the C-shaped heat exchange plate 4 at a low temperature.

[0068] According to the battery pack provided in the embodiments of this application, the positioning component includes a plug-in component formed as a plug 25, which is fixedly connected to the cover plate 24. Alignment seats 26, formed as slot components, are fixedly connected to both the front and back of the battery box 1, and the inner wall of the alignment seat 26 is movably inserted into the plug 25. A latch lock 27 is also provided between the cover plate 24 and the battery box 1. When installing the cover plate 24, the plug 25 is aligned with the alignment seat 26 and inserted to initially limit the position of the cover plate 24. Then, the cover plate 24 is effectively fixed by the two latch locks 27 provided at the front and rear.

[0069] According to the battery pack provided in this application embodiment, the C-shaped heat exchange plate 4 has a hollow cavity filled with coolant. It efficiently absorbs the heat generated by the power battery pack 3 through the high specific heat capacity of the liquid. Its C-shaped design can wrap around the surface of the battery pack, such as the side or end face, increasing the contact area and improving heat transfer efficiency. A drive mechanism moves the C-shaped heat exchange plate, ensuring it fits tightly against the surface of the battery pack, thus providing both physical fixation and thermal contact.

[0070] According to the battery pack provided in the embodiments of this application, the threaded rod 6 has multiple sets of threads on its surface, connecting multiple connecting rods 7. The connecting rods are driven to move linearly along the slide groove 8 by rotation, achieving synchronous advancement or retraction of the C-shaped heat exchange plates. The worm gear 9 meshes with the worm wheel 10 for transmission. The rotation of the threaded rod is controlled by manually rotating the turntable 11, possessing a self-locking characteristic to prevent loosening due to battery vibration. Multi-directional synchronous adjustment is achieved: a single threaded rod drives multiple connecting rods, ensuring that multiple C-shaped heat exchange plates operate synchronously and apply uniform pressure to the battery pack.

[0071] According to the battery pack provided in the embodiments of this application, the semiconductor cooling chip 13: its cold end directly contacts the coolant in the storage cavity through the cold conduction plate 15 to achieve rapid cooling; the hot end is cooled by forced airflow through the heat dissipation fins 14 and the heat dissipation fan 16. An integrated heat dissipation module is realized: the semiconductor cooling chip, heat dissipation fins and heat dissipation fan are centrally arranged inside the protective shell 12, reducing the external space occupation, and the opening design of the protective shell optimizes the airflow channel.

[0072] According to the battery pack provided in the embodiments of this application, a pre-marking frame is provided on the top surface of the central partition 2 to assist the power battery pack 3 in quickly aligning the installation position and avoiding errors caused by manual adjustment. The plug 25 and alignment seat 26: the plug-in design achieves initial positioning of the cover plate and prevents misalignment. The latch lock 27: the double-sided latch lock provides rigid fixation, ensuring that the cover plate and battery box 1 are pressed and sealed, forming a dustproof and moisture-proof sealed environment.

[0073] The battery pack provided according to the embodiments of this application has the following advantages:

[0074] 1. High-efficiency heat dissipation and temperature uniformity

[0075] The C-shaped heat exchange plate 4 is closely attached to the surface of the power battery pack 3, and combined with the rapid heat exchange of the internal coolant, the heat dissipation efficiency is significantly improved, avoiding local overheating; the dual-pump circulation system, with the first pump body 17 and the second pump body 20 continuously delivering low-temperature coolant, ensures that the temperature of the power battery pack 3 is uniform and stable, and extends battery life.

[0076] 2. Stable structure and easy installation

[0077] The drive mechanism threaded rod 6, connecting rod 7, worm gear 10, and worm 9 adopt a worm gear transmission and threaded rod linkage design, which can not only accurately adjust the clamping force of the C-shaped heat exchange plate 4, but also has a self-locking function to prevent the battery from loosening due to vibration; the pre-marked frame 23, plug-in cover plate 24, plug block 25, and alignment seat 26 are designed to simplify the installation process and improve assembly efficiency.

[0078] 3. Energy-saving and low-noise operation

[0079] The semiconductor cooling chip 13 directly cools the coolant, resulting in lower energy consumption compared to traditional compressor cooling solutions. The combination of the cooling fan 16 and the heat sink fins 14 optimizes the heat dissipation airflow, reduces the fan speed requirement, and lowers system operating noise.

[0080] 4. Modular design and easy maintenance

[0081] The split design with a removable cover plate 24, external first pump body 17, second pump body 20 and flexible guide pipe 22 facilitates coolant replacement, maintenance of the first and second pump bodies or C-shaped heat exchange plate 4; the storage chamber and circulation system are independently laid out to avoid interference from internal components and reduce maintenance costs.

[0082] According to a second aspect of the embodiments of this application, a vehicle is provided, which includes the battery pack as described above. The vehicle may be, for example, a bus, and also has the above-described beneficial effects, which will not be repeated here.

[0083] The above are merely preferred embodiments of this application and do not limit the scope of protection of this application. Any equivalent structural transformations made based on the innovative concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A battery pack, characterized in that, The battery pack includes: A battery module, wherein the battery module comprises multiple individual battery cells; A liquid cooling mechanism, comprising a pair of liquid cooling plates arranged in abutting each other in a first horizontal direction, the pair of liquid cooling plates clamping the battery module; The paired liquid cooling plates can move closer to each other and further apart in the first horizontal direction, and the cooling medium circulates inside the liquid cooling plates. The battery pack also includes a battery box, which includes a cavity, and the battery module is disposed within the cavity; The liquid cooling mechanism further includes a pump assembly and a cooling medium storage section. The cooling medium storage section is disposed in the cavity and is used to store the cooling medium. The pump assembly is connected to the cooling medium storage section and to the paired liquid cooling plates to circulate the cooling medium into the interior of the liquid cooling plates. The battery pack includes a central partition that divides the cavity into a first cavity and a second cavity. The battery module is disposed in the first cavity. The cooling medium storage section includes the second cavity, which is filled with the cooling medium. The cooling medium in the second cavity is capable of exchanging heat with the battery module. The liquid cooling mechanism further includes a heat dissipation mechanism, which includes a heat-conducting component disposed in the second cavity, and a heat dissipation member for exchanging heat with the heat-conducting component. The heat-conducting component includes a cold-conducting plate, and the heat dissipation component includes a thermoelectric cooler and heat dissipation fins, with the heat dissipation fins fixedly connected to the hot end of the thermoelectric cooler. The battery pack also includes a protective shell connected to the outside of the battery box, and the semiconductor cooling chip and the heat dissipation fins are both located inside the protective shell. The heat dissipation mechanism also includes a heat dissipation fan, which is provided on the side of the protective shell. The cold end of the semiconductor cooling chip is fixedly connected to the cold-conducting plate, which is located in the second cavity below the central partition.

2. The battery pack according to claim 1, characterized in that, The battery module includes two first sides opposite each other in a first horizontal direction and two second sides opposite each other in a second horizontal direction; Each of the liquid cooling plates is attached to the outer side of a portion of the first side, a portion of the second side, and a portion of the other second side.

3. The battery pack according to claim 1, characterized in that, The pump assembly is located on the outside of the battery box.

4. The battery pack according to any one of claims 1 to 3, characterized in that, The number of battery modules is multiple, and the number of pairs of liquid cooling plates is the same as the number of battery modules, with each pair of liquid cooling plates corresponding to one battery module. The battery pack includes paired liquid cooling plates that move synchronously.

5. The battery pack according to any one of claims 1 to 3, characterized in that, The battery box includes a box body and a cover plate covering the box body. The battery pack also includes a plug and a slot. The plug is disposed on the cover plate and the slot is disposed on the box body. The plug is inserted into the slot. The battery pack also includes a latch that detachably locks the cover and the main body of the casing.

6. A vehicle, characterized in that, The vehicle includes a battery pack as claimed in any one of claims 1 to 5.

Images