Battery module and battery pack

Abstract

The invention provides a battery module and a battery pack. The battery module comprises a plurality of battery cell groups which are arranged at intervals along a first direction; the cold rows are arranged at intervals in the first direction, and the cold rows are arranged between every two adjacent battery cell groups; and the plurality of connecting terminals are arranged at one ends of the cold rows, the connecting terminals and the cold rows are arranged in a one-to-one correspondence manner, the adjacent cold rows are communicated with each other through the connecting terminals, the connecting terminal on the cold row far away from the most downstream is provided with a shunting port, and the shunting port is used for discharging the cooling liquid in the cold rows.

Description

Technical Field

[0001] The present invention relates to the technical field of battery modules, and in particular to a battery module and a battery pack. Background Art

[0002] In the related technology, cylindrical batteries have the characteristics of high energy density and high power, and are one of the mainstream choices for battery packs. Compared with traditional square batteries, cylindrical batteries mainly use a cooling method that fits the side of the liquid cooling plate to the battery cell. However, in the side liquid cooling method, when the coolant enters the main channel and flows to the end, it still maintains inertial motion, resulting in more coolant flow in the liquid cooling plate near the end than in the liquid cooling plate near the head end, resulting in uneven coolant flow between branches, leading to excessive temperature differences in the battery cells. Summary of the invention

[0003] Embodiments of the present invention provide a battery module and a battery pack, which can improve the technical problem of excessive temperature difference in battery cells.

[0004] In a first aspect, an embodiment of the present invention provides a battery module, comprising: a plurality of battery cell groups spaced apart along a first direction; a plurality of cold rows spaced apart along the first direction, with a cold row provided between two adjacent battery cell groups; a plurality of connecting terminals provided at one end of the cold row, the connecting terminals being provided in a one-to-one correspondence with the cold row, adjacent cold rows being interconnected via the connecting terminals, a diverter port being provided on the connecting terminal away from the most downstream cold row, and the diverter port being used to discharge coolant in the cold row.

[0005] In one embodiment, the connecting terminal also includes a first flow port and a second flow port, the first flow ports between adjacent connecting terminals are interconnected, and the second flow ports between adjacent connecting terminals are interconnected, the diversion port is connected to the first flow port, and the second flow port is isolated from the first flow port and the diversion port.

[0006] In one embodiment, the flow cross-sectional area of ​​the branch flow opening is greater than or equal to the flow cross-sectional area of ​​the first flow opening.

[0007] In one embodiment, the flow cross-sectional area of ​​the branch flow opening is greater than or equal to the flow cross-sectional area of ​​the second flow opening.

[0008] In one embodiment, the ratio of the inner diameter of the split port to the inner diameter of the first flow port is between 1 and 1.5.

[0009] In one embodiment, the inner diameter of the diversion port is D1, 10 mm ≤ D1 ≤ 18 mm.

[0010] In one embodiment, the connection terminal further includes a connection slot, and one end of the cold row is inserted into the connection slot to communicate with the diversion port, the first flow port, and the second flow port.

[0011] In one embodiment, an extension length of the connecting groove along the first direction is L1, and 1 mm≤L1≤5 mm.

[0012] In one embodiment, the connection terminal further includes a barrier structure, which is disposed in the connection groove and extends along the second direction to isolate the second flow port from the first flow port and the diversion port, and the first direction and the second direction are perpendicular to each other.

[0013] In one embodiment, an extension length of the barrier structure along the second direction is L2, and 10 mm ≤ L2 ≤ 26 mm.

[0014] In a second aspect, an embodiment of the present invention provides a battery pack, which includes the above-mentioned battery module.

[0015] By applying the technical solution of the present invention, a diversion port is provided on the connecting terminal on the cold row near the middle position. With this arrangement, when the coolant flows from the connecting terminal on the cold row near the head end to the diversion port, part of the coolant can be diverted to the outside in advance to reduce the coolant flow in the liquid cooling plate near the end. In this way, the coolant flow in the liquid cooling plate near the end can be made the same as the coolant flow in the liquid cooling plate near the head end, thereby making the coolant flow between the branches uniform and avoiding the problem of excessive temperature difference in the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 is a three-dimensional schematic diagram of a battery module provided by an embodiment of the present invention;

[0018] Figure 2 is a front view schematic diagram of a connection terminal provided by an embodiment of the present invention;

[0019] Figure 3 is a schematic side view of a connection terminal provided by an embodiment of the present invention;

[0020] Figure 4 is a rear view schematic diagram of a connection terminal provided by an embodiment of the present invention;

[0021] Figure 5 is a three-dimensional schematic diagram of a connection terminal provided by an embodiment of the present invention;

[0022] Figure 6 is a cross-sectional schematic diagram of a connection terminal provided by an embodiment of the present invention;

[0023] Figure 7 is a schematic diagram of the pressure of a liquid cooling plate of a battery module provided by an embodiment of the present invention;

[0024] Figure 8 It is a schematic diagram of the flow ratio of different liquid cooling plates of the battery module provided in an embodiment of the present invention.

[0025] The above drawings include the following reference numerals:

[0026] The battery cell group 10, the radiator 20, the connection terminal 30, the diversion port 31, the first flow port 32, the second flow port 33, the connection groove 34, the barrier structure 35, the first direction X, and the second direction Y. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 8 As shown, in the first aspect, an embodiment of the present invention provides a battery module, the battery module comprising: a plurality of battery cell groups 10 spaced apart along a first direction; a plurality of cold row 20 spaced apart along the first direction, a cold row 20 is arranged between two adjacent battery cell groups 10; a plurality of connecting terminals 30, arranged at one end of the cold row 20, the connecting terminals 30 are arranged in a one-to-one correspondence with the cold row 20, adjacent cold rows 20 are connected to each other through the connecting terminals 30, and the connecting terminal 30 on the cold row 20 away from the most downstream is provided with a diverter port 31, and the diverter port 31 is used to discharge the coolant in the cold row 20.

[0029] By applying the technical solution of the present invention, a diversion port 31 is provided on the connecting terminal 30 on the cold row 20 near the middle position. With this arrangement, when the coolant flows from the connecting terminal 30 on the cold row 20 near the head end to the diversion port 31, part of the coolant can be diverted to the outside in advance to reduce the coolant flow in the liquid cooling plate near the end. In this way, the coolant flow in the liquid cooling plate near the end can be made the same as the coolant flow in the liquid cooling plate near the head end, thereby making the coolant flow between the branches uniform and avoiding the problem of excessive temperature difference in the battery cells.

[0030] In the present application, the battery pack 10 includes a plurality of cylindrical batteries, and the radiator 20 is an S-shaped curved shape. The S-shaped curved radiator 20 can increase the contact area between the coolant and the heat sink fins, thereby improving the heat dissipation efficiency. This design helps to quickly conduct the heat generated by the battery pack 10 to the radiator 20, and the heat is taken away by the circulation of the coolant, thereby maintaining the temperature of the battery pack 10 stable.

[0031] At the same time, the S-shaped curved radiator 20 can make full use of the space and make the overall structure of the battery pack 10 more compact. This helps to save space inside the device and improve space utilization. Furthermore, compared with radiators 20 of other shapes, the S-shaped curved radiator 20 may generate less noise when the coolant flows. This helps to improve the quiet performance of the device and create a more comfortable use environment for users. The combination of cylindrical batteries and S-shaped radiators 20 can significantly improve the heat dissipation efficiency of the battery pack. The coolant is in full contact with the battery surface through the S-shaped radiator 20, quickly taking away the heat generated by the battery, and ensuring that the battery operates within the optimal operating temperature range. At the same time, the efficient heat dissipation system can maintain the consistency of temperature within the battery pack and reduce the impact of temperature fluctuations on battery performance. This helps to extend the service life of the battery and improve the reliability and stability of the battery pack.

[0032] Furthermore, the radiator 20 is usually made of materials with strong thermal conductivity and other excellent physical properties, such as aluminum or copper. As the material of the radiator 20, it has many significant advantages. Since aluminum has excellent thermal conductivity, it can quickly transfer heat from the heat source to the surface of the radiator 20, and then dissipate the heat into the air through a cooling fan or natural convection. This efficient thermal conductivity allows the aluminum radiator 20 to effectively dissipate heat in a short time and maintain stable operation of the equipment.

[0033] At the same time, the density of aluminum is relatively low, which enables the aluminum radiator 20 to achieve a lightweight design while ensuring heat dissipation performance. Lightweight design helps to reduce the overall weight of the equipment and improve the energy efficiency and portability of the equipment. Lightweight design is particularly important in equipment that needs to be moved or frequently changed. Furthermore, aluminum has good corrosion resistance in the natural environment and can resist erosion by a variety of chemical substances. This makes the aluminum radiator 20 less susceptible to damage such as corrosion and oxidation during use, thereby extending the service life of the radiator 20. At the same time, the surface treatment process of the aluminum radiator 20 (such as anodizing, spraying, etc.) can further improve its corrosion resistance.

[0034] Among them, aluminum has good processing properties and can be processed into radiators 20 of various shapes and sizes through various processes such as casting, forging, extrusion, and stretching. This enables the aluminum radiator 20 to meet the heat dissipation requirements of different equipment and different application scenarios. At the same time, the cold processing performance of aluminum is also good, and the strength and hardness of the radiator 20 can be improved through cold processing without reducing the thermal conductivity. Compared with other metal materials such as copper, the price of aluminum is relatively low, which makes the aluminum radiator 20 have an advantage in cost control. At the same time, the aluminum radiator 20 has excellent heat dissipation performance and can meet the heat dissipation requirements of most equipment, so it has a high cost performance. And aluminum is a recyclable metal that meets environmental protection requirements. Using aluminum as the radiator 20 material helps to reduce resource consumption and environmental pollution and achieve sustainable development.

[0035] Optionally, copper is a metal with excellent thermal conductivity, and its thermal conductivity is much higher than many other common metals, such as aluminum and iron. This means that copper can transfer heat from a heat source (such as a battery or inside an electronic device) to the surface of the radiator 20 more quickly and efficiently, and then dissipate it through a cooling fan or a liquid cooling system. This excellent thermal conductivity enables the copper radiator 20 to maintain excellent heat dissipation in high-load and high-temperature environments, ensuring the stable operation of the equipment. At the same time, copper has good processing properties and can be processed into radiators 20 of various shapes and sizes through a variety of processes such as casting, forging, extrusion, and stretching. This enables the copper radiator 20 to meet the heat dissipation needs of different devices and different application scenarios.

[0036] At the same time, copper has good cold working properties, and the strength and hardness of the radiator 20 can be improved by cold working without reducing the thermal conductivity. Moreover, copper has good corrosion resistance in the natural environment and can resist the erosion of various chemical substances. This makes the copper radiator 20 less susceptible to damage such as corrosion and oxidation during use, thereby extending the service life of the radiator 20. In addition, copper can also further improve its corrosion resistance through surface treatment (such as nickel plating, chrome plating, etc.).

[0037] Furthermore, copper has high mechanical strength and can withstand high pressure and tension, which makes the copper radiator 20 less likely to deform or be damaged during installation and use, thereby ensuring the stability and reliability of the heat dissipation system.

[0038] At the same time, higher mechanical strength also means that the copper radiator 20 can better withstand vibrations and impacts from inside the equipment, improving the durability of the entire cooling system. Copper has good ductility and plasticity, and can be easily made into cooling fins, waterways and other structures of various shapes and sizes. This enables the copper radiator 20 to more flexibly adapt to the cooling needs of different equipment and improve the overall performance of the cooling system. In summary, copper as the material of the radiator 20 has the advantages of excellent thermal conductivity, good processing performance, excellent corrosion resistance, high mechanical strength, and good ductility and plasticity.

[0039] In one embodiment, the connection terminal 30 also includes a first flow port 32 and a second flow port 33, the first flow ports 32 between adjacent connection terminals 30 are interconnected, and the second flow ports 33 between adjacent connection terminals 30 are interconnected, the diversion port 31 is connected to the first flow port 32, and the second flow port 33 is isolated from the first flow port 32 and the diversion port 31. This arrangement allows the fluid to flow smoothly between adjacent connection terminals 30, avoiding the accumulation and blockage of the fluid in a single connection terminal 30, thereby improving the flow efficiency of the fluid. Since the first flow ports 32 are interconnected, the fluid can maintain a low resistance during the flow process, reducing the pressure loss, so that the fluid can be more efficiently delivered to the target area. The design of the connection between the diversion port 31 and the first flow port 32 enables the system to perform flexible fluid distribution according to actual needs. At the same time, the isolation of the second flow port 33 from the first flow port 32 and the diversion port 31 provides the system with additional fluid channel options, enhancing the flexibility of the system.

[0040] At the same time, this design enables the connection terminal 30 to be applicable to a variety of fluid transmission scenarios, meeting the requirements of different application scenarios for fluid transmission efficiency, stability and flexibility. The isolation design of the second flow port 33 from the first flow port 32 and the diversion port 31 reduces the risk of fluid leakage. This design enables the system to maintain a high sealing performance during operation, avoiding system failure or performance degradation due to leakage. And because the fluid can flow smoothly between adjacent connection terminals 30, the stability of the system is enhanced. This helps to reduce system vibration, noise and other problems caused by poor fluid flow, and improves the overall performance of the system.

[0041] Furthermore, the design of the connection terminal 30 makes the installation process easier. Through the standardized interface and connection method, the installation and commissioning of the connection terminal 30 can be completed quickly. At the same time, due to the reasonable design of the flow port between the connection terminals 30, the system can be inspected and repaired more conveniently during maintenance. This helps to reduce maintenance costs and improve the availability and reliability of the system.

[0042] In one embodiment, the flow cross-sectional area of ​​the diverter port 31 is greater than or equal to the flow cross-sectional area of ​​the first flow port 32. The inner diameter of the diverter port 31 is D1, and the inner diameter of the first flow port 32 is D2, where D1≥D2. When designing the connecting terminal 30, when the inner diameter D1 of the diverter port 31 is greater than or equal to the inner diameter D2 of the first flow port 32 (D1≥D2), since the inner diameter D1 of the diverter port 31 is larger, the resistance encountered by the fluid when passing through the diverter port 31 is relatively small. This helps to reduce the energy loss of the fluid during the transmission process and improve the transmission efficiency of the fluid. At the same time, when D1≥D2, the diverter port 31 can more effectively distribute the fluid to each first flow port 32. This design ensures the uniform distribution of the fluid in the system and avoids the degradation of system performance due to uneven flow distribution.

[0043] Furthermore, the larger inner diameter of the diversion port 31 helps reduce the pressure fluctuation of the fluid during the transmission process. This helps to maintain the stable operation of the system and avoid system failure or performance degradation caused by pressure fluctuations. And because the diversion port 31 has a larger inner diameter, even if a part of the system fails or is blocked, the fluid can still continue to be transmitted to other parts through the diversion port 31. This improves the fault tolerance of the system and ensures the overall reliability of the system.

[0044] When the inner diameter of the diverter port 31 is greater than or equal to the inner diameter of the first circulation port 32, the designer can configure the fluid transmission path of the system more flexibly. This helps to simplify the design complexity of the system and reduce the design cost. The larger inner diameter of the diverter port 31 makes it easier to clean and inspect the system during maintenance. This helps to reduce maintenance costs and improve the availability and reliability of the system. By reasonably setting the inner diameter ratio of the diverter port 31 and the first circulation port 32, the amount of material used can be optimized. This helps to reduce production costs while ensuring that the performance of the system meets the requirements. The larger inner diameter of the diverter port 31 helps to reduce the scouring and wear of the connecting terminal 30 by the fluid. This helps to extend the service life of the connecting terminal 30 and improve the overall economy of the system.

[0045] In one embodiment, the flow cross-sectional area of ​​the diverter port 31 is greater than or equal to the flow cross-sectional area of ​​the second flow port 33. The inner diameter of the second flow port 33 is D3, D1≥D3. When designing the connecting terminal 30, when the inner diameter D1 of the diverter port 31 is greater than or equal to the inner diameter D3 of the second flow port 33 (D1≥D3), since the inner diameter D1 of the diverter port 31 is larger, the resistance encountered by the fluid when passing through the diverter port 31 is relatively small. This helps to reduce the energy loss of the fluid during the transmission process and improve the transmission efficiency of the fluid. At the same time, when D1≥D3, the cold row 20 can more effectively distribute the fluid to each second flow port 33. This design ensures the uniform distribution of the fluid in the system and avoids the degradation of system performance due to uneven flow distribution.

[0046] Furthermore, the larger inner diameter of the diversion port 31 helps reduce the pressure fluctuation of the fluid during the transmission process. This helps to maintain the stable operation of the system and avoid system failure or performance degradation caused by pressure fluctuations. And because the diversion port 31 has a larger inner diameter, even if a part of the system fails or is blocked, the fluid can still continue to be transmitted to other parts through the diversion port 31. This improves the fault tolerance of the system and ensures the overall reliability of the system.

[0047] When the inner diameter of the diverter port 31 is greater than or equal to the inner diameter of the second circulation port 33, the fluid transmission path of the system can be configured more flexibly. This helps to simplify the design complexity of the system and reduce the design cost. The larger inner diameter of the diverter port 31 makes it easier to clean and inspect the system during maintenance. This helps to reduce maintenance costs and improve the availability and reliability of the system. By reasonably setting the inner diameter ratio of the diverter port 31 and the second circulation port 33, the amount of material used can be optimized. This helps to reduce production costs while ensuring that the performance of the system meets the requirements. The larger inner diameter of the diverter port 31 helps to reduce the scouring and wear of the connecting terminal 30 by the fluid. This helps to extend the service life of the connecting terminal 30 and improve the overall economy of the system.

[0048] In one embodiment, the ratio of the inner diameter of the diversion port 31 to the inner diameter of the first flow port 32 is between 1 and 1.5. Through the above configuration, it can be ensured that the fluid is more uniform during the diversion process, and at the same time, the above inner diameter ratio can reduce the resistance encountered by the body during the diversion process, thereby reducing pressure loss, which helps to reduce energy consumption, improve the overall efficiency of the system, and help maintain the stability of the internal pressure of the system.

[0049] In one embodiment, the inner diameter of the diversion port 31 is D1, 10mm≤D1≤18mm. The inner diameter of the diversion port 31 is set between 10mm and 18mm (10mm≤D1≤18mm). Within this inner diameter range, the resistance of the fluid passing through the diversion port 31 is moderate, and will not be too large to cause serious energy loss, nor too small to limit the flow. This design helps to maintain smooth transmission of the fluid and improve the overall transmission efficiency. An appropriate inner diameter of the diversion port 31 can ensure that the fluid is evenly distributed during the diversion process, avoiding excessive or too small flow rates from adversely affecting system performance. At the same time, the design range of the inner diameter of the diversion port 31 helps to reduce pressure fluctuations during fluid transmission, maintain the stability of the system pressure, and thus enhance the stability of the system.

[0050] Furthermore, within this inner diameter range, even if a part of the system fails or is blocked, the diversion port 31 can still maintain a certain flow transmission capacity, thereby improving the fault tolerance of the system. Within this inner diameter range, materials can be used more reasonably to avoid waste, while ensuring the performance and reliability of the connection terminal 30. Appropriate design of the inner diameter of the diversion port 31 helps reduce production costs.

[0051] At the same time, the performance and reliability of the system are maintained, thereby maximizing cost-effectiveness. The design range of the inner diameter of the diverter port 31 enables the connection terminal 30 to be applicable to a variety of fluid transmission scenarios, such as cooling systems, lubrication systems, fuel systems, etc., to meet the needs of different application scenarios. The appropriate inner diameter range enables the system to respond to flow changes more flexibly, improving the adaptability and flexibility of the system.

[0052] In the present application, D1 can be set to 10 mm, 12 mm or 18 mm, etc.

[0053] In one embodiment, the connection terminal 30 also includes a connection groove 34, and one end of the cold row 20 is inserted into the connection groove 34 to communicate with the diversion port 31, the first flow port 32, and the second flow port 33. The cold row 20 is connected to various flow ports inside the connection terminal 30 through the connection groove 34, so that heat can be efficiently transferred to the cold row 20. This design helps to optimize the heat exchange process and improve the heat dissipation efficiency. At the same time, the design of the connection groove 34 allows the cold row 20 to be easily inserted therein without the need for complicated installation steps and tools. This design reduces the difficulty and cost of installation and improves the installation efficiency. In addition, the connection groove 34 and the cold row 20 are tightly matched to ensure a reliable connection between the connection terminal 30 and the cold row 20. This design avoids performance degradation or failures caused by poor connection.

[0054] In one embodiment, the extension length of the connecting groove 34 along the first direction is L1, 1mm≤L1≤5mm. By setting L1 within this range, the compatibility between the connecting groove 34 and the cold row 20 or other connecting components can be ensured. This precise dimensional control helps to avoid looseness or overtightening during the connection process, ensuring the stability and reliability of the connection. A smaller L1 range helps to reduce errors during the installation process. Since the length of the connecting groove 34 is limited, the installer can more easily ensure that the cold row 20 or other connecting components are correctly inserted into the connecting groove 34, thereby improving the installation accuracy.

[0055] At the same time, the appropriate length of the connection groove 34 helps to optimize the heat conduction path. By ensuring close contact between the cold row 20 and the connection groove 34, heat can be more effectively transferred from the connection terminal 30 to the cold row 20, thereby improving the heat dissipation efficiency. The shorter length of the connection groove 34 helps to reduce thermal resistance. Thermal resistance is an obstacle in the heat transfer process. The shorter connection groove 34 can reduce the loss of heat during the transfer process, thereby improving the overall heat dissipation performance of the system. The shorter length of the connection groove 34 helps to enhance the structural strength of the connection terminal 30. By reducing the length of the connection groove 34, the connection terminal 30 can be made more stable when subjected to force, less prone to deformation or damage, and the shorter connection groove 34 can also help resist external impact. When subjected to external force, the shorter connection groove 34 can reduce the impact of the impact on the connection terminal 30, thereby protecting the integrity of the connection components and the entire system.

[0056] In the present application, L1 can be set to 1 mm, 3 mm or 5 mm, etc.

[0057] In one embodiment, the connection terminal 30 further includes a barrier structure 35, which is disposed in the connection groove 34, and the barrier structure 35 extends along the second direction to isolate the second flow port 33 from the first flow port 32 and the diversion port 31, and the first direction and the second direction are perpendicular to each other. In this way, the second flow port 33 can be isolated from the first flow port 32 and the diversion port 31, so as to facilitate the communication of the coolant between the multiple cold rows 20, and at the same time, the coolant will not flow in series between the second flow port 33 and the first flow port 32 and the diversion port 31, so as to ensure the normal operation of the device.

[0058] In one embodiment, the extending length of the barrier structure 35 along the second direction is L2, and 10 mm≤L2≤26 mm.

[0059] In a second aspect, an embodiment of the present invention provides a battery pack, which includes the above-mentioned battery module.

[0060] By applying the technical solution of the present invention, a diversion port 31 is provided on the connecting terminal 30 on the cold row 20 near the middle position. With this arrangement, when the coolant flows from the connecting terminal 30 on the cold row 20 near the head end to the diversion port 31, part of the coolant can be diverted to the outside in advance to reduce the coolant flow in the liquid cooling plate near the end. In this way, the coolant flow in the liquid cooling plate near the end can be made the same as the coolant flow in the liquid cooling plate near the head end, thereby making the coolant flow between the branches uniform and avoiding the problem of excessive temperature difference in the battery cells.

[0061] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0062] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0063] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0064] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0065] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery module, characterized in that: The battery module comprises: A plurality of battery cell groups spaced apart along a first direction; A plurality of cold rows arranged at intervals along a first direction, wherein the cold row is arranged between two adjacent battery cell groups; A plurality of connecting terminals are arranged at one end of the cold row, the connecting terminals are arranged in one-to-one correspondence with the cold row, adjacent cold rows are connected to each other through the connecting terminals, and the connecting terminal on the cold row far away from the most downstream is provided with a diversion port, and the diversion port is used to discharge the coolant in the cold row.

2. The battery module according to claim 1, characterized in that: The connecting terminal also includes a first flow port and a second flow port, the first flow ports between adjacent connecting terminals are interconnected, and the second flow ports between adjacent connecting terminals are interconnected, the diversion port is connected to the first flow port, and the second flow port is isolated from the first flow port and the diversion port.

3. The battery module according to claim 2, characterized in that: The flow cross-sectional area of ​​the diversion port is greater than or equal to the flow cross-sectional area of ​​the first flow port.

4. The battery module according to claim 3, characterized in that: The flow cross-sectional area of ​​the diversion port is greater than or equal to the flow cross-sectional area of ​​the second flow port.

5. The battery module according to claim 3, characterized in that: The ratio of the inner diameter of the diversion port to the inner diameter of the first flow port is between 1 and 1.

5.

6. The battery module according to claim 3, characterized in that: The inner diameter of the diversion port is D1, 10mm≤D1≤18mm.

7. The battery module according to any one of claims 2 to 6, characterized in that: The connection terminal further includes a connection slot, and one end of the cold row is inserted into the connection slot to communicate with the diversion port, the first flow port, and the second flow port.

8. The battery module according to claim 7, characterized in that: An extension length of the connecting groove along the first direction is L1, 1mm≤L1≤5mm.

9. The battery module according to claim 7, characterized in that: The connecting terminal further comprises a blocking structure, which is arranged in the connecting groove and extends along a second direction to isolate the second flow port from the first flow port and the diversion port, and the first direction is perpendicular to the second direction.

10. The battery module according to claim 9, characterized in that: An extension length of the barrier structure along the second direction is L2, 10 mm ≤ L2 ≤ 26 mm.

11. A battery pack, characterized in that: The battery pack comprises a battery module as claimed in any one of claims 1 to 10.

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