Battery module and liquid-cooled battery pack

Abstract

The invention provides a battery module and a liquid-cooled battery pack, the battery module comprises: a plurality of battery cells arranged at intervals, each battery cell having a first pole and a second pole opposite in polarity; the connecting pieces are arranged on the first pole and the second pole, and the first pole and the second pole are electrically connected with the corresponding connecting pieces respectively; the connecting bar is provided with a first clamping part and a second clamping part which are oppositely arranged, the first clamping part is used for being matched with the connecting piece on the first pole of one battery cell in a clamping manner, and the second clamping part is used for being matched with the connecting piece on the second pole of the other adjacent battery cell in a clamping manner, so that the two adjacent battery cells are connected in series. By applying the technical scheme provided by the invention, the technical problem of low assembly efficiency between the battery monomer and the aluminum row can be improved.

Description

Technical Field

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

[0002] In the related technology, when integrating battery cells into modules and battery packs, the battery cells need to be fixed side by side first, and then the aluminum bars are welded. During the fixing and welding process, the position of the battery cells may be misaligned, resulting in poor welding and other assembly problems; and the welding process is prone to produce metal debris, bringing safety risks such as short circuits; at the same time, the first-time pass rate of welding generally needs to be improved, and there is rework and repair, which wastes manpower and material resources.

[0003] Therefore, the above solution reduces the assembly efficiency between the battery cells and the aluminum bars, and cannot meet the efficient production requirements of the device. Summary of the invention

[0004] The embodiments of the present invention provide a battery module and a liquid-cooled battery pack, which can improve the technical problem of low assembly efficiency between battery cells and aluminum bars.

[0005] In the first aspect, an embodiment of the present invention provides a battery module, which includes: a plurality of battery cells arranged at intervals, each battery cell having a first pole and a second pole with opposite polarities; a connector, the first pole and the second pole are both provided with a connector, the first pole and the second pole are respectively electrically connected to their corresponding connectors; a connecting row, having a first clamping portion and a second clamping portion arranged opposite to each other, the first clamping portion being used to clamp and cooperate with the connector on the first pole of one of the battery cells, and the second clamping portion being used to clamp and cooperate with the connector on the second pole of another adjacent battery cell, so that the two adjacent battery cells are connected in series.

[0006] In one embodiment, the connecting member includes a body and a clamping member, the body is connected to the first pole or the second pole, and the clamping member is movably connected to the body so that the clamping member can move relative to the body to clamp and separate the first clamping part or the second clamping part.

[0007] In one embodiment, the clamping member is slidably connected to the body along the length direction of the battery module.

[0008] In one embodiment, the connecting member includes: a main body having a accommodating cavity; a clamping member connected to the main body and capable of moving relative to the main body along the length direction of the battery module, one end of the clamping member is movably arranged in the accommodating cavity, and the other end of the clamping member is located on the outside of the main body, and the other end of the clamping member is used to clamp and separate with the first clamping part and the second clamping part.

[0009] In one embodiment, the clamping member also includes: a connecting shaft, including a first end and a second end opposite to each other, the first end is movably arranged in the accommodating cavity, and the second end is located on the outside of the main body; a clamping block, connected to the second end, and the first clamping part and the second clamping part are used to clamp and separate with the clamping block.

[0010] In one embodiment, the connecting member also includes: an elastic member, which is sleeved on the outer periphery of the connecting shaft, and one end of the elastic member abuts against the clamping block, and the other end of the elastic member abuts against the outer wall of the main body, and the elastic member is used to apply a force to the clamping block along the direction from the first end to the second end.

[0011] In one embodiment, the elastic member comprises a spring.

[0012] In one embodiment, the connection row includes a plate body, the first clamping portion and the second clamping portion are protrudingly provided on the same side of the plate body, and the first clamping portion and the second clamping portion are spaced apart along the length direction of the plate body.

[0013] In one embodiment, the connection row includes a space between the first clamping portion and the second clamping portion, and the first clamping portion and the second clamping portion are respectively provided with a hook structure on one side facing the space; or, the first clamping portion and the second clamping portion are respectively provided with a hook structure on one side away from the space.

[0014] In one embodiment, the first clamping portion and the second clamping portion are distributed at two ends of the plate body; or, the first clamping portion and the second clamping portion are spaced from both ends of the plate body.

[0015] In one embodiment, a first threaded hole is provided on the connecting member, a second threaded hole corresponding to the first threaded hole is provided on the connecting row, and the fixing member is connected to the first threaded hole and the second threaded hole to fix the connecting member and the connecting row.

[0016] In a second aspect, an embodiment of the present invention provides a liquid-cooled battery pack, which includes: a cover body; a liquid-cooled frame having a accommodating cavity, the cover body being arranged on the liquid-cooled frame; the above-mentioned battery module is arranged in the accommodating cavity, and the liquid-cooled frame is used to cool the battery module.

[0017] In one embodiment, the liquid cooling frame includes: a liquid cooling bottom plate; and a plurality of liquid cooling side plates, which are enclosed along the edge of the liquid cooling bottom plate to form a receiving cavity, and the liquid cooling cavity of the liquid cooling bottom plate and the liquid cooling cavity of the plurality of liquid cooling side plates are independent of each other.

[0018] In one embodiment, the liquid-cooled battery pack further includes: a control panel, which is arranged on the outside of the cover body, and the control panel is used to be electrically connected to the battery module to control the battery module.

[0019] In one embodiment, the liquid cooling cavity of the liquid cooling side plate arranged opposite to the control panel is independent of the liquid cooling cavities of the other plurality of liquid cooling side plates.

[0020] In one embodiment, the flow channel of the liquid cooling cavity of the liquid cooling side plate includes a unidirectional flow channel.

[0021] By applying the technical solution of the present invention, by arranging a connector on the first pole and the second pole, in the subsequent assembly process, it is only necessary to use the first clamping portion to clamp and cooperate with the connector on the first pole of one of the battery cells, and the second clamping portion to clamp and cooperate with the connector on the second pole of another adjacent battery cell, so that the two adjacent battery cells can be connected in series. Compared with the traditional welding connection method, the clamping assembly does not require the use of high-temperature welding equipment, so there is no open flame at the installation site, which improves safety. At the same time, it avoids harmful substances that may be generated during the welding process, which is more friendly to the environment and the health of operators. In addition, the clamping assembly is usually simple and quick to operate, eliminating tedious preparation work and waiting time, improving construction efficiency, saving time cost, and thus facilitating mass production of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 is a three-dimensional schematic diagram of a battery module provided by an embodiment of the present invention;

[0024] Figure 2 is a cross-sectional schematic diagram of a partial structure of a battery module provided by an embodiment of the present invention;

[0025] Figure 3 is a three-dimensional schematic diagram of a connection bar provided by an embodiment of the present invention;

[0026] Figure 4 is a three-dimensional schematic diagram of another connection bar provided by an embodiment of the present invention;

[0027] Figure 5 is a three-dimensional schematic diagram of a connecting piece provided by an embodiment of the present invention;

[0028] Figure 6 is a three-dimensional schematic diagram of a liquid-cooled battery pack provided by an embodiment of the present invention;

[0029] Figure 7 is a three-dimensional schematic diagram of a partial structure of a liquid-cooled battery pack provided by an embodiment of the present invention;

[0030] Figure 8 is a schematic top view of a liquid-cooled battery pack provided by an embodiment of the present invention;

[0031] Fig. 9 yes Figure 8 Schematic diagram of the cross section at AA in the middle;

[0032] Fig.10 yes Figure 8 Schematic diagram of the cross section at BB in the middle.

[0033] The above drawings include the following reference numerals:

[0034] Battery cell 10, first pole 11, second pole 12,

[0035] Connecting member 20, body 21, accommodating cavity 211, clamping member 22, connecting shaft 221, clamping block 222, elastic member 23, first threaded hole 24,

[0036] The connecting row 30, the plate body 31, the first clamping portion 32, the second clamping portion 33, the second threaded hole 34,

[0037] Cover 40,

[0038] Liquid cooling frame 50, accommodating space 51, liquid cooling bottom plate 52, liquid cooling side plate 53, one-way flow channel 54,

[0039] Control Panel 60,

[0040] The length direction X of the battery module. DETAILED DESCRIPTION

[0041] 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.

[0042] like Figures 1 to 10 As shown, in the first aspect, an embodiment of the present invention provides a battery module, the battery module comprising: a plurality of battery cells 10 arranged at intervals, each battery cell 10 having a first pole 11 and a second pole 12 with opposite polarities; a connector 20, the first pole 11 and the second pole 12 are both provided with a connector 20, the first pole 11 and the second pole 12 are respectively electrically connected to the corresponding connector 20; a connecting row 30, having a first clamping portion and a second clamping portion arranged opposite to each other, the first clamping portion being used for clamping and cooperating with the connector 20 on the first pole 11 of one of the battery cells 10, and the second clamping portion being used for clamping and cooperating with the connector 20 on the second pole 12 of another adjacent battery cell 10, so as to connect the two adjacent battery cells 10 in series.

[0043] By applying the technical solution of the present invention, by arranging a connector 20 on the first pole 11 and the second pole 12, in the subsequent assembly process, it is only necessary to use the first clamping portion to clamp and cooperate with the connector 20 on the first pole 11 of one of the battery cells 10, and the second clamping portion to clamp and cooperate with the connector 20 on the second pole 12 of another adjacent battery cell 10, so as to realize the connection of two adjacent battery cells 10 in series. Compared with the traditional welding connection method, the clamping assembly does not require the use of high-temperature welding equipment, so there is no open flame at the installation site, which improves safety. At the same time, it avoids harmful substances that may be generated during the welding process, which is more friendly to the environment and the health of operators. In addition, the clamping assembly is usually simple and quick to operate, eliminating tedious preparation work and waiting time, improving construction efficiency, saving time cost, and thus facilitating mass production of the device.

[0044] In one embodiment, the connector 20 includes a body 21 and a clamping member 22, the body 21 is connected to the first pole 11 or the second pole 12, and the clamping member 22 is movably connected to the body 21, so that the clamping member 22 can be moved relative to the body 21, so that the clamping member 22 is clamped and separated from the first clamping portion 32 or the second clamping portion 33. Such a configuration can not only meet the connection requirements of the connector 20 and the connecting bar 30, but also the above-mentioned connection method is simple and reliable, which is conducive to the installation and disassembly of the connector 20 and the connecting bar 30, so as to improve the assembly and disassembly efficiency of the device.

[0045] In one embodiment, the clamping member 22 is slidably connected to the body 21 along the length direction of the battery module. The sliding connection usually does not require the use of special tools or materials for connection and disassembly, which can greatly save time and cost. At the same time, the sliding connection can reduce the risk of wear and damage to the components. Of course, in other embodiments of the present application, the clamping member 22 and the body 21 can also be set to be rotatably connected, as long as it can meet the use requirements of the device.

[0046] In one embodiment, the connector 20 includes: a body 21 having a receiving cavity 211; a clamping member 22, which is connected to the body 21 and can move relative to the body 21 along the length direction of the battery module, one end of the clamping member 22 is movably arranged in the receiving cavity 211, the other end of the clamping member 22 is located outside the body 21, and the first clamping portion and the second clamping portion are used to clamp and separate from the other end of the clamping member 22. This arrangement facilitates the clamping and matching of the clamping member 22 with the first clamping portion and the second clamping portion on the connecting row 30 to meet the assembly requirements of the device. At the same time, the clamping member 22 is movably arranged in the receiving cavity 211, and the clamping member 22 does not occupy additional installation space, which is conducive to reducing the overall volume of the device to achieve miniaturization of the device.

[0047] In one embodiment, the clamping member 22 further includes: a connecting shaft 221, including a first end and a second end opposite to each other, the first end being movably disposed in the accommodating cavity 211, and the second end being located outside the body 21; a clamping block 222, connected to the second end, the first clamping portion and the second clamping portion being used to clamp and separate from the clamping block 222. In the present application, the movability of one end of the connecting shaft 221 in the accommodating cavity 211 provides convenience for installation and adjustment, while the clamping cooperation between the clamping block 222 and the first clamping portion and the second clamping portion ensures the firmness and stability of the connection.

[0048] Further, the connecting shaft 221 and the clamping block 222 may be a split structure. Since the connecting shaft 221 and the clamping block 222 are separate independent components, they can be replaced more easily. If one of the components is damaged or worn, it is not necessary to replace the entire assembly, only the damaged part needs to be replaced, thereby reducing maintenance costs. The split structure also provides greater flexibility, allowing different connecting shafts 221 or clamping blocks 222 to be used in different application scenarios to meet specific connection requirements. The connecting shaft 221 and the clamping block 222 of the split structure are generally easier to install and disassemble. For example, the connecting shaft 221 can be installed in the accommodating cavity 211 by a simple action, and the clamping block 222 can be connected to the connecting shaft 221 by a buckle or other quick connection mechanism. This convenience allows faster access and replacement of components during maintenance or repair, reducing downtime and production losses. The split structure allows the connecting shaft 221 and the clamping block 222 to have a certain degree of independence in design and manufacturing. This means that the most suitable combination of the connecting shaft 221 and the clamping block 222 can be selected according to different connection requirements, material properties or working environments.

[0049] In one embodiment, the connector 20 further includes an elastic member 23, which is sleeved on the outer periphery of the connecting shaft 221, and one end of the elastic member 23 abuts against the clamping block 222, and the other end of the elastic member 23 abuts against the outer side wall of the body 21, and the elastic member 23 is used to apply a force from the first end to the second end to the clamping block 222. In this way, when the corresponding connecting row 30 contacts the first clamping portion or the second clamping portion with the front end of the clamping block 222, the elastic member 23 and the connecting shaft 221 are forced to retract until the first clamping portion or the second clamping portion is engaged with the clamping block 222, and finally can form an interlock with the connecting row 30, and tightly connect the two adjacent battery cells 10 to achieve a close fit between the two.

[0050] In one embodiment, the elastic member 23 includes a spring. Since the spring has good elasticity, the spring will deform when subjected to an external force. When the external force is removed, the spring will quickly return to its original state using its own elastic restoring force. This characteristic makes the spring an ideal material for realizing the reset function. In the reset member, the spring is usually designed to push or pull the relevant components back to the initial position after being triggered. At the same time, the spring is specially treated and manufactured, has high durability and fatigue resistance, and can maintain a stable reset effect for a long time. And the spring can be customized according to different application requirements, including shape, size, material and other aspects, to meet the design requirements of various reset members. Moreover, compared with other reset materials, the production cost of the spring is lower, and it is easy to process and install, which reduces the overall cost of the reset member.

[0051] In one embodiment, the connection row 30 includes a plate body 31, a first clamping portion 32 and a second clamping portion 33 are convexly arranged on the same side of the plate body 31, and the first clamping portion 32 and the second clamping portion 33 are spaced apart along the length direction of the plate body 31. Such an arrangement can not only meet the clamping requirements of the device, but also the above structure is simple and easy to process, thereby facilitating the mass production of the connection row 30. A hook structure is arranged on one end of the first clamping portion 32 and the second clamping portion 33 away from the plate body 31. Such a structure is usually elastic and can be easily clamped into or out of the connector 20. Through the above structure, the connection row 30 can be quickly installed and disassembled to improve the assembly and disassembly efficiency of the device.

[0052] In one embodiment, the connection row 30 includes a space between the first clamping portion 32 and the second clamping portion 33, and the first clamping portion 32 and the second clamping portion 33 are respectively provided with a hook structure on one side facing the space; or, the first clamping portion 32 and the second clamping portion 33 are respectively provided with a hook structure on one side facing away from the space. The first clamping portion 32 and the second clamping portion 33 are arranged at intervals to ensure that they do not interfere with each other. The hook structure is the key connection point between the connection row 30 and the connector 20, and a stable connection is achieved through elastic clamping. The hook structure is usually designed to be easy to insert and remove in order to meet the needs of different connectors 20.

[0053] The first clamping portion 32 and the second clamping portion 33 are distributed at both ends of the plate body 31; or, the first clamping portion 32 and the second clamping portion 33 are spaced from both ends of the plate body 31. This arrangement enables the device to select connection rows 30 of different structures according to the use environment to meet the use requirements of the device.

[0054] In one embodiment, a first threaded hole 24 is provided on the connecting member 20, and a second threaded hole 34 corresponding to the first threaded hole 24 is provided on the connecting row 30. The fixing member is connected to the first threaded hole 24 and the second threaded hole 34 to fix the connecting member 20 and the connecting row 30.

[0055] In the second aspect, an embodiment of the present invention provides a liquid-cooled battery pack, which includes: a cover 40; a liquid-cooled frame 50, which has a receiving cavity 211, and the cover 40 is covered on the liquid-cooled frame 50; the above-mentioned battery module is arranged in the receiving cavity 211, and the liquid-cooled frame 50 is used to cool the battery module. The liquid-cooled frame 50, as an efficient thermal management technology, is widely used in the cooling process of the battery module. The liquid-cooled frame 50 is a system that reduces the temperature of the battery module by a liquid cooling medium, absorbs the heat generated by the module by the cooling liquid, and then dissipates the heat to the external environment, thereby achieving the cooling of the battery module. The liquid-cooled frame 50 uses liquid as a cooling medium, which has higher heat dissipation efficiency and lower noise than the traditional air cooling method. At the same time, the liquid-cooled frame 50 can ensure that the temperature inside the battery module is more uniform, avoiding battery performance degradation or safety problems caused by excessive temperature differences. In addition, the liquid-cooled frame 50 can adapt to battery modules of different sizes and shapes, and has good flexibility and scalability.

[0056] The liquid cooling frame 50 includes: a liquid cooling base plate 52; a plurality of liquid cooling side plates 53, which are enclosed along the edge of the liquid cooling base plate 52 to form a receiving cavity 211, and the liquid cooling cavity of the liquid cooling base plate 52 and the liquid cooling cavity of the plurality of liquid cooling side plates 53 are independent of each other. By setting the above structure, it means that each liquid cooling cavity has its own independent cooling liquid circulation system and heat dissipation path, and there is also a design in which the liquid cooling cavity of the liquid cooling base plate 52 and the liquid cooling cavity of the liquid cooling side plate 53 are interconnected. In this design, the coolant can flow between different liquid cooling cavities to achieve a more uniform temperature distribution and higher heat dissipation efficiency. This design can ensure that each liquid cooling cavity can independently control the temperature, thereby improving the flexibility and reliability of the system.

[0057] In one embodiment, the liquid-cooled battery pack further includes: a control panel 60, which is arranged on the outside of the cover 40, and the control panel 60 is used to electrically connect to the battery module to control the battery module. The control panel 60 of the liquid-cooled battery pack is an important part of the battery management system (BMS), which undertakes the key tasks of monitoring, controlling and protecting the battery pack. 1. Monitoring function: The control panel 60 can monitor the temperature of each battery cell in the battery pack in real time to ensure that the battery operates within a suitable temperature range. When the temperature is abnormal, the control panel 60 will sound an alarm and take corresponding protective measures, such as starting the cooling system or stopping the battery charging and discharging. Voltage and current monitoring: The control panel 60 can monitor the voltage and current changes of the battery pack to ensure that the battery operates within a safe charging and discharging range. By monitoring the voltage and current, the abnormal conditions of the battery pack, such as short circuit, overcharge, over discharge, etc., can be discovered in time, and corresponding protective measures can be taken. 2. Control function: The control panel 60 can control the operation of the liquid cooling system, such as starting, stopping and adjusting the flow and temperature of the coolant. By accurately controlling the cooling system, it can be ensured that the battery pack operates within the optimal temperature range, extending the battery life and improving performance. The control panel 60 can accurately control the charging and discharging process of the battery according to the actual situation of the battery pack and the charging / discharging requirements. By optimizing the charging and discharging strategy, the charging speed and discharge efficiency of the battery can be improved, while reducing the loss of the battery and extending the service life. 3. Protection function When the temperature of the battery pack is too high, the control panel 60 will automatically start the cooling system to reduce the battery temperature and prevent dangerous situations such as thermal runaway and explosion of the battery. The control panel 60 can monitor the charging / discharging status of the battery in real time. When the battery reaches the overcharge / overdischarge threshold, it will automatically cut off the charging / discharging circuit to prevent battery damage and safety accidents. When a short circuit occurs inside the battery pack, the control panel 60 will quickly cut off the circuit to prevent the short-circuit current from damaging the battery and the vehicle. 4. Human-computer interaction function The control panel 60 can display the real-time status information of the battery pack, such as temperature, voltage, current, remaining power, etc., so that the driver and maintenance personnel can understand the working status of the battery pack. When the battery pack fails, the control panel 60 will send out an audible and visual alarm signal and display the fault type and location information, so that the maintenance personnel can quickly locate and handle the fault.

[0058] In one embodiment, the liquid cooling cavity of the liquid cooling side plate 53 arranged opposite to the control panel 60 is independent of the liquid cooling cavities of the other multiple liquid cooling side plates 53. The independent liquid cooling cavities can ensure that each liquid cooling side plate 53 can independently perform heat exchange, thereby improving the heat dissipation efficiency. The coolant in each liquid cooling cavity can accurately cool the corresponding battery module or heat source to avoid cross interference of heat. The independent liquid cooling cavity design can reduce the risk of system failure. If a problem occurs in a liquid cooling cavity, such as coolant leakage or blockage, it will not affect the normal operation of other liquid cooling cavities. This helps to ensure the stability and reliability of the entire liquid cooling system. Independent liquid cooling cavities make maintenance and management easier. If the coolant needs to be replaced or the liquid cooling cavity needs to be cleaned, the operation can be performed on a single liquid cooling cavity without affecting the entire liquid cooling system.

[0059] In one embodiment, the flow channel of the liquid cooling chamber of the liquid cooling side plate 53 includes a one-way flow channel 54. This can improve the flow efficiency of the cooling liquid, thereby improving the heat exchange efficiency of the device to meet the use requirements of the device.

[0060] By applying the technical solution of the present invention, by arranging the connector 20 on the first pole 11 and the second pole 12, in the subsequent assembly process, it is only necessary to use the first clamping part to clamp and cooperate with the connector 20 on the first pole 11 of one of the battery cells 10, and the second clamping part to clamp and cooperate with the connector 20 on the second pole 12 of another adjacent battery cell 10, so as to realize that the two adjacent battery cells 10 are connected in series. Compared with the traditional welding connection method, the clamping assembly does not require the use of high-temperature welding equipment, so there is no open flame at the installation site, which improves safety, and avoids harmful substances that may be generated during the welding process, which is more friendly to the environment and the health of operators, and the clamping assembly is usually simple and quick to operate, eliminating tedious preparation work and waiting time, improving construction efficiency, saving time cost, and thus facilitating mass production of the device. It should be noted that the terms used here 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 forms are intended to include the plural forms. In addition, it should be understood that when the terms "including" and / or "comprising" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0061] 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.

[0062] 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.

[0063] 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" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0064] 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.

[0065] 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 cells arranged at intervals, each of the cells having a first pole and a second pole with opposite polarities; A connecting piece, wherein the first pole and the second pole are both provided with the connecting piece, and the first pole and the second pole are respectively electrically connected to the corresponding connecting piece; The connecting row has a first clamping portion and a second clamping portion, wherein the first clamping portion is used to clamp and cooperate with the connecting piece on the first pole of one of the battery cells, and the second clamping portion is used to clamp and cooperate with the connecting piece on the second pole of another adjacent battery cell, so that the two adjacent battery cells are connected in series.

2. The battery module according to claim 1, characterized in that: The connecting member includes a body and a clamping member, the body is connected to the first pole or the second pole, and the clamping member is movably connected to the body so that the clamping member can move relative to the body to clamp and separate from the first clamping part or the second clamping part.

3. The battery module according to claim 2, characterized in that: The clamping member is slidably connected to the body along the length direction of the battery module.

4. The battery module according to claim 3, characterized in that: The main body has a accommodating cavity; the clamping piece is connected to the main body and can move relative to the main body along the length direction of the battery module, one end of the clamping piece is movably arranged in the accommodating cavity, and the other end of the clamping piece is located on the outside of the main body, and the other end of the clamping piece is used to clamp and separate with the first clamping part or the second clamping part.

5. The battery module according to claim 4, characterized in that: The card connector also includes: A connecting shaft, comprising a first end and a second end opposite to each other, wherein the first end is movably disposed in the accommodating cavity, and the second end is located outside the body; A clamping block is connected to the second end, and is used for clamping and separating with the first clamping portion or the second clamping portion.

6. The battery module according to claim 5, characterized in that: The clamping member also includes: an elastic member, which is sleeved on the outer circumference of the connecting shaft, and one end of the elastic member abuts against the clamping block, and the other end of the elastic member abuts against the outer side wall of the body, and the elastic member is used to apply a force to the clamping block along the direction from the first end to the second end.

7. The battery module according to claim 6, characterized in that: The elastic member includes a spring.

8. The battery module according to any one of claims 1 to 7, characterized in that: The connecting row includes a plate body, the first clamping portion and the second clamping portion are protrudingly arranged on the same side of the plate body, and the first clamping portion and the second clamping portion are spaced apart and distributed along the length direction of the plate body.

9. The battery module according to claim 8, characterized in that: The connecting row includes a space between the first clamping portion and the second clamping portion, and the first clamping portion and the second clamping portion are respectively provided with a hook structure on one side facing the space; or, the first clamping portion and the second clamping portion are respectively provided with a hook structure on one side away from the space.

10. The battery module according to claim 8, characterized in that: The first clamping portion and the second clamping portion are distributed at two ends of the plate body; or, the first clamping portion and the second clamping portion are spaced from both ends of the plate body.

11. The battery module according to any one of claims 1 to 7, characterized in that: The connecting member is provided with a first threaded hole, the connecting row is provided with a second threaded hole corresponding to the first threaded hole, and the fixing member is connected with the first threaded hole and the second threaded hole through penetration to fix the connecting member and the connecting row.

12. A liquid-cooled battery pack, characterized in that: The liquid-cooled battery pack comprises: Cover body; The liquid cooling frame has a containing space, and the cover is arranged on the liquid cooling frame; The battery module according to any one of claims 1 to 11 is arranged in the accommodating space, and the liquid cooling frame is used to cool the battery module.

13. The liquid-cooled battery pack according to claim 12, characterized in that: The liquid cooling frame comprises: Liquid cooling baseplate; A plurality of liquid-cooled side plates are enclosed along the edge of the liquid-cooled bottom plate to form the accommodating space, and the liquid-cooled cavity of the liquid-cooled bottom plate and the liquid-cooled cavities of the plurality of liquid-cooled side plates are independent of each other.

14. The liquid-cooled battery pack according to claim 13, characterized in that: The liquid-cooled battery pack also includes: A control panel is arranged on the outer side of the cover body, and the control panel is used to be electrically connected to the battery module to control the battery module.

15. The liquid-cooled battery pack according to claim 14, characterized in that: The liquid cooling cavity of the liquid cooling side plate arranged opposite to the control panel is independent of the liquid cooling cavities of the other multiple liquid cooling side plates.

16. The liquid-cooled battery pack according to claim 12, characterized in that: The flow channel of the liquid cooling cavity of the liquid cooling side plate includes a unidirectional flow channel.

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