Battery module, battery pack and electric device

Abstract

The utility model provides a battery module, a battery pack and an electric device. The battery module comprises a plurality of pre-forming units, wherein the pre-forming units are minimum assembling units participating in battery pack assembling. The pre-forming unit can comprise a battery cell group, a cold plate and a CCS unit. The battery cell group comprises a column of battery cells arranged along the first direction; the cold plate is of a plate-shaped structure extending in the first direction. The side surface of the battery cell group is adhered to the side surface of the cold plate; the cold plate is used for cooling the battery cells. And the CCS unit is welded on the top surface of the battery cell group. The pre-forming unit is the minimum assembling unit participating in battery pack assembling. The pre-forming unit comprises a battery cell group, a cold plate and a CCS unit. According to the method, the CCS unit and the battery cell group are assembled in the box by taking one pre-forming unit as the minimum assembling unit, so that the welding operation of the CCS unit and the battery cell group is performed outside the box body of the battery pack, the times of welding operation in the battery pack can be reduced, the frequency of safety problems caused by welding in the battery pack is reduced, and the safety quality of the battery pack is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery module, a battery pack, and an electrical device. Background Art

[0002] The battery pack includes various electrical components such as a battery module. The battery module is arranged in the shell of the battery pack, and the battery module includes multiple battery cells.

[0003] In the related art, the battery cell connection system is welded to the battery cell located in the accommodating cavity, resulting in a large number of welding points between the battery cell connection system and the battery cell, which requires the operator to perform multiple welding in the battery pack, thereby increasing the frequency of safety problems caused by welding in the battery pack. Utility Model Content

[0004] The present application provides a battery module, a battery pack, and an electrical device, which avoid multiple welding operations within the battery pack, reduce the frequency of safety issues caused by welding within the battery pack, and thus improve the safety quality of the battery pack.

[0005] In a first aspect, the present application provides a battery module for use in a battery pack, wherein the battery module is placed within a housing of the battery pack. The battery module may include a plurality of prefabricated units, which are the smallest assembly units involved in the assembly of the battery pack. The prefabricated units may include a cell group, a cold plate, and a CCS unit. The cell group includes a row of cells arranged along a first direction. The cold plate is a plate-like structure extending along the first direction. The side surfaces of the cell group are bonded to the side surfaces of the cold plate, which is used to cool the cells. The CCS unit is welded to the top surface of the cell group.

[0006] The prefabricated unit provided in the first aspect is the smallest assembly unit involved in battery pack assembly. The prefabricated unit includes a cell pack, a cold plate, and a CCS unit. By using a single prefabricated unit as the smallest assembly unit for box assembly, welding operations between the CCS unit and the cell pack are performed outside the battery pack box. This reduces the number of welding operations performed inside the battery pack, lowering the frequency of safety issues arising from welding inside the battery pack, and thereby improving the safety and quality of the battery pack.

[0007] In one possible design, the prefabricated unit may include one or more battery cell groups. The cold plate may include a first side surface and a second side surface that are oppositely disposed. The battery cell group may be bonded to the first side surface and / or the second side surface.

[0008] Based on the description of the above embodiment, the cell group is bonded to the first side and / or the second side of the cold plate, so that the cell group can include at least two connection structures. The operator can select the above connection structure at will.

[0009] In one possible design, a CCS unit may include a fixing plate, a first aluminum bar, a thermal insulation pad, and an FPC. The fixing plate includes a first surface and a second surface positioned opposite each other. The first surface is welded to the top of the battery cell. The second surface is connected to the first aluminum bar. The second surface has a raised structure, and a third surface is located above the raised structure, which is not on the same level as the second surface. The thermal insulation pad is connected between the FPC and the third surface.

[0010] Based on the description of the above embodiment, the first side of the fixing plate is welded to the top of the battery cell, and the second side of the fixing plate is connected to the first aluminum bar to ensure the performance, safety, and manufacturing efficiency of the battery module. The raised structure provided on the second side of the fixing plate has a third side, and the thermal insulation pad is connected between the FPC and the third side, ensuring the normal operating temperature of the battery cell while also ensuring the performance, safety, and manufacturing efficiency of the battery module.

[0011] In a possible design, the first aluminum bar is bonded to the fixing plate. Alternatively, the first aluminum bar is riveted to the fixing plate.

[0012] Based on the description of the above embodiments, the operator can choose any of the above connection methods to connect the first aluminum bar and the fixed plate according to factors such as the specific application scenario, required mechanical properties, environmental conditions and production costs.

[0013] In one possible design, a plurality of protrusions are provided on the second surface, a first slot is provided between two adjacent protrusions, and the first aluminum bar is engaged in the first slot.

[0014] Based on the description of the above embodiment, the second surface is used to attach to the first aluminum bar, and multiple raised structures are provided on the second surface. A first slot is provided between two adjacent raised structures, allowing the first aluminum bar to be snapped into the first slot. This ensures that the upper surface of the first aluminum bar does not rise above the third surface, thereby ensuring a smooth installation of the thermal insulation pad.

[0015] In a possible design, the thermal insulation pad is fixed to the third surface by glue, and the FPC is fixed to the thermal insulation pad by glue.

[0016] Based on the description of the above embodiment, the thermal insulation pad is fixed to the third surface via glue, thereby ensuring uniform stress distribution and good sealing performance between the thermal insulation pad and the fixing plate, and facilitating structural weight reduction, improved structural rigidity, and simplified production. Similarly, the FPC is fixed to the thermal insulation pad via glue, so that the connection between the thermal insulation pad and the FPC also has the above-mentioned effects.

[0017] In a second aspect, the present application provides a battery pack comprising: a housing, a second aluminum bar, and one or more battery modules according to any of the above embodiments. The housing includes a base. The second aluminum bar and the battery module are both fixed to the base. The second aluminum bar is electrically connected to the battery module.

[0018] In a possible design, the base is provided with a plurality of second slots. The number of the second slots is the same as the number of the prefabricated units. Each prefabricated unit is snapped into a second slot.

[0019] Based on the description of the above embodiment, the second card slot is used to clip and fix the prefabricated unit on the base so that the first aluminum bar and the second aluminum bar can be stably connected, thereby allowing the current in the battery pack to flow stably.

[0020] In a possible design, when all prefabricated units are snapped into the second slots, there is a gap between two adjacent prefabricated units. The gap is used to fill glue to fix the battery module in the housing.

[0021] Based on the description of the above embodiment, glue is filled between two adjacent prefabricated units to make the installation of multiple prefabricated units on the base more stable, further ensuring the stable connection between the first aluminum bar and the second aluminum bar.

[0022] In a third aspect, the present application provides an electrical device, comprising: a battery pack according to any one of the above embodiments, wherein the battery pack is used to provide electrical energy.

[0023] The beneficial effects of the battery pack provided in the above-mentioned second aspect, the various possible designs of the above-mentioned second aspect, and the electrical device provided in the above-mentioned third aspect can be referred to the beneficial effects brought about by the above-mentioned first aspect and the various possible implementation methods of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 This is an assembly diagram of a battery cell group and a cold plate provided in an embodiment of the present application.

[0026] Figure 2 An assembly diagram of a prefabricated unit provided in an embodiment of the present application.

[0027] Figure 3 for Figure 2 exploded view.

[0028] Figure 4 This is a structural diagram of a CCS unit provided in an embodiment of the present application.

[0029] Figure 5 for Figure 4exploded view.

[0030] Figure 6 for Figure 4 Magnified view of section A.

[0031] Figure 7 A structural diagram of a battery pack provided in an embodiment of the present application.

[0032] Figure 8 for Figure 7 Magnified view of part B.

[0033] Figure 9 An assembly diagram of a prefabricated unit and a base provided in an embodiment of the present application.

[0034] Description of reference numerals:

[0035] 1. Prefabricated units;

[0036] 11. Battery cell group; 12. Cold plate;

[0037] 13. CCS unit; 131. Fixing plate; 1311. Protruding structure; 1322. First slot; 132. First aluminum bar; 133. Thermal insulation pad; 134. FPC;

[0038] 2. Base; 21. Second slot; 3. Second aluminum bar;

[0039] X, first direction. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0042] The terms "comprises", "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0043] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0044] The term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0045] The directional words appearing in the following description are all directions shown in the drawings and do not limit the specific structure of this application. For example, in the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing this application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting this application.

[0046] In addition, the expressions indicating directions such as the X direction, Y direction, and Z direction used to illustrate the operation and construction of the various components of this embodiment are not absolute but relative, and although these indications are appropriate when the various components are in the positions shown in the figures, when these positions are changed, these directions should be interpreted differently to correspond to the changes.

[0047] In addition, the terms "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more such features.

[0048] In the description of this application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two (including two).

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, "connected" or "connected" in a mechanical structure can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection via a fixing member, such as a screw, bolt, or other fixing member. A physical connection can also be a detachable connection, such as a mutual snap-fit connection. A physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. "Connected" or "connected" in a circuit structure can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate element, as long as the circuit is interconnected. It can also refer to internal communication between two elements. A signal connection can refer to a signal connection through a circuit or a signal connection through a media medium, such as radio waves. Those skilled in the art will understand the specific meanings of the above terms in this application.

[0050] An electrical device refers to an electrical device that uses electricity to perform specific functions. These devices may include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, and so on. Electric toys may include fixed or mobile electric toys, such as game consoles, electric cars, electric ships, and electric airplanes. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft. These devices are connected to a power source to provide various functions or services.

[0051] The battery pack is the core device used to power electrical devices. The battery pack (PACK) can include a housing with a storage cavity, a thermal management system, a battery management system (BMS), and multiple battery modules. The thermal management system, battery management system, and multiple battery modules are all located in the storage cavity.

[0052] A battery module includes multiple cells, which are electrically connected to each other via a cell contact system (CCS).

[0053] In related art, a battery module consisting of multiple cells is fixed in the aforementioned accommodating cavity, and a cell connection system is welded to the cells located in the accommodating cavity. The battery pack includes multiple cells, resulting in a large number of welds between the cell connection system and the cells. This large number of welds requires operators to perform multiple welds within the battery pack, increasing the frequency of safety issues caused by welding within the battery pack.

[0054] Based on this, the present application provides a battery module that avoids multiple welding in the battery pack by pre-welding the cell connection system on the battery module, thereby reducing the frequency of safety problems caused by welding in the battery pack and improving the safety quality of the battery pack. Figures 1-9 Provide a detailed description.

[0055] like Figure 1-Figure 3 As shown, the first aspect of the present application provides a battery module (not shown in the figure) for use in a battery pack (not shown in the figure). The battery module is placed in a shell (not shown in the figure) of the battery pack. The battery module may include a plurality of prefabricated units 1, which are the minimum assembly units involved in the assembly of the battery pack. The prefabricated unit 1 may include a cell group 11, a cold plate 12, and a CCS unit 13. The cell group 11 includes a row of cells arranged along a first direction X. The cold plate 12 is a plate-like structure extending along the first direction X. The side of the cell group 11 is bonded to the side of the cold plate 12, and the cold plate 12 is used to cool the cell. The CCS unit 13 is welded to the top surface of the cell group 11.

[0056] like Figure 1 As shown, the battery cell group 11 may be a row of cylindrical battery cells arranged along a first direction X. A row of cylindrical battery cells may include a plurality of cylindrical battery cell units. For example, ten cylindrical battery cell units are arranged in a row along the first direction X to form the battery cell group 11.

[0057] The cold plate 12 is provided with microchannels or serpentine channels inside. The coolant flows through the channels in the cold plate 12 to take away the heat generated by the battery cells, thereby achieving control of the temperature of the battery cells.

[0058] like Figure 2 and Figure 3 As shown, the CCS unit 13 is welded to the top surface of the cell group 11 and is used to connect multiple cylindrical cell units within the cell group 11, so that the cylindrical cell units are connected in series or in parallel. Specifically, the CCS unit 13 can be the smallest assembly unit of the cell connection system, and the cells can be connected in parallel or in series by arranging different CCS units 13.

[0059] Placing the battery module in the battery pack housing is a step in the battery pack assembly process, which can be simply referred to as battery module placement. Furthermore, the prefabricated unit 1 can be the smallest assembly unit involved in battery pack assembly. It is understood that the CCS unit 13 is already welded to the cell group 11 before the battery module is placed in the box, and the CCS unit 13, cell group 11, and cold plate 12 form the prefabricated unit 1.

[0060] In the related art, the battery cell group 11 and the cold plate 12 form a minimum assembly unit and are then put into a box. Multiple of the above minimum assembly units are arranged into a battery module in the box of the battery pack, and then the multiple CCS units 13 in the battery cell connection system are welded to the top of the battery cell group 11 respectively. It can be understood that in the above scheme, the CCS unit 13 is welded to the battery cell group 11 in the box of the battery pack after the battery module is put into the box. The battery module includes multiple of the above minimum assembly units, so the welding action between the CCS unit 13 and the battery cell group 11 needs to be repeated multiple times. Furthermore, in addition to the battery module, the battery pack also includes various electrical equipment such as the thermal management system and the battery management system. Multiple welding operations will cause the electrical equipment in the battery pack to have a short circuit risk. Based on this, after the CCS unit 13, the battery cell group 11 and the cold plate 12 are formed into a prefabricated unit 1, one prefabricated unit 1 is used as the minimum assembly unit for box assembly, so that the welding operation of the CCS unit 13 and the battery cell group 11 is carried out outside the battery pack box, which can reduce the number of welding operations inside the battery pack and reduce the frequency of safety problems caused by welding inside the battery pack, thereby improving the safety quality of the battery pack.

[0061] In summary, prefabricated unit 1 is the smallest assembly unit involved in battery pack assembly. It includes a cell group 11, a cold plate 12, and a CCS unit 13. Using a single prefabricated unit 1 as the smallest assembly unit for box assembly allows welding of the CCS unit 13 and cell group 11 to be performed outside the battery pack box. This reduces the number of welding operations performed inside the battery pack, lowering the frequency of safety issues caused by welding inside the battery pack, and thus improving the safety and quality of the battery pack.

[0062] In some embodiments, the prefabricated unit 1 may include one or more battery cell groups 11. The cold plate 12 includes a first side surface and a second side surface that are opposite to each other. The battery cell groups 11 are bonded to the first side surface and / or the second side surface.

[0063] Specifically, the battery cell group 11 and the cold plate 12 may include but are not limited to the following two connection structures:

[0064] Connection structure 1: The prefabricated unit 1 includes a cell group 11 and a cold plate 12, with the side of the cell group 11 bonded to the first side or the second side of the cold plate 12. One cell group 11 is cooled by one cold plate 12, which improves the cooling speed.

[0065] Connection Structure 2: The prefabricated unit 1 includes two cell groups 11 and a cold plate 12. One cell group 11 is bonded to a first side of the cold plate 12, while the other cell group 11 is bonded to a second side of the cold plate 12. The two cell groups 11 share a common cold plate 12, reducing production costs.

[0066] In summary, the cell group 11 is bonded to the first side surface and / or the second side surface of the cold plate 12, so that the cell group 11 can include at least two connection structures. The operator can select the above connection structure.

[0067] In some embodiments, as Figure 4 and Figure 5 As shown, the CCS unit 13 may include a fixing plate 131, a first aluminum bar 132, a thermal insulation pad 133, and an FPC 134. The fixing plate 131 includes a first surface and a second surface positioned opposite each other. The first surface is welded to the top of the battery cell. The second surface is connected to the first aluminum bar 132. A raised structure 1311 is provided on the second surface, and a third surface is located above the raised structure 1311, which is not on the same horizontal plane as the second surface. The thermal insulation pad 133 is connected between the FPC 134 and the third surface.

[0068] The fixing plate 131 is used to fix the first aluminum bar 132 to the battery cell to ensure good electrical connection and mechanical support. Specifically, the fixing plate 131 needs to have good electrical conductivity, sufficient mechanical strength, good thermal stability and chemical stability to avoid reaction with electrolytes or other chemicals.

[0069] The first aluminum bar 132 refers to a soft connector made of aluminum foil material for electrical connection, which is used to achieve electrical connection.

[0070] Furthermore, an electrochemical reaction may occur between the first aluminum bar 132 and the battery cell, forming a conductive path. This could increase the battery's discharge rate or cause uncontrolled discharge, impacting battery performance and lifespan. Furthermore, the first aluminum bar 132 is made of aluminum foil, which has low hardness. Direct connection between the first aluminum bar 132 and the battery cell can result in unstable connection strength under mechanical stress. Therefore, a fixing plate 131 is provided between the first aluminum bar 132 and the battery cell to ensure battery module performance, safety, and manufacturing efficiency.

[0071] The material of the thermal insulation pad 133 generally has a low thermal conductivity, which can effectively block the transfer of heat. In the battery system of a new energy vehicle, the thermal insulation pad 133 can prevent the battery from overheating and improve the safety of the system.

[0072] FPC134, short for Flexible Printed Circuit, is a specialized type of printed circuit board. Its lightweight, thin, flexible, and bendable properties make it widely used in electronic products such as mobile phones, laptops, PDAs, digital cameras, and LCD screens. FPC134 can be bent, folded, and rolled freely, making it ideal for electronic product designs requiring three-dimensional layouts.

[0073] Furthermore, a thermal insulation pad 133 is provided between the FPC 134 and the first aluminum bar 132 to prevent heat transfer and ensure the normal operating temperature of the battery cell.

[0074] As can be seen from the above, the aluminum foil's low hardness results in a direct connection between the first aluminum bar 132 and the thermal insulation pad 133, resulting in insufficient stability under mechanical stress. To address this, a raised structure 1311 is provided on the second surface of the fixing plate 131, with the thermal insulation pad 133 positioned between the FPC 134 and the third surface of the raised structure 1311, ensuring the battery module's performance, safety, and manufacturing efficiency.

[0075] In summary, the first side of the fixing plate 131 is welded to the top of the battery cell, and the second side of the fixing plate 131 is connected to the first aluminum bar 132 to ensure the performance, safety, and manufacturing efficiency of the battery module. The raised structure 1311 provided on the second side of the fixing plate 131 has a third side, and the thermal insulation pad 133 is connected between the FPC 134 and the third side, ensuring the normal operating temperature of the battery cell while also ensuring the performance, safety, and manufacturing efficiency of the battery module.

[0076] Furthermore, in some embodiments, the first aluminum bar 132 and the fixing plate 131 may be connected in the following two ways, but not limited to:

[0077] Connection method 1: The first aluminum bar 132 is bonded to the fixing plate 131. The bonding connection provides a uniform stress distribution, thereby improving the integrity and fatigue resistance of the connection between the first aluminum bar 132 and the fixing plate 131.

[0078] Connection method 2: The first aluminum bar 132 is riveted to the fixing plate 131. The riveted connection is not easily loosened due to vibration or impact, thereby improving the reliability of the connection between the first aluminum bar 132 and the fixing plate 131.

[0079] In summary, the operator can select any of the above connection methods to connect the first aluminum bar 132 and the fixing plate 131 according to factors such as the specific application scenario, required mechanical properties, environmental conditions and production costs.

[0080] Further, such as Figure 6 As shown, in some embodiments, a plurality of protrusions 1311 are provided on the second surface. A first slot 1322 is provided between two adjacent protrusions 1311. The first aluminum bar 132 is snapped into the first slot 1322.

[0081] According to the description of the above embodiment, the second surface is used to attach to the first aluminum bar 132, and multiple protrusions 1311 are provided on the second surface. A first slot 1322 is provided between two adjacent protrusions 1311, so that the first aluminum bar 132 is snapped into the first slot 1322. This ensures that the upper surface of the first aluminum bar 132 does not rise above the third surface, thereby ensuring the flatness of the thermal insulation pad 133 during installation.

[0082] Specifically, in some embodiments, the thermal insulation pad 133 is fixed to the third surface by glue. In addition, the FPC 134 is fixed to the thermal insulation pad 133 by glue.

[0083] As can be seen from the above, adhesive connections provide uniform stress distribution. Furthermore, adhesive connections offer the following advantages: First, they offer excellent sealing properties, preventing the intrusion of moisture and other corrosive substances, thereby improving the corrosion resistance of the joint. Second, adhesive connections are lightweight, eliminating the need for additional metal connectors and helping to reduce structural weight. Third, adhesive connections can increase structural rigidity, as the adhesive provides additional structural strength after curing. Fourth, adhesive connections require fewer processing steps, simplifying the production process.

[0084] In summary, thermal insulation pad 133 is secured to the third surface with glue, ensuring uniform stress distribution and good sealing performance between the connection between thermal insulation pad 133 and fixed plate 131. This also helps reduce structural weight, increase structural rigidity, and simplify the production process. Similarly, FPC 134 is secured to thermal insulation pad 133 with glue, ensuring the connection between thermal insulation pad 133 and FPC 134 also has the aforementioned effects.

[0085] like Figure 7-Figure 9 As shown, a second aspect of the present application provides a battery pack, which may include a housing, a second aluminum bar 3, and one or more battery modules according to any of the above embodiments. The housing includes a base 2. The second aluminum bar 3 and the battery module are both fixed to the base 2. The second aluminum bar 3 is electrically connected to the battery module.

[0086] The base 2 may be a plate-like structure within the housing, used to mount and support the electrical components of the battery pack, which may include battery modules, a thermal management system, and a battery management system.

[0087] like Figure 8 As shown, the electrical connection between the second aluminum bar 3 and the battery module can be specifically reflected in that the second aluminum bar 3 is connected to the first aluminum bar 132 in the battery module, so that the current in the battery module flows out through the second aluminum bar 3 to realize the circulation of current in the battery pack.

[0088] Further, such as Figure 9As shown, in some embodiments, the base 2 is provided with a plurality of second slots 21. The number of the second slots 21 is the same as the number of the prefabricated units 1. Each prefabricated unit 1 is snapped into the second slot 21.

[0089] According to the description of the above embodiment, the second card slot 21 is used to clip and fix the prefabricated unit 1 on the base 2, so that the first aluminum bar 132 and the second aluminum bar 3 can be stably connected, so that the current in the battery pack can flow stably.

[0090] Furthermore, in some embodiments, when all prefabricated units 1 are snapped into the second snap-in slots 21, there is a gap between two adjacent prefabricated units 1. The gap is used to fill glue to fix the battery module in the housing.

[0091] According to the description of the above embodiment, glue is poured between two adjacent prefabricated units 1 to ensure a more stable installation of the multiple prefabricated units 1 on the base 2, further ensuring a stable connection between the first aluminum bar 132 and the second aluminum bar 3. Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

[0092] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery module, applied to a battery pack, wherein the battery module is placed in a housing of the battery pack, characterized in that: The battery module includes: a plurality of prefabricated units, which are the smallest assembly units involved in battery packaging; The prefabricated unit includes a cell group, a cold plate and a CCS unit; The battery cell group includes a row of battery cells arranged along a first direction; The cold plate is a plate-shaped structure extending along the first direction; The side of the battery cell group is bonded to the side of the cold plate, and the cold plate is used to cool the battery cells; The CCS unit is welded on the top surface of the battery cell group.

2. The battery module according to claim 1, wherein: The prefabricated unit includes one or more battery cell groups; The cold plate includes a first side surface and a second side surface that are arranged opposite to each other; The battery cell group is bonded to the first side surface and / or the second side surface.

3. The battery module according to claim 1, wherein: The CCS unit includes a fixing plate, a first aluminum bar, a thermal insulation pad and an FPC; The fixing plate includes a first surface and a second surface that are arranged opposite to each other; The first surface is welded to the top of the battery cell; The second surface is connected to the first aluminum bar; A raised structure is provided on the second surface; There is a third surface on the raised structure, and the third surface is not on the same horizontal plane as the second surface; The thermal insulation pad is connected between the FPC and the third surface.

4. The battery module according to claim 3, characterized in that: The first aluminum bar is bonded to the fixing plate; or, The first aluminum bar is riveted to the fixing plate.

5. The battery module according to claim 3, wherein: A plurality of the protruding structures are provided on the second surface; A first slot is provided between two adjacent protrusion structures; The first aluminum bar is connected to the first slot.

6. The battery module according to claim 3, characterized in that: The thermal insulation pad is fixed to the third surface by glue; Furthermore, the FPC is fixed to the thermal insulation pad by glue.

7. A battery pack, characterized in that: A battery module comprising a housing, a second aluminum bar, and one or more battery modules according to any one of claims 1 to 6; The housing includes a base; The second aluminum bar and the battery module are both fixed on the base; The second aluminum bar is electrically connected to the battery module.

8. The battery pack according to claim 7, characterized in that: The base is provided with a plurality of second slots; The number of the second card slots is the same as the number of prefabricated units of the battery module; Each of the prefabricated units is snapped into the second slot.

9. The battery pack according to claim 8, characterized in that: When all the prefabricated units are snapped into the second snap-in slots, there is a gap between two adjacent prefabricated units; The gap is used for filling glue to fix the battery module in the shell.

10. An electrical device, characterized in that: A battery pack comprising any one of claims 7 to 9, wherein the battery pack is used to provide electrical energy.

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