A battery pack bracket and manufacturing method thereof, battery and power-using device

Abstract

The embodiments of the present application provide a battery pack bracket and a manufacturing method thereof, a battery and an electrical device, and belong to the technical field of battery pack brackets. The battery pack bracket includes a substrate, and the substrate is provided with a plurality of mounting holes for mounting battery cells, and a glue injection hole connected to the mounting hole. In the present application, after the end of the battery cell is inserted into the mounting hole to form a gap between the battery cell and the mounting hole, the adhesive is injected into the gap through the glue injection hole to fix the battery cell on the substrate, so that the end of the battery cell will not be contaminated by the adhesive when inserted into the mounting hole. In addition, after the adhesive is injected into the gap, it will not be scratched by the end of the battery cell and cause congestion, so the uniformity and continuity of the adhesive in the gap is relatively high, which can improve the bonding strength between the battery cell and the substrate and improve the reliability of the connection. The present application does not need to lock the two substrates by bolts or other connectors, so no additional assembly parts are required, and the assembly efficiency is relatively high.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of battery pack brackets, and in particular to a battery pack bracket and a manufacturing method thereof, a battery, and an electrical device. Background Art

[0002] At present, the power battery cells of electric vehicles and energy storage systems mainly include cylindrical battery cells, square battery cells and soft-pack battery cells. The cylindrical wound battery cells are the earliest, most mature and most stable lithium-ion batteries. They have mature production processes, high standardization, consistency and safety of the batteries, low overall costs, and high energy density of assembled battery modules. They are widely used in electric vehicles and energy storage systems of many companies. When the existing cylindrical battery cells are assembled into modules, it is easy to cause pole pollution, and the assembled module structure strength is low. Summary of the invention

[0003] In view of the above problems, the embodiments of the present application provide a battery pack bracket and a manufacturing method thereof, a battery and an electrical device, which can reduce the possibility of pole contamination, and can improve the bonding strength between the battery cell and the substrate, thereby improving the connection reliability.

[0004] According to a first aspect of an embodiment of the present application, a battery pack bracket is provided, comprising a substrate. The substrate is provided with a plurality of mounting holes and glue injection holes for mounting battery cells. The extending direction of the mounting holes is consistent with the extending direction of the battery cells, the glue injection holes are connected to the mounting holes, and the glue injection holes are configured to allow adhesive to enter the gap between the mounting holes and the battery cells through the glue injection holes to fix the battery cells on the substrate.

[0005] Through the above scheme, after the end of the battery cell is inserted into the mounting hole and a gap is formed between the battery cell and the mounting hole, the adhesive can be injected into the gap through the glue injection hole to fix the battery cell on the substrate. Therefore, the end of the battery cell will not be contaminated by the adhesive when inserted into the mounting hole, which will affect the quality of the battery cell. Moreover, after the adhesive is injected into the gap, it will not be scratched by the end of the battery cell and cause congestion. Therefore, the uniformity and continuity of the adhesive in the gap are relatively high, which can improve the bonding strength between the battery cell and the substrate and improve the reliability of the connection. The present application does not require the two substrates to be locked by bolts or other connectors, so no additional assembly parts are required, and the assembly efficiency is relatively high.

[0006] In some embodiments, the mounting hole is trumpet-shaped, and the diameter of the end of the mounting hole close to the battery cell is smaller than the diameter of the end of the mounting hole far from the battery cell.

[0007] Through the above scheme, on the one hand, the hole wall at the end with a larger hole diameter of the mounting hole can guide the end of the battery cell to be inserted into the mounting hole, making it easier for the end of the battery cell to be inserted into the mounting hole; the hole wall at the end with a smaller hole diameter of the mounting hole can limit the position of the battery cell. On the other hand, an inclined surface can be formed on the hole wall of the mounting hole to reduce the possibility that the adhesive in the gap flows out from the first end of the mounting hole and contaminates the pole.

[0008] In some embodiments, a glue containing groove is provided on the hole wall of the mounting hole, the glue containing groove is connected to the glue injection hole, and the glue containing groove is configured to contain the adhesive injected from the glue injection hole.

[0009] By setting a glue storage groove connected to the glue injection hole on the hole wall of the mounting hole, the gap between the hole wall of the mounting hole and the battery cell is increased. This allows more adhesive to be contained in the gap, which is convenient for improving the bonding strength between the battery cell and the mounting hole. In addition, the setting of the glue storage groove allows the adhesive injected from the glue injection hole to flow more easily in the gap, thereby facilitating rapid glue application and improving the efficiency of fixing the battery cell.

[0010] In some embodiments, the glue containing groove passes through both ends of the mounting hole along the extension direction of the mounting hole.

[0011] Through the above scheme, the adhesive holding area of ​​the adhesive holding groove can be increased, so that the gap between the mounting hole and the battery cell can accommodate more adhesive to improve the bonding strength between the battery cell and the mounting hole, thereby improving the reliability of fixing the battery cell on the substrate.

[0012] In some embodiments, the substrate is further provided with a glue injection groove connected to the glue injection hole, the glue injection groove is used to temporarily store the adhesive and is configured to allow the adhesive to enter the glue injection hole through the glue injection groove.

[0013] Through the above scheme, when it is necessary to inject adhesive into the gap through the glue injection holes, it is only necessary to pour the adhesive into the glue injection groove once, and the adhesive can flow into the gap through each glue injection hole, and it is not necessary to inject glue into each glue injection hole one by one, which can reduce the number of glue injections, save glue injection time, and thus improve glue injection efficiency. In addition, the glue injection groove is connected to multiple glue injection holes, and the notch size of the glue injection groove is larger than the aperture of the glue injection hole, which facilitates the positioning of the glue injection head of the glue injection equipment and reduces the difficulty of glue injection.

[0014] In some embodiments, a hole wall of the mounting hole is provided with a plurality of spaced-apart limiting members along the circumferential direction, and the plurality of limiting members are used to fix the position of the battery cell in the mounting hole.

[0015] The above solution can not only fix the position of the battery cell in the mounting hole, but also increase the gap between the hole wall of the mounting hole and the battery cell, so as to accommodate more adhesive in the gap and improve the bonding strength between the battery cell and the substrate.

[0016] In some embodiments, the limiting member is wedge-shaped, and along the aperture direction of the mounting hole, the size of the end of the limiting member close to the battery cell is larger than the size of the end of the limiting member away from the battery cell.

[0017] Through the above scheme, the part of the limiting member away from the end of the battery cell can serve as a guide for the end of the battery cell to be inserted into the mounting hole, thereby facilitating the insertion of the end of the battery cell into the mounting hole; the part of the limiting member close to the end of the battery cell can clamp the battery cell in the mounting hole, thereby limiting the position of the battery cell in the mounting hole.

[0018] In some embodiments, the battery pack support further includes a cover plate having a first protrusion, and the first protrusion is used to squeeze the adhesive in the glue injection groove when the cover plate is covered on the substrate.

[0019] By arranging the first convex portion on the cover plate, when the cover plate is covered with the substrate, the first convex portion can squeeze the adhesive in the glue injection groove, making it easy to press the adhesive in the glue injection groove into the glue injection hole, thereby improving the glue injection efficiency.

[0020] In some embodiments, the first protrusion is provided with a second protrusion, and the second protrusion is used to squeeze the adhesive in the glue injection hole when the cover plate is covered on the substrate.

[0021] By arranging the second convex portion on the first convex portion, when the cover plate and the substrate are covered, the second convex portion can extend into the glue injection hole and squeeze the adhesive in the glue injection hole, so as to facilitate the adhesive in the glue injection hole to be quickly squeezed into the gap between the battery cell and the hole wall of the mounting hole, thereby improving the efficiency of fixing the battery cell.

[0022] In some embodiments, the cover plate is provided with a glue overflow groove, and the glue overflow groove is used to accommodate the squeezed adhesive when the cover plate is covered on the substrate.

[0023] Through the above solution, the adhesive overflowing from the glue injection groove when the cover plate and the substrate are covered can be contained, reducing the risk of the adhesive overflowing and contaminating other components. In addition, the adhesive overflowing from the glue injection groove is contained in the overflow glue groove, which can also increase the bonding surface between the cover plate and the substrate and improve the bonding strength between the cover plate and the substrate.

[0024] In some embodiments, the hole wall of the mounting hole includes a first portion and a second portion, and an interface between the first portion and the second portion is parallel to a surface of the substrate;

[0025] Along the extending direction of the mounting hole, the size of the first portion is smaller than the size of the second portion.

[0026] Through the above solution, the hole wall of the second part that exceeds the first part can be used as a base to support multiple battery cells. This part of the hole wall can also guide the end of the battery cell to be inserted into the mounting hole. In addition, this part of the hole wall can also increase the bonding area between the mounting hole and the battery cell, and improve the bonding strength between the two.

[0027] According to a second aspect of the embodiment of the present application, there is provided a battery, comprising: a plurality of battery cells arranged side by side and two battery pack brackets in the first aspect at opposite positions;

[0028] The multiple mounting holes on the two substrates are opposite to each other. One end of the battery cell is mounted in a mounting hole on one substrate, and the other end of the battery cell is mounted in a corresponding mounting hole on the other substrate.

[0029] According to a third aspect of an embodiment of the present application, there is provided an electrical device comprising the battery in the second aspect.

[0030] According to a fourth aspect of an embodiment of the present application, a method for manufacturing a battery pack bracket is provided, the method comprising:

[0031] Two substrates are provided which are located opposite to each other. Both substrates are provided with a plurality of mounting holes for mounting battery cells and glue injection holes connected to the mounting holes. The extending direction of the mounting holes is consistent with the extending direction of the battery cells. The plurality of mounting holes on the two substrates are opposite to each other.

[0032] Insert one end of the battery cell into a mounting hole on one substrate, and insert the other end of the battery cell into a corresponding mounting hole on another substrate;

[0033] The adhesive is injected from the glue injection hole into the gap between the mounting hole and the battery cell to fix the battery cell on the substrate.

[0034] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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 creative work.

[0036] Figure 1 A schematic structural diagram of a car provided in an embodiment of the present application.

[0037] Figure 2 A schematic diagram of the structure of a battery provided in an embodiment of the present application.

[0038] Figure 3 A schematic diagram of the structure of a battery cell provided in an embodiment of the present application.

[0039] Figure 4 A schematic diagram of the structure of another battery provided in an embodiment of the present application.

[0040] Figure 5 A schematic diagram of the partial structure of a substrate provided in an embodiment of the present application.

[0041] Figure 6 A schematic structural diagram of a substrate provided in an embodiment of the present application.

[0042] Figure 7 A schematic structural diagram of a cover plate provided in an embodiment of the present application.

[0043] Figure 8 A schematic diagram of the partial structure of a cover plate provided in an embodiment of the present application.

[0044] Fig. 9 A schematic diagram of the partial structure of another cover plate provided in an embodiment of the present application.

[0045] Fig.10 A schematic flow chart of a method for manufacturing a battery pack bracket provided in an embodiment of the present application.

[0046] Fig.11 A schematic structural diagram of a battery pack bracket manufacturing device provided in an embodiment of the present application.

[0047] Description of reference numerals:

[0048] 00-car, 1-battery, 11-box, 11a-first box part, 11b-second box part, 11c-inner space, 12-battery cell, 121-end cover, 121a-pole, 122-shell, 123-electrode assembly, 2-controller, 3-motor;

[0049] 4-substrate, 41-mounting hole, 41a-glue storage groove, 41b-first part, 41c-second part, 42-glue injection hole, 43-glue injection groove, 44-limiting member;

[0050] 5-cover plate, 51-first convex portion, 52-second convex portion, 53-glue overflow groove. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0053] The terms "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.

[0054] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0055] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0056] The directional words appearing in the following description are all directions shown in the drawings, and do not limit the specific structure of the battery pack bracket of the present application. For example, in the description of the present application, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "radial", "circumferential" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application.

[0057] In addition, the terms "first", "second", etc. in the specification 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 of the features.

[0058] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0059] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. The "connection" or "connection" of a circuit structure may refer to an electrical connection or a signal connection in addition to a physical connection. For example, it may be a direct connection, that is, a physical connection, or it may be an indirect connection through at least one intermediate element, as long as the circuit is connected, or it may be the internal connection of two elements; the signal connection may refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] After the battery cells are manufactured, multiple battery cells are assembled to form a battery pack, and then the battery pack is installed in a battery box to form a battery.

[0061] In some related technologies, when assembling multiple battery cells into a group, multiple mounting holes for mounting battery cells are set on two opposite substrates, and the mounting holes on the two substrates correspond to each other. The two ends of the battery cells are respectively inserted into two opposite mounting holes on the two substrates, and then the two substrates are locked at different positions by multiple bolts or other connecting parts to fix the multiple battery cells between the two substrates. However, this assembly method requires more assembly parts, resulting in low assembly efficiency. In addition, this assembly method has low connection strength and low battery safety.

[0062] There are also some related technologies that first apply adhesive to the hole wall of the mounting hole, and then insert the two ends of the battery cell into two mounting holes on two substrates that are located opposite to each other, so as to fix the two ends of the battery cell on the two substrates through the adhesive, thereby fixing the battery cell on the substrate. However, through this assembly method, when the end of the battery cell is inserted into the mounting hole coated with adhesive, the end of the battery cell will scratch the hole wall of the mounting hole, making the adhesive on the hole wall easily bulge and be destroyed, and some hole walls even have no adhesive, so it is impossible to ensure the uniformity and continuity of the adhesive between the side wall of the battery cell and the hole wall of the mounting hole, which will seriously affect the bonding strength between the battery cell and the substrate, resulting in an unreliable connection. In addition, when the end of the battery cell is inserted into the mounting hole coated with adhesive, the pole at the end is easily contaminated by the adhesive, affecting the quality of the battery cell.

[0063] Based on this, an embodiment of the present application provides a battery pack bracket, the substrate of the bracket is provided with a plurality of mounting holes for mounting battery cells, and the substrate is also provided with a glue injection hole, which is connected to the mounting hole. The present application can inject adhesive into the gap between the mounting hole and the battery cell through the glue injection hole to fix the battery cell on the substrate. It can be seen that the present application injects adhesive into the gap after the end of the battery cell is inserted into the mounting hole to form a gap. As a result, the end of the battery cell will not be contaminated by the adhesive when inserted into the mounting hole, which will affect the quality of the battery cell, and after the adhesive is injected into the gap, it will not be scratched by the end of the battery cell and cause congestion, so the uniformity and continuity of the adhesive in the gap is relatively high, which can improve the bonding strength between the battery cell and the substrate and improve the reliability of the connection. The present application does not need to lock the two substrates by bolts or other connectors, so no additional assembly parts are required, and the assembly efficiency is relatively high.

[0064] The battery pack bracket described in the embodiment of the present application is suitable for batteries and electrical devices using batteries.

[0065] A battery refers to a single physical module that includes one or more battery cells to provide a higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack, etc. And the battery mentioned in this application may be a cylindrical battery. The battery generally includes a battery case for encapsulating one or more battery cells. The battery case can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0066] The electrical device may be a car, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The car may be a fuel car, a gas car, or a new energy car, and the new energy car may be a pure electric car, a hybrid car, or an extended-range car, and the like; the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, and the like; the electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0067] For the convenience of description, the following embodiments are described by taking the electrical device as a car as an example.

[0068] See also Figure 1 , Figure 1 A schematic diagram of the structure of a car 00 provided in some embodiments of the present application.

[0069] like Figure 1 As shown, the car 00 can be a fuel car, a gas car or a new energy car. The new energy car can be a pure electric car, a hybrid car or an extended-range car, etc. The car 00 includes a battery 1, a controller 2 and a motor 3. The battery 1 is used to supply power to the controller 2 and the motor 3 as the operating power source and driving power source of the car 00. For example, the battery 1 is used for the working power requirements of the car 00 during startup, navigation and operation. For example, the battery 1 supplies power to the controller 2, the controller 2 controls the battery 1 to supply power to the motor 3, and the motor 3 receives and uses the power of the battery 1 as the driving power source of the car 00, replacing or partially replacing fuel or natural gas to provide driving power for the car 00.

[0070] See also Figure 2 , Figure 2 Schematic diagram of an explosion of the battery 1 provided in some embodiments of the present application.

[0071] like Figure 2As shown, the battery 1 includes a box body 11 and a battery cell 12. The box body 11 is used to accommodate the battery cell 12, and the box body 11 can be of various structures. In some embodiments, the box body 11 can include a first box body portion 11a and a second box body portion 11b, the first box body portion 11a and the second box body portion 11b cover each other, and the first box body portion 11a and the second box body portion 11b jointly define an internal space 11c for accommodating the battery cell 12. The second box body portion 11b can be a hollow structure with one end open, the first box body portion 11a is a plate-like structure, and the first box body portion 11a covers the open side of the second box body portion 11b to form a box body 11 with an internal space 11c; the first box body portion 11a and the second box body portion 11b can also be hollow structures with one side open, and the open side of the first box body portion 11a covers the open side of the second box body portion 11b to form a box body 11 with an internal space 11c. Of course, the first box body portion 11a and the second box body portion 11b can be in various shapes, such as a cylinder, a cuboid, etc.

[0072] Assuming that the first box body portion 11a covers the top of the second box body portion 11b, the first box body portion 11a can also be called an upper box cover, and the second box body portion 11b can also be called a lower box.

[0073] exist Figure 2 In the embodiment, there are multiple battery cells 12. Multiple battery cells 12 can be connected in series, in parallel or in a mixed connection. The mixed connection means that multiple battery cells 12 are connected in series and in parallel. Multiple battery cells 12 can be directly connected in series, in parallel or in a mixed connection, and then the whole formed by the multiple battery cells 12 is accommodated in the box 11; of course, multiple battery cells 12 can be first connected in series, in parallel or in a mixed connection to form a battery module, and then the multiple battery modules are connected in series, in parallel or in a mixed connection to form a whole, and are accommodated in the box 11. In some embodiments, there are multiple battery cells 12, and multiple battery cells 12 are first connected in series, in parallel or in a mixed connection to form a battery module. Multiple battery modules are then connected in series, in parallel or in a mixed connection to form a whole, and are accommodated in the box 11.

[0074] See also Figure 3 , Figure 3 This is a schematic diagram of the structure of a battery cell 12 provided in some embodiments of the present application.

[0075] Figure 3 The schematic diagram of the decomposed structure of the battery cell 12 provided in some embodiments of the present application. The battery cell 12 refers to the smallest unit that constitutes the battery. Figure 3 The battery cell 12 includes an end cover 121 , a shell 122 and an electrode assembly 123 .

[0076] The end cap 121 refers to a component that covers the opening of the shell 122 to isolate the internal environment of the battery cell 12 from the external environment. Without limitation, the shape of the end cap 121 can be adapted to the shape of the shell 122 to match the shell 122. Optionally, the end cap 121 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 121 is not easily deformed when squeezed and collided, so that the battery cell 12 can have a higher structural strength and the safety performance can also be improved. Functional components such as poles 121a can be provided on the end cap 121. The pole 121a can be used to electrically connect to the electrode assembly 123 for outputting or inputting electrical energy of the battery cell 12. In some embodiments, the end cap 121 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 12 reaches a threshold. The material of the end cap 121 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 121, and the insulating member may be used to isolate the electrical connection components in the housing 122 from the end cap 121 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0077] The shell 122 is a component used to cooperate with the end cap 121 to form the internal environment of the battery cell 12, wherein the formed internal environment can be used to accommodate the electrode assembly 123, the electrolyte (not shown in the figure) and other components. The shell 122 and the end cap 121 can be independent components, and an opening can be set on the shell 122, and the internal environment of the battery cell 12 is formed by covering the opening with the end cap 121 at the opening. Without limitation, the end cap 121 and the shell 122 can also be integrated. Specifically, the end cap 121 and the shell 122 can form a common connection surface before other components are put into the shell, and when it is necessary to encapsulate the interior of the shell 122, the end cap 121 covers the shell 122. The shell 122 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 122 can be determined according to the specific shape and size of the electrode assembly 123. The shell 122 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special limitation on this.

[0078] The electrode assembly 123 is a component in the battery cell 12 where electrochemical reactions occur. One or more electrode assemblies 123 may be included in the housing 122. The electrode assembly 123 is mainly formed by winding or stacking the positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active substances constitute the main body of the battery cell assembly, and the parts of the positive and negative electrode sheets without active substances each constitute a pole ear (not shown in the figure). The positive pole ear and the negative pole ear may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active substance and the negative active substance react with the electrolyte, and the pole ear connects the pole 121a to form a current loop.

[0079] The battery pack bracket provided in the embodiment of the present application is explained in detail below with reference to the accompanying drawings.

[0080] Figure 4 A schematic diagram of the structure of a battery provided in an embodiment of the present application, Figure 5 Schematic diagram of a partial structure of a substrate 4 provided in an embodiment of the present application. Figure 4 and Figure 5 As shown, the battery pack bracket includes a substrate 4. The substrate 4 is provided with a plurality of mounting holes 41 for mounting the battery cells 12, and the extending direction of the mounting holes 41 is consistent with the extending direction of the battery cells 12. The substrate 4 is also provided with a glue injection hole 42, which is connected to the mounting hole 41, and the glue injection hole 42 is configured to allow the adhesive to enter the gap between the mounting hole 41 and the battery cell 12 through the glue injection hole 42, so as to fix the battery cell 12 on the substrate 4.

[0081] The battery pack bracket provided in the embodiment of the present application includes two substrates 4 located opposite to each other, and the structures of the two substrates 4 may be the same. The positions of the mounting holes 41 on the two substrates 4 are opposite to each other, and the two ends of a battery cell 12 can be supported by a pair of mounting holes 41 located opposite to each other on the two substrates 4, and the two ends of multiple battery cells 12 can be supported by multiple pairs of mounting holes 41 located opposite to each other on the two substrates 4. Therefore, the battery pack bracket provided in the embodiment of the present application can be used to fix multiple battery cells 12 to form a battery pack. The battery pack may be a cylindrical module.

[0082] The following will take one of the substrates 4 as an example to describe the structure of the substrate 4 in detail. The structural description of the other substrate 4 can refer to the structural description of this substrate 4.

[0083] The substrate 4 has a first end and a second end that are opposite to each other, wherein the first end of one substrate 4 is far away from the other substrate 4 , and the second end is close to the other substrate 4 .

[0084] In order to facilitate the mounting hole 41 to support the end of the battery cell 12, the mounting hole 41 can pass through the first end and the second end of the substrate 4, and the extension direction of the mounting hole 41 can be consistent with the extension direction of the battery cell 12. The shape of the mounting hole 41 can be consistent with the shape of the battery cell 12 fixed by the substrate 4. For example, when the battery cell 12 fixed by the substrate 4 is a cylindrical battery cell 12, the mounting hole 41 can be a cylindrical hole. The number of mounting holes 41 on the substrate 4 can be set according to the number of battery cells 12 in the battery pack. For example, if 72 battery cells 12 need to be fixed by the substrate 4 to form a battery pack, the number of mounting holes 41 on the substrate 4 can be 72.

[0085] The plurality of mounting holes 41 may be arranged in a certain arrangement rule on the substrate 4. For example, the plurality of mounting holes 41 may be arranged in rows, columns, or honeycomb-shaped on the substrate 4. The number of rows of mounting holes 41 on the substrate 4 may be one row or multiple rows, which is not limited in the embodiment of the present application.

[0086] The substrate 4 also has a first plate surface and a second plate surface that are opposite to each other. The first plate surface and the second plate surface are parallel to the shell wall of the battery cell 12, and are perpendicular to the end surfaces of the first end and the second end of the substrate 4. The first plate surface and the second plate surface can be provided with glue injection holes 42. The number of glue injection holes 42 on each plate surface can be equal to the number of mounting holes 41 in the adjacent row of the plate surface, and the glue injection holes 42 on each plate surface correspond one by one to the mounting holes 41 connected to the glue injection holes 42. Among them, the mounting holes 41 in the adjacent row of a plate surface refers to a row of mounting holes 41 close to the plate surface.

[0087] For example, when the number of rows of mounting holes 41 on the substrate 4 is one row, the mounting holes 41 in this row are both the mounting holes 41 in the row adjacent to the first board surface and the mounting holes 41 in the row adjacent to the second board surface. When the number of mounting holes 41 in this row is 36, the number of glue injection holes 42 on the first board surface and the second board surface can both be 36, and the 36 glue injection holes 42 on the first board surface and the 36 glue injection holes 42 on the second board surface are all connected one by one with the mounting holes 41 in this row.

[0088] When the number of rows of mounting holes 41 on the substrate 4 is more than two, if the row of mounting holes 41 closest to the first board surface is called the upper mounting holes, and the row of mounting holes 41 closest to the second board surface is called the lower mounting holes, then the upper mounting holes are the mounting holes 41 in the row adjacent to the first board surface, and the lower mounting holes are the mounting holes 41 in the row adjacent to the second board surface. The number of glue injection holes 42 on the first board surface can be equal to the number of upper mounting holes, and the glue injection holes 42 on the first board surface are connected to the upper mounting holes at corresponding positions; the number of glue injection holes 42 on the second board surface can be equal to the number of lower mounting holes, and the glue injection holes 42 on the second board surface are connected to the lower mounting holes at corresponding positions.

[0089] The extension direction of the glue injection hole 42 can be perpendicular to the extension direction of the mounting hole 41, and each mounting hole 41 has a glue injection hole 42 connected thereto. The cross-sectional shape of the glue injection hole 42 can be square, diamond, circular, etc. The projection of the glue injection hole 42 in its extension direction can fall completely into the mounting hole 41, so that the glue injection hole 42 is completely connected with the mounting hole 41; the projection of the glue injection hole 42 in its extension direction can also partially fall into the mounting hole 41, so that the glue injection hole 42 is partially connected with the mounting hole 41.

[0090] In the embodiment of the present application, the substrate 4 of the bracket is provided with a plurality of mounting holes 41 for mounting the battery cell 12, and the substrate 4 is also provided with a glue injection hole 42 connected to the mounting hole 41. The present application can inject adhesive into the gap between the mounting hole 41 and the battery cell 12 through the glue injection hole 42 to fix the battery cell 12 on the substrate 4. It can be seen that the present application is to inject adhesive into the gap to fix the battery cell 12 after the end of the battery cell 12 is inserted into the mounting hole 41 to form a gap. As a result, the end of the battery cell 12 will not be contaminated by the adhesive when inserted into the mounting hole 41, thereby affecting the quality of the battery cell 12, and after the adhesive is injected into the gap, it will not be scratched by the end of the battery cell 12 and cause congestion, so the uniformity and continuity of the adhesive in the gap is high, which can improve the bonding strength between the battery cell 12 and the substrate 4, and improve the connection reliability. The present application does not need to lock the two substrates 4 by bolts or other connectors, so no additional assembly parts are required, and the assembly efficiency is high.

[0091] In addition, in the present application, both the first plate surface and the second plate surface can be provided with glue injection holes 42, and adhesive can be injected into the gap between the mounting hole 41 and the battery cell 12 through the glue injection holes 42 on the first plate surface and the glue injection holes 42 on the second plate surface at the same time, thereby improving the injection efficiency of the adhesive, thereby improving the fixing efficiency of the battery cell 12 on the substrate 4.

[0092] In some embodiments, Figure 6 As shown, the mounting hole 41 may be trumpet-shaped, and the diameter of the end of the mounting hole 41 close to the battery cell 12 is smaller than the diameter of the end of the mounting hole 41 away from the battery cell 12 .

[0093] The battery cell 12 has two ends that are opposite to each other, and the two ends are respectively fixed in a pair of opposite mounting holes 41 in the two substrates 4. The mounting hole 41 has a first end and a second end that are opposite to each other along its extension direction, wherein the first end of the mounting hole 41 is the end of the mounting hole 41 that is close to the end of the battery cell 12, and the second end of the mounting hole 41 is the end of the mounting hole 41 that is away from the end of the battery cell 12. When the end of the battery cell 12 is fixed in the mounting hole 41, the first end of the mounting hole 41, the first end of the substrate 4, and the end surface of the battery cell 12 are coplanar. Based on this, the aperture of the end of the mounting hole 41 that is close to the battery cell 12 refers to the aperture of the first end of the mounting hole 41, and the aperture of the end of the mounting hole 41 that is away from the battery cell 12 refers to the aperture of the second end of the mounting hole 41.

[0094] The mounting hole 41 is trumpet-shaped, which means that the diameter of the mounting hole 41 changes along the extension direction of the mounting hole 41. The change can be that the diameter of the mounting hole 41 increases from the first end of the mounting hole 41 to the second end of the mounting hole 41, and can gradually increase at a certain rate of change. In this way, the hole wall of the mounting hole 41 is an inclined curved surface from the first end to the second end of the mounting hole 41, guiding the adhesive in the gap to flow only along the hole wall of the first end of the mounting hole 41 to the hole wall of the second end of the mounting hole 41, and will not flow along the hole wall of the second end of the mounting hole 41 to the hole wall of the first end of the mounting hole 41, thereby reducing the possibility that the adhesive in the gap flows out from the first end of the mounting hole 41 and contaminates the pole 121a set at the end of the battery cell 12. Among them, the hole diameter of the mounting hole 41 can be set according to the diameter of the end of the battery cell 12.

[0095] By setting the mounting hole 41 to be trumpet-shaped, and the hole diameter of the end of the mounting hole 41 close to the battery cell 12 is smaller than the hole diameter of the end of the mounting hole 41 far from the battery cell 12, on the one hand, the hole wall at the end with a larger hole diameter of the mounting hole 41 can guide the end of the battery cell 12 to be inserted into the mounting hole 41, making it easier for the end of the battery cell 12 to be inserted into the mounting hole 41; the hole wall at the end with a smaller hole diameter of the mounting hole 41 can limit the position of the battery cell 12. On the other hand, an inclined surface can be formed on the hole wall of the mounting hole 41 to reduce the possibility that the adhesive in the gap flows out from the first end of the mounting hole 41 and contaminates the pole 121a.

[0096] In some embodiments, Figure 5 As shown, the hole wall of the mounting hole 41 may be provided with a glue containing groove 41 a. The glue containing groove 41 a is communicated with the glue injection hole 42, and the glue containing groove 41 a is configured to contain the adhesive injected from the glue injection hole 42.

[0097] The adhesive groove 41a can also be called a sink-type flow channel. The size of the adhesive groove 41a can be set according to the size of the hole wall and the requirements of the bonding strength. The larger the adhesive groove 41a is set, the greater the amount of adhesive contained, so that the bonding area between the hole wall of the mounting hole 41 and the battery cell 12 is larger, which is convenient for improving the bonding strength between the battery cell 12 and the mounting hole 41.

[0098] The glue containing groove 41a may be partially connected with the glue injection hole 42, or may be fully connected, and this is not limited in the embodiments of the present application. Partial connection means that only a portion of the projection of the glue injection hole 42 in its extension direction falls into the glue containing groove 41a, while full connection means that the projection of the glue injection hole 42 in the extension direction falls entirely into the glue containing groove 41a. Furthermore, when the glue containing groove 41a is fully connected with the glue injection hole 42, the glue containing groove 41a may be arranged directly opposite the glue injection hole 42, so that the farthest distance that the adhesive injected from the glue injection hole 42 flows in all directions of the glue containing groove 41a is the same, thereby facilitating the improvement of the uniformity of the distribution of the adhesive in the glue containing groove 41a.

[0099] When the number of rows of mounting holes on the substrate 4 is one row, the hole wall of the row of mounting holes 41 close to the first board surface may be provided with a first glue containing groove connected to the glue injection hole 42 on the first board surface, and the hole wall of the row of mounting holes 41 close to the second board surface may be provided with a second glue containing groove connected to the glue injection hole 42 on the second board surface. In this case, the first glue containing groove and the second glue containing groove may be connected or not connected, and this embodiment of the application is not limited to this.

[0100] When the number of rows of mounting holes on the substrate 4 is more than two, the hole wall of the upper mounting hole close to the first board surface may be provided with a first glue containing groove connected to the glue injection hole 42 on the first board surface, and the hole wall of the lower mounting hole close to the second board surface may be provided with a second glue containing groove connected to the glue injection hole 42 on the second board surface. In this case, the first glue containing groove and the second glue containing groove are not connected.

[0101] Regardless of the number of rows of mounting holes 41, and regardless of whether the first adhesive groove and the second adhesive groove are connected or not, the adhesive injected into the gap from the adhesive injection hole 42 on the first board surface can be contained in the first adhesive groove, and the adhesive injected into the gap from the adhesive injection hole 42 on the second board surface can be contained in the second adhesive groove. The adhesive can be evenly distributed in the first adhesive groove and the second adhesive groove, and the adhesive in the first adhesive groove and the second adhesive groove can be used to bond the battery cell 12 and the mounting holes 41.

[0102] The adhesive groove 41a connected to the adhesive injection hole 42 is provided on the hole wall of the mounting hole 41, which is equivalent to increasing the gap between the hole wall of the mounting hole 41 and the battery cell 12. This allows more adhesive to be contained in the gap, which is convenient for improving the bonding strength between the battery cell 12 and the mounting hole 41. In addition, the provision of the adhesive groove 41a allows the adhesive injected from the adhesive injection hole 42 to flow more easily in the gap, thereby facilitating rapid adhesive application and improving the efficiency of fixing the battery cell 12.

[0103] In some embodiments, the glue containing groove 41 a may pass through both ends of the mounting hole 41 along the extension direction of the mounting hole 41 .

[0104] The extending direction of the mounting hole 41 is consistent with the direction from the first end to the second end of the mounting hole 41 .

[0105] By extending the adhesive groove 41a through both ends of the mounting hole 41 along the extension direction of the mounting hole 41, the adhesive holding area of ​​the adhesive groove 41a can be increased, so that the gap between the mounting hole 41 and the battery cell 12 can accommodate more adhesive, so as to improve the bonding strength between the battery cell 12 and the mounting hole 41, thereby improving the reliability of fixing the battery cell 12 on the substrate 4.

[0106] It is worth noting that the pole 121a of the battery cell 12 is arranged at the end of the battery cell 12. When the adhesive injected from the glue injection hole 42 into the adhesive groove 41a flows out from the end of the adhesive groove 41a close to the end of the battery cell 12, there is a risk of contaminating the pole 121a. Therefore, in order to reduce the possibility of the pole 121a being contaminated by the adhesive flowing out of the adhesive groove 41a, on the basis of the embodiment in which the mounting hole 41 is arranged to be trumpet-shaped and the aperture of the end of the mounting hole 41 close to the battery cell 12 is smaller than the aperture of the end of the mounting hole 41 far from the battery cell 12, the adhesive groove 41a can be arranged to pass through both ends of the mounting hole 41 along the extension direction of the mounting hole 41.

[0107] In some embodiments, Figure 5 and Figure 6 As shown, the substrate 4 may also be provided with a glue injection groove 43 communicating with the glue injection hole 42 . The glue injection groove 43 is used to temporarily store the adhesive and is configured to allow the adhesive to enter the glue injection hole 42 through the glue injection groove 43 .

[0108] The glue injection groove 43 can be partially connected with the glue injection hole 42, or it can be fully connected, and the embodiment of the present application does not limit this. Partial connection means that only a part of the projection of the glue injection hole 42 in its extension direction falls into the glue injection groove 43, and full connection means that the projection of the glue injection hole 42 in its extension direction falls into the glue injection groove 43. Further, when the glue injection groove 43 is fully connected with the glue injection hole 42, the projection of the glue injection hole 42 along its extension direction can fall into the glue injection groove 43 in the width direction of the glue injection groove 43. In this way, the farthest distance that the adhesive on both sides of the glue injection hole 42 in the glue injection groove 43 flows to the glue injection hole 42 in the width direction of the glue injection groove 43 is the same, which is convenient for increasing the rate at which the adhesive in the glue injection groove 43 flows into the glue injection hole 42. The width direction of the glue injection groove 43 is consistent with the extension direction of the mounting hole 41.

[0109] The first plate surface and the second plate surface may be provided with a glue injection groove 43. The glue injection groove 43 on the first plate surface is connected to the multiple glue injection holes 42 on the first plate surface, and the glue injection groove 43 on the second plate surface is connected to the multiple glue injection holes 42 on the second plate surface. When it is necessary to inject adhesive into the gap through the glue injection holes 42 on the first plate surface, the adhesive can be poured into the glue injection groove 43 on the first plate surface. Under the action of gravity and other external forces, the adhesive in the glue injection groove 43 will flow from the various glue injection holes 42 connected to the glue injection groove 43 to the gap. Similarly, when it is necessary to inject adhesive into the gap through the glue injection holes 42 on the second plate surface, the adhesive can be poured into the glue injection groove 43 on the second plate surface. Under the action of gravity and other external forces, the adhesive in the glue injection groove 43 will flow from the various glue injection holes 42 connected to the glue injection groove 43 to the gap.

[0110] A glue injection groove 43 connected to the glue injection hole 42 is provided on the substrate 4. When it is necessary to inject adhesive into the gap through the glue injection hole 42, the adhesive only needs to be poured into the glue injection groove 43 once, and the adhesive can flow into the gap through each glue injection hole 42. It is not necessary to inject glue into each glue injection hole 42 one by one, which can reduce the number of glue injections, save glue injection time, and thus improve glue injection efficiency. In addition, the glue injection groove 43 is connected to multiple glue injection holes 42, and the notch size of the glue injection groove 43 is larger than the aperture of the glue injection hole 42, which facilitates the positioning of the glue injection head of the glue injection equipment and reduces the difficulty of glue injection.

[0111] In some embodiments, Figure 5 As shown, a plurality of spaced-apart limiting members 44 are provided on the hole wall of the mounting hole 41 along the circumferential direction. The plurality of limiting members 44 are used to fix the position of the battery cell 12 in the mounting hole 41 .

[0112] The number of the limiting members 44 in the mounting hole 41 may be more than two.

[0113] When there are two limit members 44 in the mounting hole 41, the positions of the two limit members 44 in the mounting hole 41 can be relative, and the battery cell 12 can be limited in the direction of the connection line of the two limit members 44 through the two limit members 44. When there are three or more limit members 44 in the mounting hole 41, these limit members 44 can be distributed circumferentially along the hole wall of the mounting hole 41 at intervals, and these limit members 44 can clamp the battery cell 12 in all directions, so the battery cell 12 can be limited in all directions through these limit members 44. Furthermore, in order to balance the forces on the battery cell 12 in all directions and improve the stability of the fixation of the battery cell 12, these limit members 44 can also be evenly distributed circumferentially along the hole wall of the mounting hole 41.

[0114] When a plurality of stoppers 44 are arranged at intervals along the circumferential direction on the hole wall of the mounting hole 41, the gap between the hole wall of the mounting hole 41 and the battery cell 12 can be increased, so that it is convenient to inject more adhesive into the gap from the glue injection hole 42, which is beneficial to improve the bonding strength between the battery cell 12 and the substrate 4. It is worth pointing out that when a plurality of stoppers 44 are arranged at intervals along the circumferential direction on the hole wall of the mounting hole 41, they are arranged on the basis that the hole wall of the mounting hole 41 is provided with a glue containing groove 41a, and the plurality of stoppers 44 can be arranged on the hole wall of the mounting hole 41 to avoid the glue containing groove 41a, so that the stoppers 44 will not occupy the glue containing space of the glue containing groove 41a, and will not reduce the glue containing amount of the glue containing groove 41a.

[0115] By arranging multiple limit members 44 at intervals along the circumferential direction of the hole wall of the mounting hole 41, not only can the position of the battery cell 12 in the mounting hole 41 be fixed, but also the gap between the hole wall of the mounting hole 41 and the battery cell 12 can be increased, making it easier to accommodate more adhesive in the gap, thereby improving the bonding strength between the battery cell 12 and the substrate 4.

[0116] In some embodiments, Figure 5 As shown, the stopper 44 may be in a wedge-shaped structure. Along the diameter direction of the mounting hole 41 , the size of the end of the stopper 44 close to the battery cell 12 is larger than the size of the end of the stopper 44 away from the battery cell 12 .

[0117] The limiting member 44 has a mounting surface connected to the hole wall, a limiting surface for supporting the battery cell 12, and a connecting surface for connecting the mounting surface and the limiting surface. The distance between the limiting surface and the mounting surface gradually decreases from the first end of the substrate 4 to the second end of the substrate 4, so that the limiting surface is inclined relative to the mounting surface.

[0118] A plurality of stoppers 44 are arranged at intervals in the mounting hole 41, and a space for supporting the battery cell 12 is formed between the inclined plurality of stoppers, and the radial dimension of the portion of the space close to the second end of the substrate 4 along the mounting hole 41 is larger than the radial dimension of the portion close to the first end of the substrate 4 along the mounting hole 41. The portion of the stopper 44 close to the second end of the substrate 4 can guide the end of the battery cell 12 to be inserted into the mounting hole 41, facilitating the end of the battery cell 12 to be inserted into the mounting hole 41; the portion of the stopper 44 close to the first end of the substrate 4 can clamp the battery cell 12 in the mounting hole 41, limiting the position of the battery cell 12 in the mounting hole 41.

[0119] In some embodiments, Figure 4 As shown, the battery pack support may further include a cover plate 5. Figures 7 to 9 As shown, the cover plate 5 has a first protrusion 51 , and the first protrusion 51 is used to squeeze the adhesive in the glue injection groove 43 when the cover plate 5 is covered on the substrate 4 .

[0120] The battery pack support provided in the embodiment of the present application may include two cover plates 5 located opposite to each other, and the structures of the two cover plates 5 may be the same. One of the two cover plates 5 is used to cover one substrate 4, and the other cover plate 5 is used to cover the other substrate 4.

[0121] The following will take one of the cover plates 5 as an example to describe the structure of the cover plate 5 in detail. The structural description of the other cover plate 5 can refer to the structural description of this cover plate 5.

[0122] If the plate surface of the cover plate 5 facing the substrate 4 is called the covering surface, the convex portion can be a convex plate protruding from the covering surface and arranged on the covering surface facing the substrate 4. The dimension of the first convex portion 51 protruding from the covering surface can be set according to the depth of the glue injection groove 43.

[0123] In some examples, the dimension of the first protrusion 51 protruding from the covering surface may be smaller than the depth of the glue injection groove 43. In this case, the amount of glue injected into the glue injection groove 43 may be set larger. When the cover plate 5 is covered with the substrate 4, the first protrusion 51 first squeezes the adhesive in the glue injection groove 43, and then the edge portion of the covering surface contacts and is limited by the edge portion of the substrate 4, and the first protrusion 51 will not be able to continue to move toward the bottom of the glue injection groove 43. In this case, the first protrusion 51 is entirely located in the glue injection groove 43, but can only partially squeeze the adhesive in the glue injection groove 43. When the amount of glue injected into the glue injection groove 43 is small, when the cover plate 5 is covered with the substrate 4, the first protrusion 51 may not be able to squeeze the adhesive in the glue injection groove 43. Among them, the edge portion of the covering surface refers to the portion of the covering surface located outside the first protrusion 51, and the edge portion of the substrate 4 refers to the portion of the substrate 4 located outside the glue injection groove 43.

[0124] In other examples, the dimension of the first protrusion 51 protruding from the covering surface can be equal to the depth of the glue injection groove 43, that is, the first protrusion 51 matches the glue injection groove 43. In this case, when the cover plate 5 is covered with the substrate 4, the first protrusion 51 first squeezes the adhesive in the glue injection groove 43, and when the first protrusion 51 moves to contact the bottom of the groove of the glue injection groove 43, the edge of the covering surface just contacts the edge of the substrate 4 and is limited. In this case, the first protrusion 51 is completely located in the glue injection groove 43 and can completely squeeze the adhesive in the glue injection groove 43. There is no requirement for the amount of glue injected in the glue injection groove 43, and the cover plate 5 and the substrate 4 can be sealed and covered, which can reduce the possibility of the adhesive in the glue injection groove 43 overflowing from between the cover plate 5 and the substrate 4. In addition, the cover plate 5 and the substrate 4 are sealed and matched, and when the substrate 4 is turned over, the cover plate 5 can play a role of blocking the glue, and the adhesive in the glue injection groove 43 will not flow out.

[0125] In some other examples, the dimension of the first protrusion 51 protruding from the covering surface may be greater than the depth of the glue injection groove 43. In this case, when the cover plate 5 is covered with the substrate 4, the first protrusion 51 first squeezes the adhesive in the glue injection groove 43, and when the first protrusion 51 moves to contact the bottom of the glue injection groove 43, the edge of the covering surface has not yet contacted the edge of the substrate 4. In this case, the first protrusion 51 is partially located in the glue injection groove 43 and can completely squeeze the adhesive in the glue injection groove 43. There is no requirement for the amount of glue injected in the glue injection groove 43, but the cover plate 5 cannot be sealed and covered with the substrate 4.

[0126] By providing the first protrusion 51 on the cover plate 5, when the cover plate 5 is covered with the substrate 4, the first protrusion 51 can squeeze the adhesive in the glue injection groove 43, so as to facilitate pressing the adhesive in the glue injection groove 43 into the glue injection hole 42, thereby improving the glue injection efficiency.

[0127] It is worth pointing out that in the embodiment of the present application, the board surface of the substrate 4 may also be connected to other components, which requires that a connection with other components be reserved on the board surface of the substrate 4. This connection cannot be used to cover the cover 5, so a notch needs to be provided at the portion of the cover 5 corresponding to the connection. In this case, the cover 5 can be arranged into multiple sections, with a certain spacing between the multiple sections of the cover 5. The figure shows a structure in which the cover 5 is arranged into two sections, but this structure does not constitute a limitation on the embodiment of the present application.

[0128] In some embodiments, Figures 7 to 9 As shown, the first protrusion 51 is provided with a second protrusion 52 , and the second protrusion 52 is used to squeeze the adhesive in the glue injection hole 42 when the cover plate 5 is covered on the substrate 4 .

[0129] The second convex portion 52 may be a convex plate that is disposed by the first convex portion 51 toward the substrate 4 and protrudes from the first convex portion 51. The size of the second convex portion 52 protruding from the first convex portion 51 may be set according to the extended size of the injection hole 42. For example, the size of the second convex portion 52 protruding from the first convex portion 51 may be less than or equal to the extended size of the injection hole 42.

[0130] The number of the second protrusions 52 can be set according to the number of the glue injection holes 42. In order to facilitate the adhesive in each glue injection hole 42 connected to the glue injection groove 43 to quickly enter the gap, the number of the second protrusions 52 can be equal to the number of the glue injection holes 42, and the positions of the second protrusions 52 can correspond to the positions of the multiple glue injection holes 42.

[0131] By providing the second protrusion 52 on the first protrusion 51, when the cover plate 5 is covered with the substrate 4, the second protrusion 52 can extend into the glue injection hole 42 and squeeze the adhesive in the glue injection hole 42, so as to facilitate the adhesive in the glue injection hole 42 to be quickly squeezed into the gap between the battery cell 12 and the hole wall of the mounting hole 41, thereby improving the efficiency of fixing the battery cell 12.

[0132] It is worth pointing out that in the embodiment of the present application, when the first protrusion 51 matches the glue injection groove 43, a second protrusion 52 can be set on the first protrusion 51, so as to simultaneously increase the rate at which the adhesive in the glue injection groove 43 enters the glue injection hole 42 and the rate at which the adhesive in the glue injection hole 42 enters the gap, thereby further improving the efficiency of fixing the battery cell 12.

[0133] In some embodiments, Figures 7 to 9 As shown, the cover plate 5 is further provided with a glue overflow groove 53 , and the glue overflow groove 53 is used to accommodate the squeezed adhesive when the cover plate 5 is covered on the substrate 4 .

[0134] The overflow glue groove 53 can be a groove set on the edge portion of the covering surface in the cover plate 5. The groove can be an annular groove or one or more straight grooves that are not connected to each other. The overflow glue groove 53 in the figure is two straight grooves that are not connected to each other and are set on the edge portion of the covering surface along the extension direction of the cover plate 5. Among them, the extension direction of the cover plate 5 is consistent with the arrangement direction of the multiple glue injection holes 42. The overflow glue groove 53 is closer to the edge of the cover plate 5 than the first protrusion 51, but does not penetrate the side of the cover plate 5. The depth of the overflow glue groove 53 can be 0.5mm, and the width of the overflow glue groove 53 can be 1mm.

[0135] The cover plate 5 is provided with an overflowing glue groove 53, which can accommodate the adhesive overflowing from the glue injection groove 43 when the cover plate 5 is covered with the substrate 4, thereby reducing the risk of the adhesive overflowing and contaminating other components. In addition, the adhesive overflowing from the glue injection groove 43 is accommodated in the overflowing glue groove 53, which can also increase the bonding surface between the cover plate 5 and the substrate 4, and improve the bonding strength between the cover plate 5 and the substrate 4.

[0136] In some embodiments, Figure 5 As shown, the hole wall of the mounting hole 41 includes a first portion 41b and a second portion 41c, and the interface between the first portion 41b and the second portion 41c is parallel to the board surface of the substrate 4. Along the extension direction of the mounting hole 41, the size of the first portion 41b is smaller than the size of the second portion 41c.

[0137] The interface between the first part 41b and the second part 41c refers to the plane where the connection between the first part 41b and the second part 41c is located. The relationship between the first part 41b and the second part 41c includes: the first part 41b and the second part 41c can be equal in size, each occupying half of the hole wall; the first part 41b can be larger than the second part 41c, the first part 41b occupies more than half of the hole wall, and the second part 41c occupies less than half of the hole wall; the first part 41b can be smaller than the second part 41c, the first part 41b occupies less than half of the hole wall, and the second part 41c occupies more than half of the hole wall.

[0138] The first part 41b and the second part 41c are flush on one side near the end of the battery cell 12. Along the extension direction of the mounting hole 41, the size of the first part 41b is smaller than the size of the second part 41c, so that the second end of the substrate 4 is stepped, and the end surface of the second end of the substrate 4 forms a stepped surface. When the first part 41b is located above the second part 41c, the hole wall of the second part 41c that exceeds the first part 41b can serve as a base to support multiple battery cells 12. In addition, the hole wall of the second part 41c that exceeds the first part 41b can also guide the end of the battery cell 12 to be inserted into the mounting hole 41. Furthermore, the hole wall of the second part 41c that exceeds the first part 41b can also carry adhesive to bond with the battery cell 12. Therefore, the hole wall of the second part 41c that exceeds the first part 41b can increase the bonding area between the mounting hole 41 and the battery cell 12, and improve the bonding strength between the two.

[0139] It is worth noting that no matter how many rows of mounting holes 41 are provided on the substrate 4, the hole wall of each row of mounting holes 41 may include a first part 41b and a second part 41c, and along the extension direction of the mounting holes 41, the size of the first part 41b may be smaller than the size of the second part 41c, so as to support multiple battery cells 12 through the second part 41c and guide the installation of multiple battery cells 12.

[0140] According to some embodiments of the present application, Figure 4As shown, the present application also provides a battery 1, comprising a plurality of battery cells 12 arranged side by side and two battery pack brackets in any of the above schemes located opposite to each other. A plurality of mounting holes 41 on two substrates 4 are opposite to each other, one end of the battery cell 12 is mounted in a mounting hole 41 on one substrate 4, and the other end of the battery cell 12 is mounted in a corresponding mounting hole 41 on the other substrate 4.

[0141] According to some embodiments of the present application, the present application further provides an electrical device, comprising the battery 1 in the above embodiment, and the battery 1 is used to provide electrical energy to the electrical device.

[0142] The electrical device may be any of the aforementioned devices or systems using the battery 1 .

[0143] According to some embodiments of the present application, see Figures 4 to 6 The present application provides a battery pack bracket, including two oppositely positioned substrates 4. Two rows of mounting holes 41 are provided on the two substrates 4, and two board surfaces of each substrate 4 are provided with glue injection holes 42 connected to the mounting holes 41. The hole wall of the upper mounting hole close to the first board surface is provided with a first glue containing groove connected to the glue injection hole 42 on the first board surface, and the hole wall of the lower mounting hole close to the second board surface is provided with a second glue containing groove connected to the glue injection hole 42 on the second board surface. Both board surfaces of each substrate 4 are provided with glue injection grooves 43 connected to the glue injection holes 42 on the board surface. Among them, the first board surface is spatially located above the second board surface. After one end of the battery cell 12 is extended into the mounting hole 41 on one substrate 4 and the other end is extended into the corresponding mounting hole 41 on the other substrate 4, adhesive can be poured into the glue injection grooves 43 on the first board surfaces of the two substrates 4, and the adhesive in the glue injection grooves 43 will flow into the first glue containing grooves through the glue injection holes 42 on the first board surface. After the gap and the first adhesive groove are filled with adhesive, the two substrates 4 can be turned over at the same time, and adhesive can be poured into the adhesive injection grooves 43 on the second board surfaces of the two substrates 4. The adhesive in the adhesive injection grooves 43 will flow into the second adhesive groove through the adhesive injection port on the second board surface. In this way, multiple battery cells 12 can be fixed in the mounting holes 41 on the two substrates 4.

[0144] Another embodiment of the present application provides a method for manufacturing a battery pack bracket, which is used to manufacture the battery pack bracket described above in the present application. Fig.10 As shown, the method can be described as follows.

[0145] S1: providing two substrates 4 that are opposite to each other, each of the two substrates 4 being provided with a plurality of mounting holes 41 for mounting the battery cells 12 and glue injection holes 42 that are in communication with the mounting holes 41 .

[0146] The extending direction of the mounting holes 41 is consistent with the extending direction of the battery cells 12 , and the multiple mounting holes 41 on the two substrates 4 are opposite to each other.

[0147] S2: insert one end of the battery cell 12 into a mounting hole 41 on one substrate 4 , and insert the other end of the battery cell 12 into a corresponding mounting hole 41 on another substrate 4 .

[0148] S3 : injecting adhesive from the adhesive injection hole 42 into the gap between the mounting hole 41 and the battery cell 12 to fix the battery cell 12 on the substrate 4 .

[0149] It should be noted that the order of the above steps is not completely in accordance with the above arrangement order. In the actual process of manufacturing the battery pack bracket, the order of the above steps can be adjusted according to the actual situation, or performed simultaneously, or other steps can be added to manufacture other components of the battery pack bracket to finally obtain the required battery pack bracket.

[0150] In addition, any method that can manufacture related components and connect related components falls within the protection scope of the embodiments of the present application, and the embodiments of the present application will not be described in detail here.

[0151] Another embodiment of the present application also provides a manufacturing device for a battery pack bracket, referring to Fig.11 , the manufacturing equipment of battery pack bracket includes:

[0152] The first providing device 1101 is used to provide two substrates 4 positioned opposite to each other. Both substrates 4 are provided with a plurality of mounting holes 41 for mounting battery cells 12 and glue injection holes 42 connected to the mounting holes 41. The extension direction of the mounting holes 41 is consistent with the extension direction of the battery cells 12. The plurality of mounting holes 41 on the two substrates 4 are opposite to each other.

[0153] The first assembling device 1102 is used to insert one end of the battery cell 12 into the mounting hole 41 on one substrate 4 , and to insert the other end of the battery cell 12 into the corresponding mounting hole 41 on another substrate 4 .

[0154] The second assembling device 1103 is used to inject adhesive from the glue injection hole 42 into the gap between the mounting hole 41 and the battery cell 12 to fix the battery cell 12 on the substrate 4 .

[0155] The specific functions and details that the above-mentioned devices for manufacturing the battery pack bracket should have have been described in detail in the corresponding battery pack bracket embodiments, so they will not be repeated here.

[0156] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0157] As described above, 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 pack bracket, characterized in that: include: A substrate, wherein the substrate is provided with a plurality of mounting holes for mounting battery cells, wherein the extending direction of the mounting holes is consistent with the extending direction of the battery cells, and the hole diameter of the end of the mounting hole close to the battery cells is smaller than the hole diameter of the end of the mounting hole far from the battery cells; The substrate is further provided with a glue injection hole, which is communicated with the mounting hole and configured to allow adhesive to enter the gap between the mounting hole and the battery cell through the glue injection hole to fix the battery cell on the substrate.

2. The battery pack bracket according to claim 1, characterized in that: The hole wall of the mounting hole is provided with a glue containing groove, the glue containing groove is communicated with the glue injection hole, and the glue containing groove is configured to contain the adhesive injected from the glue injection hole.

3. The battery pack bracket according to claim 2, characterized in that: The glue containing groove passes through two ends of the mounting hole along the extending direction of the mounting hole.

4. The battery pack bracket according to claim 1, characterized in that: The substrate is further provided with a glue injection groove communicated with the glue injection hole, the glue injection groove is used to temporarily store the adhesive and is configured to allow the adhesive to enter the glue injection hole through the glue injection groove.

5. The battery pack bracket according to any one of claims 1 to 4, characterized in that: The hole wall of the mounting hole is provided with a plurality of spaced-apart limiting members along the circumferential direction, and the plurality of limiting members are used to fix the position of the battery cell in the mounting hole.

6. The battery pack bracket according to claim 5, characterized in that: The limiting member is in a wedge-shaped structure, and along the aperture direction of the mounting hole, the size of the end of the limiting member close to the battery cell is larger than the size of the end of the limiting member away from the battery cell.

7. The battery pack bracket according to claim 4, characterized in that: The battery pack bracket also includes: The cover plate has a first convex portion, and the first convex portion is used to squeeze the adhesive in the glue injection groove when the cover plate is covered on the substrate.

8. The battery pack bracket according to claim 7, characterized in that: The first convex portion is provided with a second convex portion, and the second convex portion is used to squeeze the adhesive in the glue injection hole when the cover plate is covered on the substrate.

9. The battery pack bracket according to claim 7 or 8, characterized in that: The cover plate is provided with a glue overflow groove, and the glue overflow groove is used to accommodate the squeezed adhesive when the cover plate is covered on the substrate.

10. The battery pack bracket according to claim 1, characterized in that: The hole wall of the mounting hole includes a first portion and a second portion, and the interface between the first portion and the second portion is parallel to the plate surface of the substrate; Along the extending direction of the mounting hole, a size of the first portion is smaller than a size of the second portion.

11. A battery, characterized in that: include: A plurality of battery cells arranged side by side and two battery pack brackets as claimed in any one of claims 1 to 10 at opposite positions; The plurality of mounting holes on the two substrates are opposite to each other, one end of the battery cell is mounted in one mounting hole on one substrate, and the other end of the battery cell is mounted in a corresponding mounting hole on the other substrate.

12. An electrical device, characterized in that: Comprising the battery of claim 11.

13. A method for manufacturing a battery pack bracket, characterized in that: include: Two substrates are provided which are located opposite to each other. The two substrates are provided with a plurality of mounting holes for mounting battery cells and glue injection holes which are connected to the mounting holes. The extending direction of the mounting holes is consistent with the extending direction of the battery cells. The diameter of the end of the mounting hole close to the battery cells is smaller than the diameter of the end of the mounting hole far from the battery cells. The plurality of mounting holes on the two substrates are opposite to each other. Insert one end of the battery cell into a mounting hole on one substrate, and insert the other end of the battery cell into a corresponding mounting hole on another substrate; Adhesive is injected from the glue injection hole into the gap between the mounting hole and the battery cell to fix the battery cell on the substrate.

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