Battery module and electric equipment

Abstract

The utility model relates to a battery module and electric equipment, and relates to the technical field of power batteries. The battery module comprises at least one integrated busbar, a protective pad and at least two battery cells, and any two adjacent battery cells are connected and conducted through a bar sheet. The integrated busbar is at least partially arranged between the chip and the battery cell, and the integrated busbar is electrically connected with the chip. The protective pad is arranged between the battery cells and the integrated busbar, and the protective pad covers the connection position of any two adjacent battery cells. Wherein the integrated busbar is provided with a glue injection groove, a protective glue layer is arranged in the glue injection groove, and the bar is located in the glue injection groove. The battery module provided by the utility model can solve the problem that when the battery module is protected in a top glue injection manner in the prior art, glue is easy to flow into gaps between the battery cells to cause damage to battery cell shells.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power batteries, in particular to a battery module and a power-using device. BACKGROUND

[0002] With the rapid development of the new energy industry, power batteries represented by lithium batteries have also been more and more widely used. However, due to the characteristics of power batteries, problems such as heating and even thermal runaway may occur during use. Once thermal runaway occurs in part of the battery cell, the electrolyte inside the battery cell will splash from the position of the explosion-proof valve into the battery box when the explosion-proof valve bursts, at which time the splashed electrolyte may cause the multiple components in the battery box to be interconnected, thereby causing risks such as short circuit.

[0003] In the prior art, a method of injecting glue on the top of the battery cell is usually used to form a glue injection layer to achieve a protection effect. Specifically, a liquid injection window is usually formed on the plastic uptake plate of the integrated busbar (CCS) main body to facilitate glue injection.

[0004] However, when the above protection method is used, since multiple battery cells are usually arranged in the same battery box and there are usually gaps between the battery cells, the injected glue will flow into the gaps between the battery cells, and the flowed-in glue has a certain strength after solidification, which may then pressurize the battery cell shell when the battery cell slides and is pressed, and in severe cases, the battery shell may even be punctured, resulting in risks such as liquid leakage. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the present application is to provide a battery module and a power-using device, which can solve the problem that when the battery module in the prior art is protected by injecting glue on the top, the glue easily flows into the gaps between the battery cells, causing damage to the battery cell shell.

[0006] In order to achieve the above purpose, the first aspect of the present application provides a battery module, which comprises at least an integrated busbar, a protection pad and at least two battery cells. Any two adjacent battery cells are connected in conduction through a tab. The integrated busbar is at least partially arranged between the tab and the battery cell, and the integrated busbar is electrically connected with the tab. The protection pad is arranged between the battery cell and the integrated busbar, and the protection pad covers the joint position of any two adjacent battery cells. Wherein, the integrated busbar is provided with a glue injection groove, the glue injection groove is provided with a protective glue layer, and the tab is located in the glue injection groove.

[0007] Based on the above embodiments of the application, when the battery module is in use, the battery cells are connected in sequence by the gaskets to form a battery cell module, and then the integrated busbar is connected to the gaskets, so as to measure and control the temperature and voltage data of the gaskets and the battery cells. At the same time, by opening a glue injection groove on the integrated busbar and injecting glue in the glue injection groove to form a protective glue layer, the gaskets and other structures can be coated and protected, thereby solving the problem that the electrolyte sprayed when the battery cell overheats may cause short circuit between the gaskets and between the gaskets and other structures. Further, by providing the protective pad, the protective pad is arranged between the battery cell and the integrated busbar, so as to protect the glue flowing from the integrated busbar to the battery cell, cover and close the gap position between the two adjacent battery cells, and at this time, even if part of the glue in the glue injection groove flows to the battery cell, it will not flow to the gap position between the two adjacent battery cells due to the closing protection effect of the protective pad, thereby reducing or even avoiding the possibility of damage to the battery cell shell caused by the glue flowing to the gap position of the battery cell and solidifying. That is, by cooperating the protective pad with the glue injection groove on the integrated busbar, the gaskets and other structures at the end of the battery module are protected by glue injection, and at the same time, the protective pad is isolated and protected between the integrated busbar and the battery cell, thereby solving the problem that in the prior art, when the battery module is protected by top glue injection, the glue easily flows into the gap between the battery cells, causing damage to the battery cell shell.

[0008] In some embodiments, the integrated busbar includes a substrate, the substrate is recessed away from the surface of the battery cell to form a glue injection groove, the glue injection groove includes a wire harness groove and a gasket groove, and the wire harness groove communicates with the gasket groove. The gasket is arranged in the gasket groove and connected to the integrated busbar.

[0009] Based on the above embodiments of the application, the protective glue layer formed by injecting glue in the glue injection groove can coat the gasket part and the wire harness part, on the one hand, it can improve the protection effect of the two, on the other hand, it can also reduce the risk of loosening of the connection structure of the two.

[0010] In some embodiments, the integrated busbar further includes a wire harness plug-in piece and a connecting wire harness, the connecting wire harness is arranged in the wire harness groove, one end of the connecting wire harness is connected to the gasket, and the other end of the connecting wire harness is connected to the wire harness plug-in piece, and the wire harness plug-in piece is used to connect with the outside of the battery module.

[0011] Based on the above embodiments of this application, the integrated busbar needs to collect temperature and voltage data of the battery cells and their locations during use. This is achieved by connecting one end of a wiring harness to the battery cell, with voltage and temperature sampling terminals also provided at the end of the harness for direct connection. The other end of the wiring harness is then connected to a wiring harness connector, which connects to the external battery module. Specifically, it can connect to modules such as a battery management system to analyze and process the data, and subsequently adjust the battery module based on the analysis results.

[0012] In some embodiments, a first clearance hole is provided on the protective pad, the first clearance hole penetrates the protective pad, and the terminal of the battery cell at least partially passes through the first clearance hole into the plate slot and is connected to the plate.

[0013] Based on the above embodiments of this application, the setting of the first clearance hole facilitates the connection between the electrode post and the switch plate, thereby enabling the connection and conduction between adjacent cells through the switch plate.

[0014] In some embodiments, a sealing ring is fitted on the electrode post, and the sealing ring is at least partially located inside the first clearance hole to seal the gap between the electrode post and the first clearance hole.

[0015] Based on the above embodiments of this application, the first clearance hole is designed to facilitate assembly and adapt to various cell structures, so its size needs to be slightly larger than the actual size of the cell terminal. By providing a sealing ring, the gap between the first clearance hole and the terminal can be sealed, enhancing the sealing effect and reducing the possibility of adhesive flowing onto the cell along the gap between the first clearance hole and the terminal when adhesive is injected into the injection groove.

[0016] In some embodiments, a second clearance hole is provided on the protective pad. The second clearance hole is configured as a blind hole and is opened on the wall of the protective pad facing the battery cell. The second clearance hole is positioned opposite the explosion-proof valve of the battery cell.

[0017] Based on the above embodiments of this application, by providing a second clearance hole, and the second clearance hole being configured as a blind hole structure, a cavity structure is formed between the second clearance hole, the protective pad, and the upper surface of the battery cell. This not only allows for the formation of a pressure relief space in conjunction with the explosion-proof valve, enabling stable pressure relief during battery thermal runaway, but also avoids the risk of short circuits in the battery cell and other structures caused by electrolyte directly spraying out to the integrated busbar and the battery cell when the explosion-proof valve bursts.

[0018] In some embodiments, the battery module further includes an end plate disposed at the end of the cell, and a fixing strap is provided on the end plate, the fixing strap being sleeved over the end plate and the cell.

[0019] Based on the above-mentioned embodiments of the present application, the end plate is clamped on both sides of the battery cell, thereby fixing the structure of the battery cell module as a whole, and then the end plate and the battery cell are fixed by the fixing belt from the outside.

[0020] In some embodiments, the end plate is provided with a clamping groove, and the fixing belt is at least partially clamped in the clamping groove.

[0021] Based on the above-mentioned embodiments of the present application, the position of the fixing belt can be fixed by the clamping groove, avoiding loosening caused by sliding of the fixing belt, thereby affecting the fixing effect of the battery cell and the end plate.

[0022] In some embodiments, the battery module further comprises a module cover, the module cover is arranged on the side of the protective adhesive layer away from the integrated busbar, and the module cover is connected to the protective adhesive layer.

[0023] Based on the above-mentioned embodiments of the present application, the module cover is arranged, and the module cover is arranged at the end of the integrated busbar and the battery cell module, thereby enhancing the protection effect of the integrated busbar and the battery cell module as a whole. At this time, the protective adhesive layer can not only serve as a protective layer for the gasket and the like, but also serve as an adhesive layer between the module cover and the integrated busbar and the like.

[0024] According to the second aspect of the present application, a power consumption device is provided, which comprises a shell and the above-mentioned battery module. The battery accommodating cavity is arranged in the shell, and the battery module is arranged in the battery accommodating cavity.

[0025] Based on the above-mentioned embodiments of the present application, the power consumption device provided by the present application comprises the above-mentioned battery module, and therefore also has the above-mentioned beneficial effects. In order to avoid repetition, details are not repeated here.

[0026] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings are used to provide further understanding of the present application and constitute a part of the specification, and are used to explain the present application together with the following specific embodiments, but do not constitute a limitation on the present application. In the drawings:

[0028] Figure 1 is a structural schematic diagram of a battery module in the prior art.

[0029] Figure 2 is an exploded schematic diagram of a battery module in the prior art.

[0030] Figure 3 is a structural schematic diagram of an integrated busbar and a gasket in the battery module provided by the embodiments of the present application.

[0031] Figure 4is a structural schematic diagram of an integrated busbar in a battery module provided by an embodiment of the present application.

[0032] Figure 5 is a structural schematic diagram of an integrated busbar and a protective pad in a battery module provided by an embodiment of the present application.

[0033] Figure 6 is a structural schematic diagram of a cell and a protective pad in a battery module provided by an embodiment of the present application.

[0034] Figure 7 is a structural schematic diagram of an end plate in a battery module provided by an embodiment of the present application.

[0035] Legend of Reference Signs

[0036] 1, cell; 11, pole; 12, buffer separator; 2, gasket; 3, integrated busbar; 31, glue injection groove; 311, wire harness groove; 312, gasket groove; 32, base plate; 33, wire harness connector; 34, connection wire harness; 35, hot melt column; 36, wire harness buckle groove; 4, protective pad; 41, first avoiding hole; 42, second avoiding hole; 5, protective glue layer; 6, sealing ring; 7, end plate; 71, fixing belt; 72, clamping groove; 73, weight reduction groove; 74, end plate separator; 8, module cover. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present application clearer, the following further describes the present application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0038] In order to make the objectives, technical solutions and advantages of the present application clearer, the following further describes the present application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0040] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0041] In the description of the present application, it should be noted that, without being otherwise stated, the terms "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In order to avoid the problem of internal short circuit caused by the electrolyte sprayed from the explosion-proof valve when the power battery is out of control, in the prior art, the glue is usually injected directly at the top of the battery cell, that is, at the end where the upper pole of the battery cell is located, and the glue layer is formed by injecting glue to protect the structure such as the pole and the pad at the top of the battery cell.

[0044] However, when the above method is used, multiple battery cells are usually arranged in the same battery box to form a battery cell module, and a gap is usually arranged between each battery cell, so the injected glue will flow into the gap between the battery cells, and the flowing glue will solidify in the gap between the battery cells. When the battery module shakes, the battery cells will be pressed against each other, at which time the solidified glue will exert pressure on the battery cell shell, and in severe cases, it may even pierce the battery cell shell, causing the risk of liquid leakage.

[0045] In order to solve the above problems in the prior art, with reference to the Figures 1 to 6 According to the first aspect of the present application, the battery module provided by the embodiments of the present application includes at least an integrated busbar 3, a protective pad 4 and at least two battery cells 1. Any two adjacent battery cells 1 are connected and conducted through the pad 2. The integrated busbar 3 is at least partially arranged between the pad 2 and the battery cell 1, and the integrated busbar 3 is electrically connected with the pad 2. The protective pad 4 is arranged between the battery cell 1 and the integrated busbar 3, the pole 11 penetrates the protective pad 4 and is connected with the pad 2, and the protective pad 4 covers the joint position of any two adjacent battery cells 1. The integrated busbar 3 is provided with a glue injection groove 31, a protective glue layer 5 is arranged in the glue injection groove 31, and the pad 2 is located in the glue injection groove 31.

[0046] Based on the above embodiments of the present application, when the battery module is in use, the battery cells 1 are connected in sequence by the busbar 2 to form a battery cell 1 module, and then the integrated busbar 3 is connected to the busbar 2. On the one hand, the temperature and voltage data of the busbar 2 position and the adjacent battery cell 1 can be measured, and on the other hand, the current condition of the battery cell 1 module can be regulated. At the same time, by opening the glue injection groove 31 on the integrated busbar 3, the glue is injected into the glue injection groove 31 to form a protective glue layer 5, which can protect the position of the busbar 2. When the battery cell 1 is in thermal runaway, the electrolyte and other substances sprayed out will directly spray onto the protective glue layer 5 instead of directly contacting the busbar 2 and other structures, thereby reducing or even avoiding the possibility of the electrolyte connecting and conducting between the busbar 2 and the busbar 2 and between the busbar 2 and other structures, and further solving the problem that the electrolyte sprayed out when the battery cell 1 is in thermal runaway may cause short circuit between the busbar 2 and the busbar 2 and between the busbar 2 and other structures.

[0047] Further, by the arrangement of the protective pad 4, the protective pad 4 is arranged between the battery cell 1 and the integrated busbar 3, so as to protect the glue flowing from the integrated busbar 3 to the battery cell 1, and to cover and close the gap position between the two adjacent battery cells 1. At this time, even if part of the glue in the glue injection groove 31 flows to the battery cell 1, it cannot flow to the gap position between the two adjacent battery cells 1 due to the closing and protecting effect of the protective pad 4, thereby reducing or even avoiding the possibility of damage to the battery cell 1 shell caused by the glue flowing to the gap position of the battery cell 1 and solidifying. That is, by the cooperation of the protective pad 4 and the glue injection groove 31 on the integrated busbar 3, the battery module end structure such as the busbar 2 is protected by glue injection, and at the same time, the protective pad 4 is isolated and protected between the integrated busbar 3 and the battery cell 1, thereby solving the problem that in the prior art, when the battery module is protected by top glue injection, the glue easily flows into the gap between the battery cells 1, causing damage to the battery cell 1 shell.

[0048] Specifically, when the battery module is in use, taking a square power battery as an example, the top of the battery cell 1 is respectively provided with a positive pole and a negative pole, and the positive pole and the negative pole of the battery cell 1 are arranged alternately when a plurality of battery cells 1 are arranged in groups. At this time, the busbar 2 is connected to the poles 11 of the two adjacent battery cells 1, that is, the positive pole of one battery cell 1 and the negative pole of another battery cell 1 are connected, thereby realizing the series connection between the plurality of battery cells 1. In this process, the integrated busbar 3 is connected to the position of the busbar 2, thereby measuring and collecting the temperature and voltage data of the busbar 2 and the battery cell 1 position. At the same time, the protective pad 4 is arranged between the battery cell 1 and the integrated busbar 3, and the upper and lower surfaces of the protective pad 4 are respectively attached to the lower surface of the integrated busbar 3 and the upper surface of the battery cell 1, while covering and closing the gap position between any two adjacent battery cells 1.

[0049] When it is necessary to protect the structure such as the tab 2 on the upper surface of the battery cell 1, at this time, the glue is injected into the glue injection groove 31 formed on the integrated busbar 3, and the flowing glue naturally covers the structure such as the tab 2, and then the glue solidifies to form a protective glue layer 5, so as to cover the tab 2 in the protective glue layer 5 for protection. In this process, the glue injection groove 31 provided on the integrated busbar 3 plays a role similar to a mold for containing and solidifying the glue, and the protective glue layer 5 formed by solidification can form a relatively complete plate-shaped protection structure together with the integrated busbar 3.

[0050] Subsequently, when the battery cell 1 is in thermal runaway, at this time, the electrolyte is sprayed upward from the explosion-proof valve position of the battery cell 1, and at this time, the plate-shaped protection structure formed by the protective glue layer 5 and the integrated busbar 3 is located between the tab 2 and the explosion-proof valve, so as to block the electrolyte, and in addition, the protective glue layer 5 has a covering protection effect on the tab, so as to avoid direct contact between the electrolyte and the tab 2 and other structures, thereby avoiding the problem that the sprayed electrolyte causes short circuit between the tab 2 and the tab 2 and between the tab 2 and the shell of the battery cell 1.

[0051] Further, at this time, the integrated busbar 4 is arranged above the battery cell 1, and after the glue is injected into the glue injection groove 31, the glue is easy to flow downward to the position of the battery cell 1, so by arranging the protective pad 4 between the integrated busbar 3 and the battery cell 1, the flow path of the glue can be limited above the protective pad 4, thereby reducing or even avoiding the possibility that the glue flows to the gap position of the battery cell 1 and solidifies to damage the shell of the battery cell 1.

[0052] In addition, it also needs to be explained that the protective pad 4 is arranged between the integrated busbar 3 and the battery cell 1 in the present application, which can close the gap between any two adjacent battery cells 1. In order to ensure the closing effect, the protective pad 4 can be arranged as a flexible pad, which can slightly deform when being pressed, so as to improve the closing effect of the protective pad 4. At the same time, the protective pad 4 needs to be in direct contact with corrosive substances such as electrolyte during use, so the specific material of the protective pad 4 should also consider having certain corrosion resistance when being selected. When being selected, a variety of materials including silica gel, rubber and glass fiber can be selected, which have good corrosion resistance and flexibility, so as to achieve good protection and closing effect.

[0053] At the same time, the glue used to solidify the protective glue layer 5 in the present application can select any suitable type of glue. For example, a heat-conducting structural glue can be selected, which has good high-temperature resistance, heat conduction and insulation performance, so that the protective glue layer 5 formed after solidification can better cover and protect the structure such as the tab 2.

[0054] In the present application, the integrated busbar 3 can be arranged as any suitable structure. For example, the integrated busbar 3 can be arranged as a plate-shaped structure, and the glue injection groove 31 can be arranged on the plate-shaped structure. Figure 3 and Figure 4As shown in FIG. 1, in some embodiments of the present application, the integrated busbar 3 can include a substrate 32, the substrate 32 is recessed away from the surface of the battery cell 1 to form a glue injection groove 31, the glue injection groove 31 includes a wire harness groove 311 and a gasket groove 312, and the wire harness groove 311 communicates with the gasket groove 312. The gasket 2 is arranged in the gasket groove 312 and connected to the integrated busbar 3.

[0055] Based on the above-mentioned embodiments of the present application, the protective glue layer 5 formed after glue injection in the glue injection groove 31 can coat the structure such as the gasket 2 located in the glue injection groove 31, and can improve the protection effect of the gasket 2 structure.

[0056] Further, when the specific material of the protective glue layer 5 is set as a heat-conducting structural glue, at this time, the plurality of gaskets 2 are all wrapped in the protective glue layer 5 formed by solidification of the heat-conducting structural glue, so that the good heat-conducting performance of the heat-conducting structural glue can make the temperature between the gaskets 2 more uniform, and improve the overall temperature uniformity of the battery.

[0057] Specifically, in the present application, the substrate 32 of the integrated busbar 3 can be selected as any suitable material, and when specifically set, a material with certain insulation effect and certain high-temperature resistance performance should be selected, such as plastic, epoxy resin and other materials.

[0058] At the same time, in order to further fix the gasket 2, in some embodiments of the present application, a hot melt column 35 can be arranged on the bottom wall of the gasket groove 312, and a fixing hole is arranged correspondingly on the gasket 2, the hot melt column 35 passes through the fixing hole, and then the end of the hot melt column 35 is hot-melted to form a fixing block, so as to achieve the effect similar to riveting, and realize the fixation between the gasket 2 and the integrated busbar 3. In the specific production and processing process, when the substrate 32 is made of materials such as plastic and epoxy resin, the hot melt column 35 can be integrally processed and formed with the substrate 32 by injection molding or other methods.

[0059] Reference Figure 3 As shown in FIG. 1, in some embodiments of the present application, the integrated busbar 3 can include a substrate 32, the substrate 32 is recessed away from the surface of the battery cell 1 to form a glue injection groove 31, the glue injection groove 31 includes a wire harness groove 311 and a gasket groove 312, and the wire harness groove 311 communicates with the gasket groove 312. The gasket 2 is arranged in the gasket groove 312 and connected to the integrated busbar 3.

[0060] Based on the above embodiments of the application, the integrated busbar 3 needs to collect the temperature and voltage data of the BMS 2 and the battery cell 1 during use. The connection harness 34 is connected to the BMS 2 at one end, and the end of the connection harness 34 can also be provided with a voltage sampling terminal and a temperature sampling terminal, which are directly connected to the BMS 2, so as to collect the voltage and temperature data of the BMS 2 and the battery cell 1 structure. Then the other end of the connection harness 34 is connected to the harness plug-in piece 33, which is in communication with the outside of the battery module through the harness plug-in piece 33, and can be connected to the battery management system (Battery Management System, BMS) module, etc., to realize the analysis and processing of the data and the subsequent regulation and control of the battery module based on the analysis and processing results.

[0061] In summary, through the above settings, the integrated busbar 3 takes the substrate 32 as the main body, and is molded by the glue injection groove 31 formed on the substrate 32, and the connection harness 34 and the BMS 2 are covered and protected by the protective glue layer 5. At this time, through the covering of the BMS 2 and the connection harness 34, the protective glue layer 5 can be more conducive to heat conduction, thereby making the temperature between each BMS 2 more uniform.

[0062] Meanwhile, the end of the connection harness 34 needs to be directly or indirectly connected to the position of the BMS 2, and needs to be fixed between the BMS 2 through welding or other methods. During the use of the battery module, slight shaking of the battery module can cause movement of the battery cell 1, which in turn can cause the connection between the connection harness 34 and the BMS 2 to be disconnected due to shaking. By covering the connection harness 34 and its connection structure with the protective glue layer 5, the movement of the battery cell 1 can be reduced, thereby reducing the possibility of disconnection between the connection harness 34 and the BMS 2 due to movement of the battery cell 1.

[0063] Further, as shown in Figure 3 and Figure 4 In some other embodiments of the application, at least two harness buckle grooves 36 can be provided on the bottom surface of the harness groove 311, for example, two, three, four or more, and the connection harness 34 can be arranged in an S-shaped manner in the harness buckle groove 36, for example, from the first harness buckle groove 36 downward, and then from the second harness buckle groove 36 upward back into the harness groove 311. At this time, the harness buckle groove 36 can play a role similar to that of a strap, and can bundle and arrange the connection harness 34, so that the connection harness 34 can be arranged more clearly and simply.

[0064] In the present application, the specific structure of the protective pad 4 can be selected in any suitable manner.

[0065] Referring to Figure 5As shown in FIG. 1, in an example embodiment provided in the present application, the protective pad 4 can be provided with a first avoiding hole 41, the first avoiding hole 41 penetrating through the protective pad 4, and the pole 11 of the battery cell 1 at least partially penetrating through the first avoiding hole 41 into the buss bar groove 312 and being connected with the buss bar 2.

[0066] Based on the above-mentioned embodiments of the present application, the first avoiding hole 41 can facilitate the connection between the pole 11 and the buss bar 2, and further facilitate the connection and conduction between the adjacent battery cells 1 through the buss bar 2.

[0067] Specifically, in the present application, the buss bar 2 is arranged between the poles 11 of the adjacent two battery cells 1 for the series connection between the adjacent two battery cells 1, and meanwhile, the integrated busbar 3 and the protective pad 4 are both arranged between the battery cell 1 and the buss bar 2, so that the pole 11 needs to penetrate through the protective pad 4 and the integrated busbar 3 in sequence when being connected to the buss bar 2. Therefore, the first avoiding hole 41 can provide space for the pole 11 to penetrate. The size and position of the first avoiding hole 41 need to be set according to the size and position of the pole 11.

[0068] Further, in some embodiments of the present application, referring to Figure 6 As shown in FIG. 1, the pole 11 can be sleeved with a sealing ring 6, and the sealing ring 6 is at least partially located in the first avoiding hole 41 to seal the gap position between the pole 11 and the first avoiding hole 41.

[0069] Based on the above-mentioned embodiments of the present application, the size of the first avoiding hole 41 needs to be slightly larger than the actual size of the pole 11 when being set to facilitate assembly and adapt to various structures of the battery cell 1. By setting the sealing ring 6, the gap position between the first avoiding hole 41 and the pole 11 can be sealed to enhance the sealing effect, thereby reducing the possibility of glue flowing from the gap position between the first avoiding hole 41 and the pole 11 to the battery cell 1 when injecting glue into the glue injection groove 31.

[0070] Specifically, before setting the sealing ring 6, the protective pad 4 is laid first, the pole 11 is penetrated into the first avoiding hole 41, and then glue is applied on the surface of the sealing ring 6 to sleeve the sealing ring 6 on the pole 11 to seal the gap position between the pole 11 and the first avoiding hole 41. Then, the gap position between the sealing ring 6 and the protective pad 4 is filled with glue to realize the overall sealing between the first avoiding hole 41 and the pole 11.

[0071] Further, in actual use, the sealing ring 6 can be selected from any suitable material, and the material should have certain elasticity and corrosion resistance, for example, silicone, rubber, resin and the like. By using the elasticity of the above-mentioned material, on the one hand, the sealing ring 6 can be easily fitted on the pole 11, and on the other hand, the sealing ring 6 can be deformed to a certain extent after being pressed, thereby better improving the sealing effect. And by using the good corrosion resistance of the above-mentioned material, the sealing ring 6 can cope with the corrosion effect of the electrolyte.

[0072] At the same time, when the sealing ring 6 is set, the inner diameter of the sealing ring 6 should be slightly smaller than the outer diameter of the pole 11. Since the sealing ring 6 is set to be an elastic material, the sealing ring 6 cannot be fitted on the pole 11 when the inner diameter of the sealing ring 6 is slightly smaller than the outer diameter of the pole 11. However, after the sealing ring 6 is fitted on the pole 11, the sealing ring 6 can be better tightly gripped on the pole 11, thereby improving the sealing effect between the pole 11 and the sealing ring 6.

[0073] Reference Figure 5 As shown in the above-mentioned embodiments of the present application, in some embodiments of the present application, the protective pad 4 can also be provided with a second avoiding hole 42, the second avoiding hole 42 is a blind hole, and the second avoiding hole 42 is arranged on the wall surface of the protective pad 4 facing the battery cell 1, and the second avoiding hole 42 is opposite to the explosion-proof valve of the battery cell 1.

[0074] Based on the above-mentioned embodiments of the present application, by arranging the second avoiding hole 42, and the second avoiding hole 42 is a blind hole structure, and the second avoiding hole 42 and the protective pad 4 and the upper surface of the battery cell 1 form a cavity structure, thereby not only forming a pressure relief space for the explosion-proof valve to relieve pressure, but also stabilizing the pressure relief when the battery is in thermal runaway, and avoiding the risk of short circuit of the gasket 2 and other structures caused by the direct spraying of the electrolyte to the position of the integrated busbar 3 and the gasket 2 when the explosion-proof valve bursts.

[0075] Specifically, in use of the protective pad 4, the upper surface of the protective pad 4 is tightly attached to the bottom surface of the integrated busbar 3, and the lower surface of the protective pad 4 is tightly attached to the upper surface of the battery cell 1, thereby forming a cavity structure at the position of the blind hole. When the battery cell 1 is in thermal runaway, the explosion-proof valve bursts and relieves the pressure inside the battery cell 1, and the electrolyte and high-temperature smoke sprayed by the explosion-proof valve will first be concentrated in the cavity structure formed by the blind hole. Then, when the pressure in the cavity structure formed by the blind hole position further increases, the high-temperature smoke can break through the protective pad 4 from the blind hole position, and the electrolyte will contact the bottom wall of the integrated busbar 3 or the outer wall of the protective layer 5, but cannot directly contact the gasket 2 and other structures, thereby avoiding the problem of short circuit caused by the direct contact of the electrolyte with the gasket 2 and other structures.

[0076] Reference Figure 7As shown in the above embodiments of the present application, the battery module can further include an end plate 7 arranged at the end of the battery cell 1, and the end plate 7 is provided with a fixing belt 71 which is entirely sleeved outside the end plate 7 and the battery cell 1.

[0077] Based on the above embodiments of the present application, the battery cell 1 is clamped and fixed by the end plate 7, the battery cell 1 module is fixed as a whole by clamping it from both sides, and then the end plate 7 and the battery cell 1 are tightly fixed from the outside by the fixing belt 71.

[0078] Further, in order to reduce the weight of the end, thereby reducing the weight of the battery module as a whole, in some embodiments of the present application, the end plate 7 can further be provided with a weight reduction groove 73, and the weight reduction groove 73 can be provided with a plurality of weight reduction grooves 73 which are evenly distributed on the end plate 7, so that the strength of the end plate 7 as a whole is more uniform, thereby reducing the weight while avoiding the local weakness of the end plate 7 affecting the service life.

[0079] At the same time, the end plate 7 and the battery cell 1 can be further provided with an end plate partition plate 74, which can play the role of insulation and buffering on the one hand, avoiding the end plate 7 from piercing the insulating protective film on the battery cell 1, and further avoiding the end plate 7 from causing damage to the edge battery cell 1 during the setting and use process. On the other hand, the end plate partition plate 74 can also play the role of heat insulation, thereby reducing the influence of the setting of the end plate 7 on the temperature of the end battery cell 1, and improving the temperature consistency between the battery cells 1.

[0080] In some embodiments, the end plate 7 can further be provided with a clamping groove 72, and the fixing belt 71 is at least partially clamped in the clamping groove 72.

[0081] Based on the above embodiments of the present application, by setting the clamping groove 72, the position of the fixing belt 71 can be fixed, avoiding the loosening caused by the sliding of the fixing belt 71, and further affecting the fixing effect of the battery cell 1 and the end plate 7.

[0082] Specifically, when the clamping groove 72 is set, it can be arranged only at the vertical edge position of the end plate 7, or it can be arranged horizontally along the entire outer surface of the end plate 7, which can be selected according to the connection requirements, and the present application does not make specific limitations.

[0083] In some embodiments of the present application, the battery module can further include a module cover 8 arranged on the side of the protective adhesive layer 5 away from the integrated busbar 3, and the module cover 8 is connected to the protective adhesive layer 5.

[0084] Based on the above embodiments of the present application, by arranging the module cover 8, the module cover 8 is arranged on the integrated busbar 3 and the end of the battery cell module, thereby enhancing the protection effect of the integrated busbar 3 and the battery cell module. At this time, the protective adhesive layer 5 can not only serve as a protective layer for the gasket 2 and other structures, but also serve as an adhesive layer between the module cover 8 and the integrated busbar 3 and other structures.

[0085] Further, in some embodiments of the present application, the edge position of the module cover 8 can also be provided with a flange structure, and the flange structure and the module cover 8 form a U-shaped cover structure, and then the U-shaped cover structure is arranged on the upper part of the battery cell 1 and other structures to protect the battery cell 1 and other structures.

[0086] In addition, it should be noted that the battery module in the present application is not limited to the above structure, for example, it can also include a heat dissipation cooling module and other structures, which can be arranged as a liquid cooling plate. The liquid cooling plate can directly contact the battery cell 1 at the bottom of the battery cell 1 and other positions to dissipate heat. Alternatively, as shown in Figure 6 In addition, it should be noted that the battery module in the present application is not limited to the above structure, for example, it can also include a heat dissipation cooling module and other structures, which can be arranged as a liquid cooling plate. The liquid cooling plate can directly contact the battery cell 1 at the bottom of the battery cell 1 and other positions to dissipate heat. Alternatively, as shown in

[0087] According to a second aspect of the present application, a power consuming device is provided, which includes a housing and the above-mentioned battery module. The battery module is arranged in a battery accommodating cavity in the housing.

[0088] Specifically, the power consuming device in the present application can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, and the like. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, and the like. The spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0089] Based on the above embodiments of the present application, the power consuming device provided by the present application includes the above-mentioned battery module, and therefore has the above-mentioned beneficial effects. To avoid repetition, details are not repeated here.

[0090] The preferred embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, various simple modifications can be made to the technical solution of the present application, and these simple modifications all belong to the protection scope of the present application.

[0091] It should be further noted that the various technical features described in the above specific embodiments can be combined in any suitable manner, and the application is not limited to the combinations explicitly described. In order to avoid unnecessary repetition, the various possible combinations are not described separately in the application.

[0092] Furthermore, the various different embodiments of the application can also be combined with each other in any suitable manner, as long as it does not deviate from the idea of the application, it should also be considered as disclosed in the application.

Claims

1. A battery module, characterized by, The battery module comprises: at least two battery cells, any two adjacent battery cells being connected in conduction by a busbar; an integrated busbar, at least partially disposed between the busbar and the battery cells, and the integrated busbar being electrically connected with the busbar; a protective pad, disposed between the battery cells and the integrated busbar, and the protective pad covering the joint position of any two adjacent battery cells; wherein the integrated busbar is provided with a glue injection groove, and the glue injection groove is provided with a protective glue layer, and the busbar is located in the glue injection groove.

2. The battery module of claim 1, wherein, The integrated busbar comprises a substrate, and the surface of the substrate away from the battery cells is recessed to form the glue injection groove, and the glue injection groove comprises a wire harness groove and a busbar groove, and the wire harness groove is in communication with the busbar groove; the busbar is disposed in the busbar groove and connected to the integrated busbar.

3. The battery module of claim 2, wherein, The integrated busbar further comprises a wire harness connector and a connecting wire harness, the connecting wire harness is disposed in the wire harness groove, and one end of the connecting wire harness is connected to the busbar, and the other end of the connecting wire harness is connected to the wire harness connector, and the wire harness connector is used to connect with the outside of the battery module.

4. The battery module of claim 2, wherein, The protective pad is provided with a first avoiding hole, the first avoiding hole penetrates through the protective pad, the pole of the battery cell at least partially penetrates through the first avoiding hole into the busbar groove, and is connected with the busbar.

5. The battery module of claim 4, wherein, A sealing ring is sleeved on the pole, and the sealing ring is at least partially located in the first avoiding hole to close the gap position between the pole and the first avoiding hole.

6. The battery module of claim 2, wherein, The protective pad is provided with a second avoiding hole, the second avoiding hole is provided as a blind hole, and the second avoiding hole is provided on the wall surface of the protective pad facing the battery cell, and the second avoiding hole is opposite to the explosion-proof valve of the battery cell.

7. The battery module of claim 1, wherein, The battery module further comprises an end plate, the end plate is disposed at the end of the battery cell, and the end plate is provided with a fixing belt, and the fixing belt is sleeved on the outside of the end plate and the battery cell.

8. The battery module of claim 7, wherein, The end plate is provided with a clamping groove, and the fixing belt is at least partially clamped in the clamping groove.

9. The battery module of claim 1, wherein, The battery module further comprises a module cover, the module cover is disposed on the side of the protective glue layer away from the integrated busbar, and the module cover is connected to the protective glue layer.

10. An electric device, characterized by The battery module comprises: a housing, the housing being provided with a battery accommodating cavity; and The battery module according to any one of claims 1-9 is disposed in the battery accommodating cavity. The battery module comprises: at least two battery cells, any two adjacent battery cells being connected in conduction by a busbar; an integrated busbar, at least partially disposed between the busbar and the battery cells, and the integrated busbar being electrically connected with the busbar; a protective pad, disposed between the battery cells and the integrated busbar, and the protective pad covering the joint position of any two adjacent battery cells; wherein the integrated busbar is provided with a glue injection groove, and the glue injection groove is provided with a protective glue layer, and the busbar is located in the glue injection groove. The integrated busbar comprises a substrate, and the surface of the substrate away from the battery cells is recessed to form the glue injection groove, and the glue injection groove comprises a wire harness groove and a busbar groove, and the wire harness groove is in communication with the busbar groove; the busbar is disposed in the busbar groove and connected to the integrated busbar. The integrated busbar further comprises a wire harness connector and a connecting wire harness, the connecting wire harness is disposed in the wire harness groove, and one end of the connecting wire harness is connected to the busbar, and the other end of the connecting wire harness is connected to the wire harness connector, and the wire harness connector is used to connect with the outside of the battery module. The protective pad is provided with a first avoiding hole, the first avoiding hole penetrates through the protective pad, the pole of the battery cell at least partially penetrates through the first avoiding hole into the busbar groove, and is connected with the busbar. A sealing ring is sleeved on the pole, and the sealing ring is at least partially located in the first avoiding hole to close the gap position between the pole and the first avoiding hole. The protective pad is provided with a second avoiding hole, the second avoiding hole is provided as a blind hole, and the second avoiding hole is provided on the wall surface of the protective pad facing the battery cell, and the second avoiding hole is opposite to the explosion-proof valve of the battery cell. The battery module further comprises an end plate, the end plate is disposed at the end of the battery cell, and the end plate is provided with a fixing belt, and the fixing belt is sleeved on the outside of the end plate and the battery cell. The end plate is provided with a clamping groove, and the fixing belt is at least partially clamped in the clamping groove. The battery module further comprises a module cover, the module cover is disposed on the side of the protective glue layer away from the integrated busbar, and the module cover is connected to the protective glue layer. The battery module comprises: a housing, the housing being provided with a battery accommodating cavity; and The battery module according to any one of claims 1-9 is disposed in the battery accommodating cavity.

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