Battery module

Abstract

The utility model relates to the technical field of battery manufacturing, in particular to a battery module, and aims to solve the problem that the insulating property of the battery module is influenced due to the fact that a blue film is easy to damage in the assembly or transportation process of the conventional battery module. In order to achieve the purpose, according to the battery module, the first insulating plate is arranged on the side, away from the battery cell assembly, of the CCS assembly, the second insulating plates are arranged on the two sides, in the second direction, of the battery cell assembly, and the third insulating plates are arranged on the two sides, in the third direction, of the battery cell assembly, so that the insulating performance of the battery module can be improved; therefore, the problem that the insulating property of the battery module is influenced due to the damage of the battery module in the assembly or transportation process caused by only depending on the blue film can be avoided, so that the safety, durability and reliability of the battery module are improved.

Description

Technical Field

[0001] The utility model relates to the field of battery manufacturing, and particularly provides a battery module. Background Art

[0002] A battery module is formed by connecting multiple battery cells in series or parallel. The installation process of the battery module is to first arrange the battery cells into a group to form a battery cell assembly, and then fixedly install two end plates at both ends of the battery cell assembly; then, apply pressure to both ends of the battery cell assembly, and use a fixing band to make the battery cells close together to form a battery module.

[0003] However, only a layer of blue film is covered on the outer layer of the battery cell for protection. The blue film is easily damaged during the assembly or transportation of the battery module, affecting the insulation performance of the battery module and thus causing potential safety hazards.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Utility Model

[0005] The utility model aims to solve the above technical problems, that is, to solve the problem that the blue film of the existing battery module is easily damaged during assembly or transportation, thereby affecting the insulation performance of the battery module. To this end, the present application provides a battery module, which includes:

[0006] A battery cell assembly;

[0007] A CCS assembly, which is arranged on one side of the battery cell assembly along the first direction;

[0008] A first insulating plate, which is arranged on the side of the CCS assembly away from the battery cell assembly;

[0009] A second insulating plate, which is arranged on both sides of the battery cell assembly along the second direction;

[0010] A third insulating plate, which is arranged on both sides of the battery cell assembly along the third direction;

[0011] Wherein, the first direction, the second direction and the third direction are perpendicular to each other.

[0012] In the preferred technical solution of the above battery module, the battery module further includes:

[0013] An end plate, which is arranged on both sides of the battery cell assembly along the second direction, and the second insulating plate is arranged between it and the battery cell assembly.

[0014] In the preferred technical solution of the above battery module, the battery module further includes:

[0015] A protective cover is provided on the end plate, and an accommodation space capable of accommodating the output pole of the CCS component is formed on the end plate.

[0016] In a preferred technical solution of the above battery module, the protective cover is detachably provided on the end plate.

[0017] In a preferred technical solution of the above battery module, the end plate is provided with a clamping protrusion, and the protective cover is provided with a clamping groove or a clamping hole that is clamped and matched with the clamping protrusion; or

[0018] The protective cover is provided with a clamping protrusion, and the end plate is provided with a clamping groove or a clamping hole that is clamped and matched with the clamping protrusion.

[0019] In a preferred technical solution of the above battery module, the battery module further includes:

[0020] A fixing strap is sleeved on the end plate and the third insulating plate.

[0021] In a preferred technical solution of the above battery module, the end plate is provided with an installation groove capable of clamping the fixing strap therein; and / or

[0022] The fixing strap is made of a non-metallic material.

[0023] In a preferred technical solution of the above battery module, the end plate is made of a non-metallic material; and / or

[0024] The end plate is provided with a lifting hole; and / or

[0025] The end plate is provided with heat dissipation holes.

[0026] In a preferred technical solution of the above battery module, a limiting plate extending toward the side close to the battery cell assembly is provided on the outer edge of the third insulating plate away from the first insulating plate, and the limiting plate abuts against the side of the battery cell assembly away from the first insulating plate; and / or

[0027] The first insulating plate and the CCS component are connected by fasteners; and / or

[0028] Structural adhesive is provided on the side of the battery cell assembly away from the first insulating plate.

[0029] In a preferred technical solution of the above battery module, the fasteners are made of a non-metallic material.

[0030] Those skilled in the art can understand that the battery module of the present utility model can improve the insulation performance of the battery module by arranging a first insulating plate on the side of the CCS component away from the battery cell component, arranging second insulating plates on both sides of the battery cell component along the second direction, and arranging third insulating plates on both sides of the battery cell component along the third direction, thereby avoiding the problem that the insulation performance of the battery module may be affected due to possible damage to the battery module during assembly or transportation only relying on the blue film, and thus improving the safety, durability and reliability of the battery module.

[0031] Furthermore, by forming a receiving space for the output pole of the battery cell component through the protective cover and the end plate, the output pole of the battery cell component can be protected, thereby avoiding the risk of electric shock during the assembly or maintenance of the battery module.

[0032] Furthermore, by detachably arranging the protective cover on the end plate, it is convenient for the installation and disassembly of the battery module.

[0033] Furthermore, by sleeving fixing straps on the end plate and the third insulating plate, the connection strength of the battery module can be improved.

[0034] Furthermore, by arranging an installation groove on the end plate, the fixing plate can be clamped therein, thereby avoiding the fixing strap from coming off and improving the connection firmness of the battery module. In addition, by setting the fixing strap to be made of a non-metallic material, the insulation performance of the battery module can be further improved.

[0035] Furthermore, by arranging a limiting plate on the third insulating plate that can abut against the side of the battery cell component away from the first insulating plate, on the one hand, the insulation performance of the battery module can be further improved, and on the other hand, the connection strength of the battery module can also be improved.

[0036] Furthermore, the first insulating plate and the CCS component are connected by fasteners made of non-metallic materials, which can not only improve the connection strength of the battery module, but also improve the insulation performance of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The following describes the preferred embodiments of the present utility model with reference to the accompanying drawings, in which:

[0038] Figure 1 is the structure of the battery module of the present application Figure 1 ;

[0039] Figure 2 is the structure of the battery module of the present application Figure 2 ;

[0040] Figure 3 is the exploded view of the battery module of the present application;

[0041] Figure 4It is the structure of the end plate in this application Figure 1 ;

[0042] Figure 5 It is the structure of the end plate in this application Figure 2 ;

[0043] Figure 6 It is the installation schematic diagram of the first insulating plate and the CCS component in this application

[0044] List of reference numerals:

[0045] 1. Battery cell assembly; 11. Battery cell; 111. Structural adhesive; 2. First insulating plate; 21. Second pressure relief hole; 22. Baffle; 23. First positioning hole; 3. Second insulating plate; 4. Third insulating plate; 5. End plate; 51. Clamping protrusion; 52. Lifting hole; 53. Connecting hole; 54. First mounting hole; 55. Heat dissipation hole; 56. Mounting groove; 6. CCS component; 61. Second positioning hole; 62. Output pole; 7. Protective cover; 71. Clamping hole; 8. Fixing band; 9. Staple; 10. Limiting plate Detailed implementation manners

[0046] The preferred implementation manners of this application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of this application and are not intended to limit the protection scope of this application

[0047] It should be noted that in the description of this application, the terms indicating the direction or positional relationship such as "upper", "lower", "inner", "bottom", etc. are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to this application

[0048] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "set" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific situations

[0049] See Figure 1-6 , the battery module of this application will be described

[0050] As Figure 1-3As shown, to solve the problem that the existing battery module is prone to breakage during assembly or transportation due to relying only on the blue film, which in turn affects the insulation performance of the battery module, the battery module of the present application includes a battery cell assembly 1, a CCS assembly 6, a first insulating plate 2, a second insulating plate 3, and a third insulating plate 4. Among them, the CCS assembly 6 is disposed on one side of the battery cell assembly 1 along the first direction, the first insulating plate 2 is disposed on the side of the CCS assembly 6 away from the battery cell assembly 1, the second insulating plates 3 are disposed on both sides of the battery cell assembly 1 along the second direction, and the third insulating plates 4 are disposed on both sides of the battery cell assembly 1 along the third direction. Herein, the first direction, the second direction, and the third direction are perpendicular to each other.

[0051] By disposing the first insulating plate 2 on the side of the CCS assembly 6 away from the battery cell assembly 1, the second insulating plates 3 on both sides of the battery cell assembly 1 along the second direction, and the third insulating plates 4 on both sides of the battery cell assembly 1 along the third direction, the present application can improve the insulation performance of the battery module, avoid the problem that the insulation performance of the battery module may be affected due to breakage during assembly or transportation caused by relying only on the blue film, thereby enhancing the safety, durability, and reliability of the battery module.

[0052] Herein, unless there is a clear and opposite statement, the "first direction" refers to the positive and negative directions indicated by the arrow in the Z direction as shown in Figure 1-6 shown, the "second direction" refers to the positive and negative directions indicated by the arrow in the X direction as shown in Figure 1-6 shown, and the "third direction" refers to the positive and negative directions indicated by the arrow in the Y direction as shown in Figure 1-6 shown.

[0053] Next, a preferred embodiment of the battery module of the present application will be further described with reference to Figure 1-6 Those skilled in the art can understand that the following-described embodiments are only used to illustrate the principle of the present application and are not intended to limit the protection scope of the present application. On the premise that the battery module includes at least the battery cell assembly 1, the CCS assembly 6, the first insulating plate 2, the second insulating plate 3, and the third insulating plate 4, those skilled in the art can adjust the following setting methods so that the present application can be applied to more specific application scenarios.

[0054] See Figure 1-3, the battery module includes a battery cell assembly 1, a CCS assembly 6, a first insulating plate 2, a second insulating plate 3, a third insulating plate 4, end plates 5, a protective cover 7, and a fixing strap 8. Among them, the battery cell assembly 1 includes a plurality of battery cells 11, and the plurality of battery cells 11 are stacked in the second direction, which makes the space utilization of the battery cell assembly 1 more reasonable. The number of battery cells 11 that can be arranged per unit volume is more, and the energy density of the battery module can be effectively improved. A foam (not shown in the figure) is provided between adjacent battery cells 11, which can prevent short circuits between the battery cells 11, thereby improving the safety performance of the battery module.

[0055] Of course, the number of the battery cell assemblies 1 provided in this application is not fixed, and those skilled in the art can adjust it according to needs. For example, the number of the battery cell assemblies 1 can be 2, 3, or other numbers.

[0056] It should be noted that there is no limitation on the connection method of the plurality of battery cells 11 in this application, as long as they can be assembled into a battery pack. For example, the plurality of battery cells 11 can be connected in parallel, in series, or in series-parallel.

[0057] Then refer to Figure 1-3 As shown in FIGS. 5 and 6, a first insulating plate 2 and a CCS assembly 6 are provided on one side of the battery cell assembly 1 along the first direction, a structural adhesive 111 is provided on the other side along the first direction, second insulating plates 3 and end plates 5 are provided on both sides along the second direction, and third insulating plates 4 are provided on both sides along the third direction. The second insulating plate 3 and the third insulating plate 4 are both adhered to the battery cell assembly 1. The end plate 5 is provided on the side of the second insulating plate 3 away from the battery cell assembly 1, so as to avoid short circuits between the end plate 5 and the battery cell assembly 1. The CCS assembly 6 is provided between the battery cell assembly 1 and the first insulating plate 2, and a first positioning hole 23 is provided on the first insulating plate 2, and a second positioning hole 61 is provided on the CCS assembly 6. A staple 9 can pass through the first positioning hole 23 and be snap-connected with the second positioning hole 61, so as to realize the assembly of the first insulating plate 2 and the CCS assembly 6. A pressure relief valve is provided on each battery cell 11, a plurality of first pressure relief holes corresponding to the pressure relief valves one by one are provided on the CCS assembly 6, and second pressure relief holes 21 corresponding to the first pressure relief holes one by one are provided on the first insulating plate 2, so that the gas discharged by the battery cells 11 when the air pressure is too high can be discharged out of the battery module through the first pressure relief holes and the second pressure relief holes 21.

[0058] Of course, the way of arranging the second insulating plate 3 and the third insulating plate 4 on the battery cell assembly 1 in this application is not fixed, and those skilled in the art can adjust it according to the setting needs. For example, the second insulating plate 3 and / or the second insulating plate 3 can also be provided on the battery cell assembly 1 through fasteners. The fasteners can be screws made of non-metallic materials, etc.

[0059] It should be noted that there is no restriction on the material of the fastener in this application, as long as the fastener can install the first insulating plate 2 and the CCS component 6 together. For example, the staple 9 can be made of a non-metallic material, so that while improving the connection strength between the first insulating plate 2 and the CCS component 6, the insulation performance of the battery module can also be improved. In addition, the setting form of the fastener in this application is not fixed, and those skilled in the art can adjust it according to needs. For example, the fastener can be a screw, and the screw passes through the first positioning hole 23 and is connected to the second positioning hole 61, which is also beneficial for assembling the first insulating plate 2 and the CCS component 6 together.

[0060] Next, referring to Figure 1-6 , the CCS component 6 includes a circuit board and two output poles 62 arranged thereon. These two output poles 62 are the positive output pole 62 and the negative output pole 62 respectively. The two output poles 62 are respectively arranged on both sides of the circuit board along the second direction. Both output poles 62 include a first part and a second part connected to the first part. The first part is arranged on the CCS component 6 and extends towards the direction of the second insulating plate 3, and the second part extends along the first part away from the first insulating plate 2 and abuts against one side of the end plate 5 far from the battery cell assembly 1. The protective cover 7 is L-shaped and includes a first cover plate and a second cover plate connected to the first cover plate. Among them, connection pieces are arranged on both sides of the second cover plate along the third direction, and clamping holes 71 are arranged on the connection pieces. Clamping protrusions 51 that are clamped with the clamping holes 71 are arranged on the end plate 5. When the protective cover 7 is installed on the end plate 5 through the clamping holes 71, the first cover plate is located on the side of the first part far from the structural adhesive 111, and the second cover plate is located on the side of the second part far from the battery cell assembly 1, so that the output pole 62 is arranged in the accommodating space formed by the protective cover 7 and the end plate 5, which is beneficial for protecting the output pole 62 of the battery cell assembly 1, thereby avoiding the risk of electric shock during the assembly or maintenance of the battery module.

[0061] Of course, the connection method between the protective cover 7 and the end plate 5 in this application is not fixed, and those skilled in the art can adjust it according to specific application scenarios. For example, a clamping groove or clamping hole 71 can be arranged on the protective cover 7, and a clamping protrusion 51 that is clamped with the clamping groove or clamping hole 71 is arranged on the connection piece. Or, a clamping groove can also be arranged on the connection piece, and it is clamped with the clamping protrusion 51 on the end plate 5 through the clamping groove. Or, connection holes 53 can be arranged on both the connection piece and the end plate 5, and the protective cover 7 and the end plate 5 are connected by fastening screws.

[0062] In addition, the setting form of the protective cover 7 in this application is not fixed, and those skilled in the art can adjust it according to needs. For example, the connecting pieces can be arranged on both sides of the first cover plate along the third direction. It should be noted that in other preferred embodiments, the arrangement of the connecting pieces is not necessary, and those skilled in the art can adjust it according to needs. In the case where the connecting pieces are not provided, the clamping holes 71 can be directly arranged on the second cover plate.

[0063] Next, refer to Figure 1-3 , the second insulating plate 3 being in a frame structure is conducive to the heat dissipation of the battery cell assembly 1. It includes a covering area and an uncovered area surrounding the covering area. The projection of the covering area in the second direction completely covers the projections of the battery cell assembly 1 and the CCS assembly 6 in the second direction, and the projection of the uncovered area in the second direction does not cover the projections of the battery cell assembly 1 and the CCS assembly 6 in the second direction, such that the third insulating plate 4 and the first insulating plate 2 located at both ends in the second direction can abut against the uncovered area, thereby improving the insulation performance of the battery cell 11 module. A limiting plate 10 extending towards the side close to the battery cell assembly 1 is arranged on the outer edge of the third insulating plate 4 away from the first insulating plate 2. The limiting plate 10 is integrally formed with the third insulating plate 4, and the limiting plate 10 abuts against the structural adhesive 111. Baffles 22 are arranged on both outer edges of the first insulating plate 2 along the third direction. The baffles 22 extend along the first insulating plate 2 towards the direction where the structural adhesive 111 is located, and can abut against one side of the third insulating plate 4 along the first direction, thereby preventing the CCS assembly 6 from affecting the insulation performance of the battery module due to not being blocked by the insulating plate.

[0064] Of course, the setting form of the second insulating plate 3 in this application is not fixed, and those skilled in the art can adjust it according to the setting needs. For example, a plurality of heat dissipation holes 55 can also be arranged on the second insulating plate 3, which can also facilitate the heat dissipation of the battery cell assembly 1. And / or, the second insulating plate 3 does not include an uncovered area, only includes a covering area, as long as it can cover the battery cell assembly 1 and the CCS assembly 6 in the second direction to ensure the insulation performance of the battery module. Or, the third insulating plate 4 can also include a covering area and an uncovered area. The projection of the covering area in the third direction completely covers the projections of the battery cell assembly 1 and the CCS assembly 6 in the third direction, and the projection of the uncovered area in the third direction does not cover the projections of the battery cell assembly 1 and the CCS assembly 6 in the third direction, such that the second insulating plate 3 and the first insulating plate 2 located at both ends in the second direction can abut against the uncovered area, thereby improving the insulation performance of the battery cell 11 module.

[0065] It should also be noted that in other preferred embodiments, the arrangement of the baffles 22 is not necessary, and those skilled in the art can choose according to needs. In the case where the baffles 22 are not provided, the third insulating plate 4 can extend towards the direction where the first insulating plate 2 is located, thereby being able to block the CCS assembly 6 and ensuring the insulation effect of the battery module.

[0066] Next, referring to Figure 4-5 , hoisting holes 52, heat dissipation holes 55, first mounting holes 54 and connection holes 53 are provided on the end plate 5. Among them, by providing the hoisting holes 52 on the end plate 5, it is convenient to move or transport the battery module. The heat dissipation holes 55 correspond to the frame-shaped holes on the second insulating plate 3, which is conducive to the heat dissipation of the battery cell 11 module. The CCS assembly 6 further includes a plurality of bus bars (not shown in the figure) provided on the circuit board. The bus bars located on both sides of the circuit board along the second direction can be inserted into the connection holes 53 on the corresponding end plate 5. Second mounting holes are provided on both sides of the circuit board along the second direction, and first mounting holes 54 are provided on the end plate 5. Screws pass through the second mounting holes and are connected to the first mounting holes 54, so that the end plate 5 and the CCS assembly 6 are mounted together.

[0067] It should be noted that there is no restriction on the material of the end plate 5 in this application, as long as the end plate 5 can protect and fix the battery cell assembly 1. For example, the material of the end plate 5 can be a non-metallic material. By setting the material of the end plate 5 as a non-metallic material, the insulation performance of the battery module can be further improved.

[0068] In addition, there is no restriction on the number of hoisting holes 52, heat dissipation holes 55, first mounting holes 54 and connection holes 53 in this application, as long as the hoisting holes 52 are conducive to the transportation of the battery module, the heat dissipation holes 55 are conducive to the heat dissipation of the battery module, the first mounting holes 54 are conducive to the installation with the CCS assembly 6, and the connection holes 53 are conducive to the insertion of the bus bars. For example, the number of hoisting holes 52 can be 1, 2 or other numbers. And / or, the number of heat dissipation holes 55 can be 1, 2 or other numbers. And / or, the number of first mounting holes 54 can be 1, 2, 3 or other numbers. And / or, 1, 2 or other numbers.

[0069] Next, referring to Figure 1-3 , the number of fixing straps 8 is two. These two fixing straps 8 are arranged at intervals in the first direction, and each fixing strap 8 is sleeved on the end plate 5 and the third insulating plate 4. Two mounting grooves 56 are provided on each end plate 5. The two mounting grooves 56 are arranged at intervals in the first direction, so that each fixing strap 8 can be snapped into the corresponding mounting groove 56, thereby avoiding the fixing strap 8 from falling off and improving the connection strength of the battery module.

[0070] It should be noted that there is no restriction on the material of the fixing strap 8 in this application, as long as the fixing strap 8 can tightly fix the battery cell assembly 1, the end plate 5 and the third insulating plate 4. For example, the fixing strap 8 can be a non-metallic material, which can further improve the insulation performance of the battery module.

[0071] Of course, the number of the fixing belts 8 provided in this application is not fixed, and those skilled in the art can adjust it according to needs. For example, the number of the fixing belts 8 can be 1, 3 or other numbers. When the number of the fixing belts 8 is 1, the fixing belt 8 can be sleeved on the middle position of the end plate 5 and the third insulating plate 4 in the first direction, and at this time, the number of the mounting grooves 56 on the end plate 5 can also be 1. When the number of the fixing belts 8 is 3 or more, the fixing belts 8 can be arranged at intervals in the first direction, and at this time, the end plate 5 can be provided with the same number of mounting grooves 56 as the fixing belts 8.

[0072] Those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments is meant to be within the scope of this application and forms different embodiments. For example, in the claims of this application, any one of the claimed embodiments can be used in any combination.

[0073] So far, the technical solutions of this application have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of this application is obviously not limited to these specific embodiments. Without departing from the principle of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of this application.

Claims

1. A battery module, characterized in that, The battery module includes: a battery cell assembly; a CCS assembly, which is arranged on one side of the battery cell assembly along a first direction; a first insulating plate, which is arranged on the side of the CCS assembly away from the battery cell assembly; a second insulating plate, which is arranged on both sides of the battery cell assembly along a second direction; a third insulating plate, which is arranged on both sides of the battery cell assembly along a third direction; wherein, the first direction, the second direction and the third direction are perpendicular to each other.

2. The battery module according to claim 1, characterized in that The battery module further includes: end plates, which are arranged on both sides of the battery cell assembly along the second direction, and the second insulating plate is arranged between the end plates and the battery cell assembly.

3. The battery module according to claim 2, wherein The battery module further includes: a protective cover, which is arranged on the end plates and forms a receiving space on the end plates capable of receiving the output poles of the CCS assembly.

4. The battery module according to claim 3, characterized in that, The protective cover is detachably arranged on the end plates.

5. The battery module according to claim 4, characterized in that, The end plates are provided with clamping protrusions, and the protective cover is provided with a clamping groove or a clamping hole that is in clamping cooperation with the clamping protrusions; or The protective cover is provided with clamping protrusions, and the end plates are provided with a clamping groove or a clamping hole that is in clamping cooperation with the clamping protrusions.

6. The battery module according to claim 2, characterized in that, The battery module further includes: a fixing strap, which is sleeved on the end plates and the third insulating plate.

7. The battery module according to claim 6, wherein, The end plates are provided with mounting grooves capable of clamping the fixing strap therein; and / or The fixing strap is made of a non-metallic material.

8. The battery module according to claim 2, characterized in that, The end plates are made of a non-metallic material; and / or The end plates are provided with hoisting holes; and / or The end plates are provided with heat dissipation holes.

9. The battery module according to claim 1, characterized in that, The outer edge of the third insulating plate away from the first insulating plate is provided with a limiting plate extending toward the side close to the battery cell assembly, and the limiting plate abuts against the side of the battery cell assembly away from the first insulating plate; and / or The first insulating plate and the CCS assembly are connected by fasteners; and / or Structural adhesive is arranged on the side of the battery cell assembly away from the first insulating plate.

10. The battery module according to claim 9, wherein, The fasteners are made of a non-metallic material.

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