Battery pack

Abstract

The utility model provides a battery pack. The battery pack comprises a box body; the separation mechanism is arranged in the box body and divides the internal space of the box body into an electrical bin and a battery bin, and the separation mechanism comprises a flexible separation piece; the electrical assembly is arranged in the electrical bin and comprises a collection plate and a collection wire, the collection wire is connected with the collection plate in an inserted mode, and the collection wire penetrates through the flexible partition part in the thickness direction of the flexible partition part and penetrates into the battery bin; the battery module is arranged in the battery compartment and comprises a battery cell, and the acquisition line penetrates into the battery compartment and acquires parameters of the battery cell; and a gap in the battery compartment is filled with the polystyrene foam. According to the utility model, the internal space of the box body is divided into the electrical cabin and the battery cabin through the separation mechanism, so that the electrical cabin and the battery cabin are isolated, and polystyrene foam is not easy to enter a splicing gap between the collection line and the collection plate.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack. Background Art

[0002] The battery pack case is a structure used to mount and enclose the battery pack. Existing battery pack cases typically have a battery mounting space for the battery pack and an electrical mounting space for electrical components (including FPC wiring harnesses and acquisition boards). To insulate the battery cells and enhance the overall strength of the battery pack, foam glue is typically placed between the battery packs. During the foaming process, the foam glue can spread from the battery mounting space to the electrical mounting space, entering the gap between the FPC wiring harness and the acquisition board, resulting in a poor connection between the two. Utility Model Content

[0003] The embodiment of the utility model provides a battery pack, which can improve the technical problem of poor connection between the acquisition line and the acquisition board caused by foam glue entering the plugging gap between the two, existing in the existing battery pack.

[0004] An embodiment of the present invention provides a battery pack, comprising:

[0005] Box;

[0006] A partition mechanism is disposed in the box body and divides the internal space of the box body into an electrical compartment and a battery compartment, the partition mechanism comprising a flexible partition;

[0007] An electrical component is provided in the electrical compartment and includes a collection board and a collection line, wherein the collection line is plugged into the collection board and passes through the flexible partition along the thickness direction of the flexible partition and into the battery compartment;

[0008] A battery module is disposed in the battery compartment and includes battery cells, and the acquisition line penetrates the battery compartment and acquires parameters of the battery cells;

[0009] The foam glue is used to fill the gap in the battery compartment.

[0010] In an embodiment of the present invention, a collection cable is passed through the flexible separator along its thickness and into the battery compartment, allowing it to enter the battery compartment and collect the cell parameters. Furthermore, the flexible separator's ability to deform not only facilitates the passage of the collection cable but also protects it from battery pack vibration. A partitioning mechanism separates the interior of the box into the electrical compartment and the battery compartment, isolating them. This prevents foam from entering the gap between the collection cable and the collection board, thus preventing a poor connection between the two.

[0011] In one embodiment, the box body includes a top cover, a bottom plate and a frame, the top cover and the bottom plate are arranged on both sides of the frame relative to each other, and are respectively connected to the frame to form the internal space of the box body, the frame includes a first extension part and a second extension part relative to each other, and the four sides of the partition mechanism are respectively connected to the first extension part, the second extension part, the top cover and the bottom plate.

[0012] In the embodiment of the present invention, by connecting the four sides of the partition mechanism to the first extension part, the second extension part, the top cover and the bottom plate respectively, the partition mechanism can be fixed in the box body and the space in the box body can be separated at the same time.

[0013] In one embodiment, the partitioning mechanism is the flexible partitioning member, and four sides of the flexible partitioning member are respectively gap-fitted with and bonded to the first extension portion, the second extension portion, the top cover, and the bottom plate.

[0014] In an embodiment of the present invention, a flexible partition can be directly used as a partition mechanism, which can improve the overall deformation capacity of the partition mechanism. The partition mechanism is connected to the first extension part, the second extension part, the top cover and the bottom plate by bonding, so that the gaps around the flexible partition and the first extension part, the second extension part, the top cover and the bottom plate are sealed with glue, thereby better preventing foam glue from entering the electrical compartment.

[0015] In one embodiment, the partition mechanism further includes a crossbeam, which is fixedly connected to the base plate, the first extension portion, and the second extension portion; the flexible partition is fixedly arranged on the side of the crossbeam facing away from the base plate; and the flexible partition is gap-fitted and bonded to the top cover, the first extension portion, and the second extension portion.

[0016] In an embodiment of the present invention, the stability of the flexible partition can be improved by fixing the flexible partition on the side of the beam facing away from the bottom plate.

[0017] In one embodiment, the flexible separator is provided with a first through slot along its thickness direction, and the collection line passes through the first through slot into the battery compartment.

[0018] In an embodiment of the present invention, a first through slot is provided on the flexible separator along its thickness direction, and the collection line passes through the first through slot into the battery compartment, which facilitates installation of the collection line.

[0019] In one embodiment, the first through slot is disposed at a position of the flexible partition close to the top cover.

[0020] In an embodiment of the present invention, when the foam glue fills the battery compartment, it is usually filled gradually from the bottom plate to the top cover. By setting the first through groove at a position of the flexible partition close to the top cover, the foam glue can be further prevented from entering the electrical compartment.

[0021] In one embodiment, a plurality of collection lines are provided, a plurality of first through slots are provided, and the plurality of first through slots correspond one-to-one to the plurality of collection lines, and each collection line passes through the corresponding first through slot into the battery compartment.

[0022] In an embodiment of the present invention, by arranging a one-to-one correspondence between multiple first through-grooves and multiple collection lines, compared to setting multiple collection lines in one first through-groove, the size of the first through-groove can be made relatively smaller, thereby making the connection with the collection lines tighter, and facilitating the installation of the collection lines, thereby preventing foam glue from entering the electrical compartment through the first through-groove.

[0023] In one embodiment, the collection line is interference fit with the first through slot.

[0024] In the embodiment of the present invention, by making the collection line and the first through slot have an interference fit, the collection line and the first through slot can be tightly combined, which can prevent the foam glue from entering the electrical compartment through the first through slot.

[0025] In one embodiment, the electrical component further includes a copper busbar, which passes through the flexible partition along the thickness direction of the flexible partition and into the battery compartment.

[0026] In an embodiment of the present invention, since the flexible separator has the ability to deform, the copper busbar can be installed by passing through the flexible separator along the thickness direction of the flexible separator into the battery compartment, which can protect the copper busbar when the battery pack vibrates.

[0027] In one embodiment, the flexible separator is provided with a second through slot along its thickness direction, and the copper busbar passes through the second through slot into the battery compartment.

[0028] In an embodiment of the present invention, a second through slot is provided in the flexible separator along its thickness direction, and the copper busbar is passed through the first through slot into the battery compartment, thereby facilitating the installation of the copper busbar.

[0029] In one embodiment, the second through slot is disposed at a position of the flexible partition close to the top cover.

[0030] In an embodiment of the present invention, when the foam glue fills the battery compartment, it is usually filled gradually from the bottom plate to the top cover. By setting the second through groove at the position where the flexible partition is connected close to the top cover, the foam glue can be further prevented from entering the electrical compartment.

[0031] In one embodiment, the battery pack further includes a liquid cooling tube, which passes through the flexible partition along the thickness direction of the flexible partition and passes through the electrical compartment into the battery compartment, and structural adhesive is provided between the liquid cooling tube and the flexible partition.

[0032] In the embodiments of the present invention, the flexible separator's deformability allows the liquid cooling tube to be passed through the separator along its thickness, thereby extending from the electrical compartment into the battery compartment. This facilitates installation of the liquid cooling tube and protects it from battery pack vibration. Structural adhesive is applied between the liquid cooling tube and the flexible separator, ensuring a tight bond between the tube and the separator and preventing foam from entering the electrical compartment through the gap between the tube and the separator. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 is an exploded view of a battery pack provided in an embodiment of the present utility model;

[0035] Figure 2 is a partial schematic diagram of a battery pack provided in an embodiment of the present utility model;

[0036] Figure 3 This is a structural diagram of a separation mechanism provided by an embodiment of the present utility model;

[0037] Figure 4 This is a structural diagram of a separation mechanism provided by an embodiment of the present utility model.

[0038] Description of the drawings: Box body 1; top cover 11; bottom plate 12; frame 13; first extension portion 131; second extension portion 132; partition mechanism 2; flexible partition 21; first through slot 211; second through slot 212; crossbeam 22; electrical component 3; collection board 31; collection line 32; copper busbar 33; battery cell 4; foam glue 5; liquid cooling tube 6. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0040] See also Figure 1-4 , an embodiment of the present utility model provides a battery pack, comprising:

[0041] Box 1;

[0042] A partition mechanism 2 is provided in the box body 1 and divides the internal space of the box body 1 into an electrical compartment and a battery compartment. The partition mechanism 2 includes a flexible partition 21;

[0043] The electrical component 3 is provided in the electrical compartment and includes a collection board 31 and a collection line 32. The collection line 32 is plugged into the collection board 31 and passes through the flexible partition 21 along the thickness direction of the flexible partition 21 and into the battery compartment.

[0044] A battery module is provided in the battery compartment and includes a battery cell 4. The acquisition line 32 penetrates the battery compartment and acquires parameters of the battery cell 4.

[0045] The foam glue 5 fills the gap in the battery compartment.

[0046] It can be understood that the electrical compartment and the battery compartment in the present application are separated into two independent spaces by the partition mechanism 2, and the two need to be kept in an isolated state as much as possible to prevent the foam glue 5 from entering the battery compartment, thereby preventing the foam glue 5 from covering the electrical components 3 in the electrical compartment, and facilitating the inspection and maintenance of the electrical components 3. The flexible partition 21 can be made of a flexible material, such as EVA foam, so that the flexible partition 21 has a certain deformation ability, and thus the components passing through the flexible partition 21 are not easily damaged when the battery pack vibrates. The acquisition line 32 is a component for collecting parameters such as temperature and pressure in the battery module, such as an FPC cable. One end of the FPC cable needs to be set close to the battery cell 4, and the other end needs to be connected to the acquisition board 31. The acquisition line 32 and the acquisition board 31 can be connected by plugging the terminals of the acquisition line 32 into the terminals of the acquisition board 31. In addition to the acquisition board 31 and the acquisition line 32, the electrical components 3 can also include a low-voltage line, a BDU, a BMS main board, and a copper bus 33. The low-voltage line, the BDU, and the BMS main board are arranged in the electrical compartment. One end of the copper bus 33 is connected to the BDU, and the other end extends to the battery compartment and is connected to the CCS in the battery compartment.

[0047] In one embodiment, the box body 1 includes a top cover 11, a bottom plate 12 and a frame 13. The top cover 11 and the bottom plate 12 are relatively arranged on both sides of the frame 13, and are respectively connected to the frame 13 to form the internal space of the box body 1. The frame 13 includes a first extension portion 131 and a second extension portion 132 relative to each other. The four sides of the partition mechanism 2 are respectively connected to the first extension portion 131, the second extension portion 132, the top cover 11 and the bottom plate 12.

[0048] It is understood that the bottom plate 12 and the frame 13 can be integrally formed or separately formed. The four sides of the partition mechanism 2 are respectively connected to the first extension portion 131, the second extension portion 132, the top cover 11, and the bottom plate 12. The partition mechanism 2 can be respectively connected vertically to the first extension portion 131, the second extension portion 132, the top cover 11, and the bottom plate 12.

[0049] See also Figure 3 In one embodiment, the partition mechanism 2 is the flexible partition 21 , and the four sides of the flexible partition 21 are respectively gap-fitted and bonded with the first extension portion 131 , the second extension portion 132 , the top cover 11 and the bottom plate 12 .

[0050] It can be understood that the partitioning mechanism 2 is the flexible partitioning member 21, i.e., the partitioning mechanism 2 is made entirely of a flexible material. The flexible partitioning member 21 is bonded to the first extension 131, the second extension 132, the top cover 11, and the bottom plate 12 on all sides. Glue can be applied to all sides of the flexible partitioning member 21 to bond them to the first extension 131, the second extension 132, the top cover 11, and the bottom plate 12. When installing the flexible partitioning member 21, glue can be applied to all sides of the flexible partitioning member 21 in advance. Alternatively, glue can be applied to portions of the flexible partitioning member 21 to bond them to the first extension 131, the second extension 132, the top cover 11, and the bottom plate 12. The adhesive used for bonding can be a structural adhesive to increase the strength of the flexible partitioning member 21. Fixing members may be provided at both ends of the flexible separator 21 in the thickness direction. The flexible separator 21 may be clamped in the fixing members on both sides to improve the stability of the flexible separator 21 .

[0051] In one embodiment, the flexible partition 21 may be slightly larger than the longitudinal cross-sectional dimension of the interior space of the box 1 , so that when the flexible partition 21 is installed in the box 1 , the four sides of the flexible partition 21 may be pressed tightly against the inner wall of the box 1 .

[0052] It should be noted that this application does not limit the specific numerical range of the width size of the flexible partition 21 being larger than the longitudinal cross-sectional size of the internal space of the box body 1, as long as the installation of the flexible partition 21 can be facilitated and the four sides of the flexible partition 21 can be pressed tightly against the inner wall of the box body 1 after the installation is completed.

[0053] See also Figure 4 In one embodiment, the partition mechanism 2 further includes a crossbeam 22, which is fixedly connected to the bottom plate 12, the first extension portion 131, and the second extension portion 132. The flexible partition 21 is fixedly arranged on the side of the crossbeam 22 away from the bottom plate 12, and the flexible partition 21 is gap-fitted and bonded to the top cover 11, the first extension portion 131, and the second extension portion 132.

[0054] It is understandable that the crossbeam 22 can be made of a material with a certain hardness. The crossbeam 22 can be connected to the bottom plate 12, the first extension portion 131 and the second extension portion 132 by welding, or by screws, or can be set as an integral part with the bottom plate 12. The crossbeam 22 is welded or set as an integral part with the bottom plate 12, the first extension portion 131 and the second extension portion 132, which can improve the tightness of the connection between the crossbeam 22 and the box body 1 and help prevent the foam 5 from entering the electrical compartment. The crossbeam 22 can also be used to fix other electrical components 3 in the electrical compartment, such as the acquisition board 31, to improve the structural stability of the electrical compartment. The flexible partition 21 and the crossbeam 22 can be fixedly connected by structural adhesive to improve the tightness of the connection between the two.

[0055] In one embodiment, the thickness of the flexible partition 21 can be smaller than the thickness of the crossbeam 22, and the flexible partition 21 can be arranged close to the battery compartment, whereby the side of the flexible partition 21 close to the electrical compartment and the crossbeam 22 together define a step portion to allow other electrical components 3 in the electrical compartment to be installed and fixed.

[0056] In one embodiment, the flexible separator 21 is provided with a first through slot 211 along its thickness direction, and the collection line 32 passes through the first through slot 211 and enters the battery compartment.

[0057] It is understood that the shape and size of the first through-slot 211 can be set according to the shape and size of the collection line 32. When the first through-slot 211 is provided on the flexible partition 21, the flexible partition 21 and the box body 1 can be bonded together by providing glue on the peripheral surface of the flexible partition 21 (including the surface of the collection line 32 facing away from the bottom of the first through-slot 211) after the collection line 32 is set in the first through-slot 211, and then bonding the flexible partition 21 to the box body 1, thereby improving the tightness of the connection between the flexible partition 21 and the box body 1.

[0058] In one embodiment, the first through slot 211 is disposed at a position of the flexible partition 21 close to the top cover 11 .

[0059] Exemplarily, the first through groove 211 passes through both side surfaces of the flexible partition 21 along the thickness direction thereof, as well as the surface of the flexible partition 21 close to the top cover 11 .

[0060] It can be understood that the foam glue 5 will expand during the filling process. During filling, it can be gradually filled from the bottom plate 12 to the top cover 11. Since the expansion performance of the foam glue 5 is limited, by opening the first through groove 211 at a position close to the top cover 11 of the flexible partition 21, the probability of the foam glue 5 entering the electrical compartment through the first through groove 211 can be reduced to a certain extent.

[0061] In one embodiment, a plurality of acquisition lines 32 are provided, a plurality of first through slots 211 are provided, and the plurality of first through slots 211 correspond one-to-one to the plurality of acquisition lines 32 , and each acquisition line 32 passes through the corresponding first through slot 211 into the battery compartment.

[0062] It can be understood that the acquisition line 32 is used to acquire parameters within the battery module. In order to acquire parameters at various locations within the battery module, multiple acquisition lines 32 can be provided, thereby improving the accuracy of the parameters.

[0063] In one embodiment, the collection line 32 is interference fit with the first through slot 211 .

[0064] In one embodiment, the electrical component 3 further includes a copper busbar 33 , and the copper busbar 33 passes through the flexible partition 21 along the thickness direction of the flexible partition 21 and into the battery compartment.

[0065] It can be understood that one end of the copper busbar 33 needs to be connected to the BDU, and the other end needs to extend to the battery compartment and connect to the CCS inside the battery compartment, and the CCS is then electrically connected to the battery cell 4, thereby realizing the electrical connection between the copper busbar 33 and the battery cell 4. Therefore, the copper busbar 33 needs to be passed through the flexible partition 21.

[0066] In one embodiment, the flexible separator 21 is provided with a second through slot 212 along its thickness direction, and the copper busbar 33 passes through the second through slot 212 and enters the battery compartment.

[0067] It can be understood that the shape and size of the second through-slot 212 can be set according to the shape and size of the copper busbar 33. If the copper busbar 33 is in the form of a sheet, the thickness direction of the copper busbar 33 is the same as the depth direction of the second through-slot 212. When the second through-slot 212 is provided on the flexible partition 21, the flexible partition 21 and the box body 1 can be bonded by providing glue on the peripheral surface of the flexible partition 21 (including the surface of the copper busbar 33 facing away from the bottom of the first through-slot 211) after the copper busbar 33 is set in the second through-slot 212, and then bonding with the box body 1, thereby improving the tightness of the connection between the flexible partition 21 and the box body 1.

[0068] In one embodiment, the second through slot 212 is disposed at a position of the flexible partition 21 close to the top cover 11 .

[0069] It can be understood that the foam glue 5 will expand during the filling process. During filling, it is usually filled gradually from the bottom plate 12 to the top cover 11. Since the expansion performance of the foam glue 5 is limited, by opening the second through groove 212 at a position close to the top cover 11 of the flexible partition 21, the probability of the foam glue 5 entering the electrical compartment through the second through groove 212 can be reduced to a certain extent.

[0070] In one embodiment, the battery pack further includes a liquid cooling tube 6 , which passes through the flexible partition 21 along the thickness direction of the flexible partition 21 and passes from the electrical compartment into the battery compartment, and structural adhesive is provided between the liquid cooling tube 6 and the flexible partition 21 .

[0071] It can be understood that the liquid cooling pipe 6 is used to cool the battery pack. The inlet and outlet of the liquid cooling pipe 6 are set at the edge of the electrical compartment. The liquid cooling pipe 6 needs to extend into the battery compartment to cool the battery cells 4. Therefore, the liquid cooling pipe 6 needs to be passed through the flexible separator 21. The liquid cooling pipe 6 passes through the flexible separator 21 along the thickness direction of the flexible separator 21. This can be achieved by opening a through hole in the flexible separator 21, passing the liquid cooling pipe 6 through the through hole, and filling the through hole with structural adhesive, so that the liquid cooling pipe 6 can be effectively fixed and tightly connected to the flexible separator 21.

[0072] It should be noted that the specific setting of the liquid cooling structure in the battery compartment that is connected to the liquid cooling pipe 6 and cooperates to achieve liquid cooling can refer to the relevant technology. Since this part is not the improvement point of this application, it will not be introduced in detail.

[0073] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, based on the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A battery pack, characterized in that: include: Box; A partition mechanism is disposed in the box body and divides the internal space of the box body into an electrical compartment and a battery compartment, the partition mechanism comprising a flexible partition; An electrical component is provided in the electrical compartment and includes a collection board and a collection line, wherein the collection line is plugged into the collection board and passes through the flexible partition along the thickness direction of the flexible partition and into the battery compartment; A battery module is disposed in the battery compartment and includes battery cells, and the acquisition line penetrates the battery compartment and acquires parameters of the battery cells; The foam glue is used to fill the gap in the battery compartment.

2. The battery pack according to claim 1, wherein: The box body includes a top cover, a bottom plate and a frame. The top cover and the bottom plate are arranged on both sides of the frame relative to each other and are respectively connected to the frame to form the internal space of the box body. The frame includes a first extension part and a second extension part relative to each other. The four sides of the partition mechanism are respectively connected to the first extension part, the second extension part, the top cover and the bottom plate.

3. The battery pack according to claim 2, wherein: The partitioning mechanism is the flexible partitioning member, and four sides of the flexible partitioning member are respectively fitted with and bonded to the first extension portion, the second extension portion, the top cover, and the bottom plate.

4. The battery pack according to claim 2, wherein: The partition mechanism also includes a crossbeam, which is fixedly connected to the base plate, the first extension portion and the second extension portion. The flexible partition is fixedly arranged on the side of the crossbeam away from the base plate. The flexible partition is gap-fitted and bonded with the top cover, the first extension portion and the second extension portion.

5. The battery pack according to claim 2, wherein: The flexible separator is provided with a first through slot along its thickness direction, and the collection line passes through the first through slot into the battery compartment.

6. The battery pack according to claim 5, characterized in that: The first through slot is arranged at a position of the flexible partition close to the top cover.

7. The battery pack according to claim 5, characterized in that: There are multiple collection lines, and multiple first through slots. The multiple first through slots correspond to the multiple collection lines one by one, and each collection line passes through the corresponding first through slot into the battery compartment.

8. The battery pack according to claim 5, characterized in that: The collection line is interference-fitted with the first through slot.

9. The battery pack according to claim 2, wherein: The electrical component further includes a copper busbar, which passes through the flexible partition along the thickness direction of the flexible partition and into the battery compartment.

10. The battery pack according to claim 9, characterized in that: The flexible separator is provided with a second through slot along its thickness direction, and the copper busbar passes through the second through slot into the battery compartment.

11. The battery pack according to claim 10, characterized in that: The second through slot is arranged at a position of the flexible partition close to the top cover.

12. The battery pack according to claim 1, wherein: The battery pack also includes a liquid cooling tube, which passes through the flexible partition along the thickness direction of the flexible partition and penetrates the battery compartment from the electrical compartment. Structural adhesive is provided between the liquid cooling tube and the flexible partition.

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