Battery pack and electric equipment

Abstract

The utility model relates to the technical field of new energy batteries, and discloses a battery pack and electric equipment, the battery pack has a first direction, a second direction and a third direction, the battery pack comprises: a battery cell, the battery cell has a pole and a first wall surface; the CCS assembly comprises a flexible circuit board, busbars and an electrical isolation board, the electrical isolation board comprises a plurality of base body parts, first connecting parts and second connecting parts, the busbars are assembled on the base body parts, the busbars are conductively connected with the pole columns, the first connecting parts are connected with the base body parts, and the second connecting parts are connected with the first connecting parts; the flexible circuit board comprises a main body part and a connecting end, and the first connecting part covers the main body part in the third direction. The flexible circuit board is arranged between the electrical isolation plate and the first wall surface of the battery cell, and the flexible circuit board is stored by reasonably utilizing the pole height space of the battery cell, so that the volume energy density of the battery pack can be improved; and the first connecting part protects the main body part of the flexible circuit board, so that the flexible circuit board is prevented from being damaged.

Description

Technical Field

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

[0002] The power battery pack used in electric vehicles, which provides the vehicle's power, has a volumetric energy density determined by the amount of charge that can be effectively packed into the battery cells within a given space. This metric measures the energy storage capacity per unit volume. This metric is crucial for evaluating battery performance, as it directly relates to the total amount of energy a battery can provide within a given space. Battery packs with high volumetric energy density can store more energy within the same volume, helping to improve the device's battery life and provide users with longer battery life.

[0003] For battery packs, the Z-direction (height) has a greater impact on the pack's volume than adjustments to the X and Y dimensions. When designing a battery pack while keeping other dimensions unchanged, reducing the Z-direction height means more battery cells can be accommodated within the same volume, effectively improving the overall pack's volume utilization and increasing the pack's volumetric energy density. Therefore, maximizing the use of Z-direction space and effectively increasing the battery pack's volumetric energy density is an industry-wide goal.

[0004] Currently, the design of traditional CCS components is to set a flexible circuit board (Flexible Printed Circuit, FPC) above the electrical isolation board, and use the flexible circuit board to collect information such as temperature and voltage of the battery cells in the battery module. However, this method will take up extra space in the Z direction, and the FPC is set on the outside and is also susceptible to damage caused by external impurities, such as welding slag splashing when welding busbars and poles. Utility Model Content

[0005] The purpose of the present invention is to provide a battery pack to solve the problem in the prior art that the flexible circuit board in the battery pack occupies extra height space and is easily damaged by impurities; the present invention also provides an electrical device using the battery pack.

[0006] In order to achieve the above object, the present invention provides a battery pack, wherein the battery pack has a first direction, a second direction, and a third direction intersecting in pairs, and the battery pack includes:

[0007] A battery cell, the battery cell comprising a pole and a first wall surface for mounting the pole;

[0008] A CCS assembly, the CCS assembly being mounted on the first wall surface, the CCS assembly comprising a flexible circuit board, a busbar, and an electrical isolation plate, the electrical isolation plate comprising a base portion, a first connecting portion extending along the first direction, and a second connecting portion connected along the second direction, wherein the base portion, the first connecting portion, and the second connecting portion are each provided in plurality, the busbar being mounted on the base portion, the busbar being conductively connected to the pole, the first connecting portion being connected to each of the base portions, and the second connecting portion being connected to each of the first connecting portions;

[0009] The electrical isolation plate is arranged within the height range of the pole along the third direction, the flexible circuit board is arranged between the electrical isolation plate and the first wall, the flexible circuit board includes a main body and a connecting end connected to the main body, the main body extends along the first direction, and the first connecting portion covers the main body along the third direction.

[0010] Preferably, the first connecting portion includes a raised section and a recessed section, the raised section and the recessed section extend along the third direction, the raised section and the recessed section are alternately distributed along the first direction, and the raised section and the recessed section form a glue hole for structural glue to pass through.

[0011] Preferably, the raised section and the recessed section are both rectangular groove structures.

[0012] Preferably, the base portion has an assembly groove on a side facing away from the battery core, the assembly groove has a first notch for the pole to pass through along the third direction, and the busbar is embedded in the assembly groove.

[0013] Preferably, the assembly groove further has a second notch, and the flexible circuit board further includes a voltage collection part and a temperature collection part, the voltage collection part and the temperature collection part are located on both sides of the main body along the second direction, the voltage collection part is electrically connected to the bus, the temperature collection part is in contact with the first wall surface, the voltage collection part is embedded in the second notch, and the first notch is connected to the second notch.

[0014] Preferably, the electrical isolation plate further includes a first positioning column extending along the third direction, the first positioning column is assembled in the assembly groove, the busbar has a first positioning hole, and the first positioning column is passed through the first positioning hole along the third direction.

[0015] Preferably, the first wall surface has a window area, and the first connecting portion, the second connecting portion and the base portion form a window for the structural adhesive to pass through, and the window is connected to the window area.

[0016] Preferably, the connecting end includes a connector and a connecting section, the connecting section is connected between the connector and the main body, and the connecting section has a plurality of telescopic joints.

[0017] Preferably, it also includes a positioning member, which is assembled on the first wall surface, and has positioning grooves at both ends of the positioning member along the second direction, and the positioning grooves are for the pole to be embedded. The positioning member also has a second positioning column, and the base part has a second positioning hole, and the second positioning column is embedded in the second positioning hole along the third direction.

[0018] The utility model also provides an electrical device, comprising the battery pack described in any of the above technical solutions.

[0019] Compared with the prior art, a battery pack and electrical equipment according to an embodiment of the present invention have the following beneficial effects: the poles of the battery cells occupy space in the third direction, the flexible circuit board of the CCS assembly is arranged between the electrical isolation plate and the first wall of the battery cells, and the flexible circuit board is reasonably stored in the space at the height of the poles of the battery cells, which can reduce the additional occupation of the space in the third direction and improve the volume energy density of the battery pack; the base portion, the first connecting portion and the second connecting portion of the electrical isolation plate are connected as a whole to ensure the strength of the electrical isolation plate, the first connecting portion covers the main body of the flexible circuit board along the third direction to protect the main body of the flexible circuit board, and minimizes the intrusion of external factors on the flexible circuit board during the assembly process to avoid damage to the flexible circuit board; at the same time, the flexible circuit board, the bus and the electrical isolation plate are integrated into the CCS assembly, which can reduce the number of components, improve the integration performance of the battery pack, and can improve the rigidity of the CCS assembly and the restraint force on the single battery cell, thereby improving the safety performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the battery pack of the present invention;

[0021] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the battery pack from another perspective;

[0022] Figure 3 yes Figure 2 A partial enlarged schematic diagram of the battery pack at point A;

[0023] Figure 4 yes Figure 2 A partial enlarged schematic diagram of point B of the battery pack;

[0024] Figure 5 yes Figure 2 A top view of the CCS assembly of the battery pack with the cells omitted;

[0025] Figure 6 yes Figure 5 A partial enlarged schematic diagram of the CCS component at C;

[0026] Figure 7 yes Figure 6 Schematic diagram of the structure of the CCS component after omitting the busbar;

[0027] Figure 8 This is a schematic diagram of the partial structure of the flexible circuit board of the battery pack of the present utility model;

[0028] Figure 9 This is a diagram of the assembly nodes of the battery cell and the electrical isolation plate of the battery pack of the present invention;

[0029] Figure 10 yes Figure 9 A schematic diagram of the assembly structure of the battery cell and the positioning parts after the electrical isolation plate is omitted in the battery pack;

[0030] Figure 11 yes Figure 10 Schematic diagram of the structure of the positioning parts in the battery pack.

[0031] In the figure, 1. battery cell, 11. pole, 12. first wall, 13. window area, 2. CCS assembly, 3. flexible circuit board, 31. main body, 32. connection end, 321. connector, 322. connection section, 323. expansion joint, 33. voltage collection part, 34. temperature collection part, 4. bus, 41. first positioning hole, 5. electrical isolation plate, 51. base, 511. assembly groove, 512. first notch, 513. second notch, 52. first connecting part, 521. raised section, 522. recessed section, 523. glue hole, 53. second connecting part, 54. first positioning column, 55. second positioning hole, 56. window, 6. positioning piece, 61. positioning groove, 62. second positioning column, X, first direction, Y, second direction, Z, third direction. DETAILED DESCRIPTION

[0032] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] A preferred embodiment of a battery pack of the present utility model is as follows: Figures 1 to 11 As shown, the battery pack has a first direction X, a second direction Y, and a third direction Z that intersect with each other. In this embodiment, the first direction X is the length direction of the battery pack, the second direction Y is the width direction of the battery pack, and the third direction Z is the height direction of the battery pack. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0034] The battery pack includes a battery cell 1 and a CCS assembly 2. The battery cell 1 is composed of multiple cells 1 arranged in a second direction Y to form a module, and multiple modules are arranged along the first direction X. The battery cell 1 has a pole 11 and a first wall 12. The pole 11 includes a positive pole 11 and a negative pole 11, and both the positive pole 11 and the negative pole 11 are assembled on the first wall 12. In this embodiment, the first wall 12 is the top surface of the battery cell 1, and the CCS assembly 2 is assembled on the first wall 12.

[0035] The CCS assembly 2 includes a flexible circuit board 3, a busbar 4 and an electrical isolation board 5. The flexible circuit board 3 is used to collect voltage and temperature information of the battery cell 1. The electrical isolation board 5 is used to achieve electrical isolation between the battery cell 1 and the outside world, increase the creepage distance, and improve the safety of the battery pack. The busbar 4 is used to contact the poles 11 of different polarities of adjacent battery cells 1 to achieve electrical connection between adjacent battery cells 1.

[0036] Combining the flexible circuit board 3, the busbar 4 and the electrical isolation board 5 to form the CCS component 2 and integrating them into an integrated component can reduce the number of battery pack components, improve the integration performance of the battery pack, make the assembly of the battery pack faster and more convenient, and improve the efficiency of the assembly production line; it can also improve the rigidity of the CCS assembly, to a certain extent increase the restraint on the battery cell 1, improve the problem of thermal expansion of the battery cell 1 and deformation of the battery pack, and improve the safety performance of the battery pack.

[0037] The electrical isolation plate 5 includes a base portion 51, a first connecting portion 52 and a second connecting portion 53. There are multiple base portions 51, multiple first connecting portions 52 and multiple second connecting portions 53. Each base portion 51 is assembled on the upper side of the pole 11 of the battery cell 1. The first connecting portion 52 extends along the first direction X, and the second connecting portion 53 extends along the second direction Y. The first connecting portion 52 connects each base portion 51, and the second connecting portion 53 connects each first connecting portion 52. The base portion 51 is connected as a whole through the first connecting portion 52 and the second connecting portion 53 to ensure the strength of the electrical isolation plate 5.

[0038] The busbar 4 is mounted on the base 51 of the electrical isolation plate 5 and electrically connected to the poles 11 of the battery cells 1. Multiple busbars 4 are provided to electrically connect poles 11 of different polarities on adjacent groups of battery cells 1. The poles 11 themselves are of a certain height, and the busbar 4 contacts and connects to the side surfaces of the upper ends of the poles 11. The busbar 4 is arranged on the side of the electrical isolation plate 5 facing away from the first wall 12. The electrical isolation plate 5 can be used to increase the safety gap between the busbar 4 and the external electrical environment, thereby improving electrical safety.

[0039] The electrical isolation plate 5 is positioned within the height range of the pole 11 along the third direction Z. The flexible circuit board 3 is positioned between the electrical isolation plate 5 and the first wall 12 of the battery cell 1. In the third direction Z, the flexible circuit board 3 is positioned above the first wall 12 and below the electrical isolation plate 5, rather than being positioned above the electrical isolation plate 5 as is conventionally done. This effectively utilizes the height space provided by the pole 11 itself and avoids occupying additional space in the third direction Z. Furthermore, the electrical isolation plate 5, positioned above the flexible circuit board 3, provides shielding and protection for the flexible circuit board 3, reducing the harmful effects of external factors on the flexible circuit board 3.

[0040] The flexible circuit board 3 includes a main body 31 and a connection end 32. The connection end 32 is connected to the main body 31. The main body 31 is used to collect voltage signals and temperature signals of the battery cell 1. The connection end 32 is used to connect to an external battery management system and transmit the voltage and temperature signals collected by the main body 31 to the battery management system.

[0041] The main body 31 of the flexible circuit board 3 extends along a first direction X, and the first connecting portion 52 of the electrical isolation plate 5 covers the main body 31 of the flexible circuit board 3 along a third direction Z. The main body 31 is the portion of the flexible circuit board 3 located most above the battery cell 1. With the main body 31 covered by the first connecting portion 52, the electrical isolation plate 5 can cover most of the flexible circuit board 3, providing shielding and protection for the flexible circuit board 3. This minimizes external interference with the flexible circuit board 3 during assembly, preventing the flexible circuit board 3 from being affected or even being scrapped.

[0042] The pole 11 of the battery cell 1 of the battery pack will occupy space in the third direction Z. The flexible circuit board 3 of the CCS assembly 2 is arranged between the electrical isolation plate 5 and the first wall 12 of the battery cell 1. The height space of the pole 11 of the battery cell 1 is reasonably utilized to store the flexible circuit board 3, which can reduce the additional occupation of the third direction Z space and improve the volume energy density of the battery pack; the base portion 51, the first connecting portion 52 and the second connecting portion 53 of the electrical isolation plate 5 are connected as a whole to ensure the strength of the electrical isolation plate 5. The first connecting portion 52 covers the main body 31 of the flexible circuit board 3 along the third direction Z to protect the main body 31 of the flexible circuit board 3, minimize the intrusion of external factors on the flexible circuit board 3 during the assembly process, and avoid damage to the flexible circuit board 3; at the same time, the flexible circuit board 3, the bus 4 and the electrical isolation plate 5 are integrated into the CCS assembly 2, which can reduce the number of components, improve the integration performance of the battery pack, and can improve the rigidity of the CCS assembly 2 and the restraint force on the single battery cell 1, thereby improving the safety performance of the battery pack.

[0043] Preferably, the first connecting portion 52 includes a raised section 521 and a recessed section 522, which extend along the third direction Z. The raised section 521 and the recessed section 522 are alternately distributed along the first direction X, and the raised section 521 and the recessed section 522 form a glue hole 523 for the structural glue to pass through.

[0044] The raised sections 521 and the recessed sections 522 are alternately distributed along the first direction X, and the first connecting portion 52 forms a stepped structure. After the electrical isolation plate 5 is assembled on the first wall surface 12 of the battery cell 1, an undulating opening area is formed in the area between the raised section 521 and the recessed section 522, and between the raised section 521 and the first wall surface 12 of the battery cell 1. In order to improve the connection and fixation effect between the battery cell 1 and the battery pack, glue is filled between the battery cell 1 and the upper cover of the battery pack. When the glue is poured into the battery pack, the glue can pass through the undulating opening area, so that the glue is evenly distributed. At the same time, the glue will cover the raised section 521 and the recessed section 522. That is, the first connecting portion 52 of the electrical isolation plate 5 will exist in the form of an embedded glue layer, which increases the contact area between the electrical isolation plate 5 and the glue, further improving the bonding strength and the assembly strength of the electrical isolation plate 5.

[0045] Preferably, both the raised section 521 and the recessed section 522 are rectangular groove structures.

[0046] The rectangular groove structure has a large inner and outer surface area, which can further increase the contact area between the electrical isolation plate 5 and the glue. In other embodiments, the raised section 521 and the recessed section 522 can also be arc-shaped structures.

[0047] Preferably, the base portion 51 has an assembly groove 511 on a side facing away from the battery cell 1 . The assembly groove 511 has a first notch 512 for the pole 11 to pass through along the third direction Z. The busbar 4 is embedded in the assembly groove 511 .

[0048] The busbar 4 is embedded in the assembly groove 511, utilizing the electrical isolation performance of the electrical isolation plate 5 to ensure electrical safety clearance and creepage distance between the busbar 4 and the outside world, thereby improving the electrical safety of the busbar 4 during operation. The first notch 512 allows the pole 11 to pass through the base portion 51 along the third direction Z and then electrically connect to the busbar 4. The area of ​​the first notch 512 is larger than the area of ​​the pole 11 of the battery cell 1, making it easier for the pole 11 of the battery cell 1 to pass through the first notch 512.

[0049] The busbar 4 has an insulating layer on the plane facing away from the assembly groove 511, which can increase the electrical safety distance; at the same time, the plane on the side of the busbar 4 that contacts the assembly groove 511 is a normal metal surface. On the one hand, the insulating layer can be omitted because of the presence of the base part 51, and on the other hand, it is convenient for subsequent welding with the voltage collection part 33 of the flexible circuit board 3 to perform voltage collection.

[0050] Preferably, the assembly groove 511 further has a second notch 513, and the flexible circuit board 3 further includes a voltage collection part 33 and a temperature collection part 34. The voltage collection part 33 and the temperature collection part 34 are located on both sides of the main body 31 along the second direction Y. The voltage collection part 33 is electrically connected to the bus 4, and the temperature collection part 34 is in contact with the first wall 12. The voltage collection part 33 is embedded in the second notch 513, and the first notch 512 is connected to the second notch 513.

[0051] The mounting groove 511 also has a second notch 513. Since the flexible circuit board 3 is located below the electrical isolation plate 5 and the mounting groove 511 is located above the electrical isolation plate 5, the second notch 513 allows the voltage collection unit 33 of the flexible circuit board 3 to pass through the base 51 in the third direction Z and electrically connect to the bus 4, thereby directly collecting voltage information at the bus 4. The first notch 512 and the second notch 513 are connected, facilitating processing of the base 51.

[0052] The main body 31 of the flexible printed circuit board is an elongated strip extending along the first direction X. The voltage collection unit 33 and the temperature collection unit 34 are located on either side of the main body 31, effectively distributing the two units and increasing their layout space. The voltage collection unit 33, when in galvanic contact with the busbar 4, can collect voltage information at the busbar 4. The temperature collection unit 34, when in contact with the first wall 12 of the battery cell 1, can directly collect temperature information from the battery cell 1.

[0053] In this embodiment, the voltage collection unit 33 is provided with a nickel sheet, which passes through the second notch 513 and is electrically connected to the bus 4 to collect voltage information; the temperature collection unit 34 is provided with a thermistor, which is in contact with the first wall 12 to collect information on the temperature of the battery cell 1. In addition, foam is provided on the side of the thermistor facing away from the first wall 12. The foam can be bonded to the electrical isolation plate 5 to fix the temperature collection unit 34 and prevent the temperature collection unit 34 from moving during transportation and assembly.

[0054] Preferably, the electrical isolation plate 5 further includes a first positioning column 54 extending along the third direction Z, the first positioning column 54 is assembled in the assembly groove 511, the busbar 4 has a first positioning hole 41, and the first positioning column 54 is installed in the first positioning hole 41 along the third direction Z.

[0055] A first positioning post 54 is designed within the assembly slot 511 of the electrical isolation plate 5, and a first positioning hole 41 is provided on the busbar 4. Passing the first positioning post 54 through the first positioning hole 41 serves as a foolproofing mechanism, preventing the busbar 4 from being installed upside down or incorrectly. It also serves to position the busbar 4 within the assembly slot 511. The diameter of the first positioning post 54 is slightly smaller than the diameter of the first positioning hole 41, facilitating its insertion through the first positioning hole 41 along the third direction Z.

[0056] In this embodiment, there are multiple first positioning columns 54, and the multiple first positioning columns 54 can locate the position of the bus 4 during assembly, improve the position accuracy of the bus 4 installed on the electrical isolation plate 5, and then improve the alignment accuracy of the bus 4 with the pole 11 of the battery cell 1, thereby solving the problem of poor welding reliability between the bus 4 and the pole 11.

[0057] In addition, the first positioning column 54 can be flattened by hot pressing, so that the bus 4 and the electrical isolation plate 5 are fixed together by hot riveting through the first positioning column 54, preventing the bus 4 from falling off during subsequent transportation and assembly.

[0058] Preferably, the first wall surface 12 has a window area 13 , and the first connecting portion 52 , the second connecting portion 53 and the base portion 51 form a window 56 for the structural adhesive to pass through, and the window 56 is connected to the window area 13 .

[0059] Normally, the outer surface of the battery cell 1 is covered with an insulating layer to ensure electrical safety. The window area 13 is an area on the battery cell 1 that is not covered with an insulating layer. The metal shell of the battery cell 1 is exposed in the window area 13. The temperature collection portion 34 of the flexible circuit board 3 is arranged opposite to the window area 13 of the first wall 12. The temperature collection portion 34 can directly contact the metal shell of the battery cell 1, thereby more directly and accurately collecting the temperature of the battery cell 1 without being affected by the thermal conductivity of the insulating layer, thereby improving the accuracy of temperature information collection.

[0060] To enhance the connection and fixation between the battery cell 1 and the battery pack, glue is filled between the battery cell 1 and the battery pack cover, allowing them to form a tight connection and improving the strength of the entire pack. The insulating layer on the battery cell 1 has a low coefficient of friction, resulting in weak connection strength with the glue. The first connecting portion 52, the second connecting portion 53, and the base portion 51 form a window 56, which is connected to the window area 13. During the glue filling operation, the glue can flow through the window 56 to the window area 13, directly contacting and connecting with the metal shell of the battery cell 1, thereby improving the bonding strength.

[0061] Preferably, the connecting end 32 includes a connector 321 and a connecting section 322 . The connecting section 322 is connected between the connector 321 and the main body 31 . The connecting section 322 has a plurality of telescopic joints 323 .

[0062] Connector 321 is designed to plug into the connector of the battery management system's controller and transmit the voltage and temperature information collected by the flexible circuit board 3 as electrical signals. Connecting section 322 is provided with multiple expansion joints 323. When the flexible circuit board 3 is subjected to vibration, pulling, or impact, the expansion joints 323 of connecting section 322 expand, preventing the connecting section 322 from being subjected to excessive stress and tearing.

[0063] In this embodiment, the expansion joint 323 has a tortuous feature and may be a bent or wavy structure. The expansion joint 323 with the tortuous feature can buffer vibration and stress generated during the expansion of the battery cell 1 .

[0064] Preferably, it also includes a positioning member 6, which is assembled on the first wall 12, and has positioning grooves 61 at both ends of the positioning member 6 along the second direction Y, and the positioning grooves 61 are for the pole 11 to be embedded. The positioning member 6 also has a second positioning column 62, and the base portion 51 has a second positioning hole 55, and the second positioning column 62 is embedded in the second positioning hole 55 along the third direction Z.

[0065] The poles 11 of the battery cells 1 are inserted into the positioning grooves 61 along the second direction Y. During assembly, the positioning member 6 can be inserted between adjacent battery cells 1 to position the battery cells 1. Simultaneously, the second positioning posts 62 on the positioning member 6 are inserted into the second positioning holes 55 on the base portion 51 along the third direction Z. The electrical isolation plate 5 is positioned via the second positioning posts 62 and the second positioning holes 55. Using the positioning member 6 to simultaneously position the battery cells 1 and the electrical isolation plate 5 facilitates the relative positioning of the battery cells 1 and the electrical isolation plate 5, facilitating subsequent assembly operations.

[0066] The present invention also provides a preferred embodiment of an electrical device, including a battery pack. The specific structure of the battery pack is the same as the specific structure of the battery pack in any of the above embodiments, and will not be repeated here.

[0067] In summary, the embodiments of the present invention provide a battery pack and electrical equipment, the poles of the battery cells of which occupy space in the third direction, the flexible circuit board of the CCS assembly is arranged between the electrical isolation plate and the first wall of the battery cell, and the flexible circuit board is reasonably used to store the height space of the battery cell poles, which can reduce the additional occupation of the third direction space and improve the volume energy density of the battery pack; the base portion, the first connection portion and the second connection portion of the electrical isolation plate are connected as a whole to ensure the strength of the electrical isolation plate, and the first connection portion covers the main body of the flexible circuit board along the third direction to protect the main body of the flexible circuit board, thereby minimizing the intrusion of external factors on the flexible circuit board during the assembly process and avoiding damage to the flexible circuit board; at the same time, the flexible circuit board, the bus and the electrical isolation plate are integrated into a CCS assembly, which can reduce the number of components, improve the integration performance of the battery pack, and can improve the rigidity of the CCS assembly and the restraint force on the single battery cell, thereby improving the safety performance of the battery pack.

[0068] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A battery pack, characterized in that: The battery pack has a first direction, a second direction, and a third direction intersecting in pairs, and the battery pack includes: A battery cell, the battery cell comprising a pole and a first wall surface for mounting the pole; A CCS assembly, the CCS assembly being mounted on the first wall surface, the CCS assembly comprising a flexible circuit board, a busbar, and an electrical isolation plate, the electrical isolation plate comprising a base portion, a first connecting portion extending along the first direction, and a second connecting portion connected along the second direction, wherein the base portion, the first connecting portion, and the second connecting portion are each provided in plurality, the busbar being mounted on the base portion, the busbar being conductively connected to the pole, the first connecting portion being connected to each of the base portions, and the second connecting portion being connected to each of the first connecting portions; The electrical isolation plate is arranged within the height range of the pole along the third direction, the flexible circuit board is arranged between the electrical isolation plate and the first wall, the flexible circuit board includes a main body and a connecting end connected to the main body, the main body extends along the first direction, and the first connecting portion covers the main body along the third direction.

2. The battery pack according to claim 1, wherein: The first connecting portion includes a raised section and a recessed section, the raised section and the recessed section extend along the third direction, the raised section and the recessed section are alternately distributed along the first direction, and the raised section and the recessed section form a glue hole for structural glue to pass through.

3. The battery pack according to claim 2, wherein: The convex section and the concave section are both rectangular groove structures.

4. The battery pack according to any one of claims 1 to 3, characterized in that: The base portion has an assembly groove on a side facing away from the battery core. The assembly groove has a first notch for the pole to pass through along the third direction. The busbar is embedded in the assembly groove.

5. The battery pack according to claim 4, characterized in that: The assembly groove also has a second notch, and the flexible circuit board also includes a voltage collection part and a temperature collection part. The voltage collection part and the temperature collection part are located on both sides of the main body along the second direction. The voltage collection part is electrically connected to the bus, and the temperature collection part contacts the first wall surface. The voltage collection part is embedded in the second notch, and the first notch is connected to the second notch.

6. The battery pack according to claim 4, characterized in that: The electrical isolation plate further includes a first positioning column extending along the third direction, the first positioning column is assembled in the assembly groove, the busbar has a first positioning hole, and the first positioning column is passed through the first positioning hole along the third direction.

7. The battery pack according to any one of claims 1 to 3, characterized in that: The first wall surface has a window area, and the first connecting portion, the second connecting portion and the base portion form a window for the structural adhesive to pass through, and the window is connected to the window area.

8. The battery pack according to any one of claims 1 to 3, characterized in that: The connecting end includes a connector and a connecting section. The connecting section is connected between the connector and the main body. The connecting section has a plurality of telescopic joints.

9. The battery pack according to any one of claims 1 to 3, characterized in that: It also includes a positioning member, which is assembled on the first wall surface. The positioning member has positioning grooves at both ends along the second direction, and the positioning grooves are for the poles to be embedded. The positioning member also has a second positioning column, and the base has a second positioning hole. The second positioning column is embedded in the second positioning hole along the third direction.

10. An electrical device, characterized in that: A battery pack comprising any one of claims 1 to 9.

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