Battery pack and electric device

Abstract

The utility model provides a battery pack. The battery pack comprises a battery assembly, a PCM assembly, a waterproof insulation assembly and a heat-shrinkable sleeve. The battery assembly and the PCM assembly are both arranged in a battery containing groove of the heat-shrinkable sleeve, the waterproof insulation assembly comprises a first waterproof insulator assembly and a second waterproof insulator assembly which are bonded to the two ends and the side face of the heat-shrinkable sleeve respectively, and a first battery cell waterproof insulation sheet is provided with a transmission line groove for a wire to penetrate through. The structure has the remarkable advantages that the waterproof insulation assembly made of the PET material is adopted to replace a traditional gluing process, the production process is simplified, the production period is shortened, and the production efficiency is improved. Meanwhile, the PET waterproof insulation assembly has good waterproof performance, the position and compactness can be accurately controlled in the bonding process, the risk of waterproof failure is effectively reduced, and the reliability and stability of the waterproof structure of the heat-shrinkable sleeve are ensured.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery insulation protection, and in particular to a battery pack and an electrical device. Background Art

[0002] New energy lithium-ion battery technology has made significant progress and is widely used in a variety of rechargeable products. To meet the requirements of specific application environments, such as the IPX5 waterproof rating required for sweeper batteries, the existing battery waterproof structure first completes the assembly process by resistance welding the battery cell and nickel sheet, and then blows on the blue heat shrink tubing. However, since the heat shrink tubing has open ends, it cannot meet the waterproof requirements. Therefore, the tubing must be directly sealed with glue at both ends to achieve waterproofing.

[0003] However, existing technologies still have many shortcomings. For example, after the glue is applied, the glue can flow during battery transportation or placement in a drying room, resulting in inconsistent appearance of the finished battery and affecting the overall aesthetics of the product. Furthermore, in battery compartments with limited space, the glue height needs to be strictly controlled, which not only increases the difficulty of the process, but also the glue application process itself relies on manual or machine control, which can lead to inadequate glue application and waterproofing failure. Utility Model Content

[0004] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a controllable battery pack and an electrical device that meet IPX waterproof requirements.

[0005] The purpose of this disclosure is achieved through the following technical solutions:

[0006] A battery pack includes a battery assembly, a PCM assembly, and a heat shrink tubing. The PCM assembly includes a wire and a circuit board. The wire is welded to the circuit board. The circuit board is connected to the battery assembly. A battery receiving slot is defined in the heat shrink tubing. The battery assembly and the PCM assembly are both disposed in the battery receiving slot.

[0007] The battery pack also includes a waterproof insulation assembly, which includes a first waterproof insulator assembly and a second waterproof insulator assembly. The first waterproof insulator assembly and the second waterproof insulator assembly are respectively arranged at the two ports of the heat shrinkable sleeve. The first waterproof insulator assembly and the second waterproof insulator assembly are also respectively bonded to the two ends of the heat shrinkable sleeve to seal the two ports of the heat shrinkable sleeve.

[0008] In one embodiment, the first waterproof insulator assembly includes a first battery cell waterproof insulating sheet and a first waterproof insulating adhesive sheet, the first waterproof insulating adhesive sheet is connected to the first battery cell waterproof insulating sheet, the second waterproof insulator assembly includes a second battery cell waterproof insulating sheet and a second waterproof insulating adhesive sheet, the second waterproof insulating adhesive sheet is connected to the second battery cell waterproof insulating sheet, the first battery cell waterproof insulating sheet and the second battery cell waterproof insulating sheet are respectively covered on a short side end face of the heat shrinkable sleeve, and the first waterproof insulating adhesive sheet and the second waterproof insulating adhesive sheet are respectively abutted against a long side side face of the heat shrinkable sleeve.

[0009] In one embodiment, the first waterproof insulating adhesive sheet and the second waterproof insulating adhesive sheet respectively surround and abut against the outer wall of the end portion of the heat shrinkable sleeve.

[0010] In one embodiment, there are a plurality of the first waterproof insulating adhesive sheet and the second waterproof insulating adhesive sheet, and each of the first waterproof insulating adhesive sheet and each of the second waterproof insulating adhesive sheet abuts against a long side of the heat shrinkable sleeve.

[0011] In one embodiment, the first battery cell waterproof insulating sheet is provided with a transmission line groove, the first waterproof insulating adhesive sheet is provided with an air avoidance groove, the air avoidance groove is connected to the transmission line groove, and the wire is passed through the transmission line groove.

[0012] In one embodiment, the first battery cell waterproof insulating sheet and the second battery cell waterproof insulating sheet have adhesive backing on one side adjacent to the heat shrinkable sleeve, and the adhesive backing is used to respectively adhere the first battery cell waterproof insulating sheet and the second battery cell waterproof insulating sheet to a short side end face of the heat shrinkable sleeve.

[0013] In one embodiment, the first waterproof insulating adhesive sheet and the second waterproof insulating adhesive sheet have adhesive backing on one side adjacent to the heat shrinkable tube, and the adhesive backing is used to respectively adhere the first waterproof insulating adhesive sheet and the second waterproof insulating adhesive sheet to the long side of the heat shrinkable tube.

[0014] In one embodiment, the battery assembly includes a battery cell and a conductive member, the conductive member includes a battery conductive sheet and a PCB conductive sheet, the PCB conductive sheet is connected to the battery conductive sheet, the battery conductive sheet abuts against the end of the battery cell, the PCB conductive sheet is arranged adjacent to the side of the battery cell, and the circuit board is connected to the PCB conductive sheet.

[0015] In one embodiment, the PCM assembly further includes an electrical connection member connected to the PCB conductive sheet.

[0016] An electrical device comprises a heat shrink tubing battery pack as described in any one of the above items.

[0017] Compared with the prior art, the present disclosure has at least the following advantages:

[0018] 1. In the above-mentioned battery pack, since the waterproof insulating component is made of PET material and has adhesive backing on the side adjacent to the heat shrink tube, the process of bonding the waterproof insulating component to the heat shrink tube is simple and easy to operate, replacing the traditional waterproof glue application process, reducing the process of waiting for the waterproof glue to dry, thereby shortening the production cycle and improving the production efficiency of the battery pack; further, since the waterproof insulating component has good waterproof performance and the fit between the waterproof insulating component and the heat shrink tube can be controlled during the bonding process, the problem of waterproof failure caused by insufficient glue application can be avoided, thereby improving the stability of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 is a schematic structural diagram of a battery pack according to an embodiment;

[0021] Figure 2 for Figure 1 A partial exploded view of the battery pack is shown. DETAILED DESCRIPTION

[0022] To facilitate understanding of the present disclosure, a more comprehensive description of the present disclosure will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present disclosure. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. The terms used herein in the specification of this disclosure are intended only to describe specific embodiments and are not intended to limit this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] In order to better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure is further described in detail below with reference to specific embodiments:

[0026] like Figure 1 and Figure 2 As shown, a battery pack 10 according to an embodiment of the present disclosure includes a battery assembly 100, a PCM assembly 200 and a heat shrink tubing 300. The PCM assembly 200 includes a wire 210 and a circuit board 220. The wire 210 is welded to the circuit board 220. The circuit board 220 is connected to the battery assembly 100. A battery receiving groove 3001 is provided in the heat shrink tubing 300. Both the battery assembly 100 and the PCM assembly 200 are arranged in the battery receiving groove.

[0027] Furthermore, the battery pack 10 also includes a waterproof insulation assembly 400, which includes a first waterproof insulator assembly 410 and a second waterproof insulator assembly 420. The first waterproof insulator assembly 410 and the second waterproof insulator assembly 420 are respectively disposed at the two ends of the heat shrinkable tube 300. The first waterproof insulator assembly 410 and the second waterproof insulator assembly 420 are also bonded to the ends of the heat shrinkable tube 300 to seal the two ends of the heat shrinkable tube 300. The insulation assembly 400 is made of PET material to ensure sufficient waterproof and insulating properties.

[0028] In this embodiment, during the assembly process of the battery pack 10, the circuit board 220 is first fixedly connected to the battery assembly 100, and then a suitable heat shrink tubing 300 is cut according to the length dimensions of the battery assembly 100 and the circuit board 220, and it is ensured that the length of the heat shrink tubing 300 is sufficient to cover the circuit board 220 and the battery assembly 100, and an appropriate length is retained for the subsequent process of fixing the heat shrink tubing 300, and then a hot air gun or a heat shrink machine is used to blow and shrink the heat shrink tubing 300 so that it is tightly wrapped around the battery assembly 100 and the PCM assembly 200, and then the first waterproof insulator assembly 410 and the second waterproof insulator assembly 420 are respectively bonded to the two end faces of the heat shrink tubing 300, so that the battery assembly 100, the PCM assembly 200, the waterproof insulation assembly 400 and the heat shrink tubing 300 are assembled into a whole. On the other hand, since the waterproof insulating component 400 is a PET insulating sheet made of PET material, and the PET insulating sheet has good waterproof and insulating properties, the position and tightness of the waterproof insulating component 400 can be controlled during the process of bonding it to the heat shrinkable sleeve 300, so that the waterproof insulating component 400 and the heat shrinkable sleeve 300 form a closed waterproof structure, so that the battery pack 10 can meet the IPX5 waterproof requirements.

[0029] The above-mentioned battery pack 10, since the waterproof insulating component 400 is made of PET material and has a backing adhesive on the side adjacent to the heat shrinkable tube 300, the process of bonding the waterproof insulating component 400 to the heat shrinkable tube 300 is simple and easy to operate, replacing the traditional waterproof glue application process, reducing the process of waiting for the waterproof glue to dry, thereby shortening the production cycle and improving the production efficiency of the battery pack 10; further, since the waterproof insulating component 400 has good waterproof performance and the degree of fit between the waterproof insulating component 400 and the heat shrinkable tube 300 can be controlled during the process of bonding it to the heat shrinkable tube 300, the problem of waterproof failure caused by insufficient glue application can be avoided, thereby improving the stability of the battery pack 10.

[0030] like Figure 2As shown, in one embodiment, the first waterproof insulator assembly 410 includes a first battery cell waterproof insulating sheet 411 and a first waterproof insulating adhesive sheet 412, the first waterproof insulating adhesive sheet 412 is connected to the first battery cell waterproof insulating sheet 411, the second waterproof insulator assembly 420 includes a second battery cell waterproof insulating sheet 421 and a second waterproof insulating adhesive sheet 422, the second waterproof insulating adhesive sheet 422 is connected to the second battery cell waterproof insulating sheet 421, the first battery cell waterproof insulating sheet 411 and the second battery cell waterproof insulating sheet 421 are respectively covered on a short side end face of the heat shrinkable sleeve, and the first waterproof insulating adhesive sheet 412 and the second waterproof insulating adhesive sheet 422 are respectively abutted against a long side side of the heat shrinkable sleeve. In this embodiment, the first waterproof insulating adhesive sheet 412 and the second waterproof insulating adhesive sheet 422 enhance their contact tightness with the side of the heat shrinkable tube, and because the first waterproof insulating adhesive sheet 412 and the second waterproof insulating adhesive sheet 422 form a snap structure, when subjected to external force, the first waterproof insulating adhesive sheet 412 and the second waterproof insulating adhesive sheet 422 can be firmly maintained in the predetermined position without displacement or falling off, thereby improving the stability and reliability of the battery pack 10; and the snap portion forms a tight fit with the surface of the heat shrinkable tube, effectively preventing moisture from penetrating into the heat shrinkable tube 300 from the side, further improving the waterproof performance of the battery pack 10.

[0031] like Figure 2 As shown, in one embodiment, the first waterproof insulating adhesive sheet 412 and the second waterproof insulating adhesive sheet 422 respectively surround and abut the outer wall of the end of the heat shrinkable tube 300. In this embodiment, because the first waterproof insulating adhesive sheet 412 is connected to the first battery cell waterproof insulating sheet 411, the first waterproof insulating adhesive sheet 422 is connected to the first battery cell waterproof insulating sheet 421, and the first waterproof insulating adhesive sheet 412 and the second waterproof insulating adhesive sheet 422 respectively surround and abut the outer wall of the end of the heat shrinkable tube 300, the first waterproof insulator assembly 410 and the second waterproof insulator assembly 420 can form a tight connection with the end of the heat shrinkable tube 300, avoiding the problem of waterproof failure caused by gaps between the first waterproof insulator assembly 410 and the second waterproof insulator assembly 420 and the heat shrinkable tube 300, thereby improving the waterproof performance of the battery pack 10.

[0032] like Figure 2As shown, in one embodiment, there are multiple first waterproof insulating adhesive sheets 412 and multiple second waterproof insulating adhesive sheets 422, each of which abuts against a long side of the heat shrinkable tube 300. In this embodiment, because multiple first waterproof insulating adhesive sheets 412 and multiple second waterproof insulating adhesive sheets 422 abut against the long side of the heat shrinkable tube 300, the connection strength between the first waterproof insulating adhesive sheets 412 and the second waterproof insulating adhesive sheets 422 and the heat shrinkable tube 300 is increased, preventing gaps from forming between the first waterproof insulating adhesive sheets 412 and the second waterproof insulating adhesive sheets 422 and the heat shrinkable tube 300, thereby ensuring that the waterproof insulation assembly 400 and the heat shrinkable tube 300 form a tight waterproof structure, thereby improving the waterproof performance of the battery pack 10.

[0033] like Figure 2 As shown, in one embodiment, the first cell waterproof insulating sheet 411 is provided with a transmission line slot 4101, and the first waterproof insulating adhesive sheet 412 is provided with an air avoidance slot 4102. The air avoidance slot 4102 is connected to the transmission line slot 4101, and the wire 210 is passed through the transmission line slot 4101. In this embodiment, during the assembly process of the battery pack 10, since the air avoidance slot 4102 is connected to the transmission line slot 4101, it is convenient for the wire 210 to pass through the transmission line slot 4101, and the wire 210 is prevented from interfering with the first rectangular insulating sheet 312 in space, thereby improving the assembly effect of the battery pack 10 and further improving the production efficiency of the battery pack 10.

[0034] like Figure 2 As shown, in one embodiment, the first cell waterproof insulating sheet 411 and the second cell waterproof insulating sheet 421 have adhesive on one side adjacent to the heat shrink tubing 300. The adhesive is used to adhere the first cell waterproof insulating sheet 411 and the second cell waterproof insulating sheet 421 to a short side end face of the heat shrink tubing 300. In this embodiment, during the bonding of the first cell waterproof insulating sheet 411 and the second cell waterproof insulating sheet 421 to the heat shrink tubing 300, the adhesive replaces the traditional waterproof adhesive, simplifying the production process and avoiding the problem of uneven gluing by manual or machine application. This ensures the consistency of the appearance of the battery pack 10 and improves the aesthetics of the product. Furthermore, the use of adhesive saves space within the battery pack 10, making the battery pack 10 more refined and facilitating its installation in devices of various sizes, thereby enhancing the applicability of the battery pack 10.

[0035] like Figure 2As shown, in one embodiment, the first waterproof insulating adhesive sheet 412 and the second waterproof insulating adhesive sheet 422 have adhesive backing on the side adjacent to the heat shrinkable tube 300. The adhesive backing is used to adhere the first waterproof insulating adhesive sheet 412 and the second waterproof insulating adhesive sheet 422 to the long side of the heat shrinkable tube 300. In this embodiment, during the bonding of the waterproof insulating assembly 400 to the heat shrinkable tube 300, the adhesive backing on the side adjacent to the heat shrinkable tube 300 of the first waterproof insulating adhesive sheet 412 and the second waterproof insulating adhesive sheet 422 reduces the use of glue, eliminating the need to wait for the glue to dry during production, thereby shortening the production cycle. Furthermore, the first waterproof insulating adhesive sheet 412 and the second waterproof insulating adhesive sheet 422 are respectively connected to the first cell waterproof insulating sheet 411 and the second cell waterproof insulating sheet 421, thereby increasing the tightness of the connection between the waterproof insulating assembly 400 and the heat shrinkable tube 300, thereby improving the waterproof performance of the battery pack 10.

[0036] like Figure 2 As shown, in one embodiment, a battery assembly 100 includes a battery cell 110 and a conductive member 120. The conductive member 120 includes a battery conductive sheet 121 and a PCB conductive sheet 122. The PCB conductive sheet 122 is connected to the battery conductive sheet 121, which abuts the end of the battery cell 110. The PCB conductive sheet 122 is disposed adjacent to the side of the battery cell 110. The circuit board 220 is connected to the PCB conductive sheet 122. In this embodiment, the battery conductive sheet 121 is connected to the positive and negative poles of the battery cell 110 within the battery assembly 100, allowing the battery assembly 100 to release electrical energy. At the same time, the PCB conductive sheet 122 connected to the battery conductive sheet 121 conducts electrical energy to the circuit board 220, allowing the circuit board 220 to operate normally. Since the circuit board 220 also integrates safety circuits such as overcurrent protection and overvoltage protection, the safe operation of the battery assembly 100 is further ensured, thereby improving the stability of the battery assembly 100.

[0037] like Figure 2 As shown, in one embodiment, the PCM assembly 200 further includes an electrical connector 230, which is connected to the PCB conductive sheet 122. In this embodiment, the electrical connector 230 is used to conduct electrical energy from the battery assembly 100 to the circuit board 220, allowing the circuit board 220 to obtain electrical energy and thus enable the circuit board 220 to operate normally and stably. Since the circuit board 220 also integrates circuits such as overcurrent protection and short-circuit protection, the normal operation of the circuit board 220 ensures that the battery assembly 100 is protected from damage in abnormal situations, thereby further ensuring the stable operation of the battery assembly 100 and improving the stability of the battery assembly 100.

[0038] An electrical device includes any one of the battery packs 10 described above. In this embodiment, during the assembly process of the battery pack 10, the circuit board 220 is first fixedly connected to the battery assembly 100, and then a suitable heat shrink tubing 300 is cut according to the length of the battery assembly 100 and the circuit board 220, and it is ensured that the length of the heat shrink tubing 300 is sufficient to cover the circuit board 220 and the battery assembly 100, and an appropriate length is retained for the subsequent process of fixing the heat shrink tubing 300. Then, a hot air gun or a heat shrink machine is used to shrink the heat shrink tubing 300 so that it is tightly covered on the battery assembly 100 and the PCM assembly 200, and then the first waterproof insulator assembly 410 and the second waterproof insulator assembly 420 are respectively bonded to the two end faces of the heat shrink tubing 300, so that the battery assembly 100, the PCM assembly 200, the waterproof insulation assembly 400 and the heat shrink tubing 300 are assembled into a whole. On the other hand, since the waterproof insulating component 400 is a PET insulating sheet made of PET material, and the PET insulating sheet has good waterproof and insulating properties, the position and tightness of the waterproof insulating component 400 can be controlled during the process of bonding it to the heat shrinkable sleeve 300, so that the waterproof insulating component 400 and the heat shrinkable sleeve 300 form a closed waterproof structure, so that the battery pack 10 can meet the IPX5 waterproof requirements.

[0039] Compared with the prior art, the present disclosure has at least the following advantages:

[0040] 1. In the above-mentioned battery pack 10, since the waterproof insulating component 400 is made of PET material and has a backing adhesive on the side adjacent to the heat shrink tube 300, the process of bonding the waterproof insulating component 400 to the heat shrink tube 300 is simple and easy to operate, replacing the traditional waterproof glue application process, reducing the process of waiting for the waterproof glue to dry, thereby shortening the production cycle and improving the production efficiency of the battery pack 10; further, since the waterproof insulating component 400 has good waterproof performance and the fit between the waterproof insulating component 400 and the heat shrink tube 300 can be controlled during the process of bonding it to the heat shrink tube 300, the problem of waterproof failure caused by insufficient glue application can be avoided, thereby improving the stability of the battery pack 10.

[0041] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the scope of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the disclosed patent shall be determined by the appended claims.

Claims

1. A battery pack comprising a battery assembly, a PCM assembly, and a heat shrink tubing, wherein the PCM assembly comprises a wire and a circuit board, the wire being soldered to the circuit board, the circuit board being connected to the battery assembly, the heat shrink tubing defining a battery receiving slot, the battery assembly and the PCM assembly being disposed within the battery receiving slot, characterized in that: The battery pack also includes a waterproof insulation assembly, which includes a first waterproof insulator assembly and a second waterproof insulator assembly. The first waterproof insulator assembly and the second waterproof insulator assembly are respectively arranged at the two ports of the heat shrinkable sleeve. The first waterproof insulator assembly and the second waterproof insulator assembly are also respectively bonded to the two ends of the heat shrinkable sleeve to seal the two ports of the heat shrinkable sleeve.

2. The battery pack according to claim 1, wherein: The first waterproof insulator assembly includes a first battery cell waterproof insulating sheet and a first waterproof insulating adhesive sheet, the first waterproof insulating adhesive sheet is connected to the first battery cell waterproof insulating sheet, the second waterproof insulator assembly includes a second battery cell waterproof insulating sheet and a second waterproof insulating adhesive sheet, the second waterproof insulating adhesive sheet is connected to the second battery cell waterproof insulating sheet, the first battery cell waterproof insulating sheet and the second battery cell waterproof insulating sheet are respectively covered on a short side end face of the heat shrinkable sleeve, and the first waterproof insulating adhesive sheet and the second waterproof insulating adhesive sheet are respectively abutted against a long side side face of the heat shrinkable sleeve.

3. The battery pack according to claim 2, wherein: The first waterproof insulating adhesive sheet and the second waterproof insulating adhesive sheet respectively surround and abut against the outer wall of the end portion of the heat shrinkable sleeve.

4. The battery pack according to claim 3, wherein: There are a plurality of the first waterproof insulating adhesive sheets and the second waterproof insulating adhesive sheets, and each of the first waterproof insulating adhesive sheets and each of the second waterproof insulating adhesive sheets is respectively in contact with a long side surface of the heat shrinkable sleeve.

5. The battery pack according to claim 2, wherein: The first battery cell waterproof insulating sheet is provided with a transmission line slot, the first waterproof insulating adhesive sheet is provided with an air avoidance slot, the air avoidance slot is connected to the transmission line slot, and the wire is passed through the transmission line slot.

6. The battery pack according to claim 2, characterized in that: The first cell waterproof insulating sheet and the second cell waterproof insulating sheet have adhesive backing on one side adjacent to the heat shrinkable sleeve, and the adhesive backing is used to respectively adhere the first cell waterproof insulating sheet and the second cell waterproof insulating sheet to a short side end face of the heat shrinkable sleeve.

7. The battery pack according to claim 6, characterized in that: The first waterproof insulating adhesive sheet and the second waterproof insulating adhesive sheet have adhesive backing on one side adjacent to the heat shrinkable sleeve, and the adhesive backing is used to adhere the first waterproof insulating adhesive sheet and the second waterproof insulating adhesive sheet to the long side of the heat shrinkable sleeve respectively.

8. The battery pack according to claim 1, wherein: The battery assembly includes a battery cell and a conductive part, the conductive part includes a battery conductive sheet and a PCB conductive sheet, the PCB conductive sheet is connected to the battery conductive sheet, the battery conductive sheet abuts the end of the battery cell, the PCB conductive sheet is arranged adjacent to the side of the battery cell, and the circuit board is connected to the PCB conductive sheet.

9. The battery pack according to claim 8, characterized in that: The PCM assembly further includes an electrical connection piece connected to the PCB conductive sheet.

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

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