Battery pack and powered device

Abstract

Embodiments of the present disclosure provide a battery pack and an electric device. The battery pack includes a box body, a cover body, a plurality of battery cells, an insulation member, a protection member, and an electrical connection member. The box body includes a top opening. The cover body is disposed at the top opening and detachably connected to the box body. The plurality of battery cells are disposed in the box body. Each of the plurality of battery cells includes an electrode and an explosion-proof valve. The electrode and the explosion-proof valve are disposed at a same side wall of the battery cell. The insulation member is arranged at a side of the plurality of battery cells where the electrodes are disposed. The insulation member includes a body portion and a protruding portion. The body portion includes a first region and a second region. The first region covers the explosion-proof valves of the plurality of battery cells. The protruding portion is protrudingly disposed at a side of the body portion away from the plurality of battery cells. The protruding portion can separate the first region and the second region. The protection member is connected to a side of the insulation member away from the plurality of battery cells. The protection member abuts against the protruding portion. The electrical connection member is disposed between the second region and the protection member. The electrical connection member is electrically connected to the electrodes of the plurality of battery cells.

Description

Technical Field

[0001] The embodiments of this disclosure generally relate to the field of electrical equipment, and more particularly to a battery pack and electrical appliances. Background Technology

[0002] A power battery system typically includes battery cells, metal connectors for electrical connections between cells, and voltage and temperature monitoring components. These components ensure the efficient operation and safety of the battery pack. In some conventional battery packs, thermal runaway may occur due to external environmental factors, system control module malfunctions, and factors inherent to the battery cells themselves. Once thermal runaway occurs, the battery cell may eject material. This ejected material may contain conductive components; if these components come into contact with high-voltage components within the battery pack, it can lead to insulation failure, further increasing safety hazards. Utility Model Content

[0003] In a first aspect of this disclosure, a battery pack is provided. The battery pack includes: a housing having a top opening; a cover disposed at the top opening and detachably connected to the housing; a plurality of battery cells disposed within the housing, each including an electrode and an explosion-proof valve, the electrode and the explosion-proof valve being spaced apart on the same sidewall of the battery cells; an insulating member disposed on the side of the plurality of battery cells where the electrode is disposed, the insulating member including a body portion and a protrusion, the body portion including a first region and a second region, the first region covering the explosion-proof valve of the plurality of battery cells, the protrusion protruding from the side of the body portion opposite to the plurality of battery cells and separating the first region and the second region; a protective member connected to the side of the insulating member opposite to the plurality of battery cells and abutting against the protrusion to cover the second region and at least partially expose the first region; and an electrical connector disposed between the second region and the protective member and electrically connected to the electrodes of the plurality of battery cells.

[0004] In some embodiments, the second region includes a plurality of first grooves disposed on the side of the body portion away from the plurality of cells, and the plurality of first grooves respectively correspond to two adjacent cells among the plurality of cells. The electrical connector includes a plurality of electrode connection portions, each disposed in a corresponding first groove, and electrically connected to the positive electrode of one of the two adjacent cells and the negative electrode of the other of the two adjacent cells.

[0005] In some embodiments, the second region further includes a second groove and a plurality of first notches. The second groove is disposed along the peripheral edge of the protrusion on the side of the body portion opposite to the plurality of battery cells. The plurality of first grooves are spaced apart from the second groove. The plurality of first grooves and the second groove are connected through the plurality of first notches. The electrical connector further includes: a flexible circuit board, at least partially disposed in the second groove; and a plurality of voltage sampling components, each at least partially disposed in a corresponding first notch, and the two ends of the voltage sampling components are respectively electrically connected to the flexible circuit board and a corresponding electrode connection portion.

[0006] In some embodiments, the second region further includes a pair of through holes disposed at the bottom of a plurality of first grooves, wherein the positive electrode of one of two adjacent cells and the negative electrode of the other of two adjacent cells are respectively disposed at the corresponding through holes in the pair of through holes.

[0007] In some embodiments, the second region further includes a first limiting portion disposed within a plurality of first grooves, and each of the plurality of electrode connection portions includes a second limiting portion, wherein the first limiting portion and the second limiting portion cooperate to limit the electrode connection portion.

[0008] In some embodiments, each of the plurality of electrode connection portions further includes a recess disposed on the side facing the protective member, and the recess corresponds to the first notch, and the voltage sampling component is electrically connected to the electrode connection portion at the recess.

[0009] In some embodiments, the protective member includes a second notch corresponding to the first region, and a protrusion abuts against the protective member along the edge of the second notch to expose the first region.

[0010] In some embodiments, a plurality of battery cells are arranged in multiple rows, the body includes a plurality of first regions and a plurality of second regions, each of the plurality of first regions covering the explosion-proof valve of the battery cell in the corresponding row, and the protective member includes: a plurality of sub-protective members, each corresponding to the battery cell in the corresponding row, the plurality of sub-protective members respectively covering the corresponding second region in the plurality of second regions and at least partially exposing the corresponding first region.

[0011] In some embodiments, the protrusion is U-shaped and has an opening at the edge of the body portion, and a second groove is continuously disposed on the body portion around the outer periphery of the protrusion.

[0012] In a second aspect of this disclosure, an electrical appliance is provided. The electrical appliance includes a battery pack according to the first aspect of this disclosure.

[0013] In embodiments of this disclosure, the battery pack includes a housing, a cover, multiple battery cells, an insulator, a protective element, and an electrical connector. The housing includes a top opening. The cover is disposed at the top opening and detachably connected to the housing. Multiple battery cells are disposed within the housing. Each battery cell includes an electrode and an explosion-proof valve. The electrode and explosion-proof valve are spaced apart on the same sidewall of the battery cell. An insulator is disposed on the side of the multiple battery cells where the electrode is located. The insulator includes a body portion and a protrusion. The body portion includes a first region and a second region. The first region covers the explosion-proof valve of the multiple battery cells. The protrusion protrudes from the body portion on the side of the body portion opposite to the multiple battery cells. The protrusion can separate the first region and the second region. The protective element is connected to the side of the insulator opposite to the multiple battery cells. The protective element abuts against the protrusion. The protective element can cover the second region and at least partially expose the first region. An electrical connector is disposed between the second region and the protective element. The electrical connector is electrically connected to the electrodes of the multiple battery cells. With this arrangement, in the event of thermal runaway in the battery cell, the conductive material ejected from the cell will enter the first region. The second region of the body, the protrusion, and the protective member surround the electrical connector, which can prevent the ejected conductive material from entering the second region, thereby preventing the ejected conductive material from contacting the electrical connector between the second region and the protective member, which helps to improve the safety of the battery pack.

[0014] It should be understood that the content described in this section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0015] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0016] Figure 1 A perspective view of a battery pack according to some embodiments of the present disclosure is shown;

[0017] Figure 2 A top view of several cells and frames according to some embodiments of the present disclosure is shown, wherein the cells include electrodes and explosion-proof valves;

[0018] Figure 3 A cross-sectional view of a battery pack according to some embodiments of the present disclosure is shown, in which an explosion-proof valve and electrodes are shown;

[0019] Figure 4 A perspective view of an insulating member and a protective member according to some embodiments of the present disclosure is shown;

[0020] Figure 5A top view of an insulating element, electrode connection, and flexible circuit board according to some embodiments of the present disclosure is shown; and

[0021] Figure 6 Disassembly diagrams of insulation components, electrical connections, and protective components according to some embodiments of the present disclosure are shown.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10. Insulating component; 100. Body portion; 101. First region; 102. Second region; 103. Protrusion; 1030. Opening; 11. First groove; 12. Second groove; 13. First notch; 14. Through hole; 15. First limiting portion;

[0024] 20. Protective component; 21. Second gap;

[0025] 30. Electrical connector; 31. Electrode connection part; 310. Recessed part; 311. Second limiting part; 32. Flexible circuit board; 33. Voltage sampling component;

[0026] 400, Battery Pack;

[0027] 410. Framework;

[0028] 420. Battery cell; 421. Electrode; 422. Explosion-proof valve;

[0029] 510. Box body; 511. Top opening; 520. Cover. Detailed Implementation

[0030] Embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0031] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects.

[0032] As mentioned above, in some conventional battery packs, thermal runaway may occur in the battery cells due to external operating environment, system control module malfunctions, and factors inherent to the cells themselves. Once thermal runaway occurs, the ejected material from the cell may contain conductive components. If these conductive components come into contact with high-voltage components within the battery pack, it may lead to insulation failure, further increasing safety hazards.

[0033] This disclosure provides a battery pack. The battery pack includes a housing, a cover, multiple battery cells, an insulator, a protective element, and an electrical connector. The housing includes a top opening. The cover is disposed at the top opening and detachably connected to the housing. Multiple battery cells are disposed within the housing. Each battery cell includes an electrode and an explosion-proof valve. The electrode and explosion-proof valve are spaced apart on the same sidewall of the battery cell. An insulator is disposed on the side of the multiple battery cells where the electrode is located. The insulator includes a body portion and a protrusion. The body portion includes a first region and a second region. The first region covers the explosion-proof valve of the multiple battery cells. The protrusion protrudes from the body portion on the side of the body portion opposite to the multiple battery cells. The protrusion can separate the first region and the second region. The protective element is connected to the side of the insulator opposite to the multiple battery cells. The protective element abuts against the protrusion. The protective element can cover the second region and at least partially expose the first region. An electrical connector is disposed between the second region and the protective element. The electrical connector is electrically connected to the electrodes of the multiple battery cells. Using this arrangement, in the event of thermal runaway within the battery cell, the conductive material ejected from the cell will enter the first region. The second region of the body, the protrusion, and the protective component surround the electrical connector, preventing the ejected conductive material from entering the second region. This avoids the ejected conductive material contacting the electrical connector between the second region and the protective component, thus contributing to improved battery pack safety. The following will combine... Figures 1 to 6 The principles of this disclosure will be described in detail below.

[0034] like Figures 1 to 5As shown, the battery pack 400 includes a housing 510, a cover 520, multiple battery cells 420, an insulator 10, a protective element 20, and an electrical connector 30. The housing 510 has a top opening 511. The cover 520 is disposed at the top opening 511 and is detachably connected to the housing 510. Multiple battery cells 420 are arranged inside the housing 510. As an example, the housing 510 can be made of aluminum alloy or engineering plastic, and the housing 510 needs to balance high strength and good heat dissipation. The cover 520 can be connected to the housing 510 by bolts or clips. In some embodiments, a sealing ring is provided between the housing 510 and the cover 520 to achieve waterproofing, dustproofing, and other effects, thereby protecting the internal components. The battery cell 420 is an energy storage unit within the battery pack 400. In some embodiments, the battery cell 420 can be a cylindrical cell 420, a square cell 420, or a pouch cell 420, etc. Each of the multiple battery cells 420 includes an electrode 421 and an explosion-proof valve 422. The electrode 421 and the explosion-proof valve 422 are spaced apart on the same side wall of the battery cell 420. The electrode 421 includes a positive electrode and a negative electrode. When the battery cell 420 experiences thermal runaway due to external environmental influences or a short circuit in its own circuit, the explosion-proof valve 422 can be used to release overpressured gas to prevent an explosion.

[0035] like Figure 2 As shown, to increase the arrangement density, multiple battery cells 420 can be arranged side by side, for example, in a rectangular or matrix configuration, thereby improving the space utilization of the battery pack 400. In some embodiments, the positive and negative electrodes of two adjacent battery cells 420 are arranged in opposite directions. Having the positive electrode of one adjacent battery cell 420 close to the negative electrode of the other adjacent battery cell 420 can shorten the length of electrical connectors in the circuit, thereby simplifying wiring length.

[0036] In some embodiments, such as Figure 2 As shown, the explosion-proof valves 422 of multiple battery cells 420 are arranged in a row. In this way, it is convenient to manage the conductive material ejected in case of thermal runaway, thereby reducing damage to other components.

[0037] like Figures 1 to 3 As shown, the insulating element 10 is arranged on one side (typically the top) of the plurality of battery cells 420 where the electrodes 421 are located. The insulating element 10 can cover the electrodes 421 and the explosion-proof valve 422 of the plurality of battery cells 420, thereby improving electrical safety.

[0038] like Figure 4 and Figure 5As shown, the insulating member 10 includes a body portion 100 and a protrusion 103. The body portion 100 includes a first region 101 and a second region 102. The first region 101 can cover a row of explosion-proof valves 422 of multiple battery cells 420. When a battery cell 420 experiences thermal runaway due to external environmental impact or a short circuit, the conductive material ejected from the explosion-proof valve 422 can flow into the first region 101. When the temperature of the ejected conductive material is high, the conductive material can also burn through the first region 101 of the insulating member 10, thereby being discharged along the first region 101. The protrusion 103 protrudes from the side of the body portion 100 opposite to the multiple battery cells 420. The protrusion 103 is a continuous protrusion that can separate the first region 101 and the second region 102, thereby preventing the spread of the ejected conductive material.

[0039] like Figures 4 to 6 As shown, the protective member 20 is connected to the side of the insulating member 10 facing away from the cell 420 and abuts against the protrusion 103. The protective member 20 may cover the second region 102 and at least partially expose the first region 101. As an example, the protective member 20 may be fixed to the insulating member 10 by means of adhesive, bolts or compression, thereby maintaining stability under high temperature or vibration.

[0040] like Figures 4 to 6 As shown, the electrical connector 30 is disposed between the second region 102 of the insulating member 10 and the protective member 20. The electrical connector 30 can be connected to the electrode 421 of the battery cell 420 by means of spot welding, laser welding or crimping, to achieve series or parallel connection. As an example, the electrical connector 30 can be one of a nickel sheet, a copper busbar or an aluminum busbar.

[0041] With this arrangement, in the event of thermal runaway in the cell 420, the conductive material ejected from the cell 420 will enter the first region 101. The second region 102, the protrusion 103, and the protective member 20 surround the electrical connector 30, which can prevent the ejected conductive material from entering the second region 102, thereby preventing the ejected conductive material from contacting the electrical connector 30 located between the second region 102 and the protective member 20, which helps to improve the safety of the battery pack 400.

[0042] As an example, the insulating element 10 can be manufactured using injection molding (such as polypropylene PP, polycarbonate PC) or thermoforming processes. The protective element 20 can be made of high-temperature resistant materials (such as mica sheets, ceramic tape, or PPS plastic sheets). In some embodiments, the insulating element 10 and the protective element 20 can withstand temperatures of at least 120°C, thereby protecting the internal structure from high-temperature ejecta or external impacts.

[0043] It should be understood that the insulating element 10 and the protective element 20 may also be made of other materials as needed. The insulating element 10 and the protective element 20 may also withstand higher temperatures; 120°C is merely an example value, and this disclosure is not intended to limit specific values.

[0044] In some embodiments, such as Figures 4 to 6 As shown, in the battery pack 400, the second region 102 of the insulator 10 includes a plurality of first grooves 11. The plurality of first grooves 11 are disposed on the side of the insulator 10 opposite to the plurality of battery cells 420. As an example, the first grooves 11 may be shallow groove structures. The first grooves 11 do not penetrate the top and bottom surfaces of the insulator 10.

[0045] like Figure 5 As shown, the plurality of first grooves 11 correspond to two adjacent battery cells 420. Each first groove 11 is correspondingly disposed with the positive electrode of one battery cell 420 and the negative electrode of the other battery cell 420 in the two adjacent battery cells 420. The electrical connector 30 may include a plurality of electrode connection portions 31. Each of the plurality of electrode connection portions 31 is disposed in a corresponding first groove 11. The shape and size of the first groove 11 match the electrode connection portion 31, which can improve the positional stability of the electrode connection portion 31. The electrode connection portion 31 is electrically connected to the positive electrode of one battery cell 420 and the negative electrode of the other battery cell 420 in the two adjacent battery cells 420.

[0046] With this arrangement, when the protective member 20 is fixed together with the insulating member 10, the protective member 20 and the first groove 11 can surround the electrode connection portion 31. In the event of thermal runaway of the battery cell 420, the multiple electrode connection portions 31 can be protected not only by the protrusion 103, but also by the protective member 20 and the corresponding first groove 11, thereby preventing the electrode connection portions 31 from contacting the conductive material ejected from the first region 101, which helps to improve the safety of the electrode connection portions 31.

[0047] In some embodiments, such as Figure 5 and Figure 6As shown, the second region 102 also includes a second groove 12 and a plurality of first notches 13. The second groove 12 is disposed along the outer edge of the protrusion 103 on the side of the insulating member 10 opposite to the plurality of battery cells 420. The plurality of first grooves 11 are spaced apart from the second groove 12. The plurality of first grooves 11 and the second groove 12 are connected via the plurality of first notches 13. The electrical connector 30 also includes a flexible circuit board 32, a plurality of voltage sampling components 33, and a temperature detection component. The flexible circuit board 32 is at least partially disposed within the second groove 12. The plurality of voltage sampling components 33 are each at least partially disposed within a corresponding first notch 13. The two ends of the voltage sampling component 33 are electrically connected to the flexible circuit board 32 and the electrode connection portion 31, respectively. The temperature detection component is electrically connected to the flexible circuit board 32.

[0048] Using this arrangement, the voltage sampling component 33 can acquire the voltage at the electrode 421 of the corresponding cell 420. The temperature detection component can detect the temperature inside the battery pack 400. Temperature and voltage information can be transmitted to an external power management system via the flexible circuit board 32. When the protective member 20 is fixed together with the insulating member 10, the protective member 20 and the second groove 12 can surround the flexible circuit board 32. In the event of thermal runaway in the cell 420, the protrusion 103 can prevent conductive material in the first region 101 from contacting the flexible circuit board 32, the multiple voltage sampling components 33, and the temperature detection component, thereby improving the safety of the voltage and temperature detection assembly.

[0049] In some embodiments, such as Figure 5 and Figure 6 As shown, multiple voltage sampling components 33 are electrically connected to corresponding electrode connection portions 31 in multiple electrode connection portions 31. Using this arrangement, the power management system can determine the voltage value at the electrode 421 of each cell 420, thereby determining the remaining charge and health status of the corresponding cell 420. The segmented voltage sampling structure allows the voltage sampling components 33 to be as small as possible, thus fitting within the recessed structure of the insulating member 10.

[0050] In some embodiments, the flexible circuit board 32 may be a narrow flexible circuit board 32. With this arrangement, the narrow flexible circuit board 32 can bypass the explosion-proof valve 422 in the middle of the multiple cells 420, thereby preventing thermal runaway ejections from damaging the sampling assembly.

[0051] In some embodiments, the temperature detection component may include multiple sub-temperature detection components. The multiple sub-temperature detection components are distributed at different locations within the battery pack 400, thereby providing feedback on the temperature status of the battery cells 420 at different locations within the battery pack 400.

[0052] In some embodiments, such as Figure 5 and Figure 6As shown, the second region 102 also includes paired through holes 14 disposed at the bottom of the plurality of first grooves 11. The positive electrode of one of two adjacent battery cells 420 and the negative electrode of the other adjacent battery cell 420 are respectively inserted into the corresponding through holes 14 of the paired through holes 14. With this arrangement, when the insulating member 10 is placed on the side of the plurality of battery cells 420 where the electrodes 421 are disposed, the positive electrode of one of two adjacent battery cells 420 and the negative electrode of the other adjacent battery cell 420 correspond to the positions of the paired through holes 14. When the electrode connection portion 31 is placed in the first groove 11, the electrode connection portion 31 is electrically connected to the positive electrode of one of two adjacent battery cells 420 and the negative electrode of the other adjacent battery cell 420.

[0053] As an example, such as Figure 2 , Figure 5 and Figure 6 As shown, the size of the through hole 14 matches the size of the electrode 421. When the electrode 421 of the battery cell 420 is inserted into the corresponding through hole 14, the electrode 421 can block the corresponding through hole 14, thereby preventing other substances from contacting the electrode connection portion 31 through the through hole 14. In some embodiments, an interference fit can be used between the electrode 421 of the battery cell 420 and the corresponding through hole 14, thereby improving the safety at the through hole 14.

[0054] In some embodiments, such as Figure 5 and Figure 6 As shown, the second region 102 may further include a first limiting portion 15 disposed within the first groove 11. The electrode connection portion 31 may include a second limiting portion 311. With this arrangement, when the electrode connection portion 31 is placed within the first groove 11, the first limiting portion 15 can cooperate with the second limiting portion 311 to limit the electrode connection portion 31. The cooperation between the first limiting portion 15 and the second limiting portion 311 not only improves the stability of the electrode connection portion 31 and the electrode 421 during assembly, but also improves the stability of the electrode connection portion 31 during use.

[0055] As an example, the first limiting part 15 can be a limiting post or a limiting protrusion, and the second limiting part 311 can be a limiting hole. When the electrode connection part 31 is placed in the first groove 11, the first limiting part 15 can be inserted into the second limiting part 311, thereby limiting the position of the electrode connection part 31.

[0056] As another example, the first limiting part 15 can be a limiting hole, and the second limiting part 311 can be a limiting post or a limiting protrusion. When the electrode connection part 31 is placed in the first groove 11, the second limiting part 311 can be inserted into the first limiting part 15, thereby limiting the position of the electrode connection part 31.

[0057] It should be understood that in other embodiments, the first limiting part 15 and the second limiting part 311 may also be other types of limiting structures, such as limiting grooves and limiting steps, etc., and this disclosure is not intended to limit them.

[0058] In some embodiments, such as Figure 5 and Figure 6 As shown, each of the multiple electrode connection portions 31 also includes a recess 310 disposed on the side facing the protective member 20. The recess 310 corresponds to the first notch 13. The voltage sampling component 33 is electrically connected to the electrode connection portion 31 at the recess 310. With this arrangement, when the protective member 20 is connected to the insulating member 10, the voltage sampling component 33 is placed in the first notch 13 and the recess 310, and the protective member 20 can abut against the protrusion 103, thereby improving the protective performance of the protrusion 103 and the protective member 20. At the same time, the two recessed structures of the first notch 13 and the recess 310 can also reduce the thickness of the insulating member 10, thereby saving the manufacturing cost of the insulating member 10 and reducing the overall size of the battery pack 400.

[0059] In some embodiments, such as Figure 4 and Figure 6 As shown, the protective element 20 includes a second notch 21 corresponding to the first region 101. The protrusion 103 can abut against the protective element 20 along the edge of the second notch 21, thereby exposing the first region 101. With this arrangement, in the event of thermal runaway in the cell 420, the conductive material within the cell 420 can reach the first region 101, then flow out at the second notch 21 and dissipate heat, thereby reducing interference to the electrical connectors 30 within the second region 102.

[0060] In some embodiments, the battery pack 400 may further include a component or container for collecting conductive material. The component or container for collecting conductive material is disposed at the second notch 21. For example, a guide channel for directing the flow of the ejected conductive material. This arrangement allows for the timely elimination of risks posed by conductive material.

[0061] In some embodiments, such as Figure 1 and Figure 2 As shown, the battery pack 400 also includes a frame 410. The frame 410 is connected to multiple battery cells 420. Using this arrangement, the frame 410 can secure the multiple battery cells 420, thereby maintaining the stability of their position and electrical connection during use. Simultaneously, the frame 410 also provides physical protection for the multiple battery cells 420; in the event of an external impact, the frame 410 can absorb some energy and prevent damage to the battery cells 420.

[0062] In some embodiments, such as Figure 2As shown, when there are a large number of battery cells 420, multiple battery cells 420 can be arranged in multiple rows. The body portion 100 may include multiple first regions 101 and multiple second regions 102. Each of the multiple first regions 101 covers the explosion-proof valve 422 of the battery cell 420 in the corresponding row. The protective member 20 may also include multiple sub-protective members. Each of the multiple sub-protective members corresponds to a battery cell 420 in the corresponding row. The multiple sub-protective members respectively cover the corresponding second region 102 of the multiple second regions 102 and at least partially expose the corresponding first region 101. As an example, when multiple battery cells 420 are arranged in two rows, the body portion 100 may include two first regions 101 and two second regions 102. The protective member 20 may include two sub-protective members. The two sub-protective members respectively cover the corresponding second region 102.

[0063] Using this arrangement, multiple sub-protective components can be arranged on the side of the insulator 10 facing away from the multiple cells 420. Each sub-protective component is small in size, facilitating fabrication, installation, and transportation. Multiple sub-protective components, when assembled, can cover a large area, thus adapting to battery packs 400 with a large number of cells 420.

[0064] In some embodiments, a single sub-protective component can be independently mounted on the insulating component 10. This provides greater flexibility in the installation and removal of the individual sub-protective component. In other embodiments, multiple sub-protective components can also be assembled and mounted on the insulating component 10. This increases the stability of the multiple sub-protective components.

[0065] In some embodiments, such as Figure 5 As shown, the protrusion 103 is U-shaped and has an opening 1030 at the edge of the body portion 100. A second groove 12 is continuously disposed on the body portion 100 around the outer periphery of the protrusion 103. As an example, the first region 101 can be a rectangular region. One side of the rectangular region extends to the edge of the body portion 100. The protrusion 103 is disposed along the remaining three sides of the rectangular region, thus forming a U-shaped structure. The second groove 12 is disposed along the outer periphery of the protrusion 103, forming a U-shaped groove. Using this arrangement, the protrusion 103 can form a continuous U-shaped protrusion structure at the edge of the first region 101. The second groove 12 can form a U-shaped groove at the outer periphery of the protrusion 103. A flexible circuit board 32 can be disposed within the U-shaped second groove 12. The flexible circuit board 32 can be connected to the electrode connection portions 31 on both sides of the explosion-proof valve 422 via the voltage sampling member 33, thereby reducing the number of flexible circuit boards 32. When transmitting voltage data, the voltage data of the electrode connection parts 31 on both sides of the explosion-proof valve 422 can be fed back through a single flexible circuit board 32.

[0066] This disclosure also provides an electrical device. The electrical device includes a battery pack 400 of any of the above-described types. The battery pack 400 of the electrical device includes a housing 510, a cover 520, a plurality of battery cells 420, an insulator 10, a protective element 20, and an electrical connector 30. The insulator 10 is disposed on the side of the plurality of battery cells 420 where electrodes 421 are provided. Each of the plurality of battery cells includes an electrode and an explosion-proof valve. The insulator 10 includes a first region 101, a second region 102, and a protrusion 103. The first region 101 covers the explosion-proof valves 422 of the plurality of battery cells 420. The protrusion 103 is disposed on the side of the insulator 10 opposite to the plurality of battery cells 420. The protrusion 103 can separate the first region 101 and the second region 102. The protective element 20 is connected to the side of the insulator 10 opposite to the plurality of battery cells 420. The protective element 20 abuts against the protrusion 103. The protective element 20 can cover the second region 102 and at least partially expose the first region 101. An electrical connector 30 is disposed between the second region 102 and the protective element 20. The electrical connector 30 is electrically connected to the electrodes 421 of the plurality of battery cells 420. With this arrangement, in the event of thermal runaway in a battery cell 420, conductive material ejected from the cell 420 may enter the first region 101. The second region 102, the protrusion 103, and the protective element 20 surround the electrical connector 30, preventing the ejected conductive material from entering the second region 102, thereby preventing the ejected conductive material from contacting the electrical connector 30 disposed between the second region 102 and the protective element 20, contributing to improved safety of the battery pack 400.

[0067] This disclosure also provides a power system. The power system includes an electric motor and a battery pack 400, which is any one of the above-described components. The battery pack 400 is electrically connected to the electric motor and can provide electrical energy to the electric motor.

[0068] During operation, the battery pack 400 receives a drive signal from the control system, indicating the required power output. Based on this signal, the battery pack 400 discharges, converting stored chemical energy into electrical energy to power the electric motor. Upon receiving the current, the electric motor converts it into mechanical energy, generating torque and propelling the vehicle forward. When the vehicle needs to decelerate or stop, braking is initiated. At this time, the electric motor can switch to generator mode, recovering some kinetic energy as the vehicle decelerates and converting it back into electrical energy stored in the battery, thus achieving regenerative braking.

[0069] In some embodiments, the power system may further include a power management system. The power management system can monitor and regulate the battery status in real time, thereby ensuring the safe and efficient operation of the battery.

[0070] This disclosure also provides an electric vehicle. The electric vehicle includes any of the power systems described above.

[0071] As an example, an electric vehicle could be a family-owned electric vehicle. In this way, a family-owned electric vehicle can rely on its power system to provide the energy and speed needed for daily commuting.

[0072] As another example, electric vehicles can be electric engineering vehicles, such as electric excavators and loaders. Electric engineering vehicles require greater torque and power output to complete complex construction tasks, so their power systems can include multiple battery packs.

[0073] As another example, electric vehicles can be autonomous vehicles. In this way, autonomous vehicles can use sensors, computer vision, and artificial intelligence algorithms to perceive their surroundings and make driving decisions.

[0074] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A battery pack (400), characterized in that, include: The housing (510) includes a top opening (511); A cover (520) is provided at the top opening (511) and is detachably connected to the housing (510); Multiple battery cells (420) are disposed inside the housing (510), and each includes an electrode (421) and an explosion-proof valve (422). The electrode (421) and the explosion-proof valve (422) are disposed at intervals on the same side wall of the battery cell (420). An insulating member (10) is arranged on the side of the plurality of battery cells (420) on which the electrodes (421) are provided. The insulating member (10) includes a body portion (100) and a protrusion portion (103). The body portion (100) includes a first region (101) and a second region (102). The first region (101) covers the explosion-proof valve (422) of the plurality of battery cells (420). The protrusion portion (103) protrudes from the side of the body portion (100) opposite to the plurality of battery cells (420) and separates the first region (101) and the second region (102). A protective element (20) is attached to the side of the insulator (10) opposite to the plurality of cells (420) and abuts against the protrusion (103) to cover the second region (102) and at least partially expose the first region (101); and An electrical connector (30) is disposed between the second region (102) and the protective member (20) and is electrically connected to the electrodes (421) of the plurality of battery cells (420).

2. The battery pack (400) according to claim 1, characterized in that, The second region (102) includes a plurality of first grooves (11), the plurality of first grooves (11) being disposed on the side of the body portion (100) opposite to the plurality of battery cells (420), and the plurality of first grooves (11) respectively corresponding to two adjacent battery cells (420) among the plurality of battery cells (420), and the electrical connector (30) includes: Multiple electrode connection portions (31) are each disposed in a corresponding first groove (11) and electrically connected to the positive electrode of one of the two adjacent battery cells (420) and the negative electrode of the other of the two adjacent battery cells (420).

3. The battery pack (400) according to claim 2, characterized in that, The second region (102) further includes a second groove (12) and a plurality of first notches (13). The second groove (12) is disposed along the peripheral edge of the protrusion (103) on the side of the body portion (100) opposite to the plurality of battery cells (420). The plurality of first grooves (11) are all spaced apart from the second groove (12). The plurality of first grooves (11) and the second grooves (12) are connected via the plurality of first notches (13). The electrical connector (30) further includes: A flexible circuit board (32) is at least partially disposed within the second recess (12); and Multiple voltage sampling components (33) are each at least partially disposed within a corresponding first notch (13), and both ends of the voltage sampling components (33) are electrically connected to the flexible circuit board (32) and the corresponding electrode connection portion (31), respectively.

4. The battery pack (400) according to claim 2 or 3, characterized in that, The second region (102) also includes a pair of through holes (14) disposed at the bottom of the plurality of first grooves (11), wherein the positive electrode of one of the two adjacent cells (420) and the negative electrode of the other of the two adjacent cells (420) are respectively disposed at the corresponding through holes (14) in the pair of through holes (14).

5. The battery pack (400) according to claim 2 or 3, characterized in that, The second region (102) also includes a first limiting part (15) disposed in the plurality of first grooves (11), and each of the plurality of electrode connection parts (31) includes a second limiting part (311). The first limiting part (15) and the second limiting part (311) cooperate to limit the electrode connection part (31).

6. The battery pack (400) according to claim 3, characterized in that, Each of the plurality of electrode connection portions (31) further includes a recess (310) disposed on the side facing the protective member (20), and the recess (310) corresponds to the first notch (13), and the voltage sampling member (33) is electrically connected to the electrode connection portion (31) at the recess (310).

7. The battery pack (400) according to any one of claims 1 to 3, characterized in that, The protective element (20) includes a second notch (21) corresponding to the first region (101), and the protrusion (103) abuts against the protective element (20) along the edge of the second notch (21) to expose the first region (101).

8. The battery pack (400) according to any one of claims 1 to 3, characterized in that, The plurality of battery cells (420) are arranged in multiple rows, the body portion (100) includes a plurality of first regions (101) and a plurality of second regions (102), each of the plurality of first regions (101) covering the explosion-proof valve (422) of the corresponding row of battery cells (420), and the protective member (20) includes: Multiple sub-protective elements, each corresponding to a cell (420) in a corresponding row, each sub-protective element covers a corresponding second region (102) in a plurality of second regions (102) and at least partially exposes a corresponding first region (101).

9. The battery pack (400) according to claim 3, characterized in that, The protrusion (103) is U-shaped and has an opening (1030) provided at the edge of the body part (100), and the second groove (12) is continuously provided on the body part (100) around the outer periphery of the protrusion (103).

10. An electrical appliance, characterized in that, include: The battery pack (400) according to any one of claims 1 to 9.

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