Battery pack

Abstract

The utility model discloses a battery pack. The battery pack comprises a battery pack shell; the one or more battery cell modules are arranged in the battery pack shell and can store electric energy; the battery cell module comprises a plurality of battery cell units; the circuit board assembly is electrically connected with the battery cell module and can manage electric energy and information transmission of the battery pack; the battery pack further comprises an operating piece, a triggering part and an elastic part are formed on the operating piece, and the triggering part is restored to the second position from the first position by means of elastic deformation of the elastic part; when the trigger part is located at the first position, the circuit board assembly is triggered to start a preset function; when the trigger part is located at the second position, the circuit board assembly keeps the preset function closed. The battery pack operating part has good springback operation hand feeling, is stable in characteristic, is not easy to deform, is not easy to omit and lose, and is easy to assemble.

Description

Technical Field

[0001] The present application relates to the technical field of power tools, and in particular to a battery pack. Background Art

[0002] A battery pack in the related technology can power various power tools or some household appliances and other electrical equipment to meet user needs. The above-mentioned battery pack is generally provided with display, lighting and other functions in addition to the charging and discharging functions. These functions can be enabled in response to user operations. The relevant operating structure should have good operating feel, stable structural characteristics, low cost, easy assembly and other characteristics.

[0003] This section provides background information related to the present application which is not necessarily prior art. Utility Model Content

[0004] One object of the present application is to solve or at least alleviate part or all of the above problems. To this end, one object of the present application is to provide a battery pack.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] A battery pack comprises: a battery pack shell; one or more battery cell modules, which are arranged in the battery pack shell and can store electric energy; the battery cell module includes a plurality of battery cell units; a circuit board assembly, which is electrically connected to the battery cell module and can manage the electric energy and information transmission of the battery pack; wherein the battery pack also comprises: an operating member, the operating member is formed with a trigger portion and an elastic portion, the trigger portion relies on the elastic deformation of the elastic portion to restore from a first position to a second position; when the trigger portion is in the first position, the circuit board assembly is triggered to start a preset function; when the trigger portion is in the second position, the circuit board assembly keeps the preset function closed.

[0007] In some embodiments, the battery pack further includes a terminal assembly, which is electrically connected to the circuit board assembly, and the terminal assembly includes a positive terminal, a negative terminal, and a data terminal.

[0008] In some embodiments, the battery pack further includes a cell holder, which supports and / or accommodates the cell units.

[0009] In some embodiments, the elastic portion of the operating member is an elastic arm, the elastic arm abuts against the battery cell bracket, and the elastic arm belongs to an integrated structure of the operating member.

[0010] In some embodiments, two elastic arms are respectively located on two sides of the trigger portion or one elastic arm is located in the middle of the trigger portion.

[0011] In some embodiments, a linkage element is disposed on the circuit board assembly, and the trigger portion contacts the linkage element when it is located at the first position, and does not contact the linkage element when it is located at a non-first position.

[0012] In some embodiments, the operating member further includes an operating portion, the operating portion is disposed on the battery pack housing, and the trigger portion and the elastic portion are located inside the battery pack housing.

[0013] In some embodiments, when the operating portion is operated, the elastic portion is subjected to force and then drives the trigger portion to contact the linkage element on the circuit board assembly; after the operating portion loses operation, the elastic portion recovers and then drives the trigger portion away from the linkage element.

[0014] In some embodiments, the operating element is a function button.

[0015] In some embodiments, the battery pack further includes a light guide column, which can guide the light of the light-emitting component of the circuit board assembly to the outside of the battery pack housing.

[0016] A battery pack comprises: a battery pack shell; one or more battery cell modules, which are arranged in the battery pack shell and can store electric energy; the battery cell modules include multiple battery cell units, and the positive terminals or negative terminals of the battery cell units are connected to the positive terminals or negative terminals of other battery cell units through battery cell connecting sheets; the battery pack also comprises: a battery cell holder, which is arranged in the battery pack shell and can support and / or accommodate at least some of the battery cell units; the positive terminals or negative terminals of at least some of the battery cell units are on the same polarity end face, and an insulating colloid is arranged between the battery cell holder and the polarity end face.

[0017] In some embodiments, the battery cell support is provided with a glue filling port for filling the insulating glue.

[0018] In some embodiments, a sealing groove for accommodating insulating colloid is provided on the battery cell support.

[0019] In some embodiments, the sealing groove on the battery cell support can be connected to the positive terminal and / or the negative terminal of each battery cell unit on the same polarity end surface.

[0020] In some embodiments, the sealing grooves on the battery cell support are arranged in a grid shape.

[0021] In some embodiments, the battery pack is provided with a battery pack shell, insulating paper, a cell support provided with a sealing groove and containing insulating colloid, a cell connecting sheet and a cell unit in sequence from the outside to the inside.

[0022] In some embodiments, the insulating paper covers at least a portion of the sealing groove on the battery cell support to form a sealing cavity for accommodating the insulating colloid.

[0023] In some embodiments, on the same polarity end face, the electrical connection between the positive terminal or negative terminal of a battery cell unit and the battery cell connecting piece is sealed in an insulating colloid, so that the positive terminals or negative terminals of any two battery cell units are insulated from each other except for the conductive path realized by the battery cell connecting piece.

[0024] In some embodiments, the positive terminals and / or negative terminals of multiple battery cell units on the same polarity end face are electrically connected through a battery cell connecting sheet to achieve series connection and / or parallel connection between the battery cell units.

[0025] In some embodiments, the insulating colloid accounts for less than 5% of the total volume of the battery pack.

[0026] In some embodiments, the insulating colloid accounts for less than 5% of the total weight of the battery pack.

[0027] In some embodiments, the battery pack powers a first type of power tool and / or a second type of power tool, wherein the first type of power tool is a handheld power tool and the second type of power tool is an outdoor work vehicle.

[0028] A battery pack comprises: a battery pack shell; one or more battery cell modules, which are arranged in the battery pack shell and can store electric energy; the battery cell modules include multiple battery cell units, and the positive terminal or negative terminal of the battery cell unit is connected to the positive terminal or negative terminal of other battery cell units through a battery cell connecting sheet; the battery pack also comprises: a battery cell holder, which is arranged in the battery pack shell and can support and / or accommodate at least some of the battery cell units; the positive terminals or negative terminals of at least some of the battery cell units are on the same polarity end face, and the battery cell holder is provided with a sealing groove, the sealing groove is connected to the positive terminals and / or negative terminals of multiple battery cell units on the same polarity end face, and an insulating colloid is provided in the sealing groove.

[0029] A battery pack comprises: a battery pack shell; one or more battery cell modules, which are arranged in the battery pack shell and can store electric energy; the battery cell module comprises a plurality of battery cell units; a terminal assembly, which is electrically connected to the battery cell module and comprises a positive terminal, a negative terminal and a data terminal; the battery pack also comprises: a battery cell connecting sheet and a metal part; the battery cell connecting sheet has a main circuit part and a branch part; each branch part is electrically connected to the positive terminal or the negative terminal of a battery cell unit, the main circuit part is connected to each branch part and is electrically connected to the positive terminal or the negative terminal of the terminal assembly; the metal part is in contact with at least part of the main circuit part of the battery cell connecting sheet.

[0030] In some embodiments, the branch portion is parallel to the polarity end surface of the battery cell unit.

[0031] In some embodiments, the plane where the main circuit portion is located intersects with the plane where the branch circuit portion is located.

[0032] In some embodiments, the main circuit portion is vertically connected to the branch circuit portion.

[0033] In some embodiments, the area of ​​the main circuit portion is greater than or equal to the total area of ​​the branch portions of the battery cell connecting piece.

[0034] In some embodiments, the battery pack further includes a cell holder, and the cell connecting piece is disposed on an outer wall of the cell holder.

[0035] In some embodiments, the main circuit portion and the branch circuit portion are located on different sides of the battery cell holder.

[0036] In some embodiments, the metal member includes a first metal member connected to the positive terminal and / or a second metal member connected to the negative terminal.

[0037] In some embodiments, the first metal member and the second metal member are located on the same side or different sides of the battery cell support.

[0038] In some embodiments, the currents of multiple battery cell units electrically connected to multiple branch parts of the same battery cell connecting piece are combined and transmitted to the terminal assembly through the main circuit part of the battery cell connecting piece and the metal parts in contact therewith.

[0039] In some embodiments, the metal member is electrically connected to the main circuit portion of the battery cell connecting piece.

[0040] In some embodiments, the material of the metal piece is copper alloy or nickel alloy.

[0041] The benefit of the present application lies in that the operating part has its own elastic reset function through the structural setting of the operating part, which ensures the resilience of the operating part, improves the operating feel, and has a low possibility of deformation and failure. The integrated part can also effectively reduce the complexity of assembly and save related costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a three-dimensional diagram of a battery pack shown in one embodiment of the present application;

[0043] Figure 2 yes Figure 1 A three-dimensional diagram of a portion of the internal structure of the battery pack after a portion of the shell is removed;

[0044] Figure 3 yes Figure 1 A plan view of the operating components in the battery pack shown;

[0045] Figure 4 yes Figure 1 The shown battery pack is a three-dimensional view of the internal structure at one viewing angle after the shell is removed;

[0046] Figure 5 yes Figure 1 An exploded view of the internal structure of the battery pack is shown;

[0047] Figure 6 yes Figure 1 A three-dimensional view of the internal structure of the battery pack after the shell is removed from another perspective;

[0048] Figure 7 yes Figure 1 A three-dimensional view of the cell connectors and metal parts in the battery pack shown.

[0049] In the figure:

[0050] 100. battery pack; 101. insulating paper;

[0051] 1. Battery pack housing;

[0052] 2. Battery cell module; 21. Battery cell unit; 22. Polarity end face;

[0053] 4. Cell connection piece; 41. Main circuit part; 42. Branch circuit part;

[0054] 5. Battery support; 51. Sealing groove; 52. Glue filling port;

[0055] 6. Metal parts; 7. Circuit board assembly; 8. Terminal assembly;

[0056] 9. operating member; 91. elastic part; 92. trigger part; 93. operating part; 94. clamping part; 95. light guide column. DETAILED DESCRIPTION

[0057] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0058] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0059] In this application, the term "and / or" is a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "and / or" relationship.

[0060] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0061] In the present application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, and the like. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0062] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0063] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0064] In the present application, the terms “device”, “module” or “unit” may be implemented in the form of hardware or software to achieve specific functions.

[0065] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0066] After the battery pack is manufactured, it needs to be immersed in salt water to evaluate the safety of the battery pack. During the immersion test, creepage is likely to occur between the positive and negative electrodes of the battery cell. In order to eliminate the creepage phenomenon and ensure that the battery pack immersion test is carried out smoothly, Figure 1-Figure 7 As shown, the present application provides a battery pack 100 , which includes a battery pack housing 1 , one or more battery cell modules 2 , and a battery cell support 5 .

[0067] Among them, the battery pack shell 1 constitutes the main appearance of the battery pack 100 and has a accommodating space formed inside. The battery pack shell 1 can support and accommodate the various components to be described later. The battery cell module 2 is arranged in the accommodating space of the battery pack shell 1 and can store electrical energy; the battery cell module 2 includes a plurality of battery cell units 21, and the positive terminal or negative terminal of a battery cell unit 21 can be connected to the positive terminal or negative terminal of other battery cell units 21 through a battery cell connecting sheet 4. The positive and negative terminal connection relationship between the battery cell units 21 is determined by the specific battery cell series-parallel relationship in the battery pack 100. The battery cell holder 5 is arranged in the battery pack shell 1 and can support and / or accommodate at least part of the battery cell units 21. The positive terminal and / or negative terminal of at least part of the battery cell units 21 are on the same polarity end face 22. In the present application, an insulating colloid can be provided between the battery cell holder 5 and the polarity end face 22. As Figure 5 As shown, the polarity end surface 22 can be regarded as a physical plane, which is a plane where the positive terminals and / or negative terminals of the plurality of battery cells 21 are located.

[0068] By performing a sealing treatment on the polar end face 22, an insulating colloid is poured between the polar end face 22 and the battery holder 5 to form an insulating seal, which can isolate the positive and negative electrodes of the battery cell unit 21, thereby achieving the purpose of sealing protection. In this way, the creepage phenomenon can be eliminated to ensure that the battery pack 100 is immersed in salt water and tested smoothly. Moreover, compared with the solution of filling the entire battery pack 100 with glue, the amount of glue filling in this application can be significantly reduced, which is beneficial to cost reduction and resource saving.

[0069] like Figure 5 As shown, in some embodiments, the cell holder 5 is provided with a glue injection port 52 for injecting insulating glue. After the cell holder 5 and the cell module 2 are installed in the battery pack shell 1, the insulating glue can be smoothly injected between the cell holder 5 and the polar end face 22 through the glue injection port 52 opened on the cell holder 5. After the insulating glue solidifies, the polar end face 22 can be insulated and sealed, and the positive end or negative end of the cell unit 21 on the polar end face 22 is insulated and protected.

[0070] like Figure 4 and Figure 5 As shown, in some embodiments, a sealing groove 51 for accommodating insulating colloid is provided on the battery holder 5. By providing the sealing groove 51, during the process of insulating glue pouring, the insulating glue flows into the sealing groove 51, which can ensure that the solidified insulating colloid is stably connected to the battery holder 5 on the one hand, and can reduce the use of sealant on the other hand.

[0071] like Figure 4 and Figure 5 As shown, in some embodiments, the sealing groove 51 on the battery holder 5 can connect the positive terminal and / or negative terminal of each battery cell unit 21 on the same polarity end face 22. After the battery pack 100 is assembled, the sealing groove 51 is injected with insulating glue for sealing. Since the sealing groove 51 on the battery holder 5 can connect the positive terminal and / or negative terminal of each battery cell unit 21 on the same polarity end face 22, the insulating glue can flow along the sealing groove 51 to the positive terminal and / or negative terminal of each battery cell unit 21. After the insulating glue solidifies, it forms an insulating colloid, which plays an isolation role, thereby achieving the role of sealing protection.

[0072] like Figure 4 As shown, in some embodiments, the sealing grooves 51 on the battery holder 5 are arranged in a grid shape. The above arrangement enables the sealing grooves 51 to connect the positive terminal and / or negative terminal of each battery cell unit 21 on the same polarity end face 22. In the process of glue filling, it is only necessary to open a glue filling port 52 on the battery holder 5, and the insulating glue flows in through the glue filling port 52, and flows into each position of the sealing groove 51 along the sealing groove 51, thereby insulating and sealing the positive terminal and / or negative terminal of each battery cell unit 21 on the same polarity end face 22. Moreover, since the insulating colloid is only located in the sealing groove 51, it can ensure the insulating sealing effect while reducing the use of insulating glue, so that a smaller amount of insulating colloid can be used to effectively avoid creepage problems. In some embodiments, a plurality of groups of corresponding glue filling ports 52 and glue sealing grooves 51 may also be provided on the battery cell holder 5. The positive terminals and / or negative terminals of the plurality of battery cell units 21 on the same polarity end face 22 may be divided and sealed by different glue filling ports 52 and glue sealing grooves 51 according to their positional relationship, and insulating glue may be injected into the plurality of glue filling ports 52 simultaneously or sequentially to avoid the overly curved glue sealing groove 51 structure delaying the efficiency and effect of insulating glue injection.

[0073] like Figure 1 and Figure 5As shown, in some embodiments, the battery pack 100 is provided with a battery pack shell 1, an insulating paper 101, a cell holder 5 having a sealing groove 51 and containing an insulating colloid, a cell connecting sheet 4, and a cell unit 21 in sequence from the outside to the inside. The battery pack shell 1 and the cell holder 5 can support and protect the cell unit 21, and the insulating paper 101 and the insulating colloid can be provided to achieve electrical isolation of the cell unit 21 from the outside except for necessary electrical connections, thereby ensuring the stability and safety of the cell unit 21.

[0074] In some embodiments, the insulating paper 101 covers the sealing groove 51 on the battery holder 5, or at least covers part of the sealing groove 51, and can form a sealing cavity for accommodating the insulating colloid. The insulating paper 101 cooperates with the sealing groove 51 of the battery holder 5, so that the sealing groove 51 forms a sealing cavity. In the process of pouring the insulating glue, the insulating glue can only flow into the sealing cavity, and will not overflow from the sealing cavity to the outside of the battery holder 5, which can further reduce the amount of insulating glue used, improve the process difficulty, and enhance the operability of the glue pouring.

[0075] In some embodiments, the sealing cavity formed between the insulating paper 101 and the sealing groove 51 except the sealing port 52 is a sealed cavity. After assembly, the sealing cavity can be subsequently filled with glue through the sealing port 52. In addition, the insulating colloid can combine the insulating paper 101 with the battery holder 5 to prevent the insulating paper 101 from being damaged.

[0076] like Figure 4 and Figure 5 As shown, in some embodiments, on the same polarity end face 22, the electrical connection between the positive terminal or negative terminal of a battery cell unit 21 and the battery cell connecting sheet 4 is sealed in the insulating colloid, so that the positive terminals or negative terminals of any two battery cell units 21 are insulated from each other except for the conductive path realized by the battery cell connecting sheet 4. Through the above arrangement, the insulating colloid can effectively play the role of insulation and sealing, and does not affect the normal charging and discharging performance of the battery pack 100.

[0077] like Figure 4 As shown, in some embodiments, the positive terminals and / or negative terminals 1 of multiple battery cells 21 on the same polarity end face 22 are electrically connected through the battery cell connecting sheet 4 to achieve series connection and / or parallel connection between the battery cells 21. Through the above arrangement, the battery cells 21 are connected in series and / or in parallel to form a battery cell module 2 that meets the requirements of the relevant scenarios of the present application, which is convenient for management during the charging and discharging process.

[0078] In some embodiments, the insulating colloid accounts for less than 5% of the overall volume of the battery pack 100. Preferably, in some embodiments, the insulating colloid accounts for less than 3% of the overall volume of the battery pack 100, or is less than or equal to 2%. Through targeted sealing treatment, the volume proportion of the insulating colloid in the battery pack 100 is reduced, and the volume of the battery pack 100 is kept compact while ensuring sealing protection.

[0079] In some embodiments, the insulating colloid accounts for less than 5% of the total weight of the battery pack 100. Preferably, in some embodiments, the insulating colloid accounts for less than or equal to 3% or less than or equal to 2% of the total weight of the battery pack 100. Through targeted sealing treatment, the weight proportion of the insulating colloid in the battery pack 100 is reduced, so that the battery pack 100 can meet the requirements of lightweight.

[0080] like Figure 1 and Figure 5 As shown, the present application also provides a battery pack 100, including a battery pack shell 1, one or more battery cell modules 2 and a battery cell holder 5. The battery cell module 2 is arranged in the battery pack shell 1 and can store electrical energy; the battery cell module 2 includes a plurality of battery cell units 21, and the positive terminal or negative terminal of the battery cell unit 21 is connected to the positive terminal or negative terminal of other battery cell units 21 through a battery cell connecting sheet 4. The battery cell holder 5 is arranged in the battery pack shell 1 and can support and / or accommodate at least part of the battery cell units 21. The positive terminal or negative terminal of at least part of the battery cell units 21 is on the same polarity end face 22, and a sealing groove 51 is provided on the battery cell holder 5, and the sealing groove 51 connects the positive terminal and / or negative terminal of the plurality of battery cell units 21 on the same polarity end face 22, and an insulating colloid is provided in the sealing groove 51. As shown Figures 4 to 6 As shown, the battery cell holder 5 has a through opening facing the positive terminal or negative terminal of each battery cell unit 21 on the same polarity end face 22, and the multiple openings can be connected to each other, so as to form a sealing groove 51 with the glue filling port 52 on the edge side. After the injected insulating glue enters the sealing groove 51 from the glue filling port 52, it can contact the positive and negative terminals of the battery cell from the above-mentioned openings and finally seal the positive and negative terminals of each battery cell.

[0081] By performing a sealing treatment on the polar end face 22, an insulating colloid is poured into the sealing groove 51 connected to the positive end and / or negative end of the battery cell on the same polarity end face to form an insulating seal, which can isolate the positive and negative electrodes of the battery cell unit 21, thereby achieving the purpose of sealing protection. In the above manner, the creepage phenomenon can be eliminated to ensure that the salt water immersion test of the battery pack 100 is carried out smoothly. Moreover, compared with the solution of filling the entire battery pack 100 with glue, the amount of glue filling in this application can be significantly reduced, which is beneficial to cost reduction and resource saving.

[0082] In some embodiments, the battery pack 100 provided in the context of this application is applied to a first type of power tool and a second type of power tool, wherein the first type of power tool is a handheld power tool, and the second type of power tool is an outdoor work vehicle. The handheld power tool includes but is not limited to a circular saw, a chain saw, a reciprocating saw, a hand drill, an impact drill, an impact wrench, an impact screwdriver, an angle grinder, etc. The outdoor work vehicle may be a lawn mower or a snowplow. Alternatively, it may be an all-terrain vehicle, a golf cart, etc.

[0083] The battery pack usually integrates functions such as lighting and display. When these functions are needed, the corresponding buttons and other components need to be operated to trigger the corresponding functions. In the process of operation, in order to ensure the operating feel without increasing the difficulty of assembly, such as Figure 1-Figure 7 As shown, the present application provides a battery pack 100 , which includes a battery pack housing 1 , one or more battery cell modules 2 , a circuit board assembly 7 and an operating member 9 .

[0084] Among them, the battery cell module 2 is arranged in the battery pack shell 1 and can store electric energy; the battery cell module 2 includes a plurality of battery cell units 21. The circuit board assembly 7 is electrically connected to the battery cell module 2 and can manage the electric energy and information transmission of the battery pack 100. The operating member 9 is formed with a trigger portion 92 and an elastic portion 91, and the trigger portion 92 relies on the elastic deformation of the elastic portion 91 to restore from the first position to the second position; when the trigger portion 92 is in the first position, the circuit board assembly 7 is triggered to start the preset function; when the trigger portion 92 is in the second position, the circuit board assembly 7 keeps the preset function closed.

[0085] When the operating member 9 is operated and the trigger portion 92 moves to the first position, the preset function of the circuit board assembly 7 is triggered and started, and the elastic portion 91 is in an energy storage state of elastic deformation. After the operating member 9 is not operated, the elastic portion 91 pushes the trigger portion 92 to reset from the first position to the second position. The operating member 9 has its own elastic portion 91, so that the operating member 9 has its own elastic reset function, which ensures the resilience of the operating member 9 and improves the operating feel. Since there is no need to arrange an additional spring, the material cost of parts and the assembly manufacturing cost can be saved, and the complexity of assembly is reduced. The assembly process is simple, and the elastic portion 91 added to the operating member 9 is easy to take into account the possible deformation margin of the plastic part in advance, so that the operating member 9 will not fail due to deformation.

[0086] like Figure 1 and Figure 4As shown, in some embodiments, the battery pack 100 further includes a terminal assembly 8, and the terminal assembly 8 is electrically connected to the circuit board assembly 7. The terminal assembly 8 includes a positive terminal, a negative terminal, and a data terminal, which can be electrically connected to the battery cell module 2 storing energy in the battery pack 100, and can also be electrically connected to a device such as an electric tool after docking, so as to transmit electric energy between the battery pack 100 and the electric tool through the positive and negative terminals, and transmit data between the battery pack 100 and the electric tool through the data terminal. The transmission process of the above electric energy and information data can be managed and controlled by the controller and other components on the circuit board assembly 7.

[0087] like Figure 4 and Figure 5 As shown, in some embodiments, the battery pack 100 further includes a cell holder 5, which supports and / or accommodates the cell unit 21 to ensure the stability of the cell unit 21. For example, a space for accommodating the cell unit 21 may be provided on the cell holder 5 to facilitate placement and assembly of the cell unit 21.

[0088] like Figure 2 and Figure 3 As shown, in some embodiments, the elastic portion 91 of the operating member 9 is an elastic arm, which can abut against the outer wall of the battery holder 5, and the trigger portion 92, the elastic arm, and the operating portion 93 to be described later are all integrated structures of the operating member 9. When the operating member 9 is used to trigger the preset function, the trigger portion 92 moves from the second position to the first position, and the elastic arm is squeezed and elastically deformed; when the preset function is no longer needed, the elastic arm can push the trigger portion 92 to reset under the action of its own elastic force. During the operation, the operating member 9 has a rebound feel and a good user experience. In addition, the trigger portion 92 and the elastic arm are an integrated structure, which can reduce the difficulty of manufacturing, is easy to assemble, and is not easy to lose.

[0089] In some embodiments, two elastic arms are respectively located on both sides of the trigger portion 92 or one elastic arm is located in the middle of the trigger portion 92. By properly arranging the positions and number of the elastic arms, the rebound feel of the operating member 9 can be ensured, and the stability of the trigger portion 92 in the movement process between the first position and the second position can be ensured.

[0090] like Figure 2 and Figure 3As shown, in some embodiments, a linkage element is provided on the circuit board assembly 7, and the trigger portion 92 contacts the linkage element when it is in the first position, and does not contact the linkage element when it is in a non-first position. The linkage element may be a control contact or a micro switch, and the linkage element is integrated on the circuit board assembly 7. When the operating member 9 is manipulated so that the trigger portion 92 is in the first position, the trigger portion 92 triggers the linkage element, and the linkage element executes a corresponding preset function through the circuit board assembly 7, such as lighting, or starting a fan integrated on the battery pack 100, etc. By providing a linkage element, the circuit board assembly 7 is facilitated to cooperate with the trigger portion 92.

[0091] like Figure 3 As shown, in some embodiments, the operating member 9 further includes an operating portion 93, which is disposed on the battery pack housing 1, and the trigger portion 92 and the elastic portion 91 are located inside the battery pack housing 1. The operating portion 93 is exposed outside the battery pack housing 1, which is convenient for the user to press. The trigger portion 92 and the elastic portion 91 are located inside the battery pack housing 1, and the battery pack housing 1 is used to protect the trigger portion 92 and the elastic portion 91, and the position of the operation on the battery pack housing 1 can be limited.

[0092] like Figure 3 As shown, in some embodiments, in order to facilitate the installation of the operating member 9, a clamping portion 94 is protruded on the operating portion 93, and the clamping portion 94 is embedded between the battery pack shell 1 and the battery cell holder 5, thereby achieving the installation and fixation of the operating member 9 on the battery pack 100.

[0093] like Figure 2 and Figure 3 As shown, in some embodiments, when the operating portion 93 is operated, the elastic portion 91 is subjected to force and then drives the trigger portion 92 to contact the linkage element on the circuit board assembly 7. After the operating portion 93 loses operation, the elastic portion 91 recovers and then drives the trigger portion 92 away from the linkage element. In the process of pressing the operating portion 93, the elastic portion 91 is deformed by force, and the trigger portion 92 moves to the first position to trigger the linkage element, thereby starting the preset function corresponding to the linkage element. After the operating portion 93 loses operation, the elastic portion 91 pushes the trigger portion 92 to automatically reset under the action of its own elastic force.

[0094] In some embodiments, the operating member 9 is a function button. For example, the operating member 9 is a light display switch button, and the light-emitting member is lit when the linkage element is triggered, and the light-emitting member is extinguished when the linkage element is not triggered. In other embodiments, the operating member 9 can also be a fan switch button, and when the linkage element is triggered, the fan integrated in the battery pack 100 starts to rotate, and when the linkage element is not triggered, the fan stops rotating.

[0095] like Figure 1 , Figure 2 and Figure 5As shown, in some embodiments, the battery pack 100 further includes a light guide column 95, which can guide the light of the light-emitting element on the circuit board assembly 7 to the outside of the battery pack housing 1. By providing the light guide column 95, the light emitted by the light-emitting element can be guided, thereby ensuring the lighting effect.

[0096] like Figure 5 As shown, in some embodiments, the light guide column 95 and the operating member 9 are independent components. When a person presses the operating member 9, the light guide column 95 will not be blocked, and when the light-emitting element on the battery pack 100 is used for lighting or display, the lighting or display effect is not affected by the operator's operation.

[0097] As the capacity of the battery cell unit increases, the discharge current of the battery pack also increases, causing the battery cell connector to heat up seriously. Most of the current battery cell connectors cannot meet the increasing temperature rise requirements. In order to solve the above problems, such as Figure 1-Figure 7 As shown, the present application provides a battery pack 100. The battery pack 100 includes a battery pack housing 1, one or more battery cell modules 2, a terminal assembly 8, a battery cell connecting sheet 4 and a metal member 6.

[0098] Among them, the battery cell module 2 is arranged in the battery pack shell 1 and can store electric energy; the battery cell module 2 includes a plurality of battery cell units 21. The terminal assembly 8 is electrically connected to the battery cell module 2 and includes a positive terminal, a negative terminal and a data terminal. The battery cell connecting piece 4 has a main circuit part 41 and a branch part 42; each branch part 42 is electrically connected to the positive terminal or negative terminal of a battery cell unit 21, and in some cases, a branch part may also be electrically connected to the positive terminal and / or negative terminal of multiple battery cells 21 that have an electrical connection relationship; the main circuit part 41 is connected to each branch part 42 and is electrically connected to the positive terminal or negative terminal of the terminal assembly 8. The metal part 6 is in contact with at least part of the main circuit part 41 of the battery cell connecting piece 4.

[0099] By arranging the metal part 6 on at least part of the main circuit part 41, the metal part 6 and the main circuit part 41 together play a conductive role, thereby improving the heating effect of the main circuit part 41 and meeting the requirements of high current discharge temperature rise. In addition, by arranging the metal part 6 on the main circuit part 41, the process and structure are simple, which can meet the requirements of the overload capacity of the battery cell connecting piece 4 and the assembly requirements.

[0100] like Figure 6 As shown, in some embodiments, the branch portion 42 is parallel to the polar end face 22 of the battery cell unit 21. When the branch portion 42 is electrically connected to the positive terminal or the negative terminal of the battery cell unit 21, since the branch portion 42 is parallel to the polar end face 22 of the battery cell unit 21, it is easy to ensure the contact area between the branch portion 42 and the polar end face 22 of the battery cell unit 21, thereby ensuring stable and good conductive performance.

[0101] like Figure 1 and Figure 7 As shown, in some embodiments, the plane where the main circuit part 41 is located intersects with the plane where the branch part 42 is located. Through the above arrangement, it can be installed at the corner of the battery module, and while ensuring that the branch part 42 can be in contact and connected with the polar end face 22 of the battery cell unit 21, it is convenient to arrange the main circuit part 41. In this way, the battery pack 100 can be compact in structure.

[0102] like Figure 1 and Figure 7 As shown, in some embodiments, the main circuit portion 41 is vertically connected to the branch portion 42. Through the above arrangement, it is possible to ensure that the branch portion 42 is parallel to the polar end face 22 of the battery cell unit 21, thereby ensuring the area of ​​electrical connection between the branch portion 42 and the battery cell unit 21, ensuring the conductive performance, and the space occupied by the main circuit portion 41 is also small. In the manufacturing process, the battery cell connecting piece 4 can be manufactured by a stamping process, and then the main circuit portion 41 and the branch portion 42 that are vertically connected to each other are processed by a sheet metal process.

[0103] like Figure 7 As shown, in some embodiments, the area of ​​the main circuit portion 41 is greater than or equal to the total area of ​​the branch portion 42 of the battery cell connecting piece 4. Through the above arrangement, it can be ensured that the current conduction performance of the main circuit portion 41 converging the branch portion 42 meets the requirements, ensuring stable and good conductivity and improving the temperature rise condition.

[0104] like Figure 4 and Figure 5 As shown, in some embodiments, the battery pack 100 further includes a cell holder 5, and the cell connection piece 4 is disposed in the cell holder 5. The cell holder 5 is disposed in the battery pack housing 1 and can support and / or accommodate at least a portion of the cell unit 21. By providing the cell holder 5, the installation of the cell unit 21 is facilitated, and the cell connection piece 4 can be disposed on the cell holder 5, for example, it can be embedded at the opening position of the cell holder 5 or disposed on the outer wall of the cell holder 5 to be in contact with the polar end face 22 of the cell unit 21, thereby facilitating the installation of the cell connection piece 4 and the realization of the electrical connection relationship.

[0105] like Figure 5 and Figure 6As shown, in some embodiments, the main circuit portion 41 and the branch portion 42 are respectively located on different sides of the battery holder 5. The battery cell connection sheet 4 is arranged at the corner of the battery holder 5, the branch portion 42 can be electrically connected to the battery cell unit 21 in the battery holder 5, and the main circuit portion 41 can converge the current transmitted by the branch portion 42. Moreover, the main circuit portion 41 and the branch portion 42 are both located on different sides of the battery holder 5. For example, the branch portion 42 is embedded in the side of the battery holder 5 opposite to the polar end face 22, and the main circuit portion 41 is arranged on the outer wall of the battery holder 5 adjacent to the side, which can reduce the occupied space and ensure the compact structure of the battery pack 100.

[0106] In some embodiments, the metal member 6 includes a first metal member connected to the positive terminal and / or a second metal member connected to the negative terminal. By connecting the metal member 6 to the positive terminal and / or to the negative terminal, the metal member 6 can also play a conductive role, and part of the current on the main circuit part 41 flows into and / or to the negative terminal through the metal member 6. By providing a metal sheet to play a shunt role, the heat generation of the main circuit part 41 is improved, and the requirements of large current charging and discharging can be met.

[0107] In some embodiments, the first metal member and the second metal member are located on the same side or different sides of the cell holder 5. By arranging the first metal member and the second metal member on the side of the cell holder 5, it is convenient to install the first metal member and the second metal member. In addition, the first metal member and the second metal member can improve the heating of the main circuit part 41 of the cell connection piece 4 connected to the positive terminal and the main circuit part 41 of the cell connection piece 4 connected to the negative terminal.

[0108] like Figure 4 and Figure 6 As shown, in some embodiments, the currents of multiple cell units 21 electrically connected to multiple branch portions 42 of the same cell connection sheet 4 are combined and transmitted to the terminal assembly 8 through the main circuit portion 41 of the cell connection sheet 4 and the metal member 6 in contact therewith. By using the above-mentioned main circuit portion 41 to converge the currents transmitted by multiple branch portions 42 and then transmitting them to the terminal assembly 8, it is possible to avoid the branch portions 42 of the cell connection sheet 4 being directly electrically connected to the terminal assembly 8, thereby simplifying the circuit and reducing the materials used in the cell connection sheet 4.

[0109] like Figure 6As shown, in some embodiments, the metal part 6 is electrically connected to the main circuit portion 41 of the battery cell connecting piece 4. The metal part 6 can be connected to the main circuit portion 41 of the battery cell connecting piece 4 by spot welding. In the process of manufacturing the battery pack 100, the original spot welding process can be used without changing the original welding process. Of course, in another embodiment, the metal part 6 can also be hot-melt welded to the main circuit portion 41 of the battery cell connecting piece 4. By adopting the welding method, the contact area between the metal part 6 and the battery cell connecting piece 4 can be expanded, ensuring a stable connection between the metal part 6 and the main circuit portion 41 of the battery cell connecting piece 4.

[0110] In some embodiments, the metal part 6 is in contact with at least part of the main circuit portion 41 of the battery cell connecting piece 4. The metal part 6 and the battery cell connecting piece 4 can be in point contact or surface contact. The corresponding contact method can be adopted according to actual needs, and no excessive restrictions are made here.

[0111] In some embodiments, in order to reduce the potential safety hazard of thermal runaway of the battery pack 100, the structure of the battery pack shell 1 is designed, and the battery pack shell 1 is thinned at the position where the positive and negative ends of the multiple battery cells 21 in the battery cell module 2 are facing. When the overheated battery cell 21 expands, the expanding gas in the battery cell 21 can quickly break through the battery pack shell 1, thereby quickly releasing its internal energy, avoiding the fire and explosion of one battery cell 21 causing the fire and explosion of other battery cells 21, and reducing the explosion risk of the entire battery pack 100.

[0112] In some embodiments, the material of the metal member 6 is copper alloy or nickel alloy, so as to ensure good heat dissipation and electrical conductivity. For example, one of the materials of the metal member 6 is NB109.

[0113] In some embodiments, the battery pack 100 provided in the foregoing text of the present application is applied to a first type of power tool and a second type of power tool, the first type of power tool is a handheld power tool, and the second type of power tool is an outdoor work vehicle.

[0114] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. A battery pack, comprising: Battery pack housing (1); One or more battery cell modules (2), arranged in the battery pack housing (1) and capable of storing electric energy; the battery cell module (2) comprises a plurality of battery cell units (21); A circuit board assembly (7) electrically connected to the battery cell module (2) and capable of managing the transmission of electric energy and information of the battery pack (100); Characterized in that the battery pack (100) further comprises: An operating member (9), the operating member (9) being formed with a trigger portion (92) and an elastic portion (91), the trigger portion (92) being restored from a first position to a second position by means of elastic deformation of the elastic portion (91); when the trigger portion (92) is located at the first position, the circuit board assembly (7) is triggered to start a preset function; when the trigger portion (92) is located at the second position, the circuit board assembly (7) keeps the preset function turned off.

2. The battery pack according to claim 1, characterized in that: The battery pack (100) further comprises a terminal assembly (8), wherein the terminal assembly (8) is electrically connected to the circuit board assembly (7), and the terminal assembly (8) comprises a positive terminal, a negative terminal and a data terminal.

3. The battery pack according to claim 1, characterized in that: The battery pack (100) further comprises a battery cell support (5), wherein the battery cell support (5) supports and / or accommodates the battery cell unit (21).

4. The battery pack according to claim 3, characterized in that: The elastic part (91) of the operating member (9) is an elastic arm, the elastic arm abuts against the battery holder (5), and the elastic arm belongs to the integrated structure of the operating member (9).

5. The battery pack according to claim 4, characterized in that: The two elastic arms are respectively located on two sides of the trigger portion (92) or one elastic arm is located in the middle of the trigger portion (92).

6. The battery pack according to claim 1, characterized in that: The circuit board assembly (7) is provided with a linkage element, and the trigger portion (92) contacts the linkage element when it is located at the first position, and does not contact the linkage element when it is located at a position other than the first position.

7. The battery pack according to claim 1, characterized in that: The operating member (9) further comprises an operating portion (93), wherein the operating portion (93) is arranged on the battery pack housing (1), and the trigger portion (92) and the elastic portion (91) are located inside the battery pack housing (1).

8. The battery pack according to claim 7, characterized in that: When the operating part (93) is operated, the elastic part (91) is subjected to force and then drives the trigger part (92) to contact the linkage element on the circuit board assembly (7); after the operating part (93) loses operation, the elastic part (91) recovers and then drives the trigger part (92) away from the linkage element.

9. The battery pack according to claim 1, characterized in that: The operating element (9) is a function button.

10. The battery pack according to claim 1, characterized in that: The battery pack (100) further comprises a light guide column (95), wherein the light guide column (95) is capable of guiding light of the light-emitting component of the circuit board assembly (7) toward the outside of the battery pack housing (1).

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