Battery pack and plug assembly

Abstract

The utility model relates to the technical field of battery packs, and provides a battery pack and plug assembly which comprises a battery cell assembly, a circuit board and an interface assembly. Wherein the circuit board and the battery cell assembly are relatively fixed and electrically connected; the interface assembly is mounted on the circuit board, the interface assembly comprises at least two connecting groups, the connecting groups are electrically connected with the battery cell assembly through the circuit board, each connecting group comprises a positive terminal and a negative terminal, all the positive terminals of the interface assembly are connected in parallel, and all the negative terminals of the interface assembly are connected in parallel; and the host can be electrically connected with one or more connecting groups. The plug assembly comprises positive pole insertion pieces and negative pole insertion pieces, the positive pole insertion pieces are electrically connected with the positive pole terminals in a one-to-one correspondence mode, and the negative pole insertion pieces are electrically connected with the negative pole terminals in a one-to-one correspondence mode. Therefore, the discharge power of the battery pack can be increased under the condition that the appearances of the metal terminal and the interface assembly are not changed.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a battery pack and a plug assembly. Background Technique

[0002] DC power tools are used more and more in our daily life, and at the same time, the power of power tools is also required to be larger and larger. The lithium battery packs used on DC power tools also increase the discharge current of the battery pack as the power increases. With the development of lithium battery technology and the wide application of non-polar ear battery cells, the discharge current of the battery cells is also increasing. At present, the discharge current of non-polar ear battery cells is 1.5 to 2 times that of ordinary battery cells, which also makes it possible to double the discharge current of the battery pack.

[0003] With the increase of the discharge current of the battery pack, the original heat dissipation system and metal output terminals of the battery pack and other designs can no longer meet the requirements of large current output, and they need to be redesigned. Especially for the metal output terminal system, because the design of the old battery pack has been finalized and has been put on the market, and the newly designed battery pack must be compatible with the old machine. This requires that the external dimensions of the metal output terminals of the newly designed battery pack cannot be larger than those of the metal output terminals of the old battery pack. If the external dimensions of the metal output terminals cannot be increased, the contact area of a single metal output terminal cannot be increased, and thus the overload current of the metal output terminal cannot be increased. This means that the overload current of the metal output terminal cannot be increased, that is to say, the output power of the battery pack cannot be increased. Therefore, the overload capacity problem of the metal output terminal has become the bottleneck of the battery pack for realizing ultra-large current discharge.

[0004] Therefore, there is an urgent need for a battery pack and a plug assembly to solve the above technical problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a battery pack and a plug assembly, which can increase the discharge power of the battery pack without changing the shape of the metal terminal.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The battery pack includes:

[0008] A battery cell assembly;

[0009] A circuit board, the circuit board is relatively fixed and electrically connected to the battery cell assembly;

[0010] Interface component, the above interface component is installed on the above circuit board. The above interface component includes at least two connection groups. The above connection groups are electrically connected to the above battery cell component through the above circuit board. The above connection group includes a positive terminal and a negative terminal, and all the above positive terminals of the above interface component are connected in parallel with each other, and all the above negative terminals are connected in parallel with each other. The host can be electrically connected to one or more of the above connection groups.

[0011] As a preferred technical solution of the above battery pack, both the above positive terminal and the above negative terminal are welded and fixed to the above circuit board.

[0012] As a preferred technical solution of the above battery pack, the above positive terminal and / or the above negative terminal includes a clamping part. The above clamping part includes two elastic pieces. One end of the two above elastic pieces is connected, and the other end forms an insertion interface. The other ends of the two above elastic pieces always have a moving tendency to approach each other.

[0013] As a preferred technical solution of the above battery pack, the above interface component further includes a socket. The above socket is fixed to the above circuit board. The above socket includes a plurality of receiving chambers, and at least one of the above positive terminals or one of the above negative terminals is inserted into each of the above receiving chambers.

[0014] As a preferred technical solution of the above battery pack, the above socket is provided with a first baffle. The above first baffle is arranged between the adjacent above positive terminal and the above negative terminal. The above first baffle is an insulating part.

[0015] As a preferred technical solution of the above battery pack, the above positive terminal and the above negative terminal further include an insertion part. The above insertion part is provided with a welding insert piece. The above welding insert piece passes through the bottom of the above socket and is welded and fixed to the above circuit board.

[0016] As a preferred technical solution of the above battery pack, the above socket further includes a second baffle. The above second baffle is arranged on the side of the above positive terminal and the above negative terminal facing away from the above insertion interface.

[0017] As a preferred technical solution of the above battery pack, the above socket further includes a bottom plate. The above bottom plate connects all the above first baffles into one body.

[0018] A plug component is also provided, which is applicable to the above battery pack. The feature is that the above plug component includes a positive insert piece and a negative insert piece. The above positive insert piece is electrically connected to the above positive terminals in one-to-one correspondence, and the above negative insert piece is electrically connected to the above negative terminals in one-to-one correspondence.

[0019] As a preferred technical solution of the above plug assembly, it further includes a mounting base. The mounting base is made of insulating material, and the positive electrode inserts and the negative electrode inserts are movably arranged with respect to the mounting base, including a first state and a second state. In the first state, all the positive electrode inserts and all the negative electrode inserts are electrically connected to the battery pack. In the second state, some of the positive electrode inserts and the same number of negative electrode inserts as the positive electrode inserts are electrically connected to the battery pack.

[0020] Advantages of the present utility model:

[0021] The present utility model provides a battery pack, which includes a battery cell assembly, a circuit board, and an interface assembly. Among them, the circuit board is relatively fixed and electrically connected to the battery cell assembly; the interface assembly is installed on the circuit board. The interface assembly includes at least two connection groups. The connection groups are electrically connected to the battery cell assembly through the circuit board. Each connection group includes a positive terminal and a negative terminal, and all the positive terminals of the interface assembly are connected in parallel with each other, and all the negative terminals are connected in parallel with each other. The host can be electrically connected to one of the connection groups or multiple connection groups. The battery cell assembly is used for storing electric energy; when the positive terminal and the negative terminal of the interface assembly are respectively electrically connected to the host, the battery cell assembly can discharge to the host. When the host needs to discharge with a small current, the host is only connected to one connection group of the battery pack; when the host needs to discharge with a large current, it is simultaneously electrically connected to several connection groups of the battery pack.

[0022] A plug assembly applicable to the battery pack is also provided. The plug assembly includes positive electrode inserts and negative electrode inserts. The positive electrode inserts are electrically connected to the positive terminals in a one-to-one correspondence, and the negative electrode inserts are electrically connected to the negative terminals in a one-to-one correspondence.

[0023] In this way, the battery pack can increase the discharge power of the battery pack without changing the shape of the metal terminals. Description of the drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present utility model and these drawings.

[0025] Figure 1 It is an assembly schematic diagram of the battery pack and the plug assembly provided by the embodiment of the present utility model;

[0026] Figure 2 It is a front view of the battery pack provided by the embodiment of the present utility model;

[0027] Figure 3It is a schematic structural diagram of the negative terminal provided by an embodiment of the present utility model;

[0028] Figure 4 It is a schematic structural diagram of the plug assembly provided by an embodiment of the present utility model.

[0029] In the figure:

[0030] X, the first direction; Y, the second direction;

[0031] 100, battery pack;

[0032] 110, battery cell assembly;

[0033] 120, circuit board;

[0034] 130, interface assembly; 131, positive terminal; 132, negative terminal; 1321, elastic piece; 1322, insertion part; 133, socket; 1331, first baffle; 1332, second baffle;

[0035] 200, plug assembly; 210, positive electrode insert piece; 220, negative electrode insert piece; 230, mounting seat. Detailed implementation manners

[0036] The following further describes the present utility model in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0037] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0038] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may also include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0039] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the main machine or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] As Figures 1 to 3 shown, the present utility model provides a battery pack 100, which includes a battery cell assembly 110, a circuit board 120 and an interface assembly 130. Among them, the circuit board 120 is relatively fixed to and electrically connected with the battery cell assembly 110; the interface assembly 130 is mounted on the circuit board 120. The interface assembly 130 includes at least two connection groups. The connection groups are electrically connected with the battery cell assembly 110 through the circuit board 120. The connection groups include positive terminals 131 and negative terminals 132. All the positive terminals 131 of the interface assembly 130 are connected in parallel with each other, and all the negative terminals 132 are connected in parallel with each other. The main machine can be electrically connected with one of the connection groups or multiple said connection groups.

[0041] Specifically, the battery cell assembly 110 is used for storing electric energy; when the positive terminal 131 and the negative terminal 132 of the interface assembly 130 are respectively electrically connected to the main machine, the battery cell assembly 110 can discharge to the main machine. When the main machine needs to discharge with a small current, the main machine is only connected to one connection group of the battery pack 100; when the main machine needs to discharge with a large current, it is simultaneously electrically connected to several connection groups of the battery pack 100.

[0042] In this way, the battery pack 100 can increase the discharge power of the battery pack 100 without changing the shape of the metal terminals.

[0043] Specifically, the output current of the positive terminals 131 and negative terminals 132 connected in parallel is greater than the output current of one positive terminal 131 and one negative terminal 132. The principle is a well-known technology and will not be elaborated here.

[0044] Optionally, the positive terminal 131 and / or the negative terminal 132 includes a clamping portion, the clamping portion includes two elastic pieces 1321, one ends of the two elastic pieces 1321 are connected, and the other ends form an insertion interface. The two elastic pieces 1321 always have a tendency to move closer to each other.

[0045] In this way, when the host is plugged into the battery pack 100, the two elastic pieces 1321 can clamp the plug of the host, maintaining the stability of the electrical connection and avoiding the problem of poor contact.

[0046] In other embodiments, both the positive terminal 131 and the negative terminal 132 are welded and fixed to the circuit board 120. In this way, the fixing form of the socket 133 can be omitted, and the positive terminal 131 and the negative terminal 132 are directly fixed to the circuit board 120 by welding.

[0047] Optionally, the interface component 130 further includes a socket 133. The socket 133 is fixed to the circuit board 120. The socket 133 includes a plurality of receiving chambers, and at least one positive terminal 131 or one negative terminal 132 is inserted into each receiving chamber.

[0048] Specifically, the positive terminal 131 and the negative terminal 132 are relatively fixed to the circuit board 120 through the socket 133, which can prevent the positive terminal 131 and the negative terminal 132 from being misaligned with the circuit board 120.

[0049] Optionally, the socket 133 is provided with a first baffle 1331. The first baffle 1331 is disposed between the adjacent positive terminal 131 and negative terminal 132. The first baffle 1331 is an insulating member. In this way, by separating the positive terminal 131 and the negative terminal 132 with the insulating first baffle 1331, it can prevent the positive terminal 131 and the negative terminal 132 from contacting and connecting, resulting in a short circuit.

[0050] Specifically, the positive terminal 131 and the negative terminal 132 further include an insertion portion 1322. The insertion portion 1322 is provided with a welding tab, and the welding tab passes through the bottom of the socket 133 and is welded and fixed to the circuit board 120.

[0051] Optionally, the socket 133 further includes a second baffle 1332. The second baffle 1332 is disposed on the side of the positive terminal 131 and the negative terminal 132 facing away from the insertion interface.

[0052] Specifically, the elastic pieces 1321 are arranged in sequence along the first direction X. An insertion port facing the second direction Y is formed between two elastic pieces 1321. The main body is inserted into the battery pack 100 along the second direction Y. During the insertion process, the main body applies a force along the second direction Y to the positive terminal 131 and the negative terminal 132. To maintain the stability of the positive terminal 131 and the negative terminal 132, the socket 133 is provided with a second baffle 1332, and the second baffle 1332 can abut against the positive terminal 131 and the negative terminal 132 along the second direction Y, applying a force to the positive terminal 131 and the negative terminal 132 in the direction opposite to the insertion direction of the main body.

[0053] Optionally, the socket 133 further includes a bottom plate, and the bottom plate connects all the first baffles 1331 into one body.

[0054] As Figure 4 shown, the present utility model further provides a plug assembly 200, which is applicable to the battery pack 100. The plug assembly 200 includes a positive electrode insert piece 210 and a negative electrode insert piece 220. The positive electrode insert piece 210 is electrically connected to the positive terminal 131 in one-to-one correspondence, and the negative electrode insert piece 220 is electrically connected to the negative terminal 132 in one-to-one correspondence.

[0055] Specifically, the plug assembly 200 is installed on the main body, and the plug assembly 200 is electrically connected to the unit in the equipment that requires electric energy. The plug assembly 200 includes a positive electrode insert piece 210 and a negative electrode insert piece 220. The positive electrode insert piece 210 is electrically connected to the positive terminal 131 of the battery pack 100, and the negative electrode insert piece 220 is electrically connected to the negative terminal 132 of the battery pack 100.

[0056] In this embodiment, the battery pack 100 is provided with two connection groups, that is, two positive terminals 131 and two negative terminals 132; the plug assembly 200 includes two positive electrode insert pieces 210 and two negative electrode insert pieces 220. The two positive electrode insert pieces 210 are connected to the two positive terminals 131, and the two negative electrode insert pieces 220 are connected to the two negative terminals 132.

[0057] Optionally, the plug assembly 200 further includes a mounting seat 230. The mounting seat 230 is made of insulating material. The positive electrode insert piece 210 and the negative electrode insert piece 220 are movably arranged with the mounting seat 230, including a first state and a second state. When in the first state, all the positive electrode insert pieces 210 and all the negative electrode insert pieces 220 are electrically connected to the battery pack 100. When in the second state, some of the positive electrode insert pieces 210 and the same number of some of the negative electrode insert pieces 220 are electrically connected to the battery pack 100.

[0058] Optionally, the positive electrode insert piece 210 and the negative electrode insert piece 220 are connected to the mounting seat 230 by means of sliding connection, rotational connection or other connection methods that can cause relative position changes between the positive electrode insert piece 210 and the negative electrode insert piece 220 and the mounting seat 230.

[0059] Exemplarily, the positive electrode insert piece 210 and the negative electrode insert piece 220 are rotatably connected to the mounting seat 230 and can be flipped out of the mounting seat 230 from within the mounting seat 230. When the positive electrode insert piece 210 and the negative electrode insert piece 220 are located within the mounting seat 230, they are in an idle state. When located outside the mounting seat 230, they can be electrically connected to the positive terminal 131 and the negative terminal 132. Assume that the plug assembly 200 includes two insert piece groups, and each insert piece group includes a positive electrode insert piece 210 and a negative electrode insert piece 220. The positive electrode insert piece 210 and the negative electrode insert piece 220 belonging to the same insert piece group rotate synchronously relative to the mounting seat 230. If the host only needs a small current discharge this time, only one insert piece group is extended and electrically connected to the battery pack 100, and the other group is located within the mounting seat 230. If the host needs a large current discharge this time, the two insert piece groups are extended and electrically connected to the battery pack 100.

[0060] In addition, the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. Battery pack, characterized in that, Comprising: a battery cell assembly (110); a circuit board (120), the circuit board (120) being relatively fixed and electrically connected to the battery cell assembly (110); an interface component (130), the interface component (130) being mounted on the circuit board (120), the interface component (130) including at least two connection groups, the connection groups being electrically connected to the battery cell assembly (110) through the circuit board (120), the connection groups including positive terminals (131) and negative terminals (132), and all the positive terminals (131) of the interface component (130) being connected in parallel with each other, and all the negative terminals (132) being connected in parallel with each other, and a host can be electrically connected to one of the connection groups or multiple connection groups.

2. The battery pack according to claim 1, wherein Both the positive terminal (131) and the negative terminal (132) are fixedly welded to the circuit board (120).

3. The battery pack according to claim 1, characterized in that, The positive terminal (131) and / or the negative terminal (132) includes a clamping portion, the clamping portion including two elastic pieces (1321), one ends of the two elastic pieces (1321) being connected, and the other ends forming an insertion interface, and the other ends of the two elastic pieces (1321) always having a moving tendency to approach each other.

4. The battery pack according to claim 3, wherein The interface component (130) further includes a socket (133), the socket (133) being fixed to the circuit board (120), the socket (133) including a plurality of receiving chambers, and at least one positive terminal (131) or one negative terminal (132) being inserted into each receiving chamber.

5. The battery pack according to claim 4, wherein The socket (133) is provided with a first baffle (1331), the first baffle (1331) being disposed between adjacent positive terminals (131) and negative terminals (132), and the first baffle (1331) being an insulating member.

6. The battery pack according to claim 4, wherein The positive terminal and the negative terminal further include an insertion portion (1322), the insertion portion (1322) being provided with a welding tab, and the welding tab passing through the bottom of the socket (133) and being fixedly welded to the circuit board (120).

7. The battery pack according to claim 4, wherein The socket (133) further includes a second baffle (1332), the second baffle (1332) being disposed on a side of the positive terminal (131) and the negative terminal (132) facing away from the insertion interface.

8. The battery pack according to claim 4, characterized in that, The socket (133) further includes a bottom plate, and the bottom plate connects all the first baffles (1331) into one body.

9. A plug assembly (200) adapted to the battery pack (100) according to any one of claims 1-7, characterized in that, The plug component (200) includes a positive insertion piece (210) and a negative insertion piece (220), the positive insertion piece (210) being electrically connected to the positive terminals (131) in one-to-one correspondence, and the negative insertion piece (220) being electrically connected to the negative terminals (132) in one-to-one correspondence.

10. The plug assembly (200) according to claim 9, characterized in that, It further includes a mounting base (230), the mounting base (230) being made of insulating material, and the positive electrode inserts (210) and the negative electrode inserts (220) are movably arranged with respect to the mounting base (230), including a first state and a second state. When in the first state, all the positive electrode inserts (210) and all the negative electrode inserts (220) are electrically connected to the battery pack (100). When in the second state, some of the positive electrode inserts (210) and the same number of the negative electrode inserts (220) corresponding thereto are electrically connected to the battery pack (100).

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