Battery pack with multiple battery cells connected in series

Abstract

The utility model discloses a battery pack with multiple battery cells connected in series, which comprises a main board, two first battery cells and at least one second battery cell, the first battery cells are connected to a nickel pad of the main board through first tabs, the second battery cells are connected to a small adapter plate through second tabs, the main board is connected with the small adapter plate, the number of the first battery cells is two, and the number of the second battery cells is not less than one. The outer sides of the first tab and the second tab are coated with the insulating gaskets, the second battery cell is connected with the main board through the small adapter plate, the battery cell and the main board special for series connection of multiple battery cells do not need to be independently designed and customized, the universality of the main board, the battery cells and the tabs is improved, the material cost is reduced, and the internal structure of the battery pack is more compact and reasonable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery cell, specifically relates to a battery pack of multiple battery cell series connection. BACKGROUND

[0002] The power of the mobile power supply on the market is getting bigger and bigger, usually adopts multiple battery cell series connection stacking, increases the power reserve, provides more durable power support for the user. In the prior art, such as patent announcement number CN213071291U, a three battery cell series connection structure is disclosed, including a large battery cell and two small battery cells arranged on the back of the large battery cell, the positive and negative poles of the large battery cell and the two small battery cells are connected in series by welding on the protection plate, the positive pole of the large battery cell and the negative pole of one of the small battery cells share a solder pad, and the negative pole of the large battery cell and the positive pole of the other small battery cell share a solder pad, the space of the protection plate and the back of the small battery cell is utilized, and the space utilization rate of the protection plate is higher, but the structure is suitable for three battery cell series connection, and the sizes of the three battery cells are not completely the same, which is not convenient for application to other multiple battery cell series connection battery packs, and is not conducive to further improving the universality of the protection plate and the battery cell and reducing the material cost. SUMMARY

[0003] The utility model aims at overcoming the above-mentioned defects or problems existing in the background art, and provides a battery pack of multiple battery cell series connection.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A battery pack of multiple battery cell series connection, including mainboard, first battery cell, second battery cell, the first battery cell is connected to the nickel sheet pad of mainboard through the first tab, the second battery cell is connected to the adapter small plate through the second tab, the mainboard is connected with the adapter small plate, the number of first battery cell is 2, the number of second battery cell is not less than 1, the first tab and the second tab are covered with insulating gasket outside.

[0006] In some embodiments of the utility model, the mainboard is reserved with polarity copper area at both ends.

[0007] In some embodiments of the utility model, the adapter small plate is arranged with sawtooth solder pad on both sides, which is convenient for welding connection with the mainboard.

[0008] In some embodiments of the utility model, the mainboard is provided with polarity tin solder pad, and the polarity tin solder pad is used for connecting with the sawtooth solder pad.

[0009] In some embodiments of the utility model, the first battery cell and the second battery cell are polymer battery cells, and the number of second battery cell is 1-2.

[0010] In some embodiments of the utility model, the number of the adapter plate and the second electric core is 2, and the two adapter plates are arranged on the two sides of the main plate respectively.

[0011] In some embodiments of the utility model, the adapter plate is connected with the second pole lug of the second electric core through the small plate nickel sheet.

[0012] In some embodiments of the utility model, the small plate nickel sheet is arranged on the side of the adapter plate away from the main plate.

[0013] In some embodiments of the utility model, the adapter plate is arranged above the nickel sheet pad.

[0014] From the above description of the utility model, compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. When multiple electric cores are connected in series, the second electric core is connected with the main plate through the adapter plate, without the need of separately designing and customizing special electric cores and main plates, improving the versatility of the main plate, electric core and pole lug, helping to reduce material cost, saving main plate space, and making the structure inside the battery pack more compact and reasonable.

[0016] 2. The adapter plate is arranged above the nickel sheet pad, and the small plate nickel sheet is arranged on the side of the adapter plate away from the main plate, so as to utilize space and realize compact layout.

[0017] 3. The adapter plate is arranged with sawtooth pads on the two sides for tin soldering connection with the main plate, the sawtooth pads help to increase the contact area of welding, can be in full contact with the solder during welding, and after the solder cools and solidifies, it will be filled in the groove of the sawtooth, so that the welding joint is more firm, improving the stability of the connection, and ensuring that the welding joint will not easily loosen due to vibration. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following briefly introduces the drawings needed to be used in the embodiment description, obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0019] Figure 1 It is the structural schematic diagram of the utility model;

[0020] Figure 2 It is the A enlarged view of the utility model; Figure 1

[0021] Figure 3 It is the arrangement schematic diagram of the adapter plate of the utility model;

[0022] ​Figure 4 The utility model discloses a Figure 3 The B amplification view of

[0023] Main figure mark explanation:

[0024] 1, mainboard, 10, polarity tin soldering pad, 2, first electric core, 20, first tab, 3, second electric core, 30, second tab, 4, adapter small board, 40, small board nickel sheet, 41, sawtooth soldering pad, 5, insulating gasket. Specific implementation

[0025] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are the preferred embodiments of the utility model, and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor fall within the scope of the utility model.

[0026] In the claims, the description and the above drawings of the utility model, unless otherwise explicitly limited, the terms such as "first", "second" or "third" are used to distinguish different objects, and are not used to describe a specific order.

[0027] In the claims, the description and the above drawings of the utility model, unless otherwise explicitly limited, for the orientation words, such as the terms "center", "transverse", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "back", "left", "right", "clockwise", "counterclockwise" indicate the orientation or position relationship based on the orientation and position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and are not used to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the utility model.

[0028] In the claims, the description and the above drawings of the utility model, unless otherwise explicitly limited, such as the terms "fixedly connected" or "fixedly connected", should be understood broadly, that is, any connection mode without displacement relationship and relative rotation relationship between the two, that is, it includes undetachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or elements.

[0029] In the claims, the description and the above drawings of the utility model, such as the terms "include", "have" and their variants, are intended to "include but not limited to".

[0030] Embodiment, see Figures 1-4 :

[0031] A battery pack with multiple series-connected battery cells, comprising a main plate 1, a first battery cell 2, and a second battery cell 3, the first battery cell 2 is connected to the nickel pad of the main plate 1 through a first tab 20, the second battery cell 3 is connected to an adapter plate 4 through a second tab 30, the main plate 1 is connected to the adapter plate 4, so that the main plate 1 does not need to be customized for different battery pack models, and there is no need to separately design and customize the battery cells, the main plate 1, thereby improving the versatility of the main plate 1, the battery cells, and the tabs; the main plate 1 is provided with polarity copper areas at both ends, and the two polarity copper areas are respectively positive and negative, which are used to realize electrical functions and provide positive and negative connection points between each battery cell and an external circuit or other components.

[0032] The number of the first battery cells 2 is 2, and the number of the second battery cells 3 is not less than 1, the first battery cells 2 and the second battery cells 3 are arranged in a stack, and the outer side of the first tab 20 and the second tab 30 is covered with an insulating gasket 5, which plays an insulating and protective role, prevents the surface of the tab from being abraded, prolongs the service life, and ensures the long-term reliability of the battery.

[0033] Preferably, the first battery cells 2 and the second battery cells 3 are polymer battery cells, and the number of the second battery cells 3 is 1-2. In the production process, the two first battery cells 2 are welded to the main plate 1 first, and then the second battery cell 3 is welded to the adapter plate 4 and combined in series with the main plate 1.

[0034] As an embodiment, when the number of the second battery cells 3 is 1, the adapter plate 4 corresponding to the second battery cell 3 is arranged on either side of the main plate 1, and when the number of the adapter plate 4 and the second battery cell 3 is both 2, the two adapter plates 4 are arranged on both sides of the main plate 1.

[0035] As an embodiment, the adapter plate 4 is connected to the second tab 30 of the second battery cell 3 through a plate nickel pad 40.

[0036] As an embodiment, the plate nickel pad 40 is arranged on the side of the adapter plate 4 away from the main plate 1, and the space on the side of the adapter plate 4 away from the main plate 1 is divided, so that the structure inside the battery pack is more compact and reasonable, the welding operation is more convenient, which helps to ensure the welding quality and production efficiency, and effectively avoids heat accumulation and facilitates heat dissipation.

[0037] As an embodiment, the main plate 1 is provided with a polarity tin solder pad 10, which is used to be connected to a zigzag pad 41; preferably, a side-end tin solder process is adopted between the main plate 1 and the adapter plate 4 during welding.

[0038] As an implementation, the adapter plate 4 is arranged with serrated pads 41 on both sides to facilitate tin soldering connection with the mainboard 1. Compared with common flat pads, the serrated edges of the serrated pads 41 are zigzag, which helps to increase the contact area of welding, can be in full contact with the solder during welding, and after the solder cools and solidifies, it will be filled in the grooves of the serrations, so that the welding is more firm, improves the stability of the connection, and ensures that the welding place will not be easily loosened due to vibration.

[0039] As an implementation, the adapter plate 4 is arranged above the nickel sheet pad. For the nickel sheet pads located on the same side of the mainboard 1 and the polar tin solder pads 10, the nickel sheet pads are located between the polar tin solder pads 10 on both sides, which helps to make full use of the space above the nickel sheet pads and realize compact layout.

[0040] The above description and embodiment are used to explain the protection scope of the present application, but do not constitute a limitation on the protection scope of the present application. Through the inspiration of the present application or the above embodiment, those skilled in the art can obtain the modification, equivalent replacement or other improvement of the embodiment of the present application or one part of the technical features by combining with the common knowledge, the ordinary technical knowledge in the art and / or the prior art through logical analysis, reasoning or limited test, which should be included in the protection scope of the present application.

Claims

1. A multi-cell series connected battery pack, characterized by: The application relates to a battery cell, which comprises a main plate (1), a first electric core (2) and a second electric core (3), the first electric core (2) is connected to a nickel sheet pad of the main plate (1) through a first tab (20), the second electric core (3) is connected to an adapter small plate (4) through a second tab (30), the main plate (1) is connected with the adapter small plate (4), the number of the first electric core (2) is two, the number of the second electric core (3) is not less than one, and the first tab (20) and the second tab (30) are covered with an insulating gasket (5) outside.

2. The multi-cell series battery pack of claim 1, wherein: Polarity copper-covered areas are reserved at both ends of the main plate (1).

3. The multi-cell series battery pack of claim 1, wherein: Sawtooth-shaped pads (41) for facilitating welding connection with the main plate (1) are arranged on both sides of the adapter small plate (4).

4. The multi-cell series battery pack of claim 3, wherein: The main plate (1) is provided with polarity tin soldering pads (10) for being connected with the sawtooth-shaped pads (41).

5. The multi-cell series battery pack of claim 1, wherein: The first electric core (2) and the second electric core (3) are polymer electric cores, and the number of the second electric core (3) is one to two.

6. The multi-cell series battery pack of claim 5, wherein: The number of the adapter small plate (4) and the number of the second electric core (3) are both two, and the two adapter small plates (4) are arranged on both sides of the main plate (1).

7. The multi-cell series battery pack of claim 1, wherein: The adapter small plate (4) is connected with the second tab (30) of the second electric core (3) through a small plate nickel sheet (40).

8. The multi-cell series battery pack of claim 7, wherein: The small plate nickel sheet (40) is arranged on the side, away from the main plate (1), of the adapter small plate (4).

9. The multi-cell series battery pack of any one of claims 1-8, wherein: The adapter small plate (4) is arranged above the nickel sheet pad.

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