Battery pack

Abstract

The utility model relates to the technical field of power batteries, and discloses a battery pack, which comprises a battery compartment, battery cell stacking bodies and a battery information acquisition mechanism, and the battery information acquisition mechanism is arranged between the battery cell stacking bodies on two sides; the battery information acquisition mechanism comprises an acquisition joint and a connection circuit board, an acquisition nickel sheet is fixedly arranged on the connection circuit board, a tab is arranged on the battery core stacking body, and the end part of the acquisition nickel sheet is bent to be in contact with the tab. According to the utility model, the battery information acquisition mechanism is arranged in the middle of the battery compartment, the battery core stacks are symmetrically arranged on the two sides of the battery information acquisition mechanism, the bendable acquisition nickel sheets are arranged on the connection circuit board to be in contact with the tabs of the batteries, and the acquisition nickel sheets and the tabs are supported by the tab support bracket; therefore, the utilization rate of the whole battery compartment is higher, and meanwhile, the connection process of the battery information acquisition mechanism and the battery is more convenient and quicker.

Description

Technical Field

[0001] This utility model relates to power batteries, and more particularly to a battery pack. Background Technology

[0002] With the booming development of the new energy industry, the market demand for low-cost and high-safety battery systems is gradually increasing. Simplifying the structure, improving battery safety performance, and reducing costs as much as possible while ensuring that battery function is not affected has become a trend.

[0003] To collect information such as system voltage and temperature, existing batteries typically have a sampling system, usually located near the edge of the casing. To collect information such as the temperature and voltage of the battery cells, the battery system generally uses a sampling nickel plate to electrically connect the cells and the sampling system. The connection steps between the battery cells and the sampling system in existing battery systems are as follows: the battery cell and the connecting nickel plate are welded together; the integrated battery cell and connecting nickel plate are then installed into the casing and welded to the adapter nickel plate of the sampling system.

[0004] The above-mentioned technical solutions have low space utilization in the battery box because the sampling interface is located near the edge of the box and sufficient space needs to be reserved for wiring harness installation. Secondly, the existing technology requires nickel sheets to be welded onto the cells in advance, which increases the production process and material costs. Therefore, a battery pack is provided to solve the above problems. Utility Model Content

[0005] The main purpose of this utility model is to provide a battery pack that addresses the problems of existing battery sampling systems where the sampling interface is located near the edge of the housing, requiring sufficient space for wiring harness installation, resulting in low space utilization in the battery pack. Additionally, existing technologies require pre-welding nickel sheets onto the battery cells, increasing production steps and material costs.

[0006] To achieve the above-mentioned utility model objectives, the first aspect of this utility model proposes a battery pack, including a battery compartment, and a battery cell stack and a battery information acquisition mechanism disposed inside the battery compartment. The battery cell stack is disposed on both sides inside the battery compartment, and the battery information acquisition mechanism is disposed between the two battery cell stacks.

[0007] The battery information acquisition mechanism includes an acquisition connector and a connecting circuit board connected to both sides of the acquisition connector;

[0008] A nickel plate for collecting data is fixedly mounted on the connecting circuit board, and tabs are provided on the battery cell stack. The end of the nickel plate for collecting data contacts the tabs by bending.

[0009] The side of the battery cell stack is provided with a tab support bracket, and the collecting nickel sheet and the tab are supported by the tab support bracket.

[0010] Preferably, the cell stack is composed of multiple sets of cells and separators stacked alternately.

[0011] Preferably, the battery cell stacks on both sides are arranged in multiple symmetrical rows, and a battery information acquisition mechanism is provided between two sets of battery cell stacks in the same row. Connecting wire harnesses are installed between the multiple sets of battery information acquisition mechanisms.

[0012] Preferably, the electrode support bracket includes a base plate disposed at the bottom of the battery compartment and multiple sets of support plates stacked sequentially on the base plate, wherein the nickel collection sheet and the electrode are supported by the support plates.

[0013] Preferably, the upper and lower sides of the support plate are integrally formed with connecting plugs and connecting sockets, and adjacent sets of the support plates are connected to each other through connecting plugs and connecting sockets.

[0014] Preferably, a connection slot is provided on one side of the acquisition connector, and the connection harness is movably inserted into the connection slot.

[0015] Preferably, a support plate is fixedly welded to the bottom of the acquisition connector, and the connecting circuit board passes through the support plate and is electrically connected to the acquisition connector.

[0016] Preferably, the connecting circuit board is a flexible circuit board.

[0017] Preferably, the connecting circuit board includes a central flexible board, a connecting flexible board, and a side flexible board. The central flexible board is connected to both sides of the support plate, and the connecting flexible board is horizontally disposed at the bottom of the battery compartment. The two ends of the connecting flexible board are integrally formed with the central flexible board and the side flexible board, respectively.

[0018] Preferably, both the central flexible circuit board and the side flexible circuit board have multiple protruding connecting parts integrally formed on their sides, and the collecting nickel sheet is fixedly connected to the protruding connecting parts, with each of the multiple protruding connecting parts corresponding to a battery cell.

[0019] Beneficial effects:

[0020] The battery pack of this utility model has a battery information collection mechanism located in the middle of the battery compartment, and the battery cell stacks are symmetrically arranged on both sides of the battery information collection mechanism. At the same time, a bendable collection nickel sheet is set on the connecting circuit board to contact the battery tabs. The collection nickel sheet and the battery tabs are pressed and bonded together by the tab support bracket. This makes the utilization rate of the entire battery compartment higher, and the connection process between the battery information collection mechanism and the battery is more convenient and faster. Attached Figure Description

[0021] Figure 1 This is a top view of the entire utility model;

[0022] Figure 2This is a perspective view of the overall outer surface of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the battery cell stack and battery information acquisition mechanism of this utility model;

[0024] Figure 4 This is a schematic diagram of the outer surface structure of the battery information collection mechanism of this utility model.

[0025] in:

[0026] 1. Battery compartment; 2. Cell stack; 21. Cell; 22. Separator; 23. Tab; 24. Tab support bracket; 241. Base plate; 242. Support plate; 243. Connecting socket; 244. Connecting plug; 3. Battery information acquisition mechanism; 31. Support plate; 32. Connecting circuit board; 321. Central flexible board; 322. Connecting flexible board; 323. Side flexible board; 33. Protruding connecting part; 34. Acquisition nickel sheet; 35. Acquisition connector; 36. Connecting slot; 4. Connecting harness.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0029] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] Reference Figure 1-4 An embodiment of the present invention provides a battery pack, including a battery compartment 1 and a battery cell stack 2 and a battery information acquisition mechanism 3 disposed inside the battery compartment 1. The battery cell stack 2 is disposed on both sides inside the battery compartment 1, and the battery information acquisition mechanism 3 is disposed between the two battery cell stacks 2.

[0033] The battery information acquisition mechanism 3 includes an acquisition connector 35 and a connecting circuit board 32 connected to both sides of the acquisition connector 35;

[0034] A nickel plate 34 for collecting data is fixedly mounted on the connecting circuit board 32, and an electrode tab 23 is mounted on the battery cell stack 2. The end of the nickel plate 34 is bent to contact the electrode tab 23.

[0035] The side of the cell stack 2 is provided with a tab support bracket 24. Before welding, the nickel sheet 34 is supported by an FPC bracket. During welding, the nickel sheet 34 and the tab 23 are supported by the tab support bracket 24.

[0036] The cell stack 2 is formed by alternating stacking of multiple sets of cells 21 and separator plates 22. The separator plates 22 are used to separate and protect the multiple stacked cells 21. The separator plates 22 are made of buffer foam, aerogel, etc., which can play a protective and separating role on the one hand, and reserve stress space for the expansion of the cells 21 during subsequent cycle use on the other hand.

[0037] The battery cell stacks 2 on both sides are arranged in multiple symmetrical rows. A battery information acquisition mechanism 3 is set between two sets of battery cell stacks 2 in the same row. The battery information acquisition mechanism 3 collects information from the two sets of battery cell stacks 2. The space is arranged in a reasonable manner, and the battery cell stacks 2 protect the battery information acquisition mechanism 3. A connecting harness 4 is installed between multiple sets of battery information acquisition mechanisms 3, so that multiple battery information acquisition mechanisms 3 are connected in parallel and series into the acquisition circuit. The connecting harness 4 passes through the middle to reduce space occupation and avoids the connecting harness 4 being placed on both sides, so that it will be squeezed and damaged during subsequent use.

[0038] The tab support bracket 24 includes a base plate 241 disposed at the bottom of the battery compartment 1 and multiple sets of support plates 242 stacked sequentially on the base plate 241. The nickel sheet 34 and the tab 23 are supported by the support plates 242 during welding.

[0039] The support plate 242 has a connecting plug 244 and a connecting socket 243 integrally formed on the upper and lower sides respectively. Two adjacent sets of support plates 242 are connected to each other through the connecting plug 244 and the connecting socket 243, so as to realize the interconnection and installation when multiple sets are stacked vertically, so that the adjacent support plates 242 can be neatly arranged, avoiding misalignment, and ensuring the squeezing and fixing effect on the nickel sheet 34 and the tab 23.

[0040] A connection slot 36 is provided on one side of the acquisition connector 35. The connection harness 4 is movably inserted into the connection slot 36. A plug is installed at the end of the connection harness 4 for easy and quick insertion and removal.

[0041] A support plate 31 is fixedly welded to the bottom of the acquisition connector 35, and a connecting circuit board 32 passes through the support plate 31 and is electrically connected to the acquisition connector 35.

[0042] The connecting circuit board 32 is a flexible circuit board. The connecting circuit board 32 includes a central flexible board 321, a connecting flexible board 322, and a side flexible board 323. The central flexible board 321 is connected to both sides of the support plate 31. The connecting flexible board 322 is horizontally set at the bottom of the battery compartment 1. The two ends of the connecting flexible board 322 are integrally formed with the central flexible board 321 and the side flexible board 323, respectively. The connection and installation are carried out through the flexible circuit board, which not only achieves the effect of wire harness concentration, but also provides a certain bending protection effect during installation.

[0043] Both the central flexible circuit board 321 and the side flexible circuit board 323 have multiple protruding connecting parts 33 integrally formed on their sides. The acquisition nickel sheet 34 is fixedly connected to the protruding connecting parts 33. The multiple protruding connecting parts 33 correspond one-to-one with the battery 21, making the assembly process of the entire battery information acquisition mechanism 3 more convenient and faster, while avoiding rigid contact that could cause the connecting circuit board 32 to break.

[0044] Working principle: By setting the battery information acquisition mechanism 3 in the middle of the battery compartment 1, and symmetrically setting the battery cell stack 2 on both sides of the battery information acquisition mechanism 3, and by setting a bendable acquisition nickel sheet 34 on the connecting circuit board 32 to contact the battery tab 23, the acquisition nickel sheet 34 is supported by the FPC bracket before welding. During welding, the tab 23 and the acquisition nickel sheet 34 are supported by the tab support bracket 24 and then welded. This makes the utilization rate of the entire battery compartment 1 higher, and the connection process between the battery information acquisition mechanism 3 and the battery is more convenient and faster.

[0045] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A battery pack, comprising a battery compartment, and a stack of battery cells and a battery information acquisition mechanism disposed inside the battery compartment, characterized in that, The battery cell stack is disposed on both sides inside the battery compartment, and the battery information acquisition mechanism is disposed between the two battery cell stacks. The battery information acquisition mechanism includes an acquisition connector and a connecting circuit board connected to both sides of the acquisition connector; A nickel plate for collecting data is fixedly mounted on the connecting circuit board, and tabs are provided on the battery cell stack. The end of the nickel plate for collecting data contacts the tabs by bending. The side of the battery cell stack is provided with a tab support bracket, and the collecting nickel sheet and the tab are supported by the tab support bracket.

2. The battery pack according to claim 1, characterized in that, The cell stack is composed of multiple sets of cells and separators stacked alternately.

3. The battery pack according to claim 2, characterized in that, The battery cell stacks on both sides are arranged in multiple symmetrical rows. A battery information acquisition mechanism is set between two sets of battery cell stacks in the same row, and a connecting harness is installed between multiple sets of battery information acquisition mechanisms.

4. The battery pack according to claim 2, characterized in that, The electrode support bracket includes a base plate disposed at the bottom of the battery compartment and multiple sets of support plates stacked sequentially on the base plate. The nickel collection sheet and the electrode are supported by the support plates.

5. The battery pack according to claim 4, characterized in that, The support plate has a connector plug and a connector socket integrally formed on its upper and lower sides, and two adjacent sets of support plates are connected to each other through the connector plug and connector socket.

6. The battery pack according to claim 3, characterized in that, A connection slot is provided on one side of the acquisition connector, and the connection harness is movably inserted into the connection slot.

7. The battery pack according to claim 6, characterized in that, A support plate is fixedly welded to the bottom of the acquisition connector, and the connecting circuit board passes through the support plate and is electrically connected to the acquisition connector.

8. The battery pack according to claim 7, characterized in that, The connecting circuit board is a flexible circuit board.

9. The battery pack according to claim 8, characterized in that, The connecting circuit board includes a central flexible board, a connecting flexible board, and a side flexible board. The central flexible board is connected to both sides of the support plate, and the connecting flexible board is horizontally arranged at the bottom of the battery compartment. The two ends of the connecting flexible board are integrally formed with the central flexible board and the side flexible board, respectively.

10. The battery pack according to claim 9, characterized in that, Both the central flexible circuit board and the side flexible circuit board have multiple protruding connecting parts integrally formed on their sides. The nickel collection sheet is fixedly connected to the protruding connecting parts, and each of the multiple protruding connecting parts corresponds to a battery cell.

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