Multi-series-parallel combined cover plate for battery cells

Abstract

The utility model discloses a multi-series-parallel combined cover plate for battery cells, belongs to the field of lithium batteries, and aims to overcome the defect that the conventional battery cover plate is only suitable for one battery specification. The cover plate comprises a cover body, a plurality of baffles are arranged on the cover body, the baffles and the cover body are fixedly connected in a split mode, the baffles divide the upper surface of the cover body into a plurality of installation areas, and a busbar is arranged on each installation area. As the baffle is fixed on the cover body in a split manner, the size of the mounting area can be adjusted to adapt to the sizes of the bus boards of different models, so that the cover body can adapt to the batteries of different models, the universality of the cover body is improved, the inventory pressure is reduced, and the manufacturing cost of the batteries is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of lithium batteries, and particularly relates to a multi-series and parallel combination cover plate for battery cells. Background Art

[0002] A polymer lithium battery includes a box body, a cover body, battery cells and an upper cover. The battery cells are installed in the box body, the cover body covers the box body, and the cover body has partition ribs to divide the upper surface of the cover body into multiple areas. Busbars are placed in different areas. The tabs of the battery cells pass through the cover body and the busbars and are welded to the busbars. Since the partition ribs are integrally formed with the cover body, the areas separated by the partition ribs are also fixed, and the cover body is only applicable to one specification of battery, resulting in a relatively high manufacturing cost of the battery. Summary of the Invention

[0003] The utility model provides a multi-series and parallel combination cover plate for battery cells in view of the problems existing in the prior art, aiming to overcome the defect that the existing battery cover plate is only applicable to one battery specification.

[0004] The utility model is realized as follows:

[0005] A multi-series and parallel combination cover plate for battery cells includes a cover body, characterized in that a plurality of baffles are provided on the cover body, the baffles are fixedly connected to the cover body separately, and the baffles divide the upper surface of the cover body into multiple installation areas, and a busbar is provided on each installation area.

[0006] The cover body includes at least two groups of installation positions, and baffles are installed at each group of installation positions to divide the cover body into installation areas with different numbers.

[0007] The cover body is provided with transverse partition ribs to divide the cover body into a first area and a second area. The cover body includes a first group of installation positions, a second group of installation positions and a third group of installation positions;

[0008] When the baffles are installed at the first group of installation positions, one baffle is provided on the first area to divide the first area into two installation areas, and two baffles are provided on the second area to divide the second area into three installation areas;

[0009] When the baffles are installed at the second group of installation positions, three baffles are provided on the first area to divide the first area into four installation areas, and four baffles are provided on the second area to divide the second area into five installation areas;

[0010] When the baffles are installed at the third group of installation positions, five baffles are provided on the first area to divide the first area into six installation areas, and six baffles are provided on the second area to divide the second area into seven installation areas.

[0011] The cover body is provided with a plurality of first through holes, and the bus bar is provided with second through holes corresponding to the first through holes one by one. The first through holes and the second through holes are for the pole ears of the battery cells to pass through. A positioning groove is arranged between adjacent first through holes. The lower end of the baffle is provided with a fixing seat, and the fixing seat is detachably fixed in the positioning groove.

[0012] The positioning groove includes a plurality of independent grooves, and the fixing seat has a plurality of fixing blocks, and the fixing blocks are installed in the independent grooves.

[0013] The cover body is provided with a detachable pole post frame, and the pole post frame extends above the bus bar.

[0014] The bus bar includes a negative bus bar and a positive bus bar. The positive bus bar and the negative bus bar are provided with conductive connection parts. The cover body is provided with four negative fixing holes and four positive fixing holes. The conductive connection part of the negative bus bar is connected to two negative fixing holes, and the conductive connection part of the positive bus bar is connected to two positive fixing holes.

[0015] For a multi-series and multi-parallel combined cover plate of a battery cell provided by the present utility model, since the baffle is separately fixed on the cover body, the size of the installation area can be adjusted to adapt to the size of bus bars of different models, so that the cover body can be applicable to batteries of different models, improving the versatility of the cover body, reducing the inventory pressure, and reducing the manufacturing cost of the battery. Description of the Drawings

[0016] Figure 1 It is a partial structural schematic diagram of the battery;

[0017] Figure 2 It is a partial structural schematic diagram of the cover plate of a four-series and six-parallel 12V battery;

[0018] Figure 3 It is a partial structural exploded view of the cover plate of a four-series and six-parallel 12V battery;

[0019] Figure 4 It is a structural schematic diagram of the baffle;

[0020] Figure 5 It is a partial structural schematic diagram of the cover plate of an eight-series and three-parallel 24V battery;

[0021] Figure 6 It is a partial structural schematic diagram of the cover plate of a twelve-series and two-parallel 36V battery.

[0022] Explanation of the attached drawing markings: 100, battery cell; 200, cover body; 210, horizontal spacing ribs; 211, negative electrode fixing hole; 212, positive electrode fixing hole; 220, first region; 230, second region; 240, installation region; 250, first through hole; 260, positioning groove; 261, independent groove; 300, baffle; 310, fixing seat; 311, fixing block; 400, bus bar; 410, second through hole; 420, negative electrode row; 430, positive electrode row; 440, conductive connection part; 500, pole column frame; 600, battery management system; 610, current-carrying bus bar. Detailed implementation manners

[0023] The following will further elaborate on the detailed implementation manners of the present utility model in conjunction with the accompanying drawings of the embodiments, so that the technical solutions of the present utility model are easier to understand and master. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] This embodiment provides a multi-series and parallel combination cover plate for polymer lithium battery cells, as Figure 1-4 shown, including a cover body 200. A plurality of baffles 300 are provided on the cover body 200. The baffles 300 are detachably and fixedly connected to the cover body 200. The baffles 300 divide the upper surface of the cover body 200 into a plurality of installation regions 240, and a bus bar 400 is provided on each installation region 240. Horizontal spacing ribs 210 are provided on the cover body 200 to divide the cover body 200 into a first region 220 and a second region 230.

[0025] The cover body 200 includes at least two groups of installation positions, and each group of installation positions installs a baffle 300 to divide the cover body 200 into different numbers of installation regions 240. In this embodiment, a plurality of first through holes 250 are provided on the cover body 200, and second through holes 410 corresponding to the first through holes 250 one by one are provided on the bus bar 400. The first through holes 250 and the second through holes 410 are used for the pole ears of the battery cell 100 to pass through, and the pole ears are welded to the bus bar 400. Positioning grooves 260 are provided between adjacent first through holes 250. A fixing seat 310 is provided at the lower end of the baffle 300, and the fixing seat 310 is detachably fixed in the positioning groove 260, so as to ensure the range of battery models applicable to the cover body 200 as much as possible. In this embodiment, taking three groups of installation positions as an example, they respectively correspond to three types of batteries: four series and six parallel 12V, eight series and three parallel 24V, and twelve series and two parallel 36V. The cover body 200 includes a first group of installation positions, a second group of installation positions, and a third group of installation positions.

[0026] As Figure 1-3As shown, when the cover is applied to a four-series and six-parallel 12V battery, a baffle 300 is installed at the first group of mounting positions, a baffle 300 is provided on the first area 220 to separate the first area 220 into two mounting areas 240, and two baffles 300 are provided on the second area 230 to separate the second area 230 into three mounting areas 240.

[0027] like Figure 5 As shown, when the cover is applied to eight-series and three-parallel 24V batteries, a baffle 300 is installed at the second group of mounting positions, three baffles 300 are provided on the first area 220 to divide the first area 220 into four mounting areas 240, and four baffles 300 are provided on the second area 230 to divide the second area 230 into five mounting areas 240.

[0028] like Figure 6 As shown, when the cover is applied to twelve series and two parallel 36V batteries, the baffle 300 is installed at the third group of mounting positions, five baffles 300 are provided on the first area 220 to divide the first area 220 into six mounting areas 240, and six baffles 300 are provided on the second area 230 to divide the second area 230 into seven mounting areas 240.

[0029] like Figure 3 As shown, the positioning groove 260 includes three independent grooves 261, and the fixing seat 310 has three fixing blocks 311, and the fixing blocks 311 are installed in the independent grooves 261. The fixing seat 310 and the positioning groove 260 are detachably fixed by friction. More independent grooves 261 and fixing blocks 311 increase the contact surface between the fixing seat 310 and the positioning groove 260, which can increase the firmness of the detachable fixation of the two. In other optional embodiments, the independent grooves 261 can also be two or more than three, and the number of fixing blocks 311 is the same as the number of independent grooves 261. In other optional embodiments, the fixing seat 310 can also be fixed in the positioning groove 260 by snapping.

[0030] like Figure 2 As shown, the cover 200 is provided with a detachable pole frame 500, and the pole frame 500 extends above the bus bar 400. In this way, the size of the cover plate can be made smaller, which is convenient for reducing the size of the battery. In other optional embodiments, the pole frame 500 can also be staggered above the bus bar 400 and integrally formed on the cover 200.

[0031] The bus bar 400 includes a negative bus bar 420 and a positive bus bar 430. The negative bus bar 420 and the positive bus bar 430 are respectively installed in the installation areas 240 at both ends of the second area 230. The positive bus bar 430 and the negative bus bar 420 are provided with conductive connection parts 440. Four negative fixing holes 211 and four positive fixing holes 212 are provided on the cover body 200. The conductive connection part 440 of the negative bus bar 420 is connected to two negative fixing holes 211, and the conductive connection part 440 of the positive bus bar 430 is fixedly connected to two positive fixing holes 212 by screws. Specifically, when the cover plate is applied to a 12V battery with four strings and six parallel connections, as Figure 1 shown, the corresponding conductive connection parts 440 are fixed to two negative fixing holes 211 and two positive fixing holes 212 near the middle of the cover body 200, so that the conductive connection parts 440 are in the middle area between the positive bus bar 430 and the negative bus bar 420, reducing the difference in the power transmission distance of each battery cell 100, which is beneficial to balancing the power consumption efficiency of each battery cell 100. As Figure 5 , 6 shown, when the cover plate is applied to batteries of two models with eight strings and three parallel connections of 24V and twelve strings and two parallel connections of 36V, the corresponding conductive connection parts 440 are fixed to two negative fixing holes 211 and two positive fixing holes 212 near the edge of the cover body 200.

[0032] The conductive connection part 440 of the negative bus bar 420 is connected to the battery management system 600 through a current-carrying bus bar 610. The battery management system 600 is connected to the negative electrode post at the pole post holder 500 through the current-carrying bus bar 610. The conductive connection part 440 of the positive bus bar 430 is directly connected to the positive electrode post at the corresponding pole post holder 500 through the current-carrying bus bar 610.

Claims

1. A battery cell multi-series and parallel combination cover plate, comprising a cover body (200), characterized in that: The cover body (200) is provided with a plurality of baffles (300), the baffles (300) and the cover body (200) are separately fixedly connected, the baffles (300) divide the upper surface of the cover body (200) into a plurality of installation areas (240), and each installation area (240) is provided with a busbar (400).

2. A battery cell multi-series and parallel combination cover according to claim 1, characterized in that: The cover body (200) comprises at least two groups of installation positions, each group of installation positions is equipped with a baffle (300), and the cover body (200) is divided into different numbers of installation areas (240).

3. The battery cell multi-series parallel combination cover plate according to claim 1, characterized in that: The cover body (200) is provided with a transverse spacing rib (210) to separate the cover body (200) into a first area (220) and a second area (230); the cover body (200) comprises a first group of installation positions, a second group of installation positions and a third group of installation positions; When the baffle (300) is installed at the first group of installation positions, one baffle (300) is provided on the first area (220) to separate the first area (220) into two installation areas (240), and two baffles (300) are provided on the second area (230) to separate the second area (230) into three installation areas (240); When the baffles (300) are installed at the second group of installation positions, three baffles (300) are provided on the first area (220) to divide the first area (220) into four installation areas (240), and four baffles (300) are provided on the second area (230) to divide the second area (230) into five installation areas (240); When the baffles (300) are installed at the third group of installation positions, five baffles (300) are provided on the first area (220) to divide the first area (220) into six installation areas (240), and six baffles (300) are provided on the second area (230) to divide the second area (230) into seven installation areas (240).

4. The battery cell multi-series parallel combination cover plate according to claim 1, characterized in that: The cover body (200) is provided with a plurality of first through holes (250), the busbar (400) is provided with second through holes (410) corresponding to the first through holes (250) one by one, the first through holes (250) and the second through holes (410) are used for the tabs of the battery cell (100) to pass through, positioning grooves (260) are provided between adjacent first through holes (250), and a fixing seat (310) is provided at the lower end of the baffle (300), and the fixing seat (310) is detachably fixed in the positioning groove (260).

5. A battery cell multi-series parallel combination cover plate according to claim 4, characterized in that: The positioning groove (260) comprises a plurality of independent grooves (261), and the fixing seat (310) comprises a plurality of fixing blocks (311), wherein the fixing blocks (311) are installed in the independent grooves (261).

6. The battery cell multi-series-parallel combination cover plate according to claim 1, characterized in that: A detachable pole frame (500) is provided on the cover body (200), and the pole frame (500) extends to the top of the busbar (400).

7. A battery cell multi-series-parallel combination cover according to any one of claims 1 to 6, characterized in that: The busbar (400) comprises a negative electrode row (420) and a positive electrode row (430), the positive electrode row (430) and the negative electrode row (420) are provided with a conductive connecting portion (440), the cover body (200) is provided with four negative electrode fixing holes (211) and four positive electrode fixing holes (212), the conductive connecting portion (440) of the negative electrode row (420) is connected to the two negative electrode fixing holes (211), and the conductive connecting portion (440) of the positive electrode row (430) is connected to the two positive electrode fixing holes (212).

Images