Lightweight battery pack

Abstract

The utility model discloses a lightweight battery pack, and belongs to the technical field of battery energy storage boxes. Comprising a bottom plate, the bottom plate is divided into a left battery module containing cavity and a right battery module containing cavity through a partition plate, a left battery module is arranged in the left battery module containing cavity, a right battery module is arranged in the right battery module containing cavity, a left conductive unit is arranged on the side, facing the left battery module, of the partition plate, and a right conductive unit is arranged on the side, facing the right battery module, of the partition plate. A left conductive unit is arranged on the side, facing the left battery module, of the bottom plate, a right conductive unit is arranged on the side, facing the right battery module, of the bottom plate, a panel is installed on the front side of the bottom plate, a positive electrode socket and a negative electrode socket are arranged on the panel, and the left battery module and the right battery module are connected in series through cooperation of the left conductive unit and the right conductive unit. The left conductive unit is electrically connected with the positive electrode socket, and the right conductive unit is electrically connected with the negative electrode socket. The advantages are that the passive heat dissipation area is large, and the heat dissipation effect is improved; the weight of non-main bearing components is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery energy storage boxes, and particularly relates to a lightweight battery pack. Background Art

[0002] With the rapid development of the domestic energy storage industry and growing awareness of efficient energy utilization, the rational design and development of battery packs has become increasingly important. A large number of cells are connected in series or parallel to form a battery module, which is then assembled into a battery pack. These battery packs are then assembled into a battery cluster, which forms a complete energy storage unit and provides a DC bus to meet user-side power storage requirements.

[0003] Existing battery packs generally install battery modules side by side in a box, which is the carrier of the entire battery pack. Most existing battery boxes use sheet metal structures, which are heavy and inconvenient to carry. Depending on the heat dissipation form, there is usually heat dissipation silicone or heat insulation material between the battery cells of large battery packs. As the energy density of batteries continues to increase, the thermal management problem of battery packs has become increasingly prominent. For active heat dissipation, there are phase change, liquid cooling plates, and air cooling. However, considering customer needs and actual cost issues, for passive heat dissipation, the existing box structure is relatively redundant, and a single battery pack is a sealed individual with insufficient heat exchange. In addition, the weight of the entire sheet metal shell is also relatively large, which requires certain improvements.

[0004] In view of the above-mentioned existing technologies, it is necessary to improve the structure of the existing battery pack. To this end, the applicant has made a useful design, and the technical solution to be introduced below was produced in this context. Utility Model Content

[0005] The purpose of the present invention is to provide a lightweight battery pack with a light overall weight, reduced cost and enlarged heat dissipation area.

[0006] The purpose of the present utility model is achieved in this way. A lightweight battery pack is characterized by: comprising a bottom plate, the bottom plate is divided into a left battery module accommodating cavity and a right battery module accommodating cavity by a partition, the left battery module accommodating cavity is provided with a left battery module, the right battery module accommodating cavity is provided with a right battery module, the partition is provided with a left conductive unit on the side facing the left battery module, and a right conductive unit on the side facing the right battery module, a panel is installed on the front side of the bottom plate, a positive socket and a negative socket are provided on the panel, the left battery module and the right battery module are connected in series through the cooperation of the left conductive unit and the right conductive unit, the left conductive unit is electrically connected to the positive socket, and the right conductive unit is electrically connected to the negative socket.

[0007] In a specific embodiment of the present invention, a dust shield is further included. The dust shield cover is arranged above the bottom plate to protect the left battery module and the right battery module.

[0008] In another specific embodiment of the present invention, the bottom plate and the panel are made of sheet metal, and the dust shield is made of a plastic plate.

[0009] In another specific embodiment of the present invention, it also includes a battery cell frame, the left battery module includes a left battery cell, the right battery module includes a right battery cell, the battery cell frame includes a pair of parallel side plates and a top plate connecting the tops of the pair of side plates, there are multiple left battery cells and they are arranged side by side along the front-to-back direction of the bottom plate between a pair of side plates of one battery cell frame; there are multiple right battery cells and they are arranged side by side along the front-to-back direction of the bottom plate between a pair of side plates of another battery cell frame.

[0010] In another specific embodiment of the present invention, heat dissipation holes are provided at intervals on the side panels and the top panel of the battery cell frame.

[0011] In another specific embodiment of the present invention, a pair of side panels of the battery cell frame are folded outward at the bottom to form fixed edges, and the bottom plate is folded inward at the front and rear ends to form connecting edges. The battery cell frame is fastened to the fixed edges and the connecting edges to fix the left battery module and the right battery module on the bottom plate respectively.

[0012] In another specific embodiment of the present invention, the battery cell frame forms a downwardly folded top guard at the edge of the top plate on the side away from the partition, and side guards are formed by bending the edges of a pair of side plates face to face. The top guard and side guards are used to press each left battery cell and each right battery cell toward the partition.

[0013] In a more specific embodiment of the present invention, the positive and negative poles of the left battery cell in the left battery module are arranged up and down, and the electrodes above each left battery cell are arranged in a positive-positive-negative-negative cycle from front to back, and the electrodes below are correspondingly arranged in a negative-negative-positive-positive cycle from front to back. The left conductive unit is provided with a left positive connecting plate at the front end of the upper side of the partition, and a left negative connecting plate is provided at the rear end, and a plurality of upper left conductive plates are arranged between the left positive connecting plate and the left negative connecting plate. The left positive connecting plate is used to connect the two left batteries located at the front. The left positive electrode of the cell, the left positive connecting plate protrudes from the partition and is electrically connected to the positive socket through a cable, the left negative connecting plate is used to connect the negative poles of the two left battery cells at the rear side, each upper left conductive plate is used to sequentially connect the four electrodes above the left battery cell in the middle, which are negative, negative, positive and positive from front to back, the left conductive unit is arranged with lower left conductive plates at intervals on the lower side of the partition, each lower left conductive plate is used to connect the four electrodes below the left battery cell, which are negative, negative, positive and positive from front to back, thereby making the left battery cells connected in parallel in pairs and then in series in sequence; the right battery module The positive and negative poles of the right battery cell in the group are arranged up and down, and the electrodes above each right battery cell are arranged in a positive-positive-negative-negative cycle from front to back, and the two electrodes on the back are positive poles. The electrodes below are correspondingly arranged in a negative-negative-positive cycle from front to back, and the two electrodes on the back are negative poles. The right conductive unit is at the rear end of the upper side of the partition and is provided with a right positive connecting plate corresponding to the left negative connecting plate. A right upper conductive plate is provided at intervals on the front side of the right positive connecting plate. The right positive connecting plate is used to connect the positive poles of the two right battery cells at the back. The right positive The connecting plate is electrically connected to the left negative connecting plate through a cable to realize the series connection of the left battery module and the right battery module. Each upper right conductive plate is used to sequentially connect the four electrodes above the other right battery cells, which are negative, positive, and positive in order from back to front. The right conductive unit is provided with lower right conductive plates arranged at intervals on the lower side of the partition. Each lower right conductive plate is used to sequentially connect the four electrodes below the right battery cells, which are negative, negative, positive, and positive in order from back to front, so that the right battery cells are connected in parallel in pairs and then in series in sequence. The lower right conductive plate located at the front side is also electrically connected to the negative socket through a cable.

[0014] In yet another specific embodiment of the present invention, insulating plates are provided on both sides of the partition, and the left conductive unit and the right conductive unit are respectively provided on the insulating plates.

[0015] Due to the adoption of the above-mentioned structure, the present invention has the following beneficial effects compared with the prior art: the battery module is supported by the base plate and adopts an open layout, which is convenient for maintenance, and has a large heat dissipation area, thereby improving the heat dissipation effect; the structure of the sheet metal base plate combined with the plastic dust shield reduces the weight of non-main load-bearing components and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram from front to back perspective.

[0018] In the figure: 1. Base plate, 11. Partition plate, 12. Left battery module accommodating cavity, 13. Right battery module accommodating cavity, 14. Connection edge; 2. Left battery module, 21. Left battery cell; 3. Right battery module, 31. Right battery cell; 4. Left conductive unit, 41. Left positive electrode connecting plate, 42. Left negative electrode connecting plate, 43. Upper left conductive plate, 44. Lower left conductive plate; 5. Right conductive unit, 51. Right positive electrode connecting plate, 52. Upper right conductive plate, 53. Lower right conductive plate; 6. Panel, 61. Positive electrode socket, 62. Negative electrode socket; 7. Dust shield; 8. Battery cell frame, 81. Side panel, 811. Fixed edge, 812. Side rib, 82. Top plate, 821. Top rib, 83. Heat dissipation hole. DETAILED DESCRIPTION

[0019] The specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings. However, the description of the embodiments does not limit the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as within the scope of protection of the present invention.

[0020] In the following description, all concepts related to directionality (or orientation) such as up, down, left, right, front and back are with respect to the position state of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be understood as special limitations on the technical solutions provided by the present invention.

[0021] See also Figure 1The present invention relates to a lightweight battery pack, comprising a base plate 1, which is divided into a left battery module accommodating chamber 12 and a right battery module accommodating chamber 13 by a partition 11. The left battery module accommodating chamber 12 houses a left battery module 2, and the right battery module accommodating chamber 13 houses a right battery module 3. The partition 11 is provided with a left conductive unit 4 on the side facing the left battery module 2, and a right conductive unit 5 on the side facing the right battery module 3. The partition 11 is provided with insulating plates 111 on both sides, and the left conductive unit 4 and the right conductive unit 5 are respectively disposed on the insulating plates 111. A panel 6 is mounted on the front side of the base plate 1, and a positive electrode socket 61 and a negative electrode socket 62 are disposed on the panel 6. The left battery module 2 and the right battery module 3 are connected in series through the cooperation of the left conductive unit 4 and the right conductive unit 5. The left conductive unit 4 is electrically connected to the positive electrode socket 61, and the right conductive unit 5 is electrically connected to the negative electrode socket 62.

[0022] Furthermore, the utility model also includes a dust shield 7, which is covered on the bottom plate 1 to protect the left battery module 2 and the right battery module 3. In this embodiment, the bottom plate 1 and the panel 6 are sheet metal, and the dust shield 7 is a plastic plate. The left battery module 2 and the right battery module 3 are arranged on the bottom plate 1. Compared with the existing battery pack box structure, the heat dissipation area is expanded and the heat dissipation effect is improved, which is conducive to ensuring the stability of the battery pack. In this solution, the left battery module 2 and the right battery module 3 are supported by the bottom plate 1, and the dust shield 7 can be made of a plastic plate, so the overall weight can be greatly reduced.

[0023] Furthermore, the present invention also includes a cell frame 8. The left battery module 2 includes a left cell 21, the right battery module 3 includes a right cell 31, and the cell frame 8 includes a pair of side panels 81 arranged in parallel and a top panel 82 connecting the tops of the pair of side panels 81. There are multiple left cells 21 and they are arranged in parallel along the front-to-back direction of the bottom plate 1 between a pair of side panels 81 of one cell frame 8; there are multiple right cells 31 and they are arranged in parallel along the front-to-back direction of the bottom plate 1 between a pair of side panels 81 of another cell frame 8. The left cell 21 and the right cell 31 are combined into a battery module through the cell frame 8, and heat dissipation holes 83 are provided on the side panels 81 and the top panel 82 to better dissipate heat from each cell.

[0024] The pair of side panels 81 of the cell frame 8 are folded outward at the bottom to form fixed edges 811. The bottom plate 1 is folded inward at the front and rear ends to form connecting edges 14. The cell frame 8 secures the left battery module 2 and the right battery module 3 to the bottom plate 1 by fastening the fixed edges 811 and the connecting edges 14. On the side of the cell frame 8 away from the partition 11, a downwardly folded top rib 821 is formed at the edge of the top plate 82. Side ribs 812 are formed by bending the edges of the pair of side panels 81 in a face-to-face relationship. The top rib 821 and side ribs 812 are used to press each left cell 21 and each right cell 31 toward the partition 11, thereby effectively contacting the left and right cells 21 and 31 with the left conductive unit 4 and right conductive unit 5, respectively.

[0025] Please continue to see Figure 1 , and combined with Figure 2 The positive and negative electrodes of the left battery cells 21 in the left battery module 2 are arranged vertically. The electrodes above each left battery cell 21 are arranged in a positive-positive-negative-negative cycle from front to back, and the electrodes below are correspondingly arranged in a negative-negative-positive cycle from front to back. The left conductive unit 4 is provided with a left positive electrode connecting plate 41 at the front end of the upper side of the partition 11, and a left negative electrode connecting plate 42 at the rear end. A plurality of upper left conductive plates 43 are arranged between the left positive electrode connecting plate 41 and the left negative electrode connecting plate 42. The left positive electrode connecting plate 41 is used to connect the positive electrodes of the two left battery cells 21 located at the front. The left positive electrode connecting plate 41 protrudes from the partition 11 and is electrically connected to the positive socket 61 via a cable. The left negative electrode connecting plate 42 is used to connect the negative electrodes of the two left battery cells 21 located at the rear. Each upper left conductive plate 43 is used to sequentially connect the four electrodes located above the middle left battery cell 21, which are negative, negative, positive, and positive in sequence from front to back. The left conductive unit 4 is provided with left lower conductive plates 44 arranged at intervals on the lower side of the partition 11. Each left lower conductive plate 44 is used to connect the four electrodes below the left battery cell 21, which are negative, positive and positive in sequence from front to back, thereby connecting the left battery cells 21 in pairs in parallel and then in series.

[0026] The positive and negative poles of the right battery cells 31 in the right battery module 3 are arranged up and down. The electrodes above each right battery cell 31 are arranged in a positive-positive-negative-negative cycle from front to back, and the two electrodes at the back are positive poles. The electrodes below are correspondingly arranged in a negative-negative-positive cycle from front to back, and the two electrodes at the back are negative poles. The right conductive unit 5 is provided with a right positive connecting plate 51 at the rear end of the upper side of the partition 11 and corresponding to the left negative connecting plate 42. A right upper conductive plate 52 is provided at a spacing in front of the right positive connecting plate 51. The right positive connecting plate 51 is used to connect the positive poles of the two right battery cells 31 at the back. The right positive connecting plate 51 is electrically connected to the left negative connecting plate 42 via a cable, thereby realizing the series connection of the left battery module 2 and the right battery module 3. Each upper right conductive plate 52 is used to sequentially connect to the four electrodes above the other right battery cells 31, in the order of negative, negative, positive, and positive from back to front. The right conductive unit 5 is provided with lower right conductive plates 53 spaced apart below the separator 11. Each lower right conductive plate 53 is used to sequentially connect to the four electrodes below the right battery cells 31, in the order of negative, negative, positive, and positive from back to front, thereby connecting the right battery cells 31 in parallel and then in series. The lower right conductive plate 53 located at the front is also electrically connected to the negative terminal socket 62 via a cable.

[0027] In this embodiment, there are sixteen left battery cells 21 and fourteen right battery cells 31. The specification of a single battery cell is 3.2v76ah. A total of thirty battery cells are first connected in parallel in pairs to form fifteen groups and then connected in series. The total battery module specification is 48v150ah.

Claims

1. A lightweight battery pack, characterized in that: The invention comprises a bottom plate (1), wherein the bottom plate (1) is divided into a left battery module accommodating chamber (12) and a right battery module accommodating chamber (13) by a partition (11), wherein a left battery module (2) is arranged in the left battery module accommodating chamber (12), and a right battery module (3) is arranged in the right battery module accommodating chamber (13), and wherein the partition (11) is provided with a left conductive unit (4) on a side facing the left battery module (2), and is provided with a right conductive unit (5) on a side facing the right battery module (3). There is a right conductive unit (5), a panel (6) is installed on the front side of the bottom plate (1), a positive socket (61) and a negative socket (62) are arranged on the panel (6), the left battery module (2) and the right battery module (3) are connected in series through the cooperation of the left conductive unit (4) and the right conductive unit (5), the left conductive unit (4) is electrically connected to the positive socket (61), and the right conductive unit (5) is electrically connected to the negative socket (62).

2. A lightweight battery pack according to claim 1, characterized in that: It also includes a dust shield (7), which is arranged above the bottom plate (1) to protect the left battery module (2) and the right battery module (3).

3. A lightweight battery pack according to claim 2, characterized in that: The bottom plate (1) and the panel (6) are made of sheet metal, and the dust shield (7) is made of a plastic plate.

4. A lightweight battery pack according to claim 1, characterized in that: The invention also comprises a cell frame (8), wherein the left battery module (2) comprises a left cell (21), the right battery module (3) comprises a right cell (31), the cell frame (8) comprises a pair of side plates (81) arranged in parallel and a top plate (82) connecting the tops of the pair of side plates (81), the left cell (21) being in plurality and arranged in parallel along the front-to-rear direction of the bottom plate (1) between a pair of side plates (81) of one cell frame (8); and the right cell (31) being in plurality and arranged in parallel along the front-to-rear direction of the bottom plate (1) between a pair of side plates (81) of another cell frame (8).

5. A lightweight battery pack according to claim 4, characterized in that: Heat dissipation holes (83) are provided at intervals on the side plates (81) and the top plate (82) of the battery cell frame (8).

6. A lightweight battery pack according to claim 5, characterized in that: A pair of side plates (81) of the battery cell frame (8) are folded outward at the bottom to form a fixed edge (811), and the bottom plate (1) is folded inward at the front and rear ends to form a connecting edge (14). The battery cell frame (8) is fastened to the fixing edge (811) and the connecting edge (14) to fix the left battery module (2) and the right battery module (3) on the bottom plate (1), respectively.

7. A lightweight battery pack according to claim 6, characterized in that: The battery cell frame (8) has a top rib (821) folded downwardly formed on the edge of the top plate (82) on the side away from the partition (11), and side ribs (812) are formed on the edges of a pair of side plates (81) that are bent face to face. The top rib (821) and the side ribs (812) are used to press each left battery cell (21) and each right battery cell (31) toward the partition (11).

8. A lightweight battery pack according to claim 4, characterized in that: The positive and negative electrodes of the left battery cell (21) in the left battery module (2) are arranged up and down, and the electrodes above each left battery cell (21) are arranged in a positive-positive-negative-negative cycle from front to back, and the electrodes below are correspondingly arranged in a negative-negative-positive-positive cycle from front to back. The left conductive unit (4) is provided with a left positive electrode connecting plate (41) at the front end of the upper side of the partition (11), and a left negative electrode connecting plate (42) at the rear end, and a plurality of upper left conductive plates (43) are arranged between the left positive electrode connecting plate (41) and the left negative electrode connecting plate (42). The left positive electrode connecting plate (41) is used to connect the positive electrodes of the two left battery cells (21) located at the front side. The left positive electrode connecting plate (42) is provided at the rear end. 1) protrudes from the partition (11) and is electrically connected to the positive socket (61) through a cable, the left negative electrode connecting plate (42) is used to connect the negative electrodes of the two left battery cells (21) located at the rear, each upper left conductive plate (43) is used to sequentially connect the four electrodes located above the middle left battery cell (21) from front to back, which are negative, negative, positive and positive, respectively; the left conductive unit (4) is provided with lower left conductive plates (44) arranged at intervals on the lower side of the partition (11), each lower left conductive plate (44) is used to connect the four electrodes located below the left battery cell (21) from front to back, which are negative, negative, positive and positive, respectively, so that the left battery cells (21) are connected in parallel in pairs and then in series in sequence; the right battery cells in the right battery module (3) The positive and negative electrodes of the right battery cells (31) are arranged up and down, the electrodes above each right battery cell (31) are arranged in a positive-positive-negative-negative cycle from front to back, and the two electrodes at the rear are positive electrodes, and the electrodes below are correspondingly arranged in a negative-negative-positive-positive cycle from front to back, and the two electrodes at the rear are negative electrodes, the right conductive unit (5) is provided with a right positive electrode connecting plate (51) at the rear end of the upper side of the partition (11) and corresponding to the left negative electrode connecting plate (42), and a right upper conductive plate (52) is arranged at intervals on the front side of the right positive electrode connecting plate (51), the right positive electrode connecting plate (51) is used to connect the positive electrodes of the two right battery cells (31) located at the rear side, and the right positive electrode connecting plate (51) is connected to the right positive electrode connecting plate (51) through a wire The cable is electrically connected to the left negative electrode connecting plate (42) to realize the series connection of the left battery module (2) and the right battery module (3). Each upper right conductive plate (52) is used to sequentially connect the four electrodes above the other right battery cells (31) which are negative, negative, positive and positive in order from back to front. The right conductive unit (5) is provided with lower right conductive plates (53) arranged at intervals on the lower side of the partition (11). Each lower right conductive plate (53) is used to sequentially connect the four electrodes below the right battery cells (31) which are negative, negative, positive and positive in order from back to front. Thus, the right battery cells (31) are connected in parallel in pairs and then in series in order. The lower right conductive plate (53) located at the front is also electrically connected to the negative electrode socket (62) through the cable.

9. The lightweight battery pack according to claim 1, characterized in that: The partition (11) is also provided with insulating plates (111) on both sides, and the left conductive unit (4) and the right conductive unit (5) are respectively provided on the insulating plates (111).

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