Modularized assembly soft package power battery

Abstract

The invention discloses a modularly-assembled soft package power battery which comprises soft package battery cells, battery cell brackets, bracket connecting pieces, battery cell tandem connection partition plates, heat conduction clamping plates and battery boxes, the two soft package battery cells are respectively embedded from the open frame openings at the two ends of the battery cell bracket to form a double-battery-cell module which can be connected in series through the bracket connecting piece to form the soft package power battery module; the battery cell tandem connection partition plates are arranged in non-tandem connection areas of the adjacent double battery cell modules, so that the adjacent copper bars are isolated through the battery cell tandem connection partition plates; the heat conduction clamping plates are clamped between the adjacent double-cell modules which are connected in series, and exposed heat conduction plate body parts of the heat conduction clamping plates are in heat conduction contact with the heat dissipation box body part of the battery box. Through the structural design of modular assembly of the battery cells, the convenience and accuracy during assembly of the battery cells and the supporting stability after assembly can be improved, heat dissipation between modules is optimized, and the safety of the battery is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of soft-pack batteries, and in particular relates to a modularly assembled soft-pack power battery. Background Art

[0002] Soft-pack power batteries are widely used in new energy vehicles, 3C consumer electronics, energy storage systems and other fields due to their high energy density and flexibility. The soft-pack cells of existing soft-pack power batteries are assembled in a stacked manner and wrapped in a shell on the outside. The stacked assembly makes the cells fit closely together and makes heat dissipation more difficult. In addition to the limited support of the shell, the cells lack other stability support, resulting in poor mechanical strength of the cell assembly, affecting the safety and stability of the battery. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a modular assembled soft-pack power battery. By designing the structure of modular assembly of battery cells, the convenience and accuracy of battery cell assembly and the support stability after assembly can be improved, the heat dissipation between modules can be optimized, and the battery safety can be improved.

[0004] Technical solution: To achieve the above-mentioned purpose, a modular assembled soft-pack power battery of the present invention includes a soft-pack battery cell, a battery cell bracket, a bracket connector, a battery cell series partition, a heat-conducting clamp and a battery box;

[0005] The battery holder is a frame structure, one battery holder corresponds to two soft-pack batteries, and the two soft-pack batteries are respectively inserted from the open frame openings at both ends of the battery holder, so that the electrode sheets of the soft-pack batteries are in contact with the aluminum bars on the battery holder for welding connection, forming a dual-cell module that can be connected in series through the holder connector to form a soft-pack power battery module, and the welding position of the dual-cell module is located on the side;

[0006] The soft-packed cells of the adjacent dual-cell modules are electrically connected in series through copper bars, and the cell series partition is arranged in a non-series area of ​​the adjacent dual-cell modules so that the adjacent copper bars are isolated by the cell series partition;

[0007] The heat-conducting clamp is clamped and arranged between the adjacent dual-cell modules connected in series, so that the two side surfaces of the heat-conducting clamp are respectively fitted with the soft-pack cells of the dual-cell modules in adjacent positions; the heat-conducting clamp has an exposed heat-conducting plate body extending to the outside of the soft-pack power battery module, and the battery box is correspondingly provided with a heat dissipation box body, and the exposed heat-conducting plate body extends to be in thermal conduction contact with the heat dissipation box body, so as to realize thermal conduction heat dissipation of transferring the heat generated inside the soft-pack power battery to the outside.

[0008] Furthermore, an inner ring frame wall of the battery holder is paved with an elastic pad, and the soft-pack battery cell is embedded in the battery holder by squeezing the elastic pad, and the two soft-pack battery cells therein are tightly fitted.

[0009] Furthermore, the bracket connector is a screw, and the battery holder is provided with a series connection hole through which the screw is inserted; the open frame openings at both ends of the battery holder in the series connection direction are respectively provided with a plug and a socket, and when the dual battery module is connected in series through the bracket connector, the plug is inserted into the corresponding socket to realize series positioning.

[0010] Furthermore, a side welding notch is reserved on one side of the battery holder, and the aluminum row is located in the side welding notch, so that the welding position of the electrode sheet and the aluminum row is at the side relative to the dual-cell module; a limiting buckle is provided on the inner wall of the side welding notch, and the aluminum row is squeezed by the limiting buckle to be fed and clamped on the battery holder, and the aluminum row is limited by the limiting buckle of structural recovery.

[0011] Furthermore, a wire groove is provided in the side welding notch, and a plurality of dual-cell modules connected in series are connected in sequence so that the wire grooves are connected in sequence to form a wiring harness groove.

[0012] Furthermore, the battery cell support is provided with a protective plate corresponding to the side welding notch, and the protective plate covers the open end of the side welding notch to cover and shield the aluminum bar and the wire trough, and the protective plate is flush with the open end of the side welding notch.

[0013] Furthermore, the cell series partition has an integrated plate base, and a bayonet is correspondingly arranged on the groove wall constituting the wire groove. When adjacent dual-cell modules are connected in series, the cell series partition is fixed by clamping the plate base through the bayonet, and the cell series partition is an insulating plate.

[0014] Furthermore, the battery box includes an aluminum alloy box body and an injection molded box cover, the soft-pack power battery module is located and installed in the aluminum alloy box body, and the injection molded box cover covers the soft-pack power battery module and the aluminum alloy box body; the bottom plate structure or the overall structure of the aluminum alloy box body is the heat dissipation box body of the battery box, the heat conductive splint and the exposed heat conductive plate body are integrally formed aluminum plates, and the exposed heat conductive plate body is in a horizontal structural form and fits in contact with the inner bottom surface of the aluminum alloy box body.

[0015] Furthermore, a heat dissipation structure is provided on the aluminum alloy box.

[0016] Furthermore, the heat dissipation structure includes a heat dissipation channel arranged in the bottom plate structure of the aluminum alloy box body, and a fluid heat exchange medium can flow into the heat dissipation channel.

[0017] Beneficial effects: The present invention introduces a cell bracket to participate in the assembly of soft-pack batteries. The dual-cell module formed after the soft-pack battery is embedded in the cell bracket has greatly enhanced mechanical strength due to the support provided by the bracket. The soft-pack power battery module formed in series greatly improves the stability of the soft-pack battery, thereby improving the safety of the soft-pack battery. Moreover, the dual-cell modules are directly connected in series through the bracket connector to form a soft-pack power battery module, which is extremely convenient to assemble and more efficient. After the cells are isolated by the cell series partition, the wrong placement of the copper busbar is avoided, thereby improving the assembly accuracy. The heat inside the soft-pack power battery module can be exported by using the thermal conductive splint, and then the heat is conducted to the heat dissipation box body of the battery box through the exposed thermal conductive plate body for dissipation, which can improve the heat dissipation efficiency and ensure the safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the overall structure of modularly assembled soft-pack power batteries;

[0019] Figure 2 A schematic diagram of the structural breakdown of a modularly assembled soft-pack power battery;

[0020] Figure 3 This is a schematic diagram of the structural decomposition of a soft-pack power battery module;

[0021] Figure 4 It is a structural schematic diagram of a dual-cell module and a cell series partition;

[0022] Figure 5 It is a schematic diagram of the structural decomposition of the dual-cell module;

[0023] Figure 6 It is a structural diagram of the aluminum alloy box. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] like Figure 1 , Figure 2 as well as Figure 3As shown, a modular assembled soft-pack power battery includes a soft-pack battery cell 1, a battery cell bracket 2, a bracket connector 3, a battery cell series partition 4, a heat-conducting clamp 5 and a battery box 6; the battery cell bracket 2 is a frame structure, one battery cell bracket 2 corresponds to two soft-pack battery cells 1, and the two soft-pack battery cells 1 are respectively embedded from the open frame openings at both ends of the battery cell bracket 2, so that the electrode sheet 7 of the soft-pack battery cell 1 is in contact with the aluminum row 8 on the battery cell bracket 2 for welding connection, forming a dual-cell module 10 that can be connected in series through the bracket connector 3 to form a soft-pack power battery module 9, and the welding position of the dual-cell module 10 is located on the side. By introducing the cell holder 2 to participate in the assembly of the soft-pack battery, the dual-cell module 10 formed after the soft-pack battery 1 is embedded in the cell holder 2 has greatly enhanced mechanical strength due to the support provided by the holder. The soft-pack power battery module 9 formed in series greatly improves the stability of the soft-pack battery, thereby improving the safety of the soft-pack battery. Moreover, the dual-cell module 10 is directly connected in series through the holder connector 3 to form the soft-pack power battery module 9, which is extremely convenient to assemble and more efficient.

[0026] Since the dual-cell modules 10 are first connected in series through the bracket connector 3 to form the soft-pack power battery module 9, and then the copper busbar 11 is assembled, in order to avoid the copper busbar 11 being placed in the wrong position when the copper busbar 11 is assembled to electrically connect the dual-cell modules 10 in series, Figure 3 As shown, the soft-pack cells 1 of the adjacent dual-cell modules 10 are electrically connected in series through the copper busbars 11, and the cell series partition 4 is arranged in the non-series area of ​​the adjacent dual-cell modules 10, so that the adjacent copper busbars 11 are isolated by the cell series partition 4. After isolation by the cell series partition 4, the placement error of the copper busbar 11 can be avoided, and the assembly accuracy is improved.

[0027] like Figure 3 As shown, the heat-conducting clamp 5 is clamped and arranged between the adjacent dual-cell modules 10 connected in series, so that the two side surfaces of the heat-conducting clamp 5 are respectively fitted with the soft-packed cells 1 of the dual-cell modules 10 in the adjacent positions; the heat-conducting clamp 5 has an exposed heat-conducting plate body 50 extending to the outside of the soft-packed power battery module 9, and the battery box 6 is correspondingly provided with a heat dissipation box body, and the exposed heat-conducting plate body 50 extends to the heat conduction contact with the heat dissipation box body to achieve heat conduction type heat dissipation of the heat generated inside the soft-packed power battery to the outside. The heat-conducting clamp 5 can be used to export the heat inside the soft-packed power battery module 9, and then the heat is conducted to the heat dissipation box body of the battery box 6 through the exposed heat-conducting plate body 50 for dissipation, which can improve the heat dissipation efficiency and ensure the safety of the battery.

[0028] like Figure 5As shown, the inner ring wall of the cell holder 2 is paved with an elastic pad 25, and the soft-packed cell 1 is pressed by the elastic pad 25 and embedded in the cell holder 2, and the two soft-packed cells 1 therein fit tightly. The soft-packed cell 1 can be pre-assembled in the cell holder 2 through the elasticity provided by the elastic pad 25, and the pre-positioning of the soft-packed cell 1 is ensured. After the electrode sheet 7 and the aluminum row 8 are welded, the positioning and assembly of the soft-packed cell 1 relative to the cell holder 2 is completed. The elastic pad 25 is preferably a silicone pad.

[0029] like Figure 2 and Figure 4 As shown, preferably, the bracket connector 3 is a screw, and the battery holder 2 is provided with a series connection hole 12 through which the screw is inserted; the battery holder 2 is provided with a plug 13 and a socket 14 at both ends of the open frame opening in the series connection direction, respectively, and when the dual-cell module 10 is connected in series through the bracket connector 3, the plug 13 is inserted into the corresponding socket 14 to realize series positioning, thereby improving the accuracy of assembly and positioning.

[0030] It is worth noting that in order to provide the convenience of welding, such as Figure 5 As shown, a side welding notch 15 is reserved on one side of the battery holder 2, and the aluminum row 8 is located in the side welding notch 15, so that the welding position of the electrode sheet 7 and the aluminum row 8 is at the side relative to the dual-cell module 10. The inner wall of the side welding notch 15 is provided with a limit buckle 16, and the aluminum row 8 squeezes the limit buckle 16 to feed and clamp on the battery holder 2, and the aluminum row 8 is limited by the limit buckle 16 of structural restoration. At the same time, in order to facilitate the connection of the wiring harness between the battery and the battery management system, as shown in FIG. Figure 4 Or as shown in Figure 5, a wire trough 17 is provided in the side welding notch 15, and a plurality of dual-cell modules 10 connected in series make the wire troughs 17 connected in sequence to form a wiring harness trough. The cell holder 2 is provided with a protective plate 18 corresponding to the side welding notch 15, and the protective plate 18 covers the open end of the side welding notch 15 to cover and shield the aluminum bar 8 and the wire trough 17, and the protective plate 18 is flush with the open end of the side welding notch 15. In addition, the protective plate 18 and the cell holder 2 are installed in a sliding manner, so that the joint can be more flush, thereby improving the regularity of the overall structure.

[0031] The cell series connection partition 4 has an integrated plate base 40, and a bayonet 19 is correspondingly arranged on the groove wall constituting the wire groove 17. When adjacent dual-cell modules 10 are connected in series, the cell series connection partition 4 is fixed by clamping the plate base 40 through the bayonet 19, which facilitates the installation of the cell series connection partition 4. At the same time, in order to further ensure safety, the cell series connection partition 4 is an insulating plate.

[0032] like Figure 2 and Figure 3As shown, the battery box 6 includes an aluminum alloy box body 61 and an injection molded box cover 62, the soft-pack power battery module 9 is located and installed in the aluminum alloy box body 61, and the injection molded box cover 62 covers the soft-pack power battery module 9 and the aluminum alloy box body 61; the bottom plate structure or the overall structure of the aluminum alloy box body 61 is the heat dissipation box body part of the battery box 6, the heat conductive clamping plate 5 and the exposed heat conductive plate body 50 are integrally formed aluminum plates, and the exposed heat conductive plate body 50 is in a horizontal structure and fits the inner bottom surface of the aluminum alloy box body 61.

[0033] The aluminum alloy box 61 can achieve heat dissipation. In order to further speed up the heat dissipation speed and improve the heat dissipation efficiency, as shown in FIG. Figure 6 As shown, the aluminum alloy box body 61 is provided with a heat dissipation structure 20. The heat dissipation structure 20 can use various heat dissipation parts, such as heat dissipation fins. In order to improve the heat dissipation effect, the embodiment provided by the present invention is as follows: the heat dissipation structure 20 includes a heat dissipation channel arranged in the bottom plate structure of the aluminum alloy box body 61, and a fluid heat exchange medium can be passed into the heat dissipation channel, and the heat exchange medium can be circulating cooling water or cooling air.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A modular assembled soft pack power battery, characterized in that: It comprises a soft-pack battery cell (1), a battery cell bracket (2), a bracket connector (3), a battery cell series partition (4), a heat-conducting clamp (5) and a battery box (6); The battery holder (2) is a frame structure, one battery holder (2) corresponds to two soft-pack battery cells (1), and the two soft-pack battery cells (1) are respectively inserted from the open frame openings at both ends of the battery holder (2), so that the electrode sheets (7) of the soft-pack battery cells (1) are in contact with the aluminum bars (8) on the battery holder (2) for welding connection, thereby forming a dual-cell module (10) that can be connected in series through the holder connector (3) to form a soft-pack power battery module (9), and the welding position of the dual-cell module (10) is located on the side; The soft-packed cells (1) of adjacent dual-cell modules (10) are electrically connected in series via copper bars (11), and the cell series connection partition (4) is arranged in a non-series connection area of ​​adjacent dual-cell modules (10) so that the adjacent copper bars (11) are isolated by the cell series connection partition (4); The heat-conducting clamp (5) is clamped and arranged between the adjacent dual-cell modules (10) connected in series, so that the two side surfaces of the heat-conducting clamp (5) are respectively in contact with the soft-packed cells (1) of the dual-cell modules (10) in adjacent positions; the heat-conducting clamp (5) has an exposed heat-conducting plate body (50) extending to the outside of the soft-packed power battery module (9); the battery box (6) is correspondingly provided with a heat-dissipating box body; the exposed heat-conducting plate body (50) extends to be in thermal conduction contact with the heat-dissipating box body, so as to realize heat-conducting heat dissipation by conducting the heat generated inside the soft-packed power battery to the outside.

2. A modular assembled soft-pack power battery according to claim 1, characterized in that: The inner ring frame wall of the battery cell support (2) is paved with an elastic pad (25), and the soft-package battery cell (1) is pressed against the elastic pad (25) and embedded in the battery cell support (2), and the two soft-package battery cells (1) therein are tightly fitted.

3. A modular assembled soft-pack power battery according to claim 1, characterized in that: The support connector (3) is a screw rod, and the battery support (2) is provided with a serial connection hole (12) through which the screw rod is inserted; the battery support (2) is provided with a plug (13) and a socket (14) at the two open frame openings at both ends in the serial connection direction, respectively; when the dual battery modules (10) are serially connected via the support connector (3), the plug (13) is inserted into the corresponding socket (14) to achieve serial connection positioning.

4. A modular assembled soft-pack power battery according to claim 1, characterized in that: A side welding notch (15) is reserved on one side of the battery holder (2), and the aluminum row (8) is located in the side welding notch (15), so that the welding position of the electrode sheet (7) and the aluminum row (8) is at the side relative to the dual battery module (10); a limiting buckle (16) is provided on the inner wall of the side welding notch (15), and the aluminum row (8) is pressed by the limiting buckle (16) to be fed and clamped on the battery holder (2), and the aluminum row (8) is limited by the limiting buckle (16) of structural recovery.

5. A modular assembled soft-pack power battery according to claim 4, characterized in that: A wire groove (17) is provided in the side welding notch (15), and a plurality of dual-cell modules (10) connected in series are connected in such a way that the wire grooves (17) are connected in sequence to form a wiring harness groove.

6. A modular assembled soft-pack power battery according to claim 5, characterized in that: The battery cell support (2) is provided with a protective plate (18) corresponding to the side welding notch (15); the protective plate (18) covers the open end of the side welding notch (15) to cover and shield the aluminum bar (8) and the wire trough (17); and the protective plate (18) is flush with the open end of the side welding notch (15).

7. A modular assembled soft-pack power battery according to claim 6, characterized in that: The cell-in-series partition (4) has an integrated plate base (40), and a bayonet (19) is correspondingly arranged on the groove wall constituting the wire groove (17). When adjacent dual-cell modules (10) are connected in series, the cell-in-series partition (4) is fixed by clamping the plate base (40) through the bayonet (19), and the cell-in-series partition (4) is an insulating plate.

8. The modular assembled soft-pack power battery according to claim 1, characterized in that: The battery box (6) comprises an aluminum alloy box body (61) and an injection molded box cover (62); the soft-pack power battery module (9) is located and installed in the aluminum alloy box body (61); the injection molded box cover (62) covers the soft-pack power battery module (9) and is closed with the aluminum alloy box body (61); the bottom plate structure or the overall structure of the aluminum alloy box body (61) is the heat dissipation box body of the battery box (6); the heat conducting clamping plate (5) and the exposed heat conducting plate body (50) are integrally formed aluminum plates; the exposed heat conducting plate body (50) is in a horizontal structural form and fits and contacts the inner bottom surface of the aluminum alloy box body (61).

9. A modular assembled soft-pack power battery according to claim 8, characterized in that: The aluminum alloy box (61) is provided with a heat dissipation structure (20).

10. A modular assembled soft-pack power battery according to claim 9, characterized in that: The heat dissipation structure (20) comprises a heat dissipation channel arranged in a bottom plate structure of an aluminum alloy box (61), and a fluid heat exchange medium can flow into the heat dissipation channel.

Images