Soft-pack power battery module

Abstract

The present invention provides a soft-pack power battery module, which may include: a housing; a soft-pack battery pack housed within the housing; the soft-pack battery pack including a plurality of battery cells extending along a first direction; a first tab and a second tab provided at each end of the battery cells along the first direction; the plurality of battery cells arranged in series along the first direction, with the first tab and the second tab between adjacent battery cells welded together to form an electrical connection portion, so that the plurality of battery cells can be electrically connected through the electrical connection portion; and a sampling mechanism provided on the electrical connection portion and electrically connected to the electrical connection portion to collect the voltage of the battery cells. The present invention provides a soft-pack power battery module that can improve the integration of the power system and thereby meet the requirements of high-rate charge and discharge.

Description

Technical Field

[0001] The invention relates to a soft-pack power battery module. Background Art

[0002] In recent years, new energy vehicles have developed rapidly, but many key indicators of the power batteries used in new energy vehicles have not yet met market expectations, such as high-rate charging and discharging time, cruising range, and safety.

[0003] Specifically, existing power battery systems include a housing and power battery modules housed within it. These modules are typically fixed in length, with common lengths ranging from 355mm to 590mm. Each battery system contains numerous modules, resulting in complex high- and low-voltage connections, low overall package efficiency, and high weight and cost. Furthermore, due to the module's structural characteristics, module thermal management efficiency is low, making it difficult to adapt to high-rate charge and discharge requirements.

[0004] Therefore, it is necessary to propose a soft-pack power battery module to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a soft-pack power battery module, which can improve the integration of the power battery system and meet the high-rate charge and discharge requirements of the system.

[0006] The above-mentioned objectives of the present invention can be achieved by adopting the following technical solutions: a soft-pack power battery module, comprising: a shell; a soft-pack battery pack, which is accommodated in the shell; the soft-pack battery pack includes a plurality of battery cells extending along a first direction; the battery cells are respectively provided with a first pole tab and a second pole tab at both ends along the first direction; the plurality of battery cells are arranged in series along the first direction, and the first pole tab and the second pole tab between adjacent battery cells are welded to form an electrical connection part; so that the plurality of battery cells can be electrically connected through the electrical connection part; a sampling mechanism, which is provided on the electrical connection part, and the sampling mechanism is electrically connected to the electrical connection part so as to be able to collect the voltage of the battery cells.

[0007] As a preferred embodiment, the soft-pack battery pack includes a plurality of battery cell units; the battery cell unit includes a plurality of battery cells stacked along the thickness direction.

[0008] As a preferred embodiment, a metal piece is provided between adjacent battery cells; and the first electrode tab and the second electrode tab between adjacent battery cells are welded to opposite sides of the metal piece.

[0009] As a preferred embodiment, there are multiple sampling mechanisms, multiple battery cells and multiple electrical connection parts; multiple sampling mechanisms correspond to multiple electrical connection parts; each sampling mechanism is electrically connected to the corresponding electrical connection part; multiple sampling mechanisms are connected by wires so that several battery cells can be connected in parallel.

[0010] As a preferred embodiment, the sampling mechanism includes a first metal sheet and a second metal sheet arranged opposite to each other; one end of the first metal sheet is connected to the second metal sheet; an opening for the electrical connection part to pass through is formed between the other ends of the first metal sheet and the second metal sheet; so that the electrical connection part can pass through the opening between the first metal sheet and the second metal sheet.

[0011] As a preferred embodiment, a protrusion is provided on the first metal sheet and / or the second metal sheet; the protrusion can abut against the electrical connection part when the electrical connection part is passed between the first metal sheet and the second metal sheet, so that the sampling mechanism can be clamped on the electrical connection part.

[0012] As a preferred embodiment, an insulating bracket is provided between adjacent battery core units; and the sampling mechanism is provided on the insulating bracket.

[0013] As a preferred embodiment, a liquid cooling mechanism is integrated on the bottom wall of the shell; the insulating bracket is connected to the bottom wall of the shell; so that the liquid cooling mechanism can dissipate heat from the electrical connection part through the insulating bracket.

[0014] As a preferred embodiment, a groove is provided on the insulating bracket, and the bottom of the groove is close to the liquid cooling mechanism; the sampling mechanism is embedded in the groove.

[0015] As a preferred embodiment, a heat conducting member is further provided on the insulating bracket; the heat conducting member is arranged around the outside of the groove and extends toward the liquid cooling mechanism.

[0016] The soft-pack power battery module provided herein has the following beneficial effects: The soft-pack power battery module described in the embodiments of the present application comprises a soft-pack battery pack comprising a plurality of battery cells extending along a first direction and arranged in series along the first direction, with the first and second tabs between adjacent battery cells welded together to form an electrical connection, thereby electrically connecting the battery cells via the electrical connection. This allows the soft-pack battery module to integrate multiple battery cells extending along the length of the battery cells. Conventional soft-pack battery modules generally only integrate a single battery cell along the length. Compared to conventional electrical connections between power battery modules, the power battery module described in the embodiments of the present application can eliminate the need for multiple end plates, busbars, and other components, simplifying the process and significantly improving the integration efficiency of the power battery module. This can further meet the requirements of high-rate charge and discharge. Furthermore, a sampling mechanism is clamped onto the electrical connection, allowing the sampling mechanism and the electrical connection to share space, further improving the integration efficiency of the power battery module. Therefore, the present invention provides a soft-pack power battery module, which can improve the integration of the power system and thus meet the demand for high-rate charging and discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic structural diagram of a soft-pack power battery module provided in one embodiment of the present invention;

[0019] Figure 2 A cross-sectional view of a soft-pack power battery module provided in one embodiment of the present invention;

[0020] Figure 3 A schematic structural diagram of a battery cell provided in one embodiment of the present invention;

[0021] Figure 4 A schematic diagram of welding a first electrode tab and a second electrode tab provided in one embodiment of the present invention;

[0022] Figure 5 A schematic diagram of another welding process of a first electrode tab and a second electrode tab provided in one embodiment of the present invention;

[0023] Figure 6 A schematic diagram of a sampling mechanism provided in one embodiment of the present invention;

[0024] Figure 7A schematic diagram of an insulating bracket provided in one embodiment of the present invention;

[0025] Figure 8 A schematic diagram of the connection of a sampling mechanism provided in one embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 13. Shell; 14. Bottom plate; 15. Battery cell; 17. Battery cell unit; 19. First tab; 21. Second tab; 22. Main body; 25. Sampling mechanism; 27. Metal part; 31. Wire; 32. Insulating bracket; 33. First metal sheet; 35. Second metal sheet; 37. Opening; 43. Raised portion; 45. Groove; 47. Thermal conductor. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] See also Figures 1 to 8 A soft-pack power battery module provided in one embodiment of the present application may include: a housing 13; a soft-pack battery pack housed in the housing 13; the soft-pack battery pack including a plurality of battery cells 15 extending along a first direction; a first tab 19 and a second tab 21 provided at both ends of the battery cells 15 along the first direction; the plurality of battery cells 15 are arranged in series along the first direction, and the first tab 19 and the second tab 21 between adjacent battery cells 15 are welded to form an electrical connection portion, so that the plurality of battery cells 15 can be electrically connected through the electrical connection portion; a sampling mechanism 25 provided on the electrical connection portion; and the sampling mechanism 25 is electrically connected to the electrical connection portion to collect the voltage of the battery cells 15.

[0030] It can be seen from the above technical solutions that the soft-pack power battery module described in the embodiment of the present application is provided with a soft-pack battery pack, which includes a plurality of battery cells 15; the battery cells 15 extend along a first direction and the plurality of battery cells 15 are arranged in series along the first direction, and the first pole tabs 19 and the second pole tabs 21 between adjacent battery cells 15 are welded to form an electrical connection portion; so that the plurality of battery cells 15 can be electrically connected through the electrical connection portion. In this way, a plurality of battery cells 15 extending along the length direction of the battery cells 15 can be integrated into the soft-pack battery module. In contrast, the soft-pack battery module in the prior art generally only integrates one battery cell 15 in its length direction. Compared with the electrical connection between power battery modules in the prior art, the power battery module described in the embodiment of the present application can reduce a plurality of end plates, busbars and other parts, thereby simplifying the process and greatly improving the integration efficiency of the power battery module; thus meeting the requirements of high-rate charging and discharging. Furthermore, the sampling mechanism 25 is provided on the electrical connection portion, and the sampling mechanism 25 is electrically connected to the electrical connection portion so as to collect the voltage of the battery cell 15 ; in this way, the sampling mechanism 25 and the electrical connection portion share a space, thereby further improving the integration efficiency of the power battery module.

[0031] In this embodiment, the housing 13 is generally hollow. This hollow portion forms an inner cavity for housing the soft-pack battery module. Furthermore, the housing 13 includes a top plate, a bottom plate, and side plates disposed between the top and bottom plates. The inner cavity is formed between the top, bottom, and side plates.

[0032] In this embodiment, the soft pack battery pack is housed in the shell 13. Specifically, the soft pack battery pack is housed in the inner cavity of the shell 13. Furthermore, the soft pack battery pack includes a plurality of battery cells 15 extending along a first direction. The first direction is also the length direction of the battery cell 15. The battery cell 15 is provided with a first tab 19 and a second tab 21 at both ends along the first direction. For example, Figure 3 As shown, the battery cell 15 includes a main body 22 and a first tab 19 and a second tab 21 provided at both ends of the main body 22. Figure 3 As shown, the first tab 19 can be located at the left end of the main body 22. The second tab 21 is located at the right end of the main body 22. Of course, the first tab 19 is not limited to being located at the left end of the main body 22, and the second tab 21 is not limited to being located at the right end of the main body 22. The first tab 19 can also be located at the right end of the main body 22. The second tab 21 is located at the left end of the main body 22, which is not specified in this application.

[0033] In this embodiment, a plurality of battery cells 15 are arranged in series along a first direction, and the first tabs 19 and the second tabs 21 between adjacent battery cells 15 are welded to form an electrical connection portion, so that the plurality of battery cells 15 can be electrically connected through the electrical connection portion. Figure 1As shown, the two battery cells 15 are arranged in series along the first direction. Furthermore, the two battery cells 15 are, for example, a first battery cell 15 located on the left and a second battery cell 15 located on the right. The right end of the first battery cell 15 is a second pole tab 21. The left end of the second battery cell 15 is a first pole tab 19. The second pole tab 21 at the right end of the first battery cell 15 faces the first pole tab 19 at the left end of the second battery cell 15 and is welded to form an electrical connection portion, so that the first battery cell 15 and the second battery cell 15 can be connected in series through the electrical connection portion. The electrical connection portion may include the first pole tab 19, the second pole tab 21, and the welding area between the first pole tab and the second pole tab. In this way, multiple battery cells 15 can be integrated along the length direction of the battery cell 15 in the shell 13. However, the soft-pack battery module in the prior art generally only integrates one battery cell 15 in its length direction. Therefore, compared with the electrical connection between power battery modules in the prior art, the power battery module described in the embodiment of the present application can reduce multiple end plates, busbars and other parts, thereby simplifying the process and greatly improving the integration efficiency of the power battery module.

[0034] Furthermore, the soft pack battery pack includes a plurality of battery cells 17. The battery cell unit 17 includes a plurality of battery cells 15 stacked along the thickness direction. Specifically, for example, Figure 1 As shown, the soft pack battery pack includes two battery cell units 17. The two battery cell units 17 are arranged in series along a first direction.

[0035] In one embodiment, a metal piece 27 is provided between adjacent battery cells 15. The first tab 19 and the second tab 21 between adjacent battery cells 15 are welded to opposite sides of the metal piece 27. Thus, the adjacent battery cells 15 can be electrically connected through the metal piece 27. Of course, the first tab 19 and the second tab 21 between adjacent battery cells 15 are not limited to being welded to opposite sides of the metal piece 27, but can also be directly welded. That is, Figure 4 As shown, the first tabs 19 and the second tabs 21 between adjacent battery cells 15 are directly welded, thereby achieving electrical connection between adjacent battery cells 15 .

[0036] Furthermore, the adjacent battery cells 15 may be two battery cells 15. The two battery cells 15 are respectively located in adjacent battery cell units 17. Or the adjacent battery cells 15 may be more than two battery cells 15. For example, Figure 5 As shown, four adjacent battery cells 15 are welded to the same metal piece 27 .

[0037] In this embodiment, the sampling mechanism 25 is disposed on the electrical connection portion. The sampling mechanism 25 is electrically connected to the electrical connection portion to collect the voltage of the battery cell 15. Because the sampling mechanism 25 is disposed on the electrical connection portion, the sampling mechanism 25 and the electrical connection portion share space within the housing 13, thereby preventing the sampling mechanism 25 from occupying space within the housing 13 outside the electrical connection portion, thereby improving the integration efficiency of the power battery module.

[0038] In one embodiment, the sampling mechanism 25 includes a first metal sheet 33 and a second metal sheet 35 disposed opposite to each other. Figure 6 As shown, the first metal sheet 33 and the second metal sheet 35 both extend in the vertical direction. The first metal sheet 33 may be located on the left side of the second metal sheet 35. Of course, the first metal sheet 33 is not limited to being located on the left side of the second metal sheet 35, but may also be located on the right side of the second metal sheet 35, which is not specified in this application.

[0039] Furthermore, one end of the first metal sheet 33 is connected to one end of the second metal sheet 35. Figure 6 As shown, the lower ends of the first metal sheet 33 and the second metal sheet 35 are connected. Furthermore, an opening 37 for the power supply connection portion to pass through is formed between the other ends of the first metal sheet 33 and the second metal sheet 35; so that the power supply connection portion can pass through the opening 37 between the first metal sheet 33 and the second metal sheet 35. For example, Figure 6 As shown, openings 37 are formed on the upper ends of the first metal sheet 33 and the second metal sheet 35 .

[0040] Furthermore, a protrusion 43 is provided on the first metal sheet 33 and / or the second metal sheet 35. Figure 6 As shown, the first metal sheet 33 is provided with three protrusions 43 along its extension direction. The three protrusions 43 are spaced apart on the first metal sheet 33. The second metal sheet 35 is provided with three protrusions 43 along its extension direction. The three protrusions 43 are spaced apart on the second metal sheet 35. The three protrusions 43 on the first metal sheet 33 are respectively opposite to the three protrusions 43 on the second metal sheet 35.

[0041] Furthermore, the protrusion 43 can abut against the electrical connection portion when the electrical connection portion is inserted between the first metal sheet 33 and the second metal sheet 35, thereby clamping the sampling mechanism 25 on the electrical connection portion. Because the first metal sheet 33 and the second metal sheet 35 are elastic, the first metal sheet 33 can rotate relative to the second metal sheet 35, thereby allowing the electrical connection portion to pass through the opening 37 and between the first metal sheet 33 and the second metal sheet 35, and allowing the protrusion 43 to abut against the electrical connection portion, thus clamping the sampling mechanism 25 on the electrical connection portion.

[0042] In one embodiment, an insulating bracket 32 ​​is provided between adjacent battery cells 17. The sampling mechanism 25 is disposed on the insulating bracket 32. Because the insulating bracket 32 ​​is insulating, the sampling mechanism 25 disposed on the insulating bracket 32 ​​can be supported by the insulating bracket 32 ​​on the one hand, and can also ensure insulation between the electrical connection portion and the housing 13 on the other hand.

[0043] In one embodiment, a liquid cooling mechanism is integrated on the bottom wall of the housing 13. Figure 7 As shown, the liquid cooling mechanism is integrated into the bottom plate of the housing 13. Specifically, the liquid cooling mechanism may include a liquid cooling tube disposed on the bottom plate of the housing 13. The liquid cooling tube is used to circulate a liquid cooling fluid. As the liquid cooling fluid circulates within the liquid cooling tube, it cools the bottom plate of the housing 13, thereby cooling the soft-pack battery pack within the interior of the housing 13.

[0044] In another embodiment, a liquid cooling mechanism is provided on the outside of the bottom wall of the housing 13. Specifically, for example, the liquid cooling mechanism is provided on the bottom wall of the battery system case, and the soft-pack power battery module described in the embodiment of the present application is placed on the liquid cooling mechanism. Thus, the liquid cooling fluid can cool the bottom wall of the housing 13 through the liquid cooling mechanism, thereby cooling the soft-pack battery pack and electrical connection parts within the inner cavity of the housing 13.

[0045] Furthermore, the insulating bracket 32 ​​is connected to the bottom wall of the shell 13. Specifically, a thermally conductive filling layer is provided between the bottom surface of the insulating bracket 32 ​​and the surface of the shell 13. The thermally conductive filling layer may be, for example, a thermally conductive adhesive, which may enhance the heat conduction between the insulating bracket 32 ​​and the bottom plate of the shell 13 and improve the firmness of the fixation between the shell 13 and the insulating bracket 32. The liquid cooling mechanism can then dissipate heat from the electrical connection portion through the insulating bracket 32. This prevents the temperature of the first pole tab 19 and the second pole tab 21 from rising during high-rate charge and discharge, thereby preventing the material packaging strength of the seal between the first pole tab 19 and the second pole tab 21 and the main body 22 of the battery cell 15 from decreasing, or even damaging the battery cell seal, leading to safety risks such as leakage of the battery cell 15, thereby improving the safety of the battery cell during the high-rate charge and discharge stage. Furthermore, the material of the insulating bracket 32 ​​may be, for example, plastic, such as highly thermally conductive PA, PC, etc.

[0046] Furthermore, a groove 45 is provided on the insulating bracket 32. The bottom of the groove 45 is close to the liquid cooling mechanism. The sampling mechanism 25 is embedded in the groove 45. The sampling mechanism 25 is embedded in the groove 45. For example, Figure 7 As shown, the groove 45 on the insulating bracket 32 ​​extends toward the bottom plate of the housing 13. In this way, the sampling mechanism 25 can be embedded in the groove 45, and the sampling mechanism 25 can be close to the liquid cooling mechanism in the bottom plate of the housing 13, thereby accelerating heat conduction between the sampling mechanism 25 and the bottom plate of the housing 13.

[0047] In one embodiment, a heat conducting member 47 is further provided on the insulating bracket 32. The heat conducting member 47 is arranged around the outside of the groove 45 and extends toward the liquid cooling mechanism. Figure 7 As shown, the heat conducting member 47 is U-shaped. The groove 45 is located within the U-shaped heat conducting member 47. Thus, the heat conducting member 47 can accelerate heat conduction between the sampling mechanism 25 and the bottom plate of the housing 13. Of course, the heat conducting member 47 is not limited to a U-shape and can also have other shapes, such as a V-shape, which is not specified in this application. Furthermore, the heat conducting member 47 can be, for example, an aluminum sheet.

[0048] Furthermore, a temperature sensor is provided on the insulating bracket 32. The temperature sensor is used to detect the temperature of the first tab 19 and / or the second tab 21. Specifically, the temperature sensor can be placed on the sampling mechanism 25. Alternatively, the temperature sensor can be placed outside the sampling mechanism 25, which is not specified in this application.

[0049] Furthermore, there are multiple sampling mechanisms 25. For example, Figure 8 As shown, there are 12 sampling mechanisms 25. Figure 2 As shown, multiple sampling mechanisms 25 are arranged perpendicular to the first direction. There are multiple battery cells 15. There are multiple electrical connection parts; multiple sampling mechanisms 25 correspond to multiple electrical connection parts; each sampling mechanism 25 is electrically connected to the corresponding electrical connection part; multiple sampling mechanisms 25 are connected by wires 31 so that multiple battery cells 15 can be connected in parallel. Figure 8 As shown, every three sampling mechanisms 25 in the 12 sampling mechanisms are connected via a wire 31 , thereby enabling the battery cells 15 electrically connected to the sampling mechanisms 25 to be connected in parallel via the sampling mechanisms 25 .

[0050] Furthermore, the battery cells 17 in the soft-pack battery pack can be connected in parallel in the following two ways:

[0051] The first method is to connect the cells 15 in adjacent cell units 17 in parallel first and then in series. Specifically, the cells 15 in adjacent cell units 17 can be welded to the same metal member 27. For example, Figure 5 As shown, the four battery cells 15 in adjacent battery cell units 17 are welded to the same metal part 27 , so that the two battery cells 15 in each battery cell unit 17 are first connected in parallel through the metal part 27 , and then the two battery cell units 17 are connected in series through the metal part 27 .

[0052] The second method is to connect the cells 15 in adjacent cell units 17 in series first and then in parallel. Specifically, the cells 15 in adjacent cell units 17 can be connected in series in pairs. Then, the cells 15 connected in series in pairs are connected in parallel through the sampling mechanism 25. Specifically, for example, Figure 8As shown, there are 12 sampling mechanisms 25. Each sampling mechanism 25 is clamped on the electrical connection portion between two battery cells 15 connected in series. And every three sampling mechanisms 25 are connected in parallel through wires 31, thus achieving parallel connection between the battery cells 15 connected in series.

[0053] It should be noted that, in the description of this application, the terms "first," "second," etc., are used solely for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, nor should they be understood to indicate or imply relative importance. Furthermore, in the description of this application, unless otherwise specified, "plurality" means two or more.

[0054] It should be understood that the above description is for illustrative purposes only and is not intended to be limiting. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the preceding claims and the full scope of equivalents to which such claims are entitled. For the purpose of completeness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein from the preceding claims is not intended to be a disclaimer of such subject matter, nor should it be considered that the applicants did not consider such subject matter to be part of the disclosed subject matter.

Claims

1. A soft pack power battery module, characterized in that: It includes: case; A soft-pack battery pack is housed in the housing; the soft-pack battery pack includes a plurality of battery cells extending along a first direction; The battery cell is provided with a first electrode tab and a second electrode tab at both ends along the first direction, respectively; the battery cells are arranged in series along the first direction, and the first electrode tab and the second electrode tab between adjacent battery cells are welded to form an electrical connection portion; so that the battery cells can be electrically connected through the electrical connection portion; a sampling mechanism, which is disposed on the electrical connection portion and is electrically connected to the electrical connection portion so as to be able to collect the voltage of the battery cell; The soft-pack battery pack includes several battery cell units; an insulating bracket is arranged between adjacent battery cell units, the insulating bracket is connected to the bottom wall of the shell, a groove and a heat conductor are provided on the insulating bracket, the sampling mechanism is embedded in the groove, a liquid cooling mechanism is integrated on the bottom wall of the shell, and the bottom of the groove is close to the liquid cooling mechanism; the heat conductor is arranged around the outside of the groove and extends toward the liquid cooling mechanism, and the liquid cooling mechanism can form a heat transfer path through the insulating bracket, the heat conductor, the sampling mechanism and the electrical connection part to dissipate heat from the electrical connection part.

2. The soft-pack power battery module according to claim 1, characterized in that: The battery cell unit includes a plurality of battery cells stacked along a thickness direction.

3. The soft-pack power battery module according to claim 1 or 2, characterized in that: A metal piece is provided between adjacent battery cells; the first electrode tab and the second electrode tab between adjacent battery cells are welded to opposite sides of the metal piece.

4. The soft-pack power battery module according to claim 2, characterized in that: There are multiple sampling mechanisms, multiple battery cells and multiple electrical connection parts; the multiple sampling mechanisms correspond to the multiple electrical connection parts; each sampling mechanism is electrically connected to the corresponding electrical connection part; the multiple sampling mechanisms are connected by wires so that several battery cells can be connected in parallel.

5. The soft-pack power battery module according to claim 1, characterized in that: The sampling mechanism includes a first metal sheet and a second metal sheet arranged opposite to each other; one end of the first metal sheet is connected to the second metal sheet; an opening for the electrical connection part to pass through is formed between the other ends of the first metal sheet and the second metal sheet; so that the electrical connection part can pass through the opening between the first metal sheet and the second metal sheet.

6. The soft-pack power battery module according to claim 5, characterized in that: A protrusion is provided on the first metal sheet and / or the second metal sheet; the protrusion can abut against the electrical connection part when the electrical connection part is inserted between the first metal sheet and the second metal sheet, so that the sampling mechanism can be clamped on the electrical connection part.

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