Pouch battery cell module and battery pack provided with same

Abstract

The application relates to the technical field of battery manufacturing, and provides a soft package battery cell module and a battery pack provided with the same. The soft package battery cell module comprises a battery cell group and tab supports arranged on both sides of the battery cell group in the width direction; the battery cell group is formed by stacking a plurality of soft package battery cells in sequence, and both sides of the battery cell group in the width direction correspond to the tabs of the soft package battery cells; each tab support comprises a base plate and a collection assembly, the base plate is provided with a fixing part for fixing a plurality of tabs on the same side, the collection assembly is arranged on the base plate, and a plurality of temperature collection units of the collection assembly are connected to the tabs one by one. The soft package battery cell module can improve the accuracy of battery cell temperature collection and help improve the use quality of the battery pack.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a pouch cell module and a battery pack having thereon. Background Technology

[0002] Currently, in the application of pouch cells, to meet the requirements of battery pack capacity and output capability, multiple pouch cells are usually connected in parallel and then connected by a battery pack to form a pouch cell assembly. During charging and discharging, when the operating current is large, the temperature of the battery pack is higher than the temperature of the cell itself due to the superposition of currents in the parallel connection.

[0003] In related technologies, when collecting cell temperature data, the temperature sensor is placed directly on the battery pack. However, the temperature collected by the sensor is not the actual cell temperature; in fact, it may be higher than the cell temperature. This prevents the battery management system from accurately obtaining the cell temperature, which in turn affects the charging and discharging efficiency and safety protection mechanisms of the battery pack, thus hindering the improvement of the battery pack's overall performance. Utility Model Content

[0004] In view of this, this application aims to propose a pouch cell module to improve the quality of battery pack use.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0006] A pouch cell module includes a cell group formed by stacking a plurality of pouch cells in sequence, and tab supports disposed on both sides of the cell group in the width direction.

[0007] The two sides of the cell assembly in the width direction are respectively corresponding to the tabs of each of the pouch cells;

[0008] Each of the electrode holders includes a base plate and a data acquisition component disposed on the base plate. The base plate is provided with a fixing part for fixing several electrodes on the same side, and several temperature acquisition units in the data acquisition component are connected to each electrode in a corresponding manner.

[0009] Furthermore, the tab support includes an upper connecting plate and a lower connecting plate disposed on the substrate along the height direction of the battery cell assembly. Both the upper connecting plate and the lower connecting plate extend toward one side of the battery cell assembly. The upper connecting plate is located above each tab on the same side, and the lower connecting plate is located below each tab on the same side. The acquisition component is connected to an FPC board for each temperature acquisition unit. The FPC board is disposed on the bottom wall of the upper connecting plate, or the FPC board is disposed on the top wall of the lower connecting plate.

[0010] Furthermore, the temperature acquisition unit and the electrode tab are connected by a fastening assembly.

[0011] Furthermore, the temperature acquisition unit is annular, and the tab is provided with a connection hole; the fastening assembly includes a bolt that passes through the temperature acquisition unit and the connection hole in sequence, and a nut that is screwed onto the side of the tab away from the temperature acquisition unit.

[0012] Furthermore, along the length direction of the battery cell assembly, the distance L between the edge of the projection profile of the connection hole and the edge of the projection profile of the electrode tab satisfies: L≥1.6mm.

[0013] Furthermore, it also includes end plates disposed at both ends of the length direction of the battery cell assembly, and a plurality of support plates are connected between the two end plates; along the height direction of the battery cell assembly, the top of each upper connecting plate is correspondingly connected to the support plate, and the bottom of each lower connecting plate is correspondingly connected to the support plate.

[0014] Furthermore, each of the support plates includes a main body portion arranged along the length direction of the battery cell assembly, and mounting portions provided at both ends of the main body portion, wherein each mounting portion is detachably connected to the corresponding end plate.

[0015] Compared with related technologies, this application has the following advantages:

[0016] (1) The soft-pack battery cell module described in this application facilitates the support and fixation of the battery cell group's tabs through the setting of the tab bracket and fixing part. Furthermore, by directly connecting the temperature acquisition unit to each tab, it helps to directly obtain the temperature of the tab. Compared with the temperature of the battery cell, it can improve the accuracy of the battery cell temperature acquisition, thereby facilitating better control of the charging and discharging efficiency and safety mechanism of the battery pack, and thus improving the quality of the battery pack.

[0017] (2) The upper and lower connecting plates facilitate the processing and manufacturing of the tab bracket and help install the FPC board. Placing the FPC board on the bottom wall of the upper connecting plate or the top wall of the lower connecting plate helps protect the FPC board and facilitates the connection of the acquisition components and temperature acquisition unit with the FPC, which is beneficial for design implementation.

[0018] (3) By setting the fastening components, it is easy to ensure the assembly stability of the temperature acquisition unit and the tab, avoid the connection failure caused by shaking during the use of the battery pack, and facilitate the assembly of the temperature acquisition unit.

[0019] (4) By making the temperature acquisition unit ring-shaped and providing connection holes on the tab, it is easy to assemble the temperature acquisition unit onto the tab with bolts and nuts. Furthermore, by making the fastening components include bolts and nuts, it is easy to process and manufacture, which is helpful for design and implementation.

[0020] (5) By limiting the distance L between the edge of the projection contour of the connection hole in the length direction of the battery pack and the edge of the projection contour of the electrode, the following conditions are met: L≥1.6mm. This helps to ensure the structural strength of the electrode and the connection stability between the temperature acquisition unit and the electrode, which is convenient for design and implementation.

[0021] (6) The support plate facilitates the connection between the end plate and the tab bracket, and the support plate can connect the end plate and the tab bracket into one unit, thereby facilitating better support and fixation of the battery pack. The structure is simple and easy to design and implement.

[0022] (7) By making the support plate include a main body and an installation part, and the installation part and the end plate are detachably connected, the structural strength can be improved with the cooperation of the main body and the installation part, while the main body can be made into a long strip shape, so that the area of ​​the support plate can be reduced as much as possible, thus achieving the purpose of weight reduction.

[0023] This application also proposes a battery pack, including a lower housing and a pouch cell module as described above disposed in the lower housing.

[0024] Furthermore, the soft-pack battery cell module consists of two layers arranged vertically; the battery pack also includes a bottom liquid cooling plate disposed at the bottom of the lower soft-pack battery cell module, a middle liquid cooling plate disposed between the two layers of soft-pack battery cell modules, and a top liquid cooling plate disposed at the top of the upper soft-pack battery cell module.

[0025] Furthermore, both the bottom liquid cooling plate and the middle liquid cooling plate are made of profiles, the profiles are provided with flow channels, and the upper and lower surfaces of the profiles are both flat; and / or, the bottom plate of the lower housing is made of the bottom liquid cooling plate, and the lower housing is integrally formed.

[0026] The battery pack described in this application, through the setting of the soft-pack cell module as described above, can directly obtain the temperature of the tabs. Compared with collecting the temperature of the battery pads, it can improve the accuracy of cell temperature acquisition, thereby facilitating better control of the charging and discharging efficiency and safety mechanism of the battery pack, and thus improving the quality of use of the battery pack.

[0027] Furthermore, by arranging two layers of pouch cell modules sequentially within the battery pack, the energy density of the battery pack is improved. The bottom, middle, and top liquid cooling plates allow for cooling of both the top and bottom surfaces of each pouch cell module, enhancing cooling efficiency and improving the overall quality of the battery pack. Moreover, by using profiles for both the bottom and middle liquid cooling plates, with flat upper and lower surfaces, manufacturing is easier. This not only cools both the top and bottom modules but also replaces the pressure plates used in traditional technologies, reducing the number of components. The pouch cell modules can be welded before being placed in the casing without affecting the production process. The flow channel design increases the heat exchange time between the coolant and the cells, further improving cooling performance. Additionally, integrating the bottom liquid cooling plate into the lower casing saves space within the battery pack, contributing to increased energy density and facilitating design and implementation. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of the soft-pack battery module described in the embodiments of this application;

[0030] Figure 2 for Figure 1 Enlarged view of point A;

[0031] Figure 3 This is a partial structural schematic diagram of the soft-pack battery module described in an embodiment of this application;

[0032] Figure 4 for Figure 3 Enlarged view of point B;

[0033] Figure 5 This is a partial structural diagram of the tab of the soft-pack battery module described in the embodiments of this application;

[0034] Figure 6 This is an exploded view of the battery pack described in the embodiments of this application;

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Battery cell assembly; 101. Electrode tabs;

[0037] 2. Electrode bracket; 201. Base plate; 202. Upper connecting plate; 203. Lower connecting plate;

[0038] 3. Temperature acquisition unit; 4. Fixing part; 5. FPC board; 6. Fastening assembly; 7. Connecting hole; 8. End plate;

[0039] 9. Support plate; 901. Main body; 902. Mounting part; 903. Snap-fit ​​hole;

[0040] 10. Snap-fit ​​protrusion; 11. Lower housing; 12. Bottom liquid cooling plate; 13. Middle liquid cooling plate; 14. Top liquid cooling plate. Detailed Implementation

[0041] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0043] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0045] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0047] The first aspect of this application provides a pouch cell module, which is used in a battery pack. It is mainly used to cooperate with the relevant structures in the battery pack to store and release electrical energy. The pouch cell module in this embodiment, with its innovative structural design, can more accurately obtain the temperature of the tabs, which helps the battery management system of the battery pack to control the charging and discharging of the battery and its safety, thereby improving the quality of the battery pack.

[0048] In related technologies, in the application of pouch cells, to meet the requirements of battery pack capacity and output capability, multiple pouch cells are usually connected in parallel and then connected by a battery pack to form a pouch cell assembly. During charging and discharging, when the operating current is large, the temperature of the battery pack is higher than the temperature of the cell itself due to the superposition of currents in the parallel connection.

[0049] Currently, when collecting cell temperature data, the temperature sensor is placed directly on the battery pack. However, the temperature measured by the sensor in this way is not the actual cell temperature; in fact, it may be higher than the cell's actual temperature. This makes it impossible for the battery management system to accurately obtain the cell temperature, which in turn affects the battery pack's charging and discharging efficiency and safety protection mechanisms, thus hindering the improvement of the battery pack's overall performance.

[0050] In view of this, in order to overcome the shortcomings of related technologies, the soft-pack battery module of this embodiment combines... Figures 1 to 5 As shown, the overall design includes a battery cell assembly 1 and a tab support 2.

[0051] The battery cell assembly 1 is formed by stacking several flexible battery cells sequentially, and the tab support 2 is located on both sides of the width direction of the battery cell assembly 1. The tabs 101 of each flexible battery cell are respectively arranged on both sides of the width direction of the battery cell assembly 1. Each tab support 2 includes a substrate 201 and a data acquisition component. The data acquisition component is located on the substrate 201. The substrate 201 is provided with a fixing part 4 for fixing several tabs 101 on the same side, and several temperature acquisition units 3 in the data acquisition component are connected to each tab 101 in a one-to-one correspondence.

[0052] Therefore, the tab bracket 2 and the fixing part 4 facilitate the support and fixing of the tabs 101 of the cell pack 1. By directly connecting the temperature acquisition unit 3 to each tab 101, it is helpful to directly obtain the temperature of the tab 101. Compared with the temperature of the battery pack, the accuracy of cell temperature acquisition can be improved, which is conducive to better control of the charging and discharging efficiency and safety mechanism of the battery pack, and thus improves the quality of battery pack use.

[0053] Based on the above general introduction, specifically, as an exemplary implementation form, for the pouch cell in this embodiment, still in conjunction with Figures 1 to 5 as shown therein, the pouch cell generally includes a cell main body and tabs 101 disposed on both sides of the cell main body in the length direction.

[0054] The large surfaces of the above cell main bodies are arranged opposite to each other and stacked in sequence to form a cell group 1. The tabs 101 of each pouch cell are arranged on both sides along the width direction of the cell group 1, and the tabs 101 on the same side are correspondingly connected based on the design requirements of the cell group 1 and communicated through conductive members.

[0055] In specific implementation, through holes for the tabs 101 to pass through are usually opened on the corresponding tab bracket 2 at positions corresponding to the tabs 101. After passing through the through holes, the tabs 101 are connected to the tabs 101 of the adjacent pouch cell according to the design requirements of the cell group 1, and finally connected through the conductive members. At this time, the connection of the tabs 101 on the same side and the connection of the conductive members can refer to the connection of the tabs 101 of the pouch cells and the connection of the conductive members in the existing battery pack, which will not be repeated here.

[0056] The above fixing portion 4 may be arranged in a "square" shape, for example. The hole in the middle of each fixing portion 4 corresponds to the through hole on the tab bracket 2 for the tab 101 to pass through. After the tab 101 passes through the fixing portion 4, the adjacent tabs 101 are bent and welded into one piece, so that the fixing portion 4 is confined between the tab 101 and the tab bracket 2, thereby fixing the tab 101 to the tab bracket 2 through the fixing portion 4 after the tab 101 is welded and fixed.

[0057] Continuing to combine Figures 1 to 5 as shown therein, in some exemplary implementation forms, this embodiment may, for example, make the tab bracket 2 include an upper connection plate 202 and a lower connection plate 203.

[0058] Wherein, the upper connection plate 202 and the lower connection plate 203 are respectively disposed on the substrate 201 along the height direction of the cell group 1, and both the upper connection plate 202 and the lower connection plate 203 extend toward one side of the cell group 1. The upper connection plate 202 is located above the tabs 101 on the same side, and the lower connection plate 203 is located below the tabs 101 on the same side. The acquisition assembly is connected to each temperature acquisition unit 3 via an FPC board 5, and the FPC board 5 is disposed on the bottom wall of the upper connection plate 202 or on the top wall of the lower connection plate 203.

[0059] It can be understood that the arrangement of the upper connection plate 202 and the lower connection plate 203 facilitates the processing and manufacturing of the tab bracket 2, and contributes to the installation of the FPC board 5. Moreover, arranging the FPC board 5 on the bottom wall of the upper connection plate 202 or the top wall of the lower connection plate 203 helps protect the FPC board 5, facilitates the connection between the acquisition assembly and the temperature acquisition unit 3 with the FPC, and is beneficial to design and implementation.

[0060] In a specific implementation, the through holes on the tab bracket 2 for the tab 101 to pass through are formed on the substrate 201. The upper connecting plate 202 and the lower connecting plate 203 are respectively arranged on both sides of the substrate 201 along the height direction of the cell assembly 1. For ease of manufacturing, the substrate 201, the upper connecting plate 202, and the lower connecting plate 203 can be integrally formed, for example. In addition, the connection method between the FPC board 5 and the tab bracket 2 can refer to the connection method between the FPC board 5 and the tab bracket 2 in existing soft-pack battery modules (such as adhesive bonding), and will not be described in detail here.

[0061] Continue to combine Figures 1 to 5 As shown, in some exemplary embodiments, this embodiment may, for example, allow the temperature acquisition unit 3 and the tab 101 to be connected via a fastening assembly 6.

[0062] Understandably, the fastening component 6 is designed to ensure the assembly stability of the temperature acquisition unit 3 and the tab 101, avoid connection failure caused by shaking during battery pack use, and facilitate the assembly of the temperature acquisition unit 3.

[0063] Continue to combine Figures 1 to 5 As shown, in some exemplary embodiments, the temperature acquisition unit 3 and the tab 101 are connected by a fastening assembly 6. In this embodiment, the temperature acquisition unit 3 may be annular, and the fastening assembly 6 includes bolts and nuts.

[0064] The tab 101 is provided with a connection hole 7. The bolt passes through the temperature acquisition unit 3 and the connection hole 7 in sequence and is screwed onto the nut on the side of the tab 101 away from the temperature acquisition unit 3.

[0065] It is understandable that by making the temperature acquisition unit 3 ring-shaped and providing the connecting hole 7 on the tab 101, it is convenient to assemble the temperature acquisition unit 3 onto the tab 101 with bolts and nuts. Furthermore, by making the fastening assembly 6 include bolts and nuts, it is convenient to process and manufacture, which is helpful for design and implementation.

[0066] In practical implementation, the temperature acquisition unit 3 can be, for example, a temperature sensing coil. When the bolt passes through the connection hole 7 of the tab 101, it first passes through the temperature sensing coil. Of course, in addition to using a temperature sensing coil, the temperature acquisition unit 3 can also refer to the relevant temperature acquisition structures in existing battery packs (such as acquisition plates), which will not be elaborated here.

[0067] Continue to combine Figures 1 to 5As shown, in some exemplary embodiments, taking the tab 101 having a connection hole 7 as an example, this embodiment can, for example, make the distance between the edge of the projection outline of the connection hole 7 and the edge of the projection outline of the tab 101 along the length direction of the battery cell assembly 1 satisfy: L≥1.6mm.

[0068] It is understandable that by limiting the distance L between the edge of the projection contour of the connection hole 7 in the length direction of the cell assembly 1 and the edge of the projection contour of the tab 101 to satisfy: L≥1.6mm, it is beneficial to ensure the structural strength of the tab 101, and also to ensure the connection stability between the temperature acquisition unit 3 and the tab 101, which is convenient for design and implementation.

[0069] In specific implementation, the distance L between the edge of the projection profile of the connecting hole 7 in the length direction of the cell assembly 1 and the edge of the projection profile of the tab 101 refers to the distance between the edge of the projection profile of the connecting hole 7 in the length direction of the cell assembly 1 and the edge of the projection profile closest to it.

[0070] Continuing with reference to the figures shown, in some exemplary embodiments, this embodiment may, for example, include an end plate 8 and a support plate 9 in the pouch cell module.

[0071] The upper end plates 8 are located on both sides of the cell assembly 1 along the length of the cell assembly 1, and several support plates 9 are connected between the two end plates 8. Along the height of the cell assembly 1, the top of each upper connecting plate 202 is connected to a support plate 9, and the bottom of each lower connecting plate 203 is connected to a support plate 9.

[0072] It is understandable that the support plate 9 facilitates the connection between the end plate 8 and the electrode bracket 2, and the support plate 9 can connect the end plate 8 and the electrode bracket 2 into one unit, thereby facilitating better support and fixation of the battery cell assembly 1. The structure is simple and easy to design and implement.

[0073] In practice, the two ends of the support plate 9 are connected to the end plates 8 on both sides, and at least the middle part of the support plate 9 is connected to the corresponding upper connecting plate 202 and lower connecting plate 203, thereby forming a frame to constrain the battery cell assembly 1 within the frame.

[0074] Continue to combine Figures 1 to 5 As shown, in some exemplary embodiments, taking the pouch cell module including end plate 8 and support plate 9 as an example, this embodiment may, for example, make each support plate 9 include a main body 901 and a mounting part 902.

[0075] The main body 901 is arranged along the length of the battery cell assembly 1, and the mounting parts 902 are respectively provided at both ends of the main body 901, and each mounting part 902 is detachably connected to the corresponding end plate 8.

[0076] It is understandable that by making the support plate 9 include a main body 901 and a mounting part 902, and the mounting part 902 is detachably connected to the end plate 8, the structural strength can be improved by cooperating with the main body 901 and the mounting part 902, while the main body 901 can be made into a long strip shape, so that the area of ​​the support plate 9 can be reduced as much as possible, thereby achieving the purpose of weight reduction.

[0077] In practical implementation, the support plate 9 can be made of metal, for example, and the mounting part 902 is bent from both ends of the main body 901 toward the end plate 8 and is detachably assembled onto the end plate 8 by screw connection. In this case, the support plate 9 can fasten the two end plates 8 to the cell assembly 1. In practical implementation, the conventional cable ties for binding the cell assembly 1 can be eliminated, and the cell assembly 1 can be constrained and provided with binding force by the end plate 8, the tab bracket 2 and the support plate 9.

[0078] Furthermore, the connection between the main body 901, the upper connecting plate 202, and the lower connecting plate 203 can be, for example, a snap-fit ​​connection. The upper connecting plate 202 and the lower connecting plate 203 have outwardly protruding snap-fit ​​protrusions 10, and the corresponding snap-fit ​​holes 903 are provided on the main body 901. The snap-fit ​​protrusions 10 snap into the snap-fit ​​holes 903 to form a snap-fit ​​connection between the main body 901, the upper connecting plate 202, and the lower connecting plate 203. Of course, besides the snap-fit ​​connection, existing connection methods (such as adhesive bonding) can also achieve this design, and will not be elaborated further here.

[0079] It is worth noting that, regarding the soft-pack battery module of this embodiment, based on the above exemplary implementations, in specific implementation, as a preferred embodiment, it is still composed of... Figures 1 to 5 As shown, it generally includes a battery cell assembly 1 and a tab support 2.

[0080] The battery cell assembly 1 is formed by stacking several pouch cells sequentially, with the large surfaces of each pouch cell facing each other, and the tabs 101 of each pouch cell arranged on both sides of the width direction of the battery cell assembly 1. Each tab support 2 includes a substrate 201 and a data acquisition component disposed on the substrate 201, and the substrate 201 is provided with a fixing part 4 for fixing several tabs 101 on the same side, and several temperature acquisition units 3 in the data acquisition component are connected to each tab 101 in a corresponding manner.

[0081] The tab support 2 includes an upper connecting plate 202 and a lower connecting plate 203. The upper connecting plate 202 and the lower connecting plate 203 are respectively arranged on the upper and lower sides of the substrate 201 along the height direction of the cell assembly 1, and both the upper connecting plate 202 and the lower connecting plate 203 extend towards one side of the cell assembly 1. The substrate 201 is provided with through holes for the tab 101 to pass through. The bottom wall of the upper connecting plate 202 is provided with an FPC board 5, and the acquisition components and each temperature acquisition unit 3 are connected to the FPC board 5.

[0082] The temperature acquisition unit 3 and the electrode 101 are connected by a fastening assembly 6. The temperature acquisition unit 3 is a temperature sensing coil. The electrode 101 is provided with a connection hole 7. The fastening assembly 6 includes a bolt and a nut. The bolt passes through the temperature sensing coil and the connection hole 7 and is screwed to the nut located on the other side of the electrode 101.

[0083] The distance L between the edge of the projected outline of the connecting hole 7 along the length of the cell assembly 1 and the edge of the projected outline of the tab 101 is 1.6 mm. The soft-pack cell module also includes an end plate 8 and a support plate 9. The end plate 8 is arranged on both sides of the cell assembly 1 along the length of the cell assembly 1, and the support plate 9 is connected to the tab bracket 2 and screwed to the end plate 8.

[0084] The support plate 9 includes a main body 901 and mounting portions 902 arranged on both sides of the main body 901 along the length of the battery cell assembly 1. The main body 901 is connected to the corresponding upper connecting plate 202 and lower connecting plate 203, and the mounting portions 902 are screwed onto the end plate 8. Both the upper connecting plate 202 and the lower connecting plate 203 are provided with snap-fit ​​protrusions 10, and the main body 901 is provided with corresponding snap-fit ​​holes 903, in which the snap-fit ​​protrusions 10 snap into the corresponding snap-fit ​​holes 903.

[0085] In the preferred embodiment of the module end plate 8 above, the specific settings and arrangements of the battery cell assembly 1, the tab bracket 2, the fastening component 6, and the support plate 9 can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the battery cell assembly 1, the tab bracket 2, the fastening component 6, and the support plate 9 can also be referred to the descriptions in the above exemplary embodiments.

[0086] The soft-pack battery cell module of this embodiment adopts the above design. The setting of the tab bracket 2 and the fixing part 4 facilitates the support and fixing of the tabs 101 of the battery cell group 1. By directly connecting the temperature acquisition unit 3 to each tab 101, it is helpful to directly obtain the temperature of the tab 101. Compared with the temperature of the battery pad, it can improve the accuracy of the battery cell temperature acquisition, which is conducive to better control of the charging and discharging efficiency and safety mechanism of the battery pack, and thus improves the quality of the battery pack.

[0087] An embodiment of the second aspect of this application provides a battery pack, which includes a lower housing 11 and a pouch cell module as described above disposed in the lower housing 11.

[0088] In the battery pack of this embodiment, the aforementioned pouch cell module serves as the energy storage unit of the battery pack, and it is generally arranged in the lower housing 11 according to design requirements. Other related structures in the battery pack can be referenced from the relevant structures in existing battery packs, and will not be described in detail here.

[0089] In addition, combined Figure 1 and Figure 6 As shown, in some embodiments of this embodiment, the soft-pack battery module in the battery pack of this embodiment is arranged in two layers arranged vertically. The battery pack of this embodiment also includes a bottom liquid cooling plate 12 disposed at the bottom of the lower soft-pack battery module, a middle liquid cooling plate 13 disposed between the two soft-pack battery modules, and a top liquid cooling plate 14 disposed at the top of the upper soft-pack battery module.

[0090] It is understandable that by arranging two layers of pouch cell modules sequentially inside the battery pack, the energy density of the battery pack can be improved. Furthermore, the bottom liquid cooling plate 12, the middle liquid cooling plate 13, and the top liquid cooling plate 14 can cool the upper and lower surfaces of each layer of pouch cell modules, thereby improving the cooling effect and enhancing the quality of the battery pack.

[0091] In addition, combined Figure 1 and Figure 6 As shown, in some embodiments of this example, the bottom liquid cooling plate 12 and the middle liquid cooling plate 13 can both be made of profiles (such as aluminum profiles), and the profiles have flow channels. The upper and lower surfaces of the profiles are both flat. It is understood that by making both the bottom liquid cooling plate 12 and the middle liquid cooling plate 13 out of profiles, and the upper and lower surfaces of the profiles are both flat, it is easy to process and manufacture. Not only can both upper and lower modules be cooled, but it can also replace the pressure plate in the traditional technology, reduce the number of parts used, and allow the soft-pack battery cell modules to be welded before entering the box without affecting the production process. Furthermore, the flow channel setting facilitates the increase of the heat exchange time between the coolant and the battery cell, which is conducive to better cooling effect.

[0092] Combination Figure 1 and Figure 6 As shown, in some embodiments of this embodiment, the bottom plate of the lower housing 11 may be made of a bottom liquid cooling plate 12, and the lower housing 11 may be integrally formed.

[0093] It is understandable that by integrating the bottom liquid cooling plate 12 onto the lower housing 11, it is beneficial to save space for arranging the bottom liquid cooling plate 12 within the battery pack, thereby helping to improve the energy density of the battery pack and facilitating design and implementation.

[0094] In this embodiment, the battery pack, through the soft-pack cell module configuration described above, can directly acquire the temperature of the tab 101. Compared to acquiring the temperature of the battery pad, this improves the accuracy of cell temperature acquisition, thereby facilitating better control of the battery pack's charging and discharging efficiency and safety mechanisms, and ultimately enhancing the battery pack's overall performance.

[0095] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A pouch cell module, characterized in that: It includes a cell assembly formed by stacking several soft-pack cells in sequence, and tab supports disposed on both sides of the cell assembly in the width direction; The two sides of the cell assembly in the width direction are respectively corresponding to the tabs of each of the pouch cells; Each of the electrode holders includes a base plate and a data acquisition component disposed on the base plate. The base plate is provided with a fixing part for fixing several electrodes on the same side, and several temperature acquisition units in the data acquisition component are connected to each electrode in a corresponding manner.

2. The soft-pack battery module according to claim 1, characterized in that: The tab support includes an upper connecting plate and a lower connecting plate disposed on the substrate along the height direction of the battery cell assembly. Both the upper connecting plate and the lower connecting plate extend toward one side of the battery cell assembly. The upper connecting plate is located above each tab on the same side, and the lower connecting plate is located below each tab on the same side. The acquisition component is connected to each of the temperature acquisition units via an FPC board. The FPC board is located on the bottom wall of the upper connecting plate, or on the top wall of the lower connecting plate.

3. The soft-pack battery module according to claim 2, characterized in that: The temperature acquisition unit and the electrode are connected by a fastening assembly.

4. The soft-pack battery module according to claim 3, characterized in that: The temperature acquisition unit is ring-shaped, and the electrode tab is provided with a connection hole; The fastening assembly includes bolts that pass sequentially through the temperature acquisition unit and the connection hole, and a nut screwed onto the side of the electrode away from the temperature acquisition unit.

5. The soft-pack battery module according to claim 4, characterized in that: Along the length of the battery cell assembly, the distance L between the edge of the projection profile of the connection hole and the edge of the projection profile of the electrode tab satisfies: L≥1.6mm.

6. The pouch cell module according to any one of claims 2 to 5, characterized in that: It also includes end plates located at both ends of the battery cell assembly along its length, with several support plates connected between the two end plates; Along the height direction of the battery cell assembly, the top of each upper connecting plate is connected to the support plate, and the bottom of each lower connecting plate is connected to the support plate.

7. The soft-pack battery module according to claim 6, characterized in that: Each of the support plates includes a main body portion arranged along the length direction of the battery cell assembly, and mounting portions provided at both ends of the main body portion, wherein each mounting portion is detachably connected to the corresponding end plate.

8. A battery pack, characterized in that: It includes a lower housing and a pouch cell module as described in any one of claims 1 to 7 disposed in the lower housing.

9. The battery pack according to claim 8, characterized in that: The soft-pack battery module consists of two layers arranged vertically. The battery pack also includes a bottom liquid cooling plate disposed at the bottom of the lower layer of the soft-pack battery module, a middle liquid cooling plate disposed between the two layers of the soft-pack battery modules, and a top liquid cooling plate disposed at the top of the upper layer of the soft-pack battery module.

10. The battery pack according to claim 9, characterized in that: Both the bottom liquid cooling plate and the middle liquid cooling plate are made of profiles, the profiles having flow channels, and the upper and lower surfaces of the profiles are planar; and / or, The bottom plate of the lower housing is made of the bottom liquid cooling plate, and the lower housing is integrally formed.

Images