Battery module and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery module and a battery pack. The battery module comprises a battery cell group and an L-shaped main frame body, the main frame body comprises an L-shaped corner formed by intersecting two main frame strips extending inwards, the inner side of the corner is provided with a partition plate frame strip formed by extending in the direction of one frame body, and the partition plate frame strip isolates the main frame body to form two groove structures allowing the battery cell group to be inserted therein. And the stacking directions of the two groove structures for the power core groups are vertical to each other. According to the battery module, the battery cell group is fixed by adopting the L-shaped main frame body, so that the battery module is more stable than general glass fiber adhesive tape binding in a vibration environment, and the battery module additionally provided with the main frame body is regular in boundary dimension and is conveniently and accurately fixed in a battery pack.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery technology field, concretely relates to a battery module and battery package. BACKGROUND

[0002] With the continuous development of lithium battery industry, in the aspect of battery cell structure, soft package battery cell has the advantages of flexible processing performance and good energy density characteristics, so that the soft package battery cell is widely used in the lithium battery industry. Due to the limited size of the cockpit of the two-wheeled vehicle, the battery package carried by the two-wheeled vehicle is mainly 20 / 30 / 40Ah, and the conventional 50Ah battery package can only be put into the cockpit with ternary material, and the iron lithium material cannot be put into the cockpit. Therefore, in the design process, under the premise of ensuring safety, the battery package with the same energy density and smaller volume is more likely to win the favor of the consumer market. Reducing the volume of the battery package can be achieved by selecting smaller battery cells, optimizing the internal structure of the battery package, and optimizing the structure of the battery module.

[0003] From the analysis of the internal structure of the battery package, most of the battery packages on the market fix the protection plate above the battery module. The protection plate is a core component of the battery management system, which monitors important parameters such as the charging and discharging state, voltage, current, and temperature of the battery to ensure the safe and stable operation of the battery. The way of fixing the protection plate above the battery module has the following problems: the wire harness connection route is not fixed, and it is difficult to compress the space; the lithium battery PACK production process: detection - grouping - stacking - welding - assembly - testing - packaging, the protection plate can be installed only after the battery module is formed, and the production efficiency is not high.

[0004] From the analysis of the structure of the battery module, the battery module with battery cells stacked in the same direction has a long strip shape. Sometimes, in order to adapt the size of the battery package to the cockpit of the two-wheeled vehicle, the tail battery cell is rotated 90° axially and attached to the side of the module, at which time the shape of the battery module changes from long strip to L shape. The structure of the battery module supports, fixes, and protects the battery cell. Whether the fixing method of the battery module in the battery package is reliable has a direct relationship with the service life and safety and stability of the battery package. Currently, the industry mainly fixes the grouped battery cells by fiberglass tape, which has the following problems: when the shape of the soft package battery cell group is irregular (L-shaped), the fiberglass tape binding is not reliable; during the winding process of the fiberglass tape, the thickness of the rubber coating produced is uncontrollable, making it difficult to accurately fix the module in the battery package. UTILITY MODEL CONTENTS

[0005] In order to solve the problems in the above background art, the utility model provides a battery module and a battery package, which can fix the plug wire harness, release space, and also use the module frame to replace the fiberglass tape to fix the soft package battery cell, thereby enhancing the safety and stability of the internal structure of the battery package.

[0006] In order to achieve the above object, the utility model provides a kind of battery module, including electric core group and L-shaped main frame, the main frame includes the corner formed by the intersection of two inwardly extending main frame strips L-shaped, the inner side of the corner is provided with the baffle frame strip formed along the direction of one of frame, the baffle frame strip is isolated to form two slot structures for the insertion of electric core group, the direction of the electric core group stacked in two slot structures is perpendicular to each other.

[0007] Preferably, the main frame is provided with an outlet.

[0008] Preferably, the electric core group includes at least two soft package electric core stacked into first electric core group and second electric core group, the first electric core group and the second electric core group are inserted into two slot structures respectively, and the direction of the first electric core group and the second electric core group stacked is perpendicular to each other.

[0009] Preferably, the main frame is a plurality of, and the plurality of main frames are arranged uniformly along the top to bottom of the electric core group.

[0010] Preferably, the top and the bottom of the electric core group are provided with busbars, and the main frame located at the top and the bottom of the electric core group protrudes from the busbar at the corresponding position.

[0011] Preferably, the inner side of the main frame is provided with a protrusion extending along the circumference of the main frame.

[0012] Preferably, a first foam is mounted on the protrusion, and the two sides of the first foam are respectively abutted with the electric core group and the main frame.

[0013] The utility model also provides a kind of battery pack, including box and the battery module as described in any one of the above installed in the box, the box is provided with box cover, the box cover is equipped with fixing piece, the fixing piece is installed with protection plate, and the protection plate is electrically connected with the battery module.

[0014] Preferably, the fixing piece is a stud, and the two ends of the stud are respectively fixedly connected with the box cover and the protection plate; the protection plate is provided with a mounting hole matched with the stud.

[0015] Preferably, the second foam is arranged between the box and the battery module.

[0016] Compared with the prior art, the battery module in the utility model has the following advantages: the battery module in the utility model uses an L-shaped main frame to fix the electric core group, which is more stable than general fiberglass tape binding in a vibrating environment. The battery module with the main frame has regular dimensions, which is convenient for precise fixing in the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0017] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. In the drawings:

[0018] Figure 1 is a structural schematic view of the main frame provided by the present embodiment.

[0019] Figure 2 is a structural schematic view of the battery module provided by the present embodiment. Figure 1 ;

[0020] Figure 3 is a structural schematic view of the battery module provided by the present embodiment. Figure 2 ;

[0021] Figure 4 is a structural schematic view of the battery pack provided by the present embodiment.

[0022] Figure 5 is Figure 4 a sectional view in the A-A direction.

[0023] Figure 6 is Figure 5 a local enlarged schematic view at B.

[0024] Figure 7 is a structural schematic view of the box cover provided by the present embodiment.

[0025] List of reference signs:

[0026] 11, box body; 12, box cover; 13, second foam; 21, first cell group; 22, second cell group; 23, busbar; 3, main frame; 31, corner; 32, partition frame strip; 33, groove structure; 34, wire outlet; 35, convex part; 351, first foam; 4, protection plate; 41, mounting hole. DETAILED DESCRIPTION

[0027] The accompanying drawings are only used for illustrative description and cannot be understood as a limitation to the present application; it should be clear that the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] The terms used in the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.

[0029] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this utility model. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this utility model as detailed in the appended claims. In the description of this utility model, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Furthermore, in the description of this utility model, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship. The present utility model will be further described below with reference to the accompanying drawings and embodiments.

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] As battery packs age, the internal pouch cells tend to bulge (increase in thickness). Two-wheeled vehicles operate under complex conditions, subjecting the battery pack to frequent vibrations. Battery modules secured with fiberglass tape, especially irregularly shaped modules like L-shaped ones, suffer from inconsistent thickness due to the uncontrollable wrapping process, resulting in uneven distribution of the limiting pressure within the battery pack. All these factors contribute to structural instability in the battery module and reduce the battery pack's lifespan.

[0033] like Figures 1-6 As shown, this embodiment discloses a battery module, including a cell assembly and an L-shaped main frame 3. The main frame 3 is composed of main frame strips, including a first upper frame strip and a lower frame strip arranged parallel to each other on the upper and lower sides, and a left frame strip and a first right frame strip arranged parallel to each other on the left and right sides (the upper, lower, left, and right sides of the frame strips are arranged according to...). Figure 1The right end of the first upper frame strip extends vertically inwardly to form a second right frame strip, and the upper end of the first right frame strip extends vertically inwardly to form a second upper frame strip. The second right frame strip and the second upper frame strip form an L-shaped corner 31. A partition frame strip 32 is arranged on the inner side of the corner 31 and extends along the direction of the second upper frame strip or the second right frame strip. The end of the partition frame strip 32 is connected to the left frame strip or the lower frame strip. The partition frame strip 32 divides the L-shaped groove structure 33 on the inner side of the main frame strip into two rectangular groove structures 33 of different sizes. The battery cell group includes at least two soft package battery cells stacked to form a first battery cell group 21 and a second battery cell group 22. The first battery cell group 21 and the second battery cell group 22 are inserted into the two groove structures 33, respectively, and the stacking direction of the first battery cell group 21 and the second battery cell group 22 is perpendicular to each other. As shown in Figure 2 The battery module using the main frame body 3 can accommodate 20 soft package battery cells (not shown in the figure), of which 18 soft package battery cells are arranged adjacently in the first battery cell group 21, and 2 soft package battery cells are arranged axially rotated by 90° in the second battery cell group 22, and are attached to the side of the 18 soft package battery cells to form a 1-20 series soft package battery module, and the whole has an L shape. The L-shaped battery module using the main frame body 3 is more stable than the general fiberglass tape binding in a vibration environment. The battery module with the main frame body 3 has regular dimensions, which is convenient for accurate fixing in the battery pack.

[0034] Further, as shown in Figure 2 The battery module is fixed by three L-shaped main frame bodies 3 at the upper, middle and lower positions, or more. The plurality of main frame bodies 3 are arranged uniformly along the top to the bottom of the battery cell group. The L-shaped battery module with three main frame bodies 3 is more stable than the single main frame body 3, which makes the battery module easy to be accurately fixed in the battery pack.

[0035] Further, as shown in Figure 1 The inner side of the main frame body 3 is provided with a protrusion 35 extending along the circumference of the main frame body 3. The protrusion 35 is provided with a first foam 351. The two sides of the first foam 351 are in abutment with the battery cell group and the main frame body 3, respectively. The protrusion 35 has a ring structure on the inner side of the main frame body 3, and a stepped structure is formed between the protrusion 35 and the main frame body 3. When the battery module is tightly fixed, there is enough space to insert the first foam 351 to buffer the bulging deformation of the soft package battery cell.

[0036] Further, as shown in Figure 3As shown, the top and bottom of the battery cell group are provided with busbars 23, and the main frame 3 at the top and bottom of the battery cell group is provided with a protrusion from the busbar 23 at the corresponding position. In order to protect the components on the busbar 23 and reduce the damage caused by the vibration environment, the battery module often fills the heat-conducting pouring glue on the busbar 23. In the past, a fiberglass tape was often wound around the busbar 23 to form a pouring space. In the embodiment, the installation position of the main frame 3 at both ends of the battery module protrudes from the busbar 23 by a certain distance, leaving a certain pouring glue space. During the pouring process, the un-solidified heat-conducting pouring glue can be prevented from flowing out from around the busbar 23. After the battery module passes through the pouring process and the heat-conducting pouring glue on the busbar 23 at both ends of the battery module cools and solidifies, the battery module can be installed in the battery pack. The design can reduce the process, improve the production efficiency, and make the battery module easy to be accurately fixed in the battery pack.

[0037] Further, the main frame 3 is provided with a wire outlet 34. The wire outlet 34 is arranged on the second upper frame strip of the main frame 3, and the protrusion 35 on the inner side of the main frame 3 is correspondingly recessed to form a notched wire outlet 34, which facilitates the sampling wire harness to enter and exit the battery module, and makes the busbar 23, the protection plate 4 and the like form an electrical connection structure with the battery cell group.

[0038] As shown in the drawings, Figures 4-7 The embodiment also discloses a battery pack, which comprises a box body 11 and a box cover 12, and the battery module as described in the above embodiment is installed in the box body 11, and a fixing member is arranged in the box cover 12 and fixedly connected with the protection plate 4. The protection plate 4 is installed above the battery module, and the production speed of the battery pack is limited by the production process. By installing the protection plate 4 on the box cover 12 through the fixing member, the wire arrangement path can be fixed and the internal space of the battery pack can be further optimized, and the assembly of the protection plate 4 and the wire harness plug can be carried out at the same time as the assembly of the battery module, so that the production time of the battery pack is shortened. The fixing member can be a cushion such as foam tape between the box cover 12 and the protection plate 4, or a rod, a stud or the like, and the fixing manner of the fixing member with the box cover 12 and the protection plate 4 can be pasting, clamping, riveting, welding or screwing and the like. In the embodiment, the stud is taken as an example, and mounting holes 41 (as shown in the drawings) are arranged at four corners of the protection plate 4, the stud is butted with the mounting holes 41 of the protection plate 4, and the stud is fixed on the box cover 12. The battery pack of the embodiment adopts the mode that the protection plate 4 is installed on the box cover 12, which can significantly shorten the production speed of the battery pack in large orders; the battery module is fixed by the module frame, and the service life of the battery module is prolonged and the safety performance is better compared with the battery module fixed by the fiberglass tape, especially in a vibration environment. Figure 7

[0039] ​In addition, the box cover 12 is provided with a current input / output interface connected with the battery module and its electrical components, which is convenient for connecting with other battery modules or devices.

[0040] Further, the box body 11 is provided with a second porous material such as foam 13 between the battery module, which can also be a foam, silica gel, air cushion or other fillers or elastic members; these materials have good elasticity and resilience, can absorb the impact force generated by the movement or vibration of the battery cell or other components of the battery pack, and can well protect the integrity of the internal structure of the battery module or the battery pack.

[0041] The above embodiments only illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed by the present application should be covered by the claims of the present application.

Claims

1. A battery module, characterized by, The application relates to a battery module, which comprises a battery cell group and an L-shaped main frame (3), wherein the main frame (3) comprises an L-shaped corner (31) formed by the intersection of two inwardly extending main frame strips, the inner side of the corner (31) is provided with a partition frame strip (32) extending along one of the frame strips, the partition frame strip (32) separates the main frame (3) into two groove structures (33) for inserting the battery cell group, and the stacking directions of the two groove structures (33) are perpendicular to each other.

2. The battery module of claim 1, wherein, The main frame (3) is provided with a wire outlet (34).

3. The battery module of claim 1, wherein, The battery cell group comprises a first battery cell group (21) and a second battery cell group (22) stacked by at least two soft package battery cells, the first battery cell group (21) and the second battery cell group (22) are respectively inserted into the two groove structures (33), and the stacking directions of the first battery cell group (21) and the second battery cell group (22) are perpendicular to each other.

4. The battery module of claim 1, wherein, The main frame (3) is provided with a wire outlet (34).

5. The battery module of claim 4, wherein, The top and bottom of the battery cell group are provided with busbars (23), and the main frame (3) located at the top and bottom of the battery cell group protrudes from the busbar (23) at the corresponding position.

6. The battery module of claim 1, wherein, The inner side of the main frame (3) is provided with a protrusion (35) extending along the circumference of the main frame (3).

7. The battery module of claim 6, wherein, The protrusion (35) is provided with a first foam (351), and the two sides of the first foam (351) are respectively in abutment with the battery cell group and the main frame (3).

8. A battery pack, characterized by, The application relates to a battery module, which comprises a battery cell group and an L-shaped main frame (3), wherein the main frame (3) comprises an L-shaped corner (31) formed by the intersection of two inwardly extending main frame strips, the inner side of the corner (31) is provided with a partition frame strip (32) extending along one of the frame strips, the partition frame strip (32) separates the main frame (3) into two groove structures (33) for inserting the battery cell group, and the stacking directions of the two groove structures (33) are perpendicular to each other.

9. The battery pack of claim 8, wherein, The main frame (3) is provided with a wire outlet (34).

10. The battery pack of claim 8, wherein, The battery cell group comprises a first battery cell group (21) and a second battery cell group (22) stacked by at least two soft package battery cells, the first battery cell group (21) and the second battery cell group (22) are respectively inserted into the two groove structures (33), and the stacking directions of the first battery cell group (21) and the second battery cell group (22) are perpendicular to each other. The main frame (3) is provided with a wire outlet (34). The top and bottom of the battery cell group are provided with busbars (23), and the main frame (3) located at the top and bottom of the battery cell group protrudes from the busbar (23) at the corresponding position. The inner side of the main frame (3) is provided with a protrusion (35) extending along the circumference of the main frame (3). The protrusion (35) is provided with a first foam (351), and the two sides of the first foam (351) are respectively in abutment with the battery cell group and the main frame (3). The application relates to a battery module, which comprises a battery cell group and an L-shaped main frame (3), wherein the main frame (3) comprises an L-shaped corner (31) formed by the intersection of two inwardly extending main frame strips, the inner side of the corner (31) is provided with a partition frame strip (32) extending along one of the frame strips, the partition frame strip (32) separates the main frame (3) into two groove structures (33) for inserting the battery cell group, and the stacking directions of the two groove structures (33) are perpendicular to each other. The main frame (3) is provided with a wire outlet (34). The battery cell group comprises a first battery cell group (21) and a second battery cell group (22) stacked by at least two soft package battery cells, the first battery cell group (21) and the second battery cell group (22) are respectively inserted into the two groove structures (33), and the stacking directions of the first battery cell group (21) and the second battery cell group (22) are perpendicular to each other. The main frame (3) is provided with a wire outlet (34). The top and bottom of the battery cell group are provided with busbars (23), and the main frame (3) located at the top and bottom of the battery cell group protrudes from the busbar (23) at the corresponding position. The inner side of the main frame (3) is provided with a protrusion (35) extending along the circumference of the main frame (3). The protrusion (35) is provided with a first foam (351), and the two sides of the first foam (351) are respectively in abutment with the battery cell group and the main frame (3).

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