Battery pack and energy storage device

Abstract

The utility model provides a kind of battery pack and energy storage device, relate to battery technical field.The utility model provides battery pack including shell, liquid cooling plate and multiple battery modules, liquid cooling plate is set to shell bottom, battery module is set in shell, and is located on liquid cooling plate;Thermal conductive structure glue is arranged between liquid cooling plate and battery module, and the side wall between battery module and shell and the adjacent battery module are filled with foaming glue.The utility model provides a kind of battery pack and energy storage device, and structure is simple, and space utilization is high.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack and energy storage device. Background Technology

[0002] Existing battery pack structures typically feature a support plate at the bottom of the casing, with a liquid cooling plate placed on the support plate, and the battery modules mounted on the liquid cooling plate. Reinforcing ribs are often added to the outside of the battery casing to enhance strength. This structure has several drawbacks: firstly, its complexity increases manufacturing difficulty and cost; secondly, it results in insufficient space utilization, limiting the overall performance improvement of the battery pack to some extent. Utility Model Content

[0003] To address at least one of the problems mentioned in the background art, this utility model provides a battery pack and energy storage device with a simple structure and high space utilization.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] In a first aspect, the present invention provides a battery pack, including a shell, a liquid cooling plate and multiple battery modules, wherein the liquid cooling plate is disposed at the bottom of the shell, and the battery modules are disposed inside the shell and located on the liquid cooling plate;

[0006] Thermally conductive structural adhesive is placed between the liquid cooling plate and the battery module, and foam adhesive is filled between the battery module and the side wall of the casing, as well as between adjacent battery modules.

[0007] As an alternative implementation, one side of the housing has an access port, the lower edge of which is higher than the bottom surface of the battery module.

[0008] As an optional implementation, a first gap is formed between two adjacent battery modules along the width direction of the battery module, a second gap is formed between two adjacent battery modules along the length direction of the battery module, a third gap is formed between the long side of the battery module and the side wall of the casing, and a fourth gap is formed between the wide side of the battery module and the side wall of the casing. The second gap, the third gap and the fourth gap are all filled with expanding foam.

[0009] As an optional implementation, the second gap and the third gap are connected, and the third gap and the fourth gap are connected.

[0010] As an optional implementation, the first gap is filled with expanding foam, and first baffles are provided at both ends along the length of the first gap. The height of the expanding foam filling the first gap does not exceed the top of the first baffles.

[0011] As an optional implementation, the first baffle has a folded edge with two connecting holes, which are respectively connected to two adjacent battery modules along the width direction.

[0012] As an alternative implementation, the height of the first baffle is lower than the height of the battery module.

[0013] As an optional implementation, the access port and the wide side of the battery module are opposite each other, and two second baffles are spaced apart in the fourth gap. The access port is located between the two second baffles along the width direction of the battery module.

[0014] As an alternative implementation, in the fourth gap, the expanding foam located between the two second baffles does not extend beyond the lower edge of the access port.

[0015] Secondly, this utility model also provides an energy storage device, including the battery pack described in the first aspect.

[0016] The battery pack provided by this utility model includes a shell, a liquid cooling plate, and multiple battery modules. The liquid cooling plate is disposed at the bottom of the shell, and the battery modules are disposed inside the shell and located on the liquid cooling plate. Thermally conductive structural adhesive is disposed between the liquid cooling plate and the battery modules, and foam adhesive is filled between the battery modules and the side walls of the shell, as well as between adjacent battery modules.

[0017] The battery pack provided by this utility model uses a liquid cooling plate as the bottom of the battery pack shell, which simplifies the structure, reduces the number of parts, and lowers the complexity of the manufacturing process. This makes the internal layout of the battery pack more compact, effectively improving space utilization and making it possible to improve the overall performance of the battery pack. Furthermore, the thermally conductive structural adhesive placed between the liquid cooling plate and the battery module not only efficiently conducts the heat generated by the battery module to the liquid cooling plate for heat dissipation, ensuring the battery operates at a suitable temperature and improving battery performance and lifespan, but the strength of the thermally conductive structural adhesive itself also enhances structural stability. The foam adhesive filled between the battery module and the shell can bond the battery module and the shell into a whole, which can compensate for the strength loss after removing the shell reinforcing ribs, improving the overall structural strength of the battery pack, and also prevent the battery module from shaking or shifting, ensuring the reliability and stability of the battery pack. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1This is a schematic diagram of a first structure of a battery pack provided in an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of a second structure of the battery pack provided in an embodiment of the present utility model;

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 for Figure 1 Top view;

[0023] Figure 5 An exploded view of the battery pack provided in an embodiment of this utility model;

[0024] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0025] Explanation of reference numerals in the attached figures:

[0026] 100-battery pack;

[0027] 110 - Outer casing;

[0028] 111 - Inspection port;

[0029] 120-Liquid Cooling Plate;

[0030] 130-Battery Module;

[0031] 140 - Thermally conductive structural adhesive;

[0032] 150 - Expanding foam;

[0033] 160 - First gap;

[0034] 170 - Second gap;

[0035] 180 - Third gap;

[0036] 190 - Fourth gap;

[0037] 200 - First baffle;

[0038] 210 - Folded edge;

[0039] 220 - Second baffle. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] In this application, the terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” “outer,” “vertical,” “horizontal,” “lateral,” and “longitudinal” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this utility model and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0042] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0043] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0044] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0045] Existing battery pack structures typically feature a support plate at the bottom of the casing, with a liquid cooling plate placed on the support plate, and the battery modules mounted on the liquid cooling plate. Reinforcing ribs are often added to the outside of the battery casing to enhance strength. This structure has several drawbacks: firstly, its complexity increases manufacturing difficulty and cost; secondly, it results in insufficient space utilization, limiting the overall performance improvement of the battery pack to some extent.

[0046] In view of this, the present invention provides a battery pack, including a shell, a liquid cooling plate, and multiple battery modules. The liquid cooling plate is disposed at the bottom of the shell, and the battery modules are disposed inside the shell and located on the liquid cooling plate. A thermally conductive structural adhesive is disposed between the liquid cooling plate and the battery modules, and foam adhesive is filled between the side walls of the battery modules and the shell, as well as between adjacent battery modules. The battery pack provided by the present invention uses a liquid cooling plate as the bottom of the battery pack shell, which simplifies the structure, reduces the number of parts, and reduces the complexity of the manufacturing process. The thermally conductive structural adhesive disposed between the liquid cooling plate and the battery modules can not only efficiently conduct the heat generated by the battery modules to the liquid cooling plate for heat dissipation, ensuring that the battery operates at a suitable temperature and improving battery performance and lifespan, but the strength of the thermally conductive structural adhesive itself can also enhance the structural stability. The foam adhesive filled between the battery modules and the shell can combine the battery modules and the shell into a whole, which can not only compensate for the strength loss after removing the shell reinforcing ribs and improve the overall structural strength of the battery pack, but also prevent the battery modules from shaking and shifting, ensuring the reliability and stability of the battery pack.

[0047] Figure 1 This is a schematic diagram of a first structure of a battery pack provided in an embodiment of the present utility model; Figure 2 This is a schematic diagram of a second structure of the battery pack provided in an embodiment of the present utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 1 Top view; Figure 5 An exploded view of the battery pack provided in an embodiment of this utility model; Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0048] You can refer to this. Figure 1 and Figure 6 This utility model provides a battery pack 100, including a shell 110, a liquid cooling plate 120 and a plurality of battery modules 130. The liquid cooling plate 120 is disposed at the bottom of the shell 110, and the battery modules 130 are disposed inside the shell 110 and located on the liquid cooling plate 120. A thermally conductive structural adhesive 140 is disposed between the liquid cooling plate 120 and the battery modules 130, and foam adhesive 150 is filled between the side walls of the battery modules 130 and the shell 110 and between adjacent battery modules 130.

[0049] It is understandable that, unlike the existing structure which requires a support plate to be set at the bottom of the outer casing 110 and the liquid cooling plate 120 to be set on the support plate, this embodiment can directly use the liquid cooling plate 120 as the bottom of the outer casing 110, and the thermally conductive structural adhesive 140 is set on the surface of the liquid cooling plate 120. On the one hand, it can transfer heat between the battery module 130 and the liquid cooling plate 120. On the other hand, the thermally conductive structural adhesive 140 itself has a certain structural strength after curing, which can make up for the strength loss of removing the support plate, making the overall structure of the battery pack 100 simpler and more compact.

[0050] The battery pack 100 provided in this embodiment uses a liquid cooling plate 120 as the bottom of the outer shell 110 of the battery pack 100, which simplifies the structure, reduces the number of parts, and reduces the complexity of the manufacturing process. It also utilizes the space originally occupied by the support plate, making the internal layout of the battery pack 100 more compact and effectively improving space utilization, thus providing the possibility of improving the overall performance of the battery pack 100. Furthermore, the thermally conductive structural adhesive 140 disposed between the liquid cooling plate 120 and the battery module 130 not only efficiently conducts the heat generated by the battery module 130 to the liquid cooling plate 120 for heat dissipation, ensuring the battery operates at a suitable temperature and improving battery performance and lifespan, but the strength of the thermally conductive structural adhesive 140 itself can also compensate for the structural losses after removing the support plate, enhancing structural stability. By filling the space between the battery module 130 and the housing with expanding foam 150, the battery module 130 and the housing can be integrated into a whole. This can not only make up for the strength loss after removing the reinforcing ribs of the housing and improve the overall structural strength of the battery pack 100, but also prevent the battery module 130 from shaking and shifting, thereby ensuring the reliability and stability of the battery pack 100.

[0051] In the above embodiment, one side of the outer casing 110 may have an access port 111, and the lower edge of the access port 111 is higher than the bottom surface of the battery module 130. By setting the lower edge of the access port 111 higher than the bottom surface of the battery module 130, sufficient space is provided for filling the foam 150 between the battery module 130 and the side wall of the outer casing 110. This ensures that the amount of foam 150 is appropriate and will not overflow from the access port 111, thus preventing the foam 150 from blocking the access port 111 and affecting normal maintenance operations. This ensures that the foam 150 can fix the battery module 130 and enhance its structural strength, while also ensuring the normal functioning of the access port 111.

[0052] In the above embodiment, a first gap 160 can be formed between two adjacent battery modules 130 along the width direction of the battery module 130, a second gap 170 can be formed between two adjacent battery modules 130 along the length direction of the battery module 130, a third gap 180 can be formed between the long side of the battery module 130 and the side wall of the outer casing 110, and a fourth gap 190 can be formed between the wide side of the battery module 130 and the side wall of the outer casing 110. The second gap 170, the third gap 180 and the fourth gap 190 are all filled with expanding foam 150.

[0053] It is understandable that by filling the second gap 170, the third gap 180, and the fourth gap 190 with expanding foam 150, the battery modules 130 can be tightly bonded to the side wall of the outer casing 110, forming an integral support structure. This effectively compensates for the strength loss after the removal of the reinforcing ribs in the traditional casing. Especially under external impact, the elastic buffering effect of the expanding foam 150 can reduce hard collisions between modules and between modules and the casing, avoiding loosening of circuit connections or damage to the cells caused by shaking. Secondly, the filling design for gaps in different directions can achieve differentiated protection. Specifically, the expanding foam 150 filling the second gap 170 in the length direction can resist longitudinal vibration, while the expanding foam 150 in the third and fourth gaps 190 can fill the gaps between the modules and the casing, preventing external moisture and dust from entering the battery pack 100 through the gaps, thus improving waterproof and dustproof performance. In addition, the sealed buffer layer formed after the foam 150 is cured can also block the transmission of noise generated by the battery module 130 during operation. At the same time, by filling the gaps, it eliminates air flow channels, reduces thermal resistance during heat conduction, and works with the thermally conductive structural adhesive 140 to achieve a more uniform temperature field distribution, further optimizing the heat dissipation efficiency and operational stability of the battery pack 100.

[0054] In the above embodiments, the second gap 170 and the third gap 180 can be connected, and the third gap 180 and the fourth gap 190 can be connected. By connecting the second gap 170 and the third gap 180, and the third gap 180 and the fourth gap 190, the expanding foam 150 can form a continuous three-dimensional filling network during the filling process. On the one hand, the connected gap structure can significantly improve the continuity and integrity of the expanding foam 150 filling, avoiding the problem of insufficient local filling caused by gap interruption. When the expanding foam 150 is injected from one of the second gap 170, the third gap 180, or the fourth gap 190, it can quickly diffuse to the remaining gaps through the connecting channels, ensuring that other areas are uniformly filled, especially forming a seamless wrapping effect at complex corners, making the connection strength between the battery module 130 and the side wall of the outer casing 110 more balanced, and effectively resisting multi-directional vibration and impact. On the other hand, the interconnected gap network optimizes the curing efficiency of the expanded foam 150, reduces air bubble defects caused by residual air in isolated gaps, and allows the interconnected expanded foam 150 layers to disperse stress through elastic deformation when the battery pack 100 is subjected to compression deformation, preventing cracking of the adhesive or displacement of the module caused by localized stress concentration. Furthermore, this interconnected design enhances the sealing performance inside the battery pack 100, making it more difficult for external moisture, dust, and other impurities to penetrate through the gaps. Combined with the integrated expanded foam 150 filling layer, this creates a more reliable protective barrier, further improving the environmental adaptability and long-term stability of the battery pack 100.

[0055] In the above embodiment, expanding foam can be filled into the first gap, and first baffles 200 are provided at both ends along the length of the first gap 160. The height of the expanding foam 150 filling the first gap 160 does not exceed the top of the first baffles 200. By providing first baffles 200 at both ends along the length of the first gap 160, the two first baffles 200 can form an independent space with the first gap 160, which allows the filling height of the expanding foam 150 in this independent space to be higher than the filling height of the expanding foam 150 in other gaps. On the one hand, this can make the connection between adjacent battery modules 130 more reliable, further improving the overall structural strength. On the other hand, the first baffles 200 can effectively constrain the filling range of the expanding foam 150, preventing it from overflowing from the connecting gaps into areas such as the inspection port 111 and affecting electrical connections and other components. In addition, the higher expanding foam 150 in this independent space forms a tighter whole with the parts connected to other gaps, which can better disperse stress when the battery pack 100 is impacted, enhance vibration resistance, and improve the reliability and environmental adaptability of the battery pack 100.

[0056] In the above embodiments, the first baffle 200 may have a folded edge 210 with two connecting holes, which respectively connect to two adjacent battery modules 130 along the width direction. The folded edge 210 structure allows the first baffle 200 to form a surface contact connection with the battery modules 130, significantly increasing the stress-bearing area compared to a straight plate structure. When the battery pack 100 is subjected to lateral vibration or impact, the folded edge 210 can evenly transmit the impact force to adjacent modules through the connecting holes, avoiding structural damage caused by single-point stress. The connecting holes provide mechanical fixing points between the modules. By using bolts or clips to pass through the connecting holes, two battery modules 130 can be rigidly connected to the first baffle 200, forming a stable support structure, further enhancing the connection strength between adjacent battery modules 130 and suppressing relative displacement of the battery modules 130.

[0057] Secondly, the combination of the folded edge 210 and the connecting hole design assists in the precise positioning and installation of the battery module 130. During assembly, the first baffle 200 can be pre-fixed to one side of the battery module 130 through the connecting hole, and then the other side of the battery module 130 can be aligned with the baffle as a reference to ensure the dimensional consistency of the first gap 160, providing a standard space for subsequent filling of the expanding foam 150 and avoiding uneven filling due to gap deviation. At the same time, this dual fixing method of mechanical connection and expanding foam 150 filling can provide temporary support for the module before the adhesive cures, preventing the module from shifting before the expanding foam 150 cures, and improving the reliability of the assembly process.

[0058] In the above embodiments, the height of the first baffle 200 can be lower than the height of the battery module 130. By setting the height of the first baffle 200 to be lower than the height of the battery module 130, interference with electrical components (such as terminals, connecting harnesses, etc.) on the top of the battery module 130 can be avoided, ensuring installation space and ease of operation for the components on the top of the battery module 130. When the height of the first baffle 200 is lower than that of the battery module 130, maintenance personnel can directly access the connectors or sensors on the top of the battery module 130 without having to bypass the baffle, thus improving maintenance efficiency.

[0059] In the above embodiment, the inspection port 111 and the wide side of the battery module 130 can be opposite each other. Two second baffles 220 are spaced apart in the fourth gap 190. Along the width direction of the battery module 130, the inspection port 111 is located between the two second baffles 220. By aligning the inspection port 111 with the wide side of the battery module 130 and spaced apart in the fourth gap 190 with the inspection port 111 located between the two second baffles 220, the two second baffles 220 can cut off the connection between the inspection port 111 and other gaps. It can be understood that with this design, except for the foam 150 filling the fourth gap 190 between the two second baffles 220 which cannot exceed the bottom of the inspection port 111, the foam 150 in other gaps can exceed the bottom height of the inspection port 111 and continue to be filled, thereby filling more foam 150 and further enhancing the overall structural strength of the battery pack 100. Secondly, the two second baffles 220 can precisely limit the foam 150, preventing it from overflowing from the inspection port 111, ensuring that a complete sealed buffer layer is formed within the fourth gap 190 without affecting maintenance operations. Moreover, this layout optimizes space utilization, provides an installation benchmark for the structural components around the inspection port 111, and can also disperse forces when subjected to impact, enhancing vibration resistance.

[0060] In the above embodiment, in the fourth gap 190, the expanding foam 150 located between the two second baffles 220 can be kept below the lower edge of the access port 111. This design isolates the access port 111 from other gaps through the second baffles 220, making the fourth gap 190 between the two second baffles 220 an independent filling area. The height of the expanding foam 150 in this area can be precisely controlled so as not to affect the function of the access port 111. Other connecting gaps (such as the first, second, and third gaps 180) are not restricted by baffles and can be filled with more expanding foam 150 beyond the height of the access port 111, significantly increasing the overall filling amount of expanding foam 150 inside the battery pack 100. This enhances the connection strength between the battery module 130 and the outer casing 110. Especially under multi-directional vibration and impact, a thicker layer of expanding foam 150 can more effectively disperse stress and reduce the risk of module displacement.

[0061] Secondly, the height of the expanding foam 150 between the two second baffles 220 is controlled at the lower edge of the inspection port 111, preventing the foam from overflowing and blocking the channel. This ensures that maintenance tools can be easily inserted for operation. Simultaneously, the limiting effect of the second baffles 220 on the expanding foam 150 creates a regular buffer layer in this area. Combined with the higher foam 150 filling in other areas, this constructs a differentiated protection system. Furthermore, this design clearly defines the filling boundary through the second baffles 220, ensuring filling accuracy around the inspection port 111 while allowing free filling in other areas, improving production efficiency and filling consistency.

[0062] Furthermore, this embodiment of the invention also provides an energy storage device, including the battery pack 100 described in the above embodiment. The battery pack 100 includes a shell 110, a liquid cooling plate 120, and multiple battery modules 130. The bottom of the shell 110 has an open structure, and the liquid cooling plate 120 covers the opening. The battery modules 130 are disposed inside the shell 110 and on the liquid cooling plate 120. A thermally conductive structural adhesive 140 is disposed between the liquid cooling plate 120 and the battery modules 130. Foaming adhesive 150 is filled between the side walls of the battery modules 130 and the shell 110, as well as between adjacent battery modules 130. This battery pack 100 uses the liquid cooling plate 120 as the bottom of the shell 110, simplifying the structure, reducing the number of parts, lowering the complexity of the manufacturing process, and utilizing the space originally occupied by the support plate, making the internal layout of the battery pack 100 more compact and effectively improving space utilization. The thermally conductive structural adhesive 140 placed between the liquid cooling plate 120 and the battery module 130 not only efficiently conducts the heat generated by the battery module 130 to the liquid cooling plate 120 for heat dissipation, ensuring the battery operates at a suitable temperature and improving battery performance and lifespan, but the strength of the thermally conductive structural adhesive 140 itself can also compensate for the structural loss after removing the support plate, enhancing structural stability. The expanding foam 150 filled between the battery module 130 and the casing can bond the battery module 130 and the casing into a single unit. This not only compensates for the strength loss after removing the casing reinforcing ribs, improving the overall structural strength of the battery pack 100, but also prevents the battery module 130 from shaking or shifting, ensuring the reliability and stability of the energy storage device.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery pack (100), characterized in that, It includes a housing (110), a liquid cooling plate (120), and multiple battery modules (130). The liquid cooling plate (120) is disposed at the bottom of the housing (110), and the battery modules (130) are disposed inside the housing (110) and located on the liquid cooling plate (120). A thermally conductive structural adhesive (140) is provided between the liquid cooling plate (120) and the battery module (130), and foam adhesive (150) is filled between the sidewalls of the battery module (130) and the outer casing (110) and between adjacent battery modules (130).

2. The battery pack (100) according to claim 1, characterized in that, The outer casing (110) has an access port (111) on one side, and the lower edge of the access port (111) is higher than the bottom surface of the battery module (130).

3. The battery pack (100) according to claim 2, characterized in that, A first gap (160) is formed between two adjacent battery modules (130) along the width direction of the battery module (130), a second gap (170) is formed between two adjacent battery modules (130) along the length direction of the battery module (130), a third gap (180) is formed between the long side of the battery module (130) and the side wall of the outer shell (110), and a fourth gap (190) is formed between the wide side of the battery module (130) and the side wall of the outer shell (110). The second gap (170), the third gap (180) and the fourth gap (190) are all filled with the expanding foam (150).

4. The battery pack (100) according to claim 3, characterized in that, The second gap (170) is connected to the third gap (180), and the third gap (180) is connected to the fourth gap (190).

5. The battery pack (100) according to claim 4, characterized in that, The first gap (160) is filled with the expanding foam (150), and a first baffle (200) is provided at both ends along the length direction of the first gap (160). The height of the expanding foam (150) filling the first gap (160) is not higher than the top of the first baffle (200).

6. The battery pack (100) according to claim 5, characterized in that, The first baffle (200) has a folded edge (210) with two connecting holes, which are respectively connected to two adjacent battery modules (130) along the width direction.

7. The battery pack (100) according to claim 6, characterized in that, The height of the first baffle (200) is lower than the height of the battery module (130).

8. The battery pack (100) according to claim 7, characterized in that, The inspection port (111) and the wide side of the battery module (130) are opposite each other. Two second baffles (220) are spaced apart in the fourth gap (190). The inspection port (111) is located between the two second baffles (220) along the width direction of the battery module (130).

9. The battery pack (100) according to claim 8, characterized in that, In the fourth gap (190), the foam (150) located between the two second baffles (220) does not protrude above the lower edge of the access port (111).

10. An energy storage device, characterized in that, Includes the battery pack (100) as described in any one of claims 1-9.

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