Battery system

Abstract

The battery system comprises a box body, a battery cell assembly and a polystyrene foam layer, the box body comprises an outer frame and a bottom plate, the outer frame and the bottom plate are connected to form a containing cavity with an opening in one end, and the containing cavity comprises a battery bin and an electrical bin; the battery cell assembly is fixed in the battery compartment; the polystyrene foam layer comprises a first adhesive layer and a second adhesive layer which are connected with each other, the battery compartment is filled with the first adhesive layer to wrap the battery cell assembly, the second adhesive layer protrudes out of the opening of the battery compartment, and the thickness of the second adhesive layer is H, 0 mlt; h is less than or equal to 50mm, so that the sealing cost is reduced and the visibility in the foaming process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery system. Background Art

[0002] Existing battery systems typically use a foam sealant and a cover plate for sealing. The battery interior is filled with foam sealant and then covered with a cover plate for sealing. However, this approach has several drawbacks. First, the cover plate is expensive and heavy. Second, the foaming of the foam sealant inside the battery cannot be detected after the cover plate is in place. Furthermore, using the cover plate for sealing requires the use of components such as sealant and a sealing ring, which increases costs and steps. Therefore, optimizing the sealing structure of the battery system to reduce costs and improve visibility is of great practical significance to the battery system. Utility Model Content

[0003] One object of the present invention is to provide a battery system, which aims to reduce sealing costs and improve the visibility of the foaming process.

[0004] To achieve the above-mentioned purpose, the present invention provides a solution: a battery system, which includes: a box body, including an outer frame and a bottom plate, the outer frame and the bottom plate are connected to form a accommodating cavity with an opening at one end, the accommodating cavity includes a battery compartment and an electrical compartment; a battery cell assembly, fixed in the battery compartment; a foam layer, protruding from the opening of the battery compartment and closing the opening, and no cover is installed on the side of the foam layer facing away from the battery compartment.

[0005] Optionally, the foamed rubber layer includes a first rubber layer and a second rubber layer connected to each other, the first rubber layer is filled in the battery compartment to cover the battery core assembly, and the second rubber layer protrudes from the opening of the battery compartment.

[0006] Optionally, the thickness of the second adhesive layer is H,0 mm <H≤50mm。

[0007] Optionally, the box body further includes an upper cover, which is connected to the outer frame to cover and seal the electrical compartment, and the second adhesive layer is flush with a side of the upper cover facing away from the outer frame.

[0008] Optionally, the box body also includes a rubber baffle and a support beam. The support beam is arranged in the accommodating cavity across the outer frame. The rubber baffle is connected to the support beam. The battery compartment and the electrical compartment are located on opposite sides of the rubber baffle. The rubber baffle can prevent the foam rubber layer from flowing into the electrical compartment.

[0009] Optionally, the box body further includes side beams, which are arranged in the battery compartment, with opposite ends of the side beams respectively connected to the support beam and the outer frame, and the side beams, the support beam and the outer frame are jointly arranged to form a pressure relief chamber.

[0010] Optionally, the rubber baffle is provided with a snap-in groove and a clearance groove, the snap-in groove is snap-fitted with the side beam to achieve positioning, and the clearance groove is provided at both ends of the rubber baffle to provide clearance space.

[0011] Optionally, the second adhesive layer is further overlapped on the top surface of the outer frame and the top surface of the support beam.

[0012] Optionally, an air guide hole is opened on the outer frame, and the air guide hole is used to connect the battery compartment with the outside.

[0013] Optionally, the air guide hole is arranged at an angle toward the bottom plate at one end close to the battery compartment.

[0014] Optionally, the box body further includes a guide member, which is fixedly connected to the inner wall of the outer frame forming the battery compartment, and the guide member extends from the opening toward the bottom plate to guide the first adhesive layer to fill the battery compartment.

[0015] The beneficial effects of the present invention are:

[0016] Different from the prior art, the present application adopts a double-layer structure of a first adhesive layer and a second adhesive layer connected to each other. The first adhesive layer fills the battery compartment and covers the battery cell assembly. The second adhesive layer protrudes from the opening of the battery compartment, overlaps the outer frame and the top surface of the support beam, and is flush with the side of the upper cover away from the outer frame, acting as a cover. Compared with the prior art, the present application omits the cover, which reduces costs and reduces the weight of the structure, making it easier to develop lightweight batteries. Moreover, since there is no need to use a cover to seal, the foaming of the foam glue in the battery system can be clearly observed, making it easier to control the progress of the foaming process. In addition, since no cover is used, the related steps of sealing the cover are also eliminated, reducing the use of additional components such as sealants and sealing rings, simplifying the operating steps and further saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 1 This is an overall schematic diagram of the battery system provided by an embodiment of the present utility model;

[0019] Figure 2 This is a schematic structural diagram of a box provided by an embodiment of the present utility model;

[0020] Figure 3 This is a schematic structural diagram of a rubber baffle provided by an embodiment of the present utility model;

[0021] Figure 4 The embodiment of the present utility model provides Figure 2 A partial enlarged schematic diagram of area A in the middle;

[0022] Figure 5 The embodiment of the present utility model provides Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle;

[0023] Figure 6 The embodiment of the present utility model provides Figure 5 A partial enlarged schematic diagram of area B in the middle;

[0024] Figure 7 The embodiment of the present utility model provides Figure 1 Schematic diagram of the cross-sectional structure at the middle BB;

[0025] Figure 8 The embodiment of the present utility model provides Figure 7 A partial enlarged schematic diagram of the middle C area.

[0026] Description of Figure Numbers:

[0027] 20. Box body; 201. Outer frame; 2011. Air guide hole; 202. Bottom plate; 2021. Pressure relief chamber; 203. Rubber baffle; 2031. Snap-fit ​​groove; 2032. Clearance groove; 204. Support beam; 205. Guide member; 206. Upper cover; 207. Side beam; 208. Accommodation chamber; 2081. Battery compartment; 2082. Electrical compartment; 2083. Opening;

[0028] 30, foam rubber layer; 301, first rubber layer; 302, second rubber layer;

[0029] 40. Battery cell assembly; 401. Single battery;

[0030] 50. Temperature control component; 501. Heat conduction plate; 502. Connecting pipe. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1 、 Figure 2 and Figure 5 , Figure 1 This is an overall schematic diagram of the battery system provided by the embodiment of the utility model. Figure 2 This is a schematic structural diagram of the box 20 provided in an embodiment of the present utility model. Figure 5 The embodiment of the present utility model provides Figure 1 Schematic cross-sectional structure diagram at A-A in the figure.

[0033] An embodiment of the present utility model provides a battery system, which includes a box body 20, a battery cell assembly 40, and a foamed glue layer 30. The box body 20 includes an outer frame 201 and a bottom plate 202 that are connected to each other. The outer frame 201 and the bottom plate 202 can be fixed by bolts, or can be fixed by rivets, or can also be fixed by other methods such as welding and bonding. The outer frame 201 and the bottom plate 202 form a receiving cavity 208 with an opening 2083 at one end. The receiving cavity 208 includes an electrical compartment 2082 and a battery compartment 2081. The battery cell assembly 40 is disposed in the battery compartment 2081. The battery cell assembly 40 can be fixed in the battery compartment 2081 by structural glue, providing electrical energy for the battery system and having the functions of charging and discharging.

[0034] The foamed glue layer 30 includes a first glue layer 301 and a second glue layer 302. The first glue layer 301 and the second glue layer 302 are connected to each other. The first glue layer 301 is filled in the battery compartment 2081 to wrap the battery cell assembly 40. The second glue layer 302 protrudes from the opening 2083 of the battery compartment 2081. The thickness of the second glue layer 302 is H, that is, the vertical distance from the top surface of the outer frame 201 to the side of the second glue layer 302背离外框201一侧. The thickness setting needs to meet a certain range, and the range is: 0mm < H ≤ 50mm. The second glue layer 302 with a suitable thickness can be selected within the thickness range according to requirements to meet the requirements of protection strength.

[0035] Among them, the first glue layer 301 and the second glue layer 302 can be the same type of foamed glue, or the first glue layer 301 and the second glue layer 302 can be different types of foamed glue. For example, the first glue layer 301 uses foamed glue with heat insulation characteristics, and the second glue layer 302 uses foamed glue with mechanical strength characteristics.

[0036] In this embodiment, different from the prior art, by canceling the cover plate structure and directly using foaming glue for sealing, firstly, the use of the cover plate and its accessory components such as sealing rings and sealants is reduced, directly reducing the material cost; at the same time, under the same volume, the mass of the foaming glue layer 30 is much lower than that of the cover plate, so the weight of the system is also reduced. Secondly, the removal of the cover plate not only simplifies the structure but also solves the problem that it is difficult to monitor the foaming state of the foaming glue in the traditional sealing solution. In the traditional design, once the cover plate is installed, the foaming process of the foaming glue inside the battery compartment 2081 is invisible, making it difficult to ensure the foaming condition of the foaming glue. However, in this design, by canceling the cover plate, direct observation and monitoring of the foaming glue filling process are allowed. Specifically, the foaming glue layer 30 adopted in this application includes a first glue layer 301 and a second glue layer 302 connected to each other. The first glue layer 301 is filled inside the battery compartment 2081. By completely covering the battery cell assembly 40, it provides sufficient protection and sealing, preventing the external environment from eroding the battery cells. And the second glue layer 302 protrudes from the opening 2083 of the battery compartment 2081. While achieving the sealing effect, it also provides an additional buffer layer and structural strength. The thickness of the second glue layer 302 is 0mm < H ≤ 50mm, which can be flexibly adjusted according to actual needs. While maintaining the original sealing and protection effect, the foaming process of the foaming glue layer 30 is made visible, reducing the uncertainty in the production process and enhancing the overall reliability of the system.

[0037] Furthermore, the box body 20 further includes an upper cover 206. The upper cover 206 is connected to the outer frame 201 and covers the electrical compartment 2082. The upper cover 206 can achieve the sealing of the electrical compartment 2082 through auxiliary components such as sealing rings and sealants, or the upper cover 206 can also achieve the sealing of the electrical compartment 2082 by welding or bonding. The partition treatment of the electrical compartment 2082 and the battery compartment 2081 will make the sealing function of the foaming glue mainly concentrated in the battery compartment 2081, while the electrical compartment 2082 adopts the traditional cover plate sealing method. Structurally, the sealing functions of the two are independent of each other, facilitating separate optimization. At the same time, the second glue layer 302 is flush with the side of the upper cover 206 facing away from the outer frame 201. This flushness can mean that the top surface of the second glue layer 302 and the top surface of the upper cover 206 are completely in the same height plane, or it can mean that the top surface of the second glue layer 302 and the top surface of the upper cover 206 are approximately in the same height plane.

[0038] In this embodiment, the second adhesive layer 302 is flush with the side of the upper cover 206 facing away from the outer frame 201, making the overall structure of the battery system more flat. Specifically, the second adhesive layer 302 protrudes from the opening 2083 of the battery compartment 2081 and remains flush with the outer surface of the upper cover 206. This eliminates potential misalignment due to height differences, provides visual and structural consistency, and enhances the system's aesthetics and integration. Furthermore, because the second adhesive layer 302 and the upper cover 206 are flush, external pressure or impact forces are more evenly distributed across the entire system surface, avoiding potential structural damage caused by localized stress concentration. Furthermore, the flushness of the second adhesive layer 302 with the upper cover 206 allows for more precise control of the foam filling process, facilitating determination of adequate foam filling during production. This facilitates visual monitoring of the foaming level during manufacturing, ensuring that each battery system achieves a sufficient and uniform seal.

[0039] Further, see Figure 2 and Figure 6 , Figure 2 This is a structural diagram of the box provided by the embodiment of the utility model. Figure 6 The embodiment of the present utility model provides Figure 5 A partial enlarged schematic diagram of area B in the middle. The box body 20 also includes a rubber baffle 203 and a support beam 204 to optimize the internal structure and sealing effect of the battery system. The support beam 204 spans between the outer frame 201 and is arranged inside the accommodating cavity 208 to provide additional structural support. The support beam 204 can be connected to the outer frame 201 by welding or bonding, and the support beam 204 can also be connected to the outer frame 201 by bolts. The rubber baffle 203 is connected to the support beam 204. The rubber baffle 203 can be welded or glued to the support beam 204, and the rubber baffle 203 can also be snapped into place with the support beam 204, dividing the accommodating cavity 208 into two independent areas, namely the battery compartment 2081 and the electrical compartment 2082. The battery compartment 2081 and the electrical compartment 2082 are respectively located on both sides of the rubber baffle 203, thereby realizing physical isolation of the two functional areas.

[0040] In this embodiment, the baffle plate 203 physically isolates the battery compartment 2081 and the electrical compartment 2082, and plays a control and guiding role on the foam glue. The baffle plate 203 can effectively prevent the foam glue from entering unnecessary areas, so that the foam glue is only filled in the battery compartment 2081, thereby providing a uniform and effective seal for the battery cell assembly 40. At the same time, the presence of the baffle plate 203 can also prevent the foam glue from overflowing into the electrical compartment 2082, avoiding affecting the normal operation of the electrical components. The support beam 204 is connected to the baffle plate 203, which enhances the structural strength of the baffle plate 203. The support beam 204 provides additional support for the baffle plate 203 to prevent the baffle plate 203 from failing under the extrusion impact of the foam glue layer 30. In addition, the presence of the support beam 204 helps to maintain the structural integrity of the battery compartment 2081 and the electrical compartment 2082 during the sealing process.

[0041] Furthermore, the box body 20 also includes a side beam 207 to further strengthen the structural stability of the battery compartment 2081. The side beam 207 is arranged inside the battery compartment 2081. The top surface height of the side beam 207 can be lower than the top surface height of the outer frame 201. Its opposite ends are respectively connected to the support beam 204 and the outer frame 201, forming a frame-type reinforcement structure. Among them, the side beam 207 can be arranged parallel to the outer frame 201, and the side beam 207 can also be arranged non-parallel to the outer frame 201. The side beam 207, the support beam 204 and the outer frame 201 are jointly arranged to form a pressure relief chamber 2021. Through the setting of the pressure relief chamber 2021, the pressure relief function of the battery compartment 2081 is realized.

[0042] In this embodiment, the side beam 207 forms a stable support frame by connecting with the support beam 204 and the outer frame 201, which strengthens the overall rigidity of the battery compartment 2081. When the battery is affected by external impact, vibration or temperature change, the side beam 207 can effectively disperse these stresses and reduce the risk of structural deformation in the battery compartment 2081. At the same time, during the operation of the battery, especially in extreme environments such as high temperature and high pressure, excessive pressure may be generated inside. If the pressure cannot be released in time, it will cause the battery assembly to malfunction or even be damaged. The pressure relief chamber 2021 provides a space specifically for regulating and releasing pressure, releasing excess pressure, and avoiding direct impact of pressure on the battery cell assembly 40 and other key components.

[0043] Further, see Figure 3 , Figure 3This is a schematic diagram of the structure of a rubber baffle 203 provided in an embodiment of the present invention. The rubber baffle 203 is provided with a snap-in slot 2031 and a clearance slot 2032. The snap-in slot 2031 tightly engages with the side beam 207, achieving precise positioning and ensuring structural stability and safety. The clearance slots 2032, located at both ends of the rubber baffle 203, provide the necessary clearance for assembly and facilitate adjustment and adaptation during operation.

[0044] In this embodiment, the retaining plate 203 effectively prevents displacement due to vibration or external forces through the positioning function of the snap-fit ​​groove 2031. The provision of the clearance groove 2032 allows for greater flexibility during assembly, reduces assembly difficulty, improves work efficiency, and thus ensures the reliability and durability of the overall structure.

[0045] Furthermore, the second adhesive layer 302 is further overlapped on the top surface of the outer frame 201 and the top surface of the support beam 204, that is, the orthographic projection of the second adhesive layer 302 on the bottom plate 202 covers the opening 2083 and the orthographic projection of the outer frame 201 on the bottom plate 202. Here, the edge of the second adhesive layer 302 can exceed the edge of the outer frame 201, and the edge of the second adhesive layer 302 can also be within the edge of the outer frame 201.

[0046] In this embodiment, the outer frame 201 and support beam 204 serve as the edge support structure of the battery compartment 2081. Their top surfaces are the edge of the opening 2083 of the battery compartment 2081, making them susceptible to environmental influences. By extending and overlapping the second adhesive layer 302 to the top surfaces of the outer frame 201 and support beam 204, the foam effectively covers this critical area, preventing external air, moisture, dust, or other contaminants from entering the battery compartment 2081 through the top surfaces of the outer frame 201 and support beam 204, further enhancing the battery system's protective capabilities.

[0047] Further, see Figure 2 and Figure 4 , Figure 2 This is a structural diagram of the box provided by the embodiment of the utility model. Figure 4 The embodiment of the present utility model provides Figure 2 A partial enlarged diagram of area A in the center. The outer frame 201 has dedicated air vents 2011, which connect the battery compartment 2081 to the external environment and are primarily used to remove gases generated during the foaming process. The air vents 2011 can be evenly distributed in rows or columns, or scattered.

[0048] In this embodiment, the foam typically undergoes chemical reactions and physical expansion as it fills the battery compartment 2081, releasing gas. To improve the filling quality and sealing effectiveness of the foam, the air vents 2011 play a key role. They rapidly remove gas during the curing phase of the foam, preventing gas accumulation within the foam layer 30. These vents ensure that the foam fully fills every corner of the battery compartment 2081, forming a uniform, continuous sealing layer and enhancing the overall sealing effectiveness of the battery cell assembly 40.

[0049] Further, see Figure 7 and Figure 8 , Figure 7 The embodiment of the present utility model provides Figure 1 Schematic diagram of the cross-sectional structure at BB in the middle, Figure 8 The embodiment of the present utility model provides Figure 7 A partial enlarged diagram of area C in the middle. The end of the air guide hole 2011 close to the battery compartment 2081 is tilted toward the bottom plate 202, and the end of the air guide hole 2011 away from the battery compartment 2081 can be horizontally arranged. The end of the air guide hole 2011 away from the battery compartment 2081 can also be tilted toward the bottom plate 202.

[0050] In this embodiment, the tilted air holes 2011 are designed to optimize the gas discharge path during the foaming process. Since the foam releases gas during curing, especially in the early stages of foaming, this gas typically accumulates upward. By tilting the air holes 2011, with the end closest to the battery compartment 2081 facing the base plate 202, the gas naturally flows in the tilted direction, effectively discharging the gas generated during the foaming process.

[0051] Further, see Figure 2 and Figure 4 , Figure 2 This is a structural diagram of the box provided by the embodiment of the utility model. Figure 4 The embodiment of the present utility model provides Figure 2 A partial enlarged schematic diagram of area A in the center. The housing 20 also includes a guide 205, which is fixedly connected to the inner wall of the battery compartment 2081 formed by the outer frame 201 and extends from the opening 2083 toward the bottom plate 202. The guide 205 can be a guide bar or a guide pattern to guide the filling process of the foam adhesive, ensuring that the first adhesive layer 301 is evenly distributed within the battery compartment 2081.

[0052] In this embodiment, the provision of guide member 205 optimizes the filling process of first adhesive layer 301. The foam filling within battery compartment 2081 must be uniform and comprehensive to maintain good sealing and structural stability. Guide member 205 forms a guiding channel within battery compartment 2081, guiding the foam from opening 2083 toward base plate 202, allowing it to evenly expand and fill battery compartment 2081. This effectively prevents uneven filling of the foam, ensuring adequate coverage of every area, thereby improving the overall effectiveness and reliability of the sealing layer.

[0053] Further, see Figure 5 , Figure 5 The embodiment of the present utility model provides Figure 1 The battery cell assembly 40 is composed of a plurality of single cells 401 , which are arranged in a spaced manner within the battery compartment 2081 . The first adhesive layer 301 is filled between the single cells 401 .

[0054] In this embodiment, by spacing the individual cells 401 apart from each other, direct contact between the individual cells 401 can be effectively reduced, thereby reducing the risk of short circuits and the possibility of interference between the cells. This spacing arrangement allows for a certain amount of space between the cells, allowing the heat generated during the battery charging and discharging process to be dissipated more effectively, avoiding overheating caused by heat accumulation. Secondly, the first adhesive layer 301 filling the gaps between the multiple individual cells 401 not only effectively fills the gaps between the cells, but also forms a uniform support and sealing layer within the battery assembly, helping to enhance the structural stability between the cells.

[0055] Further, see Figure 5 and Figure 7 , Figure 5 The embodiment of the present utility model provides Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle, Figure 7 The embodiment of the present utility model provides Figure 1Schematic diagram of the cross-sectional structure at the middle BB. The battery system also includes a temperature control component 50, which is specifically used to regulate the operating temperature of the battery system. The temperature control component 50 integrates multiple heat conducting plates 501 and connecting tubes 502, which work together to optimize the thermal management of the battery system. Multiple heat conducting plates 501 and connecting tubes 502 are embedded in the first adhesive layer 301. The heat conducting plates 501 are arranged between multiple single batteries 401, and these heat conducting plates 501 are wavy in shape. The wavy structure adapts to the shape of the single battery 401, increasing the contact area between the heat conducting plates 501 and the foaming rubber layer 30. Multiple heat conducting plates 501 are interconnected by connecting tubes 502 to form a heat circulation channel. Heat can be transferred from the heat source (such as the single battery 401) to the heat conducting plates 501 through the heat conducting plates 501, and then to the connecting tubes 502. The connecting tubes 502 can be bellows with coolant inside, which can continuously exchange heat with the outside to maintain the temperature stability of the battery module.

[0056] In this embodiment, the temperature control component 50 transfers heat through the heat conducting plate 501 and the connecting pipe 502 to avoid local overheating and keep the temperature of the entire system within a stable range. For the foaming process of the foam glue, uneven foaming or performance degradation of the foam glue caused by local overheating or temperature fluctuations is avoided. Stable temperature conditions contribute to the uniform expansion and curing of the foam glue, thereby improving its sealing effect and structural support capability in the battery system. In addition, for the battery cell assembly 40, the temperature control component 50 can avoid abnormal temperature increases in the battery cell assembly 40, thereby protecting the stability of the battery cell assembly 40 and its electrochemical reaction, extending its service life, and reducing the risk of performance degradation due to temperature fluctuations.

[0057] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship and movement status of the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0058] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element through an intervening element.

[0059] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0060] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery system, characterized in that: include: The box body includes an outer frame and a bottom plate, wherein the outer frame and the bottom plate are connected to form a receiving cavity with an opening at one end, and the receiving cavity includes a battery compartment and an electrical compartment; A battery cell assembly is fixed in the battery compartment; The foam layer protrudes from the opening of the battery compartment and closes the opening. No cover plate is installed on the side of the foam layer facing away from the battery compartment.

2. A battery system according to claim 1, characterized in that: The foamed rubber layer includes a first rubber layer and a second rubber layer connected to each other, the first rubber layer is filled in the battery compartment and covers the battery core assembly, and the second rubber layer protrudes from the opening of the battery compartment.

3. A battery system according to claim 2, characterized in that: The thickness of the second adhesive layer is H,0 mm <H≤50mm。 4. A battery system according to claim 2, characterized in that: The box body further includes an upper cover, which is connected to the outer frame to cover the electrical compartment, and the second adhesive layer is flush with a side of the upper cover away from the outer frame.

5. A battery system according to claim 2, characterized in that: The box body also includes a rubber baffle and a support beam. The support beam is arranged in the accommodating cavity across the outer frame. The rubber baffle is connected to the support beam. The battery compartment and the electrical compartment are respectively located on opposite sides of the rubber baffle. The rubber baffle can prevent the foam rubber layer from flowing into the electrical compartment.

6. A battery system according to claim 5, characterized in that: The box body also includes side beams, which are arranged in the battery compartment. The opposite ends of the side beams are respectively connected to the support beams and the outer frame. The side beams, the support beams and the outer frame are jointly arranged to form a pressure relief chamber.

7. A battery system according to claim 6, characterized in that: The rubber baffle is provided with a clamping groove and a clearance groove, the clamping groove is clamped with the side beam to achieve positioning, and the clearance groove is arranged at both ends of the rubber baffle to provide clearance space.

8. A battery system according to claim 5, characterized in that: The second adhesive layer is further overlapped on the top surface of the outer frame and the top surface of the support beam.

9. The battery system according to claim 1, characterized in that: An air guide hole is provided on the outer frame, and the air guide hole is used to connect the battery compartment with the outside.

10. A battery system according to claim 9, characterized in that: One end of the air guide hole close to the battery compartment is inclined toward the bottom plate.

11. A battery system according to claim 2, characterized in that: The box body further includes a guide member fixedly connected to an inner wall of the outer frame forming the battery compartment, and the guide member extends from the opening toward the bottom plate to guide the first adhesive layer to fill the battery compartment.

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