Shell assembly of battery pack, battery pack and electric equipment

Abstract

The utility model relates to a shell assembly of a battery pack, the battery pack and electric equipment, the shell assembly comprises a shell, the shell is provided with a containing groove used for containing a plurality of battery monomers, a glue storage cavity is formed in the wall of the shell, and the glue storage cavity is used for being communicated with a gap between two adjacent battery monomers and / or a gap between each battery monomer and the shell. By means of the technical scheme, the shell assembly of the battery pack can solve the problem that the reliability of connection between the battery assembly and the shell is low in the prior art, the structural strength of the whole battery pack can be improved, and the reliability of the battery pack is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery packs, and in particular to a battery pack housing assembly, a battery pack, and an electrical device. Background Art

[0002] In the related art, after the battery pack is filled with glue, the connection reliability between the battery assembly and the shell is low, which is not conducive to the structural design of the entire battery pack. Utility Model Content

[0003] The purpose of the present disclosure is to provide a battery pack shell assembly, a battery pack and an electrical device, so as to solve the problem of low connection reliability between the battery assembly and the shell in the related art, help to improve the structural strength of the entire battery pack and enhance the reliability of the battery pack.

[0004] In order to achieve the above-mentioned purpose, the first aspect of the present disclosure provides a shell assembly of a battery pack, including a shell, the shell having a receiving groove for accommodating multiple battery cells, and a glue storage cavity in the wall of the shell, the glue storage cavity being used to connect the gap between two adjacent battery cells and / or between the battery cell and the shell.

[0005] Optionally, an exhaust channel is provided in the wall of the shell, and the exhaust channel is used to communicate with the explosion-proof valve of the battery cell. A support portion connecting the two opposite inner walls of the exhaust channel is provided in the exhaust channel, and the glue storage cavity is formed on the support portion.

[0006] Optionally, the shell includes a bottom plate and a frame arranged on the bottom plate, the bottom plate and the frame enclose the accommodating groove, and the exhaust channel is arranged in the bottom plate.

[0007] Optionally, the base plate includes a first plate and a second plate arranged relative to each other along a third direction, the first plate and the frame form the accommodating groove, the exhaust channel is formed between the first plate and the second plate, the supporting portion connects the first plate and the second plate, and a connecting port connecting the gap and the glue storage cavity is provided on the first plate; wherein, the second plate closes the glue storage cavity; or, a glue filling port connecting the glue storage cavity is provided on the second plate.

[0008] Optionally, the first plate includes a plate body, on which the connecting port and the exhaust port for connecting the explosion-proof valve with the exhaust channel are provided; or, the first plate includes a liquid cooling plate, on which the connecting port and the exhaust port for connecting the explosion-proof valve with the exhaust channel are provided.

[0009] Optionally, the glue storage cavity includes a first glue storage section and a second glue storage section, the second glue storage section is connected to the gap through the first glue storage section, and an opening connecting the second glue storage section and the first glue storage section and a stop surface surrounding the opening are provided between the second glue storage section and the first glue storage section, and the stop surface is arranged toward the second glue storage section.

[0010] A second aspect of the present disclosure provides a battery pack, comprising the housing assembly provided by the first aspect.

[0011] The third aspect of the present disclosure provides a battery pack, comprising a plurality of battery cells; a shell having a receiving groove for receiving the plurality of battery cells, a gap between two adjacent battery cells and / or between the battery cells and the shell, a glue storage cavity connected to the gap being provided in the wall of the shell; and a glue filling structure, filling the gap and the glue storage cavity.

[0012] Optionally, an exhaust channel connected to the explosion-proof valve of the battery cell is provided in the wall of the shell, a support portion connecting two opposite inner walls of the exhaust channel is provided in the exhaust channel, and the glue storage cavity is formed on the support portion.

[0013] Optionally, the multiple battery cells are arranged in columns along the first direction and in rows along the second direction; the gap includes a first gap between the battery cells in two adjacent columns, each of the first gaps is connected to one or more of the glue storage cavities; and / or, the gap includes a second gap between the battery cells in two adjacent rows, each of the second gaps is connected to one or more of the glue storage cavities; and / or, the gap includes a third gap between the battery cells and the side wall of the shell, and the third gap is connected to one or more of the glue storage cavities.

[0014] Optionally, one or more support portions arranged at intervals along the second direction are provided at positions corresponding to each of the first gaps in the exhaust channel, and each of the support portions is provided with at least one of the glue storage cavities; and / or, one or more support portions arranged at intervals along the first direction are provided at positions corresponding to each of the second gaps in the exhaust channel, and each of the support portions is provided with at least one of the glue storage cavities.

[0015] Optionally, a first connecting port connecting the first gap and the glue storage cavity is provided on the shell, and in the first direction, the width of the first connecting port is greater than the width of the first gap; and / or, a second connecting port connecting the second gap and the glue storage cavity is provided on the shell, and in the second direction, the width of the second connecting port is greater than the width of the second gap.

[0016] Optionally, the difference between the width of the first communication port and the width of the first gap is 2 mm to 5 mm; and / or the difference between the width of the second communication port and the width of the second gap is 2 mm to 5 mm.

[0017] Optionally, the width of the first gap along the first direction is 1 mm to 5 mm, and / or the width of the second gap along the second direction is 1 mm to 5 mm.

[0018] Optionally, the shell includes a bottom plate and a frame arranged on the bottom plate, the bottom plate and the frame enclose the accommodating groove, and the exhaust channel is arranged in the bottom plate.

[0019] Optionally, the base plate includes a first plate and a second plate arranged relative to each other along a third direction, the first plate and the frame form the accommodating groove, the exhaust channel is formed between the first plate and the second plate, the supporting portion connects the first plate and the second plate, and a connecting port connecting the gap and the glue storage cavity is provided on the first plate; wherein, the second plate closes the glue storage cavity; or, a glue filling port connecting the glue storage cavity is provided on the second plate.

[0020] Optionally, a glue blocking structure is provided between two adjacent battery cells along the first direction and / or along the second direction, so that the battery cells are separated into a first potting section and a second potting section spaced along a third direction by the glue blocking structure, the first potting section is connected to the space between the multiple battery cells and the cover plate of the shell assembly, and the second potting section is connected to the glue filling port through the glue storage cavity.

[0021] Optionally, the glue-blocking structure is a glue-blocking foam or a glue-blocking rubber block.

[0022] Optionally, the glue potting structure is formed of foamed glue or non-foamed glue.

[0023] A fourth aspect of the present disclosure provides an electrical device, comprising the battery pack provided by the second aspect or the battery pack provided by the third aspect.

[0024] Through the above technical solution, that is, the shell assembly of the battery pack provided by the present invention, the shell assembly is provided with multiple glue storage cavities in the wall of the shell, and the glue storage cavities are used to connect to the gap between two adjacent battery cells and / or between the battery cell and the shell. In this way, after, for example, multiple battery cells are placed in the receiving groove of the shell and glue is poured, the potting glue in the above gap can flow into the glue storage cavity, thereby increasing the connection area between the battery cell and the shell, helping the battery cell and the shell to be better connected into a whole, effectively improving the structural strength of the battery pack, and being beneficial to the structural design of the battery pack, thereby improving the reliability of the battery pack.

[0025] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0027] Figure 1 is a schematic structural diagram of a battery pack provided in an exemplary embodiment of the present disclosure;

[0028] Figure 2 is an exploded schematic diagram of a battery pack provided in an exemplary embodiment of the present disclosure;

[0029] Figure 3 is a schematic structural diagram of a battery pack provided in an exemplary embodiment of the present disclosure with a cover plate removed;

[0030] Figure 4 yes Figure 3 A partial enlarged schematic diagram of position A in the middle;

[0031] Figure 5 is a schematic structural diagram of a housing assembly provided in an exemplary embodiment of the present disclosure;

[0032] Figure 6 is a top view of a battery pack provided in an exemplary embodiment of the present disclosure;

[0033] Figure 7 yes Figure 6 Cross-section at the mid-BB position;

[0034] Figure 8 yes Figure 7 A partial enlarged schematic diagram of the middle C position;

[0035] Figure 9 is a bottom view of a battery pack provided in an exemplary embodiment of the present disclosure;

[0036] Figure 10 yes Figure 9 Cross-sectional view at the middle DD position;

[0037] Figure 11 yes Figure 10 A partial enlarged schematic diagram of position E in the middle;

[0038] Figure 12 is a schematic structural diagram of a bottom plate of a housing assembly provided in an exemplary embodiment of the present disclosure;

[0039] Figure 13 yes Figure 12 A partial enlarged schematic diagram of the F position in the middle;

[0040] Figure 14 is an exploded schematic diagram of a bottom plate of a housing assembly provided in an exemplary embodiment of the present disclosure;

[0041] Figure 15 yes Figure 14 A partial enlarged schematic diagram of the G position in the middle;

[0042] Figure 16 FIG. 1 is a schematic structural diagram of a battery cell provided in an exemplary embodiment of the present disclosure.

[0043] Description of Reference Numerals

[0044] 1-shell; 110-accommodating groove; 120-glue storage cavity; 121-first glue storage section; 122-second glue storage section; 123-opening; 124-stop surface; 130-exhaust channel; 140-support part; 150-bottom plate; 151-first plate; 152-second plate; 153-connecting port; 154-glue filling port; 155-exhaust port; 160-frame; 2-battery cell; 210-explosion-proof valve; 3-gap; 310-first gap; 320-second gap; 330-third gap; 4-glue filling structure; 5-glue blocking structure; 6-first potting section; 7-second potting section; 8-cover plate; 9-adhesive layer. DETAILED DESCRIPTION

[0045] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0046] In this disclosure, unless otherwise indicated, "inside" and "outside" refer to the inside and outside relative to the outline of a component or structure. Furthermore, it should be noted that the use of terms such as "first" and "second" is intended to distinguish one element from another and does not imply order or importance. Furthermore, in the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same element.

[0047] According to a first aspect of the present disclosure, a battery pack housing assembly is provided, referring to Figures 1 to 16 As shown, the shell assembly includes a shell 1, which has a receiving groove 110 for accommodating multiple battery cells 2, and a glue storage cavity 120 in the wall of the shell 1, which is used to connect the gap 3 between two adjacent battery cells 2 and / or between the battery cell 2 and the shell 1.

[0048] Through the above technical solution, that is, the shell assembly of the battery pack provided by the present invention, the shell assembly is provided with multiple glue storage cavities 120 in the wall of the shell 1, and the glue storage cavity 120 is used to connect to the gap 3 between two adjacent battery cells 2 and / or between the battery cell 2 and the shell 1. In this way, after, for example, multiple battery cells 2 are placed in the receiving groove 110 of the shell 1 and glue is poured, the potting glue in the above-mentioned gap 3 can flow into the glue storage cavity 120, thereby increasing the connection area between the battery cell 2 and the shell 1, which helps to better connect the battery cell 2 and the shell 1 into a whole, effectively improving the structural strength of the entire battery pack, and is beneficial to the structural design of the entire battery pack, thereby improving the reliability of the entire battery pack.

[0049] In some embodiments, reference Figures 7 to 15 As shown, an exhaust channel 130 may be provided in the wall of the housing 1. The exhaust channel 130 is used to communicate with the explosion-proof valve 210 of the battery cell 2. A support portion 140 is provided in the exhaust channel 130 to connect the two opposite inner walls of the exhaust channel 130. A glue storage cavity 120 is formed on the support portion 140. In this way, by directly utilizing the structure of the support portion 140 forming the two inner walls of the exhaust channel 130 to form the above-mentioned glue storage cavity 120, the space utilization rate of the entire package is better, ensuring the high structural strength of the entire package while contributing to the lightweight design of the entire package. In addition, by providing the exhaust channel 130, when thermal runaway occurs in the battery pack, the explosion-proof valve 210 of the battery cell 2 can be depressurized through the exhaust channel 130.

[0050] In addition, in some embodiments, reference Figure 2 and Figure 7 As shown, the shell 1 may include a base plate 150 and a frame 160 arranged on the base plate 150, the base plate 150 and the frame 160 form a receiving groove 110, and the exhaust channel 130 is arranged in the base plate 150. In this way, the above-mentioned glue storage cavity 120 is formed by utilizing the structure of the support portion 140 of the two inner side walls of the exhaust channel 130 formed in the base plate 150. Since the cross-section of the base plate 150 along the first direction and the second direction is large, the connection area between the battery cell 2 and the base plate 150 can be better increased by arranging the glue storage cavity 120 on the base plate 150, which helps to better connect the battery cell 2 and the shell 1 into a whole, effectively improving the structural strength of the entire battery pack, and is beneficial to the structural design of the entire battery pack, thereby improving the reliability of the entire battery pack.

[0051] Of course, it should be noted that the specific embodiment in which the above-mentioned glue storage cavity 120 is formed on the bottom plate 150 is exemplary. In other embodiments not shown in the figures, the above-mentioned glue storage cavity 120 can also be formed in the frame 160, so as to increase the connection area between the battery cell 2 and the frame 160, improve the structural strength of the battery pack, and facilitate the structural design of the battery pack.

[0052] For example, Figures 7 to 14 As shown, the bottom plate 150 may include a Figure 7 The first plate 151 and the second plate 152 are relatively arranged (in the upper and lower directions of the drawing or the height direction of the battery pack can also be referred to), the first plate 151 and the frame 160 form a receiving groove 110, an exhaust channel 130 is formed between the first plate 151 and the second plate 152, the support portion 140 connects the first plate 151 and the second plate 152, and the first plate 151 is provided with a connecting port 153 connecting the gap 3 and the glue storage cavity 120, so that after the battery pack is filled with glue, the potting glue flowing through the gap 3 can flow into the glue storage cavity 120 through the above-mentioned connecting port 153, so as to achieve the purpose of connecting the battery cell 2 and the shell 1 into a whole, thereby improving the structural strength of the entire battery pack and being beneficial to the structural design of the entire battery pack.

[0053] Wherein, in some embodiments, reference Figure 8 As shown, the second plate 152 can close the glue storage cavity 120, or, in other embodiments, refer to Figure 11 As shown, a glue filling port 154 connected to the glue storage cavity 120 may also be provided on the second plate 152. The present disclosure does not specifically limit this type of deformation. Its purpose is to be able to fill the gap 3 between the shell 1 and the battery cell 2 and / or the gap 3 between adjacent battery cells 2 with glue while also filling the glue storage cavity 120 with potting glue.

[0054] In addition, in some embodiments, reference Figures 2 to 14 As shown, the first plate 151 may include a plate body, which is used to support multiple battery cells 2 to play a supporting role, and the plate body may be provided with the above-mentioned communication port 153 and an exhaust port 155 for connecting the explosion-proof valve 210 with the exhaust channel 130.

[0055] Or, alternatively, the first plate 151 may include a liquid cooling plate to cool the multiple battery cells 2 through the liquid cooling plate, and can play a role in cooling down when thermal runaway occurs, and the liquid cooling plate may be provided with the above-mentioned connecting port 153 and the exhaust port 155 for connecting the explosion-proof valve 210 with the exhaust channel 130. The present disclosure does not specifically limit such deformation methods, and those skilled in the art can design adaptively as needed.

[0056] In some embodiments, reference Figure 8 and Figure 11 As shown, the glue storage cavity 120 may include a first glue storage section 121 and a second glue storage section 122. The second glue storage section 122 is connected to the gap 3 through the first glue storage section 121. An opening 123 connecting the second glue storage section 122 and the first glue storage section 121 and a stop surface 124 surrounding the opening 123 are provided between the second glue storage section 122 and the first glue storage section 121. The stop surface 124 is arranged toward the second glue storage section 122. While ensuring that the support portion 140 has a high structural strength, by increasing the connection area between the battery cell 2 and the shell 1, it helps to better connect the battery cell 2 and the shell 1 into a whole, effectively improving the structural strength of the entire battery pack, and is beneficial to the structural design of the entire battery pack, thereby improving the reliability of the entire battery pack.

[0057] According to a second aspect of the present disclosure, a battery pack is provided, comprising the housing assembly provided in the first aspect. The battery pack has all the advantages of the housing assembly provided in the first aspect, which will not be further elaborated herein.

[0058] According to a third aspect of the present disclosure, a battery pack is provided, which includes a plurality of battery cells 2, a shell 1 and a glue filling structure 4. The shell 1 has an accommodating groove 110 for accommodating the plurality of battery cells 2. There is a gap 3 between two adjacent battery cells 2 and / or between the battery cell 2 and the shell 1. A glue storage cavity 120 connected to the gap 3 is provided in the wall of the shell 1; the glue filling structure 4 is filled in the gap 3 and the glue storage cavity 120. In this way, by filling the glue storage cavity 120 with the above-mentioned glue filling structure 4, the connection area between the battery cell 2 and the shell 1 can be increased, which helps to better connect the battery cell 2 and the shell 1 into a whole, effectively improving the structural strength of the entire battery pack, and is beneficial to the structural design of the entire battery pack, thereby improving the reliability of the entire battery pack.

[0059] Among them, the above-mentioned glue filling structure 4 can be formed by foam glue or non-foam glue (such as ordinary structural glue and sealant and other non-foam glue). Since the above-mentioned foam glue or non-foam glue is usually a fluid glue liquid, after the battery pack is glued, the glue liquid can flow and fill the above-mentioned gap 3 and the glue storage cavity 120.

[0060] In some embodiments, reference Figures 7 to 15As shown, the wall of the housing 1 can be provided with an exhaust channel 130 that communicates with the explosion-proof valve 210 of the battery cell 2. The exhaust channel 130 is provided with a support portion 140 that connects the two opposite inner walls of the exhaust channel 130. The support portion 140 is formed with a glue storage cavity 120. In this way, by directly utilizing the structure of the support portion 140 that forms the two inner walls of the exhaust channel 130 to form the above-mentioned glue storage cavity 120, the space utilization rate of the entire package is better, ensuring the high structural strength of the entire package while contributing to the lightweight design of the entire package. In addition, by providing the exhaust channel 130, the explosion-proof valve 210 of the battery cell 2 can be depressurized through the exhaust channel 130 when thermal runaway occurs in the battery pack.

[0061] In addition, in some embodiments, reference Figure 2 and Figure 7 As shown, the shell 1 may include a base plate 150 and a frame 160 arranged on the base plate 150, the base plate 150 and the frame 160 form a receiving groove 110, and the exhaust channel 130 is arranged in the base plate 150. In this way, the above-mentioned glue storage cavity 120 is formed by utilizing the structure of the support portion 140 of the two inner side walls of the exhaust channel 130 formed in the base plate 150. Since the cross-section of the base plate 150 along the first direction and the second direction is large, the connection area between the battery cell 2 and the base plate 150 can be better increased by arranging the glue storage cavity 120 on the base plate 150, which helps to better connect the battery cell 2 and the shell 1 into a whole, effectively improving the structural strength of the entire battery pack, and is beneficial to the structural design of the entire battery pack, thereby improving the reliability of the entire battery pack.

[0062] Of course, it should be noted that the specific embodiment in which the above-mentioned glue storage cavity 120 is formed on the bottom plate 150 is exemplary. In other embodiments not shown in the figures, the above-mentioned glue storage cavity 120 can also be formed in the frame 160, so as to increase the connection area between the battery cell 2 and the frame 160, improve the structural strength of the battery pack, and facilitate the structural design of the battery pack.

[0063] For example, Figures 7 to 14 As shown, the bottom plate 150 may include a Figure 7The first plate 151 and the second plate 152 are relatively arranged (in the upper and lower directions of the drawing or the height direction of the battery pack can also be referred to), the first plate 151 and the frame 160 form a receiving groove 110, an exhaust channel 130 is formed between the first plate 151 and the second plate 152, the support portion 140 connects the first plate 151 and the second plate 152, and the first plate 151 is provided with a connecting port 153 connecting the gap 3 and the glue storage cavity 120, so that after the battery pack is filled with glue, the potting glue (glue) flowing through the gap 3 can flow into the glue storage cavity 120 through the above-mentioned connecting port 153, so as to achieve the purpose of connecting the battery cell 2 and the shell 1 into a whole, thereby improving the structural strength of the entire battery pack and being beneficial to the structural design of the entire battery pack.

[0064] Wherein, in some embodiments, reference Figure 8 As shown, the second plate 152 can close the glue storage cavity 120, or, in other embodiments, refer to Figure 11 As shown, a glue filling port 154 connected to the glue storage cavity 120 may also be provided on the second plate 152. The present disclosure does not specifically limit this type of deformation. Its purpose is to be able to fill the gap 3 between the shell 1 and the battery cell 2 and / or the gap 3 between adjacent battery cells 2 with glue while also filling the glue storage cavity 120 with potting glue.

[0065] In addition, considering that the above-mentioned glue filling structure 4 can be formed by foam glue or non-foam glue, when the foam glue or non-foam glue is just injected into the battery pack, the foam glue or non-foam glue is usually a fluid glue liquid, and as the glue liquid is continuously injected, the glue liquid will slowly solidify. Figure 3 、 Figures 7 to 11 As shown, along the third direction (refer to Figure 7 (The up and down directions of the drawing or the height direction of the battery pack can also be referred to) Since the depth of the gap 3 between two adjacent battery cells 2 is usually deep and the width is narrow, if the glue filling operation is performed only from the space on one side of the battery cell 2 and the cover plate 8 of the shell assembly, it is easy for the glue in the gap 3 to not completely flow to the bottom of the gap 3, that is, before it flows into the glue storage cavity 120, the glue will solidify.

[0066] Based on this, in order to ensure that the gap 3 and the glue storage cavity 120 are filled with glue and the battery pack has a high structural strength, in some embodiments, reference Figure 10 and Figure 11As shown, a glue blocking structure 5 is provided between two battery cells 2 adjacent along the first direction and / or along the second direction, so that the glue blocking structure 5 separates the battery cells 2 into a first potting section 6 and a second potting section 7 spaced along the third direction. The first potting section 6 is connected to the space between the multiple battery cells 2 and the cover plate 8 of the shell assembly, and the second potting section 7 is connected to the glue filling port 154 through the glue storage cavity 120. In this way, the glue filling operation can be achieved through the upper and lower sides of the battery pack along the third direction, that is, the first potting section 6 can be potted from the space on one side of the battery cell 2 and the cover plate 8 of the shell assembly, and the second potting section 7 can be potted from the glue filling port 154. In this way, by reducing the glue filling space of the gap 3 between two adjacent battery cells 2, for example, it is beneficial to improve the potting effect, so that the glue can better fill the gap 3 and the area within the glue storage cavity 120, so as to achieve the purpose of connecting the battery cell 2 and the shell 1 into a whole, thereby improving the structural strength of the entire battery pack and being beneficial to the structural design of the entire battery pack.

[0067] The rubber retaining structure 5 can be a rubber retaining foam or rubber block, which has a simple structure and is easy to install and arrange. Furthermore, the present disclosure does not specifically limit the specific structure of the explosion-proof valve 210. For example, the explosion-proof valve 210 can be a piston-type explosion-proof valve, which can be used repeatedly and has low maintenance costs; or, the explosion-proof valve 210 can be a pin-type explosion-proof valve, which is not specifically limited in the present disclosure.

[0068] In addition, in some embodiments, reference Figures 2 to 14 As shown, the first plate 151 may include a plate body, which is used to support multiple battery cells 2 to play a supporting role, and the plate body may be provided with a communication port 153 and an exhaust port 155 for connecting the explosion-proof valve 210 with the exhaust channel 130.

[0069] Or, alternatively, the first plate 151 may include a liquid cooling plate to cool the multiple battery cells 2 through the liquid cooling plate, and can play a role in cooling down when thermal runaway occurs, and a connecting port 153 and an exhaust port 155 for connecting the explosion-proof valve 210 with the exhaust channel 130 may be provided on the liquid cooling plate. The present disclosure does not specifically limit such deformation methods, and those skilled in the art can design adaptively as needed.

[0070] In some embodiments, reference Figure 8 and Figure 11As shown, the glue storage cavity 120 may include a first glue storage section 121 and a second glue storage section 122. The second glue storage section 122 is connected to the gap 3 through the first glue storage section 121. An opening 123 connecting the second glue storage section 122 and the first glue storage section 121 and a stop surface 124 surrounding the opening 123 are provided between the second glue storage section 122 and the first glue storage section 121. The stop surface 124 is arranged toward the second glue storage section 122. While ensuring that the support portion 140 has a high structural strength, by increasing the connection area between the battery cell 2 and the shell 1, it helps to better connect the battery cell 2 and the shell 1 into a whole, effectively improving the structural strength of the entire battery pack, and is beneficial to the structural design of the entire battery pack, thereby improving the reliability of the entire battery pack.

[0071] In addition, in some embodiments, reference Figures 2 to 4 As shown, multiple battery cells 2 can be arranged in columns along the first direction and in rows along the second direction, and the gap 3 can include a first gap 310 located between two adjacent columns of battery cells 2, each first gap 310 is connected to one or more glue storage cavities 120, and a first connecting port connecting the first gap 310 and the glue storage cavity 120 can be provided on the bottom plate 150 of the shell 1. In the first direction, the width of the first connecting port is greater than the width of the first gap 310. Exemplarily, the difference between the width of the first connecting port and the width of the first gap 310 can be 2mm~5mm, so that after the multiple battery cells 2 are stacked and the stacked multiple battery cells 2 are placed in the receiving groove 110, it is convenient to achieve the alignment of the first gap 310 and the first connecting port, ensuring that after the battery pack is filled with glue, the glue flowing through the first gap 310 can flow into the corresponding glue storage cavity 120 through the first connecting port, so as to achieve the purpose of increasing the connection area between the battery cell 2 and the shell 1, thereby improving the structural strength of the battery pack and facilitating the structural design of the battery pack.

[0072] In addition, in some embodiments, reference Figures 2 to 4As shown, the gap 3 may include a second gap 320 located between two adjacent rows of battery cells 2, each second gap 320 is connected to one or more glue storage cavities 120, and a second connecting port connecting the second gap 320 and the glue storage cavity 120 may be provided on the bottom plate 150 of the shell 1. In the second direction, the width of the second connecting port is greater than the width of the second gap 320. Exemplarily, the difference between the width of the second connecting port and the width of the second gap 320 is 2mm~5mm, so that after multiple battery cells 2 are stacked and the stacked multiple battery cells 2 are placed in the receiving groove 110, it is convenient to align the second gap 320 with the second connecting port, ensuring that after the battery pack is glued, the glue flowing through the second gap 320 can flow into the corresponding glue storage cavity 120 through the second connecting port, so as to achieve the purpose of increasing the connection area between the battery cell 2 and the shell 1, thereby improving the structural strength of the entire battery pack and facilitating the structural design of the entire battery pack.

[0073] In addition, in some embodiments, reference Figures 2 to 4 As shown, the gap 3 may also include a third gap 330 located between the battery cell 2 and the side wall of the shell 1, and the third gap 330 is connected to one or more glue storage cavities 120, and a third connecting port connecting the third gap 330 and the glue storage cavity 120 may be provided on the frame 160 and / or the bottom plate 150 of the shell 1, so that the glue flowing through the third gap 330 can flow into the corresponding glue storage cavity 120 via the second connecting port, so as to increase the connection area between the battery cell 2 and the shell 1, thereby improving the structural strength of the battery pack and facilitating the structural design of the battery pack.

[0074] Among them, the width dimension of the first gap 310 formed between the two adjacent battery cells 2 along the first direction and the width dimension of the second gap 320 formed between the two adjacent battery cells 2 along the second direction are not specifically limited in the present disclosure. Those skilled in the art can adaptively design according to the depth of the first gap 310 and the second gap 320 along the third direction. For example, in some embodiments, the width of the first gap 310 along the first direction can be 1mm~5mm, and the width of the second gap 320 along the second direction can be 1mm~5mm, so as to ensure that the glue can fill the first gap 310 and the second gap 320, thereby improving the structural strength and reliability of the entire battery pack.

[0075] In addition, in some embodiments, reference Figures 2 to 15As shown, one or more support portions 140 spaced apart along the second direction are provided at positions corresponding to each first gap 310 in the exhaust channel 130, and each support portion 140 is provided with at least one glue storage cavity 120, so as to better increase the connection area between the battery cell 2 and the shell 1, which helps to improve the structural strength of the entire battery pack and is beneficial to the structural design of the entire battery pack.

[0076] In addition, in some embodiments not shown in the figures, one or more support portions 140 arranged at intervals along the first direction may also be provided at the position corresponding to each second gap 320 in the exhaust channel 130, and each support portion 140 is provided with at least one glue storage cavity 120, so as to further increase the connection area between the battery cell 2 and the shell 1, thereby improving the reliability of the entire battery pack.

[0077] Among them, it should be noted that the external structure, external dimensions and specific arrangement quantity of the above-mentioned support part 140 are not specifically limited in this disclosure. Those skilled in the art can adaptively design the external structure, external dimensions and specific arrangement quantity of the support part 140 according to actual application requirements, for example, according to the width dimension of the gap 3 between multiple battery cells 2 and taking into account the overall good structural strength of the shell 1. The purpose is to increase the connection area between the battery cell 2 and the shell 1 by forming the glue storage cavity 120 in the support part 140, thereby improving the reliability of the entire battery pack.

[0078] In addition, it should be noted that, in order to ensure that the shell 1 has a good structural strength as a whole, the above-mentioned communication port 153, the glue injection port 154 and the exhaust port 155 can all be in the form of Figure 5 and Figure 9 The rectangular array shown exemplarily is arranged in multiple intervals, wherein the spacing size between any two adjacent communication ports 153 or two glue filling ports 154 or two exhaust ports 155 and the opening size of each communication port 153, glue filling port 154 and exhaust port 155 are not specifically limited in this disclosure. Those skilled in the art can design adaptively according to actual application requirements, with the purpose of achieving corresponding glue filling and exhaust while ensuring that the shell 1 as a whole has good structural strength.

[0079] In addition, in some embodiments, reference Figure 8 and Figure 11 As shown, multiple battery cells 2 can be bonded to the first plate 151 through an adhesive layer 9. For example, the adhesive layer 9 can be formed by, for example, structural adhesive, thereby further improving the connection reliability between the battery cells 2 and the shell 1 and improving the reliability of the entire battery pack.

[0080] It should be noted that the battery cell 2 can be constructed, for example, in the form of a battery core, which is the minimum discharge power source in the battery pack and includes a positive and negative electrode separator and a battery cell housing. Alternatively, the battery cell 2 can also be constructed, for example, as a blade battery cell. Alternatively, the battery cell 2 can also be constructed as a battery module, each of which is constructed to include a housing and multiple battery cells disposed within the housing. The battery cell is the minimum discharge power source in the battery pack and includes a positive and negative electrode separator and a battery cell housing. This disclosure does not specifically limit this.

[0081] in addition, Figure 2 It is exemplarily shown that the length direction of the battery cell of each battery cell 2 in the plurality of battery cells 2 arranged in columns along the first direction and in rows along the second direction can be parallel to the above-mentioned first direction, the thickness direction of the battery cell of each battery cell 2 can be parallel to the above-mentioned second direction, and the height direction of the battery cell of each battery cell 2 can be parallel to the above-mentioned third direction. Of course, the above-mentioned arrangement of the battery cells 2 is exemplary. In other embodiments not shown in the figure, the length direction of the battery cell of each battery cell 2 can also be parallel to the above-mentioned second direction, and the thickness direction of the battery cell of each battery cell 2 can be parallel to the above-mentioned first direction, and the height direction of the battery cell of each battery cell 2 can be parallel to the above-mentioned third direction. The present disclosure is not limited to this. Its purpose is to enable a gap 3 to be formed between the plurality of battery cells 2 so as to facilitate filling the glue filling structure 4 into the gap 3 and the glue storage cavity 120 connected to the gap 3. Those skilled in the art can adaptively stack the plurality of battery cells 2 according to their needs.

[0082] According to a fourth aspect of the present disclosure, an electrical device is provided, comprising the battery pack provided in the second aspect or the battery pack provided in the third aspect. Furthermore, the electrical device has all the beneficial effects of the battery pack provided in the second aspect or the battery pack provided in the third aspect, which are not further elaborated herein.

[0083] In some exemplary application scenarios, the above-mentioned electrical equipment may be a vehicle, wherein the vehicle may be a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc., and this disclosure does not make any specific limitations on this.

[0084] Of course, in other application scenarios, the above-mentioned electrical equipment can also be vehicles that need to be powered by battery packs, such as in the energy storage field, aerospace or water transportation.

[0085] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0086] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0087] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A battery pack housing assembly, characterized in that: The invention comprises a shell having an accommodating groove for accommodating a plurality of battery cells, a glue storage cavity in the wall of the shell, and the glue storage cavity is used to communicate with the gap between two adjacent battery cells and / or between the battery cell and the shell.

2. The battery pack housing assembly according to claim 1, wherein: An exhaust channel is provided in the wall of the shell, and the exhaust channel is used to communicate with the explosion-proof valve of the battery cell. A support portion connecting two opposite inner walls of the exhaust channel is provided in the exhaust channel, and the glue storage cavity is formed on the support portion.

3. The battery pack housing assembly according to claim 2, wherein: The shell includes a bottom plate and a frame arranged on the bottom plate, the bottom plate and the frame surround the accommodating groove, and the exhaust channel is arranged in the bottom plate.

4. The battery pack housing assembly according to claim 3, wherein: The bottom plate includes a first plate and a second plate arranged opposite to each other along a third direction, the first plate and the frame enclosing the accommodating groove, the exhaust channel being formed between the first plate and the second plate, the supporting portion connecting the first plate and the second plate, and a connecting port connecting the gap and the glue storage cavity being provided on the first plate; Wherein, the second plate closes the glue storage cavity; or The second plate is provided with a glue filling port connected to the glue storage cavity.

5. The battery pack housing assembly according to claim 4, wherein: The first plate includes a plate body, and the plate body is provided with the communication port and an exhaust port for connecting the explosion-proof valve with the exhaust channel; or, The first plate includes a liquid cooling plate, and the liquid cooling plate is provided with the communication port and an exhaust port for connecting the explosion-proof valve with the exhaust channel.

6. The battery pack housing assembly according to any one of claims 1 to 5, characterized in that: The glue storage cavity includes a first glue storage section and a second glue storage section. The second glue storage section is connected to the gap through the first glue storage section. An opening connecting the second glue storage section and the first glue storage section and a stop surface surrounding the opening are provided between the second glue storage section and the first glue storage section. The stop surface is arranged toward the second glue storage section.

7. A battery pack, characterized in that: The housing assembly comprises the housing assembly according to any one of claims 1 to 6.

8. A battery pack, characterized in that: include: Multiple battery cells; The housing has a receiving groove for receiving the plurality of battery cells, a gap is formed between two adjacent battery cells and / or between the battery cells and the housing, and a glue storage cavity is provided in the wall of the housing and is connected to the gap; as well as The glue filling structure is filled in the gap and the glue storage cavity.

9. The battery pack according to claim 8, characterized in that: An exhaust channel connected to the explosion-proof valve of the battery cell is provided in the wall of the shell. A support portion connecting two opposite inner walls of the exhaust channel is provided in the exhaust channel, and the glue storage cavity is formed on the support portion.

10. The battery pack according to claim 9, characterized in that: The plurality of battery cells are arranged in columns along a first direction and in rows along a second direction; The gaps include first gaps between two adjacent rows of battery cells, and each of the first gaps is connected to one or more of the glue storage cavities; and / or, The gaps include second gaps between two adjacent rows of battery cells, and each of the second gaps is connected to one or more of the glue storage cavities; and / or, The gap includes a third gap located between the battery cell and the side wall of the shell, and the third gap is connected to one or more of the glue storage cavities.

11. The battery pack according to claim 10, characterized in that: One or more support portions spaced apart along the second direction are provided at positions corresponding to each of the first gaps in the exhaust channel, and each support portion is provided with at least one glue storage cavity; and / or, One or more support portions spaced apart along the first direction are provided at positions corresponding to each of the second gaps in the exhaust channel, and each of the support portions is provided with at least one glue storage cavity.

12. The battery pack according to claim 10, wherein: The housing is provided with a first communication port communicating with the first gap and the glue storage cavity, and in the first direction, the width of the first communication port is greater than the width of the first gap; and / or, The housing is provided with a second communication port communicating with the second gap and the glue storage cavity. In the second direction, the width of the second communication port is greater than the width of the second gap.

13. The battery pack according to claim 12, wherein: The difference between the width of the first communication opening and the width of the first gap is 2 mm to 5 mm; and / or, The difference between the width of the second communication port and the width of the second gap is 2 mm to 5 mm.

14. The battery pack according to claim 10, characterized in that: The width of the first gap along the first direction is 1 mm to 5 mm, and / or the width of the second gap along the second direction is 1 mm to 5 mm.

15. The battery pack according to any one of claims 9 to 14, characterized in that: The shell includes a bottom plate and a frame arranged on the bottom plate, the bottom plate and the frame surround the accommodating groove, and the exhaust channel is arranged in the bottom plate.

16. The battery pack according to claim 15, characterized in that: The bottom plate includes a first plate and a second plate arranged opposite to each other along a third direction, the first plate and the frame enclosing the accommodating groove, the exhaust channel being formed between the first plate and the second plate, the supporting portion connecting the first plate and the second plate, and a connecting port connecting the gap and the glue storage cavity being provided on the first plate; Wherein, the second plate closes the glue storage cavity; or The second plate is provided with a glue filling port connected to the glue storage cavity.

17. The battery pack according to claim 16, wherein: A glue blocking structure is provided between two battery cells adjacent along the first direction and / or along the second direction, so that the battery cells are separated into a first potting section and a second potting section spaced along a third direction by the glue blocking structure. The first potting section is connected to the space between the multiple battery cells and the cover plate of the shell assembly, and the second potting section is connected to the glue filling port through the glue storage cavity.

18. The battery pack according to claim 17, characterized in that: The glue blocking structure is a glue blocking foam or a glue blocking rubber block.

19. The battery pack according to claim 8, wherein: The glue-filling structure is formed by foaming glue or non-foaming glue.

20. An electrical device, characterized in that: Including the battery pack according to claim 7 or the battery pack according to any one of claims 8-19.

Images