Shell assembly, power storage device and electric equipment

Abstract

The utility model provides a shell assembly, an electricity storage device and electric equipment, the shell assembly comprises a shell and an electric connecting piece which are fixedly connected, and the electric connecting piece comprises a first part, a second part and a third part which are sequentially arranged in the length direction of the electric connecting piece. The first part is at least partially located in the external space of the shell, and the third part is at least partially located in the internal space of the shell. The wall body of the shell is provided with a channel extending from the inner space to the outer space. The second part is embedded in the channel, and the inner surface of the channel wraps the outer surface of the second part. A bonding body is arranged between the outer surface of the second part and the inner surface of the channel, and the bonding body is bonded with the outer surface of the second part and the inner surface of the channel. The bonding body is bonded with the outer surface of the second part and the inner surface of the channel, and the elastic deformation of the bonding body is utilized to compensate the deformation quantity difference between the electric connecting piece and the shell, so that the formation of a small gap is avoided, the occurrence of a leakage path is further avoided, and the sealing performance of the power storage device is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of batteries, and in particular, to a housing assembly of an electricity storage device, an electricity storage device having the housing assembly, and an electricity consuming device having the electricity storage device. BACKGROUND

[0002] An electricity storage device (also referred to as a battery pack) is a device capable of storing and releasing electric energy. The electricity storage device generally comprises a housing, a battery module, and an electrical connector. The battery module is the core part of the electricity storage device, which stores and releases electric energy through electrochemical reactions. The housing houses the battery module therein, providing protection and support for the battery module. The housing is generally assembled by a plurality of housings. In some cases, the housing can also be composed of only one integrally formed housing. The electrical connector, also known as a terminal, extends from the inside of the housing to the outside of the housing to electrically connect the battery module with a power source or an electricity consuming device. The housing and the electrical connector can be fixedly connected (e.g., in a molded manner) together to form an integral whole, which is referred to as a housing assembly.

[0003] However, it is difficult to seal the joint between the electrical connector and the housing, and there is a risk that contaminants such as liquid will penetrate into the housing through the joint between the electrical connector and the housing, thereby damaging the electricity storage device. UTILITY MODEL CONTENT

[0004] In view of the above, the present disclosure improves the structure of the housing assembly to reduce the risk that contaminants such as liquid will penetrate into the housing through the joint between the housing and the electrical connector, thereby damaging the electricity storage device.

[0005] In one aspect, the present disclosure provides a housing assembly of an electricity storage device.

[0006] The housing assembly comprises a housing and an electrical connector fixedly connected. The electrical connector comprises a first portion, a second portion, and a third portion arranged in sequence along the length direction thereof. The first portion is at least partially located in an external space of the housing, and the third portion is at least partially located in an internal space of the housing. A wall of the housing is provided with a channel extending from the internal space to the external space, the second portion is embedded in the channel, an inner surface of the channel covers an outer surface of the second portion, and an adhesive body is provided between the outer surface of the second portion and the inner surface of the channel, the adhesive body being adhered to the outer surface of the second portion and the inner surface of the channel.

[0007] The present disclosure provides an adhesive body between the housing and the electrical connector, the adhesive body being adhered to the inner surface of the channel and the outer surface of the second portion, and compensating for the difference in deformation amount between the electrical connector and the housing by its own elastic deformation, thereby avoiding the formation of a small gap and the occurrence of a leakage path, and improving the sealing performance of the electricity storage device.

[0008] Additionally or alternatively, the adhesive body extends along a width direction of the electrical connector on the outer surface of the second portion, i.e. the adhesive body continuously extends around the outer periphery of the second portion.

[0009] The adhesive body forms a complete blockage in the circumferential direction of the electrical connector, avoiding a leakage path bypassing the adhesive body.

[0010] Additionally or alternatively, the adhesive body is continuously wound on the outer surface of the second portion, and the number of winding turns of the adhesive body is N, 2≤N≤10.

[0011] The process of winding the layered adhesive body on the electrical connector is simple and easy to implement. The multiple winding turns of the adhesive body increase the thickness of the adhesive body, while the adhesive agent has good retention capacity, which can achieve better sealing effect.

[0012] Additionally or alternatively, the adhesive body comprises a substrate and an adhesive agent attached to the substrate.

[0013] The substrate can keep the adhesive agent attached to the substrate in a predetermined position and state, avoiding the adhesive body from leaving the predetermined position, even being washed away and dispersed, affecting the sealing effect.

[0014] Additionally or alternatively, the substrate is configured as a substrate layer, the adhesive agent is configured as a first adhesive agent layer and a second adhesive agent layer, and the first adhesive agent layer, the substrate layer and the second adhesive agent layer are sequentially stacked in the thickness direction of the adhesive body.

[0015] The layered structure allows a larger contact area between the substrate and the adhesive agent, which can improve the retention capacity of the substrate layer on the position and state of the adhesive agent.

[0016] Additionally or alternatively, the adhesive agent is an acrylic adhesive agent layer, and the substrate is a non-woven fabric.

[0017] The acrylic adhesive agent layer has super strong adhesion, stability and temperature resistance, which can provide better adhesion effect. The non-woven fabric has good flexibility, temperature resistance and resilience, which can maintain the shape of the adhesive body.

[0018] Additionally or alternatively, the second portion is provided with a recess, and at least part of the adhesive body is embedded in the recess.

[0019] The recess can help the operator or the machine to position the winding position of the adhesive body, and can make the adhesive body in the recess maintain a predetermined position during molding.

[0020] Additionally or alternatively, the recess is a notch formed on any one edge of the second portion in the width direction of the electrical connector.

[0021] The notch makes the adhesive body maintain a predetermined position during molding, while having a smaller impact on the flow capacity of the electrical connector.

[0022] Additionally or alternatively, the depth of the gap is greater than the thickness of the portion of the adhesive body located in the gap.

[0023] The contact area between the shell and the electrical connector is increased, and a clamping connection can also be formed to enhance the connection strength between the electrical connector and the shell.

[0024] Additionally or alternatively, the second portion has a size in the length direction that is greater than a size of the adhesive body in the length direction.

[0025] At least part of the shell is in direct contact with the second portion to achieve a fixed connection between the shell and the electrical connector and to ensure a certain connection strength.

[0026] Additionally or alternatively, the second portion includes a first segment, a second segment, and a third segment arranged in sequence in the length direction, the second segment is covered by the adhesive body, and the first segment and the third segment are directly covered by the shell.

[0027] According to this configuration, the joint between the shell and the electrical connector will have more excellent sealing performance. Moreover, according to this configuration, the joint can maintain such excellent sealing performance after a relatively long period of use. The reason is that the second segment covered by the adhesive body is located between the first segment and the third segment, and thus the second segment is neither located in the internal space nor in the external space. The cooperation between the first segment and the shell can avoid or reduce the pollution of dust and the like from the internal space to the adhesive body, and the cooperation between the third segment and the shell can avoid or reduce the pollution of dust and the like from the external space to the adhesive body. In this way, dust and the like will be difficult or less likely to directly contact the adhesive body, avoiding the loss of adhesion of the adhesive body due to pollution by dust and the like. The loss of adhesion of the adhesive body will deteriorate the sealing performance of the joint between the shell and the electrical connector, especially after a relatively long period of use.

[0028] Additionally or alternatively, the size of the second portion in the length direction is D, D≥2mm; and / or, the size of the first segment in the length direction is D1, 0.1≤D1 / D≤0.4; and / or, the size of the second segment in the length direction is D2, 0.3≤D2 / D≤0.7; and / or, the size of the third segment in the length direction is D3, 0.1≤D3 / D≤0.4.

[0029] Under such parameter settings, the shell assembly can ensure good waterproof and dustproof effects and connection strength.

[0030] Additionally or alternatively, the second portion is in the shape of a flat sheet.

[0031] The space occupied by the shell portion covering the second portion is small, which can be well applied to scenarios with limited space.

[0032] Additionally or alternatively, in the thickness direction of the electrical connector, the shortest distance from the second portion to the surface of the housing is T, 1mm≤T≤10mm.

[0033] The electrical connector and the housing are less likely to form a leakage path, and the housing is less likely to warp.

[0034] Additionally or alternatively, the electrical connector is in the shape of a flat plate. The first portion has a first surface portion and a second surface portion, the first surface portion and the second surface portion are located on opposite sides of the first portion in the thickness direction of the electrical connector, the first surface portion is located in the external space of the housing, and the second surface portion is covered by the housing. The third portion has a third surface portion and a fourth surface portion, the third surface portion and the fourth surface portion are located on opposite sides of the second portion in the thickness direction, the third surface portion is located in the internal space of the housing, and the fourth surface portion is covered by the housing, wherein the first surface portion and the third surface portion are located on different sides of the electrical connector in the thickness direction.

[0035] The shortest leakage path needs to surround the outer periphery of the second portion, increasing the length of the leakage path, reducing the risk of leakage, and improving the sealing effect.

[0036] On the other hand, the present disclosure also provides an electrical storage device. The electrical storage device includes the above-mentioned housing assembly.

[0037] On the other hand, the present disclosure also provides an electrical device. The electrical device includes the above-mentioned electrical storage device. BRIEF DESCRIPTION OF DRAWINGS

[0038] It should be understood that the following drawings only show certain embodiments of the present disclosure and should not be considered as limiting the scope.

[0039] It should be understood that the same or similar reference signs are used to represent the same or similar elements in the drawings.

[0040] It should be understood that the drawings are only schematic and the sizes and proportions of the elements in the drawings are not necessarily precise.

[0041] It should be understood that the following drawings only show certain embodiments of the present disclosure and should not be considered as limiting the scope.

[0042] It should be understood that the same or similar reference signs are used to represent the same or similar elements in the drawings.

[0043] It should be understood that the drawings are only schematic and the sizes and proportions of the elements in the drawings are not necessarily precise.

[0044] Figure 1 Structure diagram of an electrical storage device according to an embodiment of the present disclosure.

[0045] Figure 2 It is shownFigure 1 schematic view of the decomposition of the power storage device in FIG.

[0046] Figure 3 schematic view of the decomposition of the power storage device in FIG. Figure 1 schematic view of the decomposition of the power storage device in FIG.

[0047] Figure 4 schematic view of the decomposition of the power storage device in FIG. Figure 1 schematic view of the decomposition of the power storage device in FIG.

[0048] Figure 5 schematic view of the decomposition of the power storage device in FIG. Figure 4 schematic view of the decomposition of the power storage device in FIG.

[0049] Figure 6 schematic view of the decomposition of the power storage device in FIG. Figure 2 schematic view of the decomposition of the power storage device in FIG.

[0050] Figure 7 schematic view of the decomposition of the power storage device in FIG. Figure 6 schematic view of the decomposition of the power storage device in FIG.

[0051] Figure 8 schematic view of the decomposition of the power storage device in FIG. Figure 7 schematic view of the decomposition of the power storage device in FIG.

[0052] Figure 9 schematic view of the decomposition of the power storage device in FIG. Figure 7 schematic view of the decomposition of the power storage device in FIG.

[0053] Figure 10 schematic view of the decomposition of the power storage device in FIG.

[0054] Figure 11 schematic view of the decomposition of the power storage device in FIG. Figure 10 schematic view of the decomposition of the power storage device in FIG.

[0055] Figure 12 schematic view of the decomposition of the power storage device in FIG. Figure 10 schematic view of the decomposition of the power storage device in FIG.

[0056] Figure 13 schematic view of the decomposition of the power storage device in FIG.

[0057] Explanation of reference numerals: 100, power storage device; 10, housing; 11, upper housing; 12, lower housing; 13, inner surface of passage; 20, battery module; 21, tab holder; 30, BMS protection board; 31, total positive terminal; 32, total negative terminal; 33, second hole; 40, electrical connector; 41, first portion; 411, first surface portion; 412, second surface portion; 413, first hole; 42, second portion; 421, first segment; 422, second segment; 423, third segment; 43, third portion; 431, third surface portion; 432, fourth surface portion; 433, third hole; 44, notch; 45, groove; 46, outer surface of second portion; 50, pole; 501, cap portion; 502, columnar portion; 51, bolt; 52, connecting sleeve; 60, adhesive body; 61, base material layer; 62, first adhesive layer; 63, second adhesive layer; 64, leading end; 65, trailing end; x, length direction; y, thickness direction; z, width direction; 200, power consuming device. DETAILED DESCRIPTION

[0058] Some power storage devices include an electrical connector and a housing that are molded together. For such power storage devices, there is a problem that contaminants penetrate into the housing via the joint of the electrical connector and the housing, damaging the power storage device.

[0059] The inventors found that the cause of this technical problem is that, during the cooling process after molding, the cooling speeds of the housing and the electrical connector are different, and the expansion coefficients of the two are also different, so there is a slight difference in the deformation amount of the two. This difference can cause some small gaps to be generated at the joint of the electrical connector and the housing, i.e., between the outer surface of the electrical connector and the inner surface of the passage through which the electrical connector passes in the housing. These small gaps can form a leakage path. Contaminants such as liquids can enter the inside of the housing through this leakage path, contaminating the BMS protection board and the battery module, etc., and causing the power storage device (also referred to as a battery pack, or a start-stop battery pack, or a power battery pack, or an energy storage module, etc.) to be damaged.

[0060] As an attempt to improve the sealing performance at the joint, the portion of the electrical connector that is covered by the housing can have a bent, folded-back configuration. The purpose of this is to increase the area of the outer surface of the second portion of the electrical connector, lengthen the leakage path, and thus reduce the risk of leakage occurring. However, this approach results in the portion of the electrical connector that is covered by the housing occupying a large amount of space. In scenarios where space is limited, the portion of the electrical connector that is covered by the housing needs to have a small volume, and this approach is difficult to apply.

[0061] As another attempt to improve the sealing performance at the junction, the outer surface of the electrical connector can be treated. For example, the roughness of the outer surface can be increased by sandblasting or grinding. The purpose of doing so is to help the electrical connector and the housing to bind more closely. However, it is found that this approach helps little in improving the sealing performance at the junction, and it is often difficult to eliminate the risk of leakage, especially when the area of the outer surface of the second portion of the electrical connector is small.

[0062] As another attempt to improve the sealing performance at the junction, an additive such as polyurethane can be applied to the outer surface of the second portion of the electrical connector, and the molding process is performed after the additive is cured. However, this attempt does not achieve the expected results, and the sealing performance at the junction between the electrical connector and the housing does not improve significantly, and the risk of leakage still exists, especially when the area of the outer surface of the second portion of the electrical connector is small.

[0063] As another attempt to improve the sealing performance at the junction, an elastic seal (such as a rubber seal ring) can be fitted on the electrical connector and molded in the housing. In this approach, the elastic seal is expected to be deformed under pressure between the inner surface of the passage and the outer surface of the second portion of the electrical connector, thereby achieving sealing. On the one hand, it is found that this approach does not significantly improve the sealing performance at the junction. One reason is that after curing, the housing and the electrical connector cannot provide the elastic seal with sufficient pressure to deform under pressure. The second reason is that the cross-sectional shape of the electrical connector is usually polygonal (such as rectangular), which causes the elastic seal to be deformed under pressure mainly at the edges of the electrical connector, and not sufficiently deformed under pressure at the flat surfaces of the electrical connector. On the other hand, the elastic seal occupies additional space, increasing the volume of the covered portion of the housing, and is also difficult to apply in space-limited scenarios.

[0064] How to improve the sealing performance at the junction between the electrical connector and the housing, and avoid the penetration of contaminants into the housing through the junction to damage the power storage device, especially when the area of the outer surface of the second portion of the electrical connector is small, has been a problem for those skilled in the relevant art.

[0065] To solve this problem, after implementing various attempts including the above approaches, the inventors creatively proposed a scheme of providing an adhesive body between the inner surface of the passage and the outer surface of the second portion of the electrical connector. The addition of the adhesive body improves the sealing performance at the junction between the housing and the electrical connector, and reduces the risk of contaminants entering the interior of the housing through the junction. Moreover, this approach does not require the covered portion of the electrical connector to have a large area, and thus can be applied in space-limited scenarios.

[0066] The scheme provided by the present disclosure will be illustrated below with reference to specific embodiments and their accompanying drawings.

[0067] Many specific details are set forth in the following description in order to provide an understanding of the structures, functions, and use of the embodiments described and shown in the specification. It will be understood that the embodiments described and shown herein are non-limiting examples, and that the particular structural and functional details disclosed herein are representative and exemplary. Embodiments can be modified and changed without departing from the scope of the claims.

[0068] <Example power storage device>

[0069] The embodiments of the present disclosure provide a power storage device. For the convenience of understanding, the overall structure of the power storage device according to the present disclosure will be described first. It should be understood that the structure of the power storage device should not be limited to the following description. For example, one or more elements introduced below can be omitted or replaced, and the layout relationship between them can be replaced.

[0070] Reference Figure 1 And Figure 2 The power storage device 100 can include a housing 10, a battery module 20, and a BMS protection board 30.

[0071] The housing 10 can include a plurality of casings 11, 12. The plurality of casings 11, 12 can be assembled together to form a cavity. The battery module 20, the BMS protection board 30, and the like can be accommodated in the cavity to be supported and protected by the housing 10. For example, the plurality of casings 11, 12 can include a casing 11 and a casing 12. The casing 11 can be referred to as an upper casing, and the casing 12 can be referred to as a lower casing.

[0072] It can be understood that here, up and down do not necessarily mean that the casing 11 is higher than the casing 12 in the direction of gravity in the use scenario. It can be understood that in other examples, the housing 10 can be composed of three or more casings assembled together, or the housing 10 can also be composed of only one integrally formed casing.

[0073] The battery module 20 can be understood as a device that occurs electrochemical reaction, which can be composed of a plurality of battery cells in series and parallel connection. The plurality of battery cells can be stacked in one direction. The packaging mode of the battery cell can be soft package, square hard shell, or cylindrical. The battery cell can be a lead-acid battery cell, a nickel-cadmium battery cell, a nickel-hydrogen battery cell, a lithium-ion battery cell, and the like.

[0074] The battery module 20 can further include a tab holder 21. The tab is a metal conductor that is led out from the positive and negative electrodes of the battery cell. The tab holder 21 can position, guide and support a plurality of tabs, simplify the assembly process of the power storage device 100, and improve assembly efficiency. The tab holder 21 can also fix and protect the tabs to prevent the tabs from moving or falling off during use. The tab holder 21 can be located on the side of the battery cell where the tabs are provided. The tab holder 21 and the plurality of tabs can be electrically connected by welding, rivets or screws, connectors, and the like, thereby forming a total positive electrode and a total negative electrode on the tab holder 21. The tab holder 21 can not be necessary, and in the case where the tab holder 21 is not provided, the tabs of the plurality of battery cells can be welded together by lapping, thereby forming a total positive electrode and a total negative electrode of the plurality of battery cells.

[0075] The BMS protection board 30 can include a total positive terminal 31 and a total negative terminal 32, and can further include a control chip, a voltage detection circuit, a current detection circuit, a temperature detection circuit, and the like. The BMS protection board 30 can be used to improve the utilization rate of the power storage device, prevent overcharging and overdischarging of the power storage device, prolong the service life of the power storage device, and monitor the state of the power storage device, to ensure that the power storage device works safely, stably and efficiently. The BMS protection board 30 can be located on the side of the tab holder 21 away from the battery cell. The BMS protection board 30 and the total positive electrode and the total negative electrode of the tab holder 21 can be electrically connected by plug-in, welding or riveting, and the like. In the case where there is no tab holder 21, the BMS protection board 30 can be electrically connected to the total positive electrode and the total negative electrode of the plurality of battery cells by the above-mentioned methods.

[0076] <Example shell assembly>

[0077] The power storage device 100 can further include an electrical connector 40. The electrical connector 40 is used to electrically connect with the components inside the power storage device, and to electrically connect with the external conductor, for example, it can be electrically connected with the total positive terminal 31 and the total negative terminal 32 of the BMS protection board 30 inside the power storage device, and it can be electrically connected with the electrical connector of the power supply or the electrical equipment outside the power storage device. The electrical connector 40 can have two, one as the positive electrode of the power storage device, and one as the negative electrode of the power storage device.

[0078] As described above, the electrical connector 40 can be fixedly connected with the shell, for example, by molding (for example, injection molding) to be fixed with the shell 11 to form a shell assembly. For example, Figures 3 to 6As shown, the electrical connector 40 includes a first portion 41, a second portion 42, and a third portion 43 arranged sequentially along its length. The first portion 41 is at least partially located in the external space of the housing 11, the third portion 43 is at least partially located in the internal space of the housing 11, and the second portion 42 between them is covered by the housing 11. In this document, the internal space of the housing 11 refers to the side where the cavity is located, and the external space of the housing 11 refers to the side where the external space of the energy storage device 100 is located.

[0079] like Figure 4 and Figure 5 As shown, the wall of the housing 11 has a channel extending from the internal space to the external space. The second part 42 can be embedded in this channel, and the inner surface 13 of the channel covers the outer surface 46 of the second part 42. An adhesive 60 is provided between the outer surface 46 of the second part 42 and the inner surface 13 of the channel. The adhesive 60 is bonded to the outer surface 26 of the second part and the inner surface 13 of the channel. That is, after the molding process, i.e., after the housing 11 has cured, the adhesive 60 still has adhesiveness, or tackiness, and it is bonded to both the inner surface 13 and the outer surface 46. For example, in the disassembly experiment after curing, the adhesive 60 exhibits tackiness, adhering to the inner surface 13 and the outer surface 46 through adhesiveness.

[0080] The adhesive 60 can penetrate and fill the tiny pores and depressions between the inner surface 13 of the channel and the outer surface 46 of the second part 42, adhering to the inner surface 13 and the outer surface 46 through adhesiveness. Furthermore, the adhesive 60 possesses a certain degree of elasticity. During the curing process after molding, although the inner surface 13 and the outer surface 46 may partially move away due to the different deformations of the electrical connector 40 and the housing 11, the adhesive 60 will maintain its adhesion to both surfaces and utilize its own elastic deformation to compensate for the deformation differences between the electrical connector 40 and the housing 11, thereby preventing the formation of micro-gaps and thus avoiding leakage paths. Studies have found that even when the area of ​​the outer surface 46 of the second part 42 of the electrical connector 40 is small, i.e., when the second part 42 is short, this method still exhibits good sealing performance at the junction of the electrical connector 40 and the housing 11. Moreover, this method does not require the portion of the housing 11 covering the electrical connector 40 to have a large size. Therefore, this approach is well-suited for scenarios with limited space.

[0081] For ease of understanding, the length direction of the electrical connector 40 is indicated by arrow x in the accompanying drawings of this disclosure. Additionally, the width and thickness directions of the electrical connector 40, which will be mentioned hereinafter, are also indicated by arrows y and z, respectively, in the drawings. It is to be understood that, herein, the dimension of the electrical connector 40 in the length direction is not necessarily smaller than its dimension in the width direction.

[0082] To illustrate this example, in order to achieve an electrical connection with external electrical equipment or power source, such as... Figure 3 and Figure 6 As shown, the energy storage device 100 may further include a terminal post 50. The cap 501 of the terminal post 50 may be molded between the housing 11 and the first portion 41, while the columnar portion 502 of the terminal post 50 may extend through a first hole 413 on the first portion 41 into the external space of the housing 11. An electrical connector for an external electrical device or power source may pass through the terminal post 50 and be stacked with the first portion 41. The terminal post 50 may have threads, and a nut may be screwed into the threads of the terminal post 50 to press the first portion 41 and the electrical connector for the external electrical device or power source together, achieving both mechanical and electrical connection.

[0083] To achieve electrical connection between electrical connector 40 and BMS protection board 30, for example... Figure 2 and Figure 4 As shown, the main positive terminal 31 (or main negative terminal 32) on the BMS protection board 30 can be stacked with the third part 43. The main positive terminal 31 (or main negative terminal 32) and the third part 43 can be fixedly connected by bolts 51. Specifically, a connecting sleeve 52 can be provided inside the housing 11 (for example, the connecting sleeve 52 is embedded in the housing 11 by molding), and the inner surface of the connecting sleeve 52 can be provided with threads. The main positive terminal 31 (or main negative terminal 32) is provided with a second hole 33, and the third part 43 is provided with a third hole 433. The bolt passes through the second hole 33 of the main positive terminal 31 and the third hole 433 of the third part 43 in sequence, and extends into the connecting sleeve 52 inside the housing 11. A tool such as a screwdriver can be used to tighten the bolt 51 by passing through the hole on the housing 11 that is opposite to the connecting sleeve 52. After removing the screwdriver, the hole can be sealed with a plug, and the plug can be covered with sealant to achieve a seal on the housing 11. It is understood that the connection method between the electrical connector 40 and the BMS protection board 30, and between the electrical connector 40 and the external electrical equipment or power supply, is not limited to the above-mentioned method. Other methods, such as welding, plugging, riveting, etc., are acceptable as long as they enable electrical connection between the electrical connector 40 and the BMS protection board 30, and between the electrical connector 40 and the external electrical equipment or power supply.

[0084] like Figure 7 As shown, the adhesive 60 extends along the width direction of the electrical connector on the outer surface of the second part 42, meaning the adhesive 60 continuously extends around the outer periphery of the second part 42. In other words, the adhesive 60 forms a closed shape between the housing 11 and the second part 42. This means that the adhesive 60 forms a complete seal in the circumferential direction of the electrical connector 40, preventing contaminants such as liquids from leaking into the housing by bypassing the adhesive 60. Therefore, this configuration helps to further improve the sealing performance at the joint.

[0085] In the molding process of the above embodiment, the shell 11 is molded on the second part 42 to cover the second part 42. The material of the shell 11 is at a high temperature and a certain pressure is applied to the shell 11 and the second part 42 to ensure that the material of the shell 11 is tightly combined with the second part 42. In this process, the adhesive body 60 is easily deformed, deviated from the preset position, even washed away and scattered by the temperature and pressure of the material of the shell 11, which affects the sealing effect.

[0086] To avoid this situation, the adhesive body 60 can include a base material and an adhesive attached to the base material. The base material can keep the adhesive attached to the base material in a predetermined position and shape. Further, the base material can have a certain elasticity, which can improve the elasticity of the adhesive body 60 as a whole, and the elasticity can enable the adhesive body 60 to fill the gap caused by the shrinkage of the shell 11 during cooling.

[0087] The material of the adhesive is not particularly limited in the present disclosure, as long as it can maintain adhesion after the shell 11 is cured and has appropriate elasticity. That is, the adhesive can be an adhesive body that has both adhesion and elasticity. As an example, the adhesive can be a pressure-sensitive adhesive, which is a viscoelastic body that has both the adhesion property of a liquid and the elasticity property of a solid; such a viscoelastic body has both the influencing factors and properties of the contact process and the destruction process of adhesion, which can greatly help the sealing of the joint between the shell 11 and the electrical connector 40. As a further example, the adhesive can be an acrylic adhesive layer, which has super adhesion, stability and temperature resistance, and can provide better adhesion. In the disclosure, the adhesive can be, but is not limited to, selected from one or more of a rubber-based adhesive, an acrylic adhesive, an acrylic resin-based adhesive, a silicone-based adhesive, or a polyvinyl ether-based adhesive.

[0088] The material of the base material is not particularly limited in the present disclosure, as long as it can help maintain the position and shape of the adhesive. In one example, the base material can be a non-woven fabric, which has good flexibility, temperature resistance and resilience, and can maintain the position and shape of the adhesive. In other examples, the base material can also be, but is not limited to, selected from one or more of paper, plastic film or non-woven fabric.

[0089] Further, as Figure 9As shown, the substrate is configured as a substrate layer 61, and the adhesive is configured as a first adhesive layer 62 and a second adhesive layer 63. The first adhesive layer 62, the substrate layer 61, and the second adhesive layer 63 are sequentially stacked in the thickness direction of the bonding body 60. By dividing the adhesive into two layers, each layer of adhesive has a smaller thickness, and the adhesive layer can better maintain its shape. The first adhesive layer 62 can be bonded between the electrical connector 40 and the substrate layer 61, and the first adhesive layer 62 can be bonded between the housing 11 and the substrate layer 61. The layered structure allows for a larger contact area between the substrate and the adhesive, which can improve the ability of the substrate layer 61 to maintain the position and state of the adhesive. The layered structure also allows for a larger contact area between the adhesive and the housing 11 and the electrical connector 40, which can achieve better adhesion.

[0090] As shown in FIGS. 1 and 2, the bonding body 60 is wrapped around the outer periphery of the second portion 42, that is, the leading end 64 and the trailing end 65 of the bonding body 60 are not connected together. If the bonding body 60 itself is a closed structure, that is, the leading end 64 and the trailing end 65 are connected together. It requires a relatively complex process to wrap the bonding body 60 on the electrical connector 40. Alternatively, forming a closed bonding body 60 on the electrical connector 40 also requires a relatively complex process. Therefore, by wrapping the layered bonding body 60 around the electrical connector, the process is simple and easy to implement. Figure 7 Figure 8 As shown in FIGS. 1 and 2, the bonding body 60 is wrapped around the outer periphery of the second portion 42, that is, the leading end 64 and the trailing end 65 of the bonding body 60 are not connected together. If the bonding body 60 itself is a closed structure, that is, the leading end 64 and the trailing end 65 are connected together. It requires a relatively complex process to wrap the bonding body 60 on the electrical connector 40. Alternatively, forming a closed bonding body 60 on the electrical connector 40 also requires a relatively complex process. Therefore, by wrapping the layered bonding body 60 around the electrical connector, the process is simple and easy to implement.

[0091] Further, the bonding body 60 is continuously wrapped around the outer surface of the second portion, and the number of wraps of the bonding body 60 is N, 2≤N≤10. The bonding body 60 needs to have a certain thickness. If only one layer is wrapped, the thickness of the adhesive layer needs to be large to meet the thickness requirement, which will weaken the ability of the substrate layer 61 to maintain the adhesive. In addition, wrapping multiple layers will also have better elasticity. If the number of wraps is too large, the substrate layer and the adhesive layer will be too thin. The problem of being too thin is that the adhesive layer is too thin and lacks adhesion. The advantage of wrapping 2 to 4 layers is that the thickness of the adhesive layer is not too thick or too thin, and the thickness is moderate, while the overall thickness of the bonding body 60 is sufficient, and the sealing performance is good. The bonding body 60 wrapped on the outer layer can protect the inner layer of the bonding body 60 to a certain extent, avoiding affecting the state and position of the inner layer of the bonding body 60 during molding, so that the adhesive can be maintained in the predetermined position and shape. At the same time, the bonding body 60 wrapped 2 to 4 times has multiple substrate layers 61, which can improve the overall structural elasticity of the bonding body 60 and improve the sealing effect. Wrapping the bonding body 60 multiple times improves the thickness of the bonding body 60, and the adhesive has good maintaining ability, which can achieve better sealing effect.

[0092] ​Further, the second portion 42 is provided with a recess in which the at least part of the adhesive body 60 is embedded. The recess can help the operator or the machine to locate the position of the wound adhesive body 60. Meanwhile, the recess can keep the adhesive body 60 in the predetermined position during the molding process, avoiding the adhesive body 60 from moving away from the predetermined position under the impact of the high-temperature and high-pressure fluid.

[0093] As an embodiment, as shown in Figure 6 the recess is a notch 44 formed on any one edge of the second portion 42 in the width direction of the electrical connector 40. The notch 44 has a smaller impact on the flow capacity of the electrical connector 40, which is the ability of the electrical connector 40 to transmit current, on the premise that the adhesive body 60 is kept in the predetermined position during the molding process. The reason is that the flow capacity of the electrical connector 40 is positively correlated with the minimum cross-sectional area of the electrical connector 40, and the notch 44 in the width direction has a smaller impact on the cross-sectional area. However, the present disclosure does not limit the recess to be the notch 44 in the width direction. In a variant, as shown in Figures 10 to 12 the recess is a groove 45 formed in the thickness direction of the electrical connector 40, and the adhesive body 60 is arranged in the groove 45.

[0094] Further, as shown in Figure 8 the leading end 64 and the trailing end 65 of the adhesive body 60 are arranged in a notch 44. This configuration helps to improve the sealing performance. If the leading end 64 and / or the trailing end 65 of the adhesive body 60 is arranged on one side of the second portion 42 in the thickness direction, a bulge will be formed on this side, which can cause a small gap between the adhesive body 60 and the inner surface 46 of the passage, increasing the risk of leakage. For the notch 44, the housing 11 will extend into it, so that even if the leading end 64 and / or the trailing end 65 of the adhesive body 60 is placed in it, it is not easy to form a small gap. Therefore, arranging the leading end 64 and the trailing end 65 in the notch 44 is more helpful to the sealing effect. In some variants, the leading end 64 and the trailing end 65 can be arranged in different notches 44, respectively, to avoid the two ends overlapping to form a larger bulge, further improving the sealing effect.

[0095] As shown in Figure 7As shown, the depth of the notch 44 is greater than the thickness of the portion of the adhesive body 60 located in the notch 44. That is, the adhesive body 60 does not fill the notch 44. In other words, when the adhesive body 60 is embedded in the notch 44, the adhesive body 60 does not fill the notch 44. During the molding process, the shell 11 can be injected into the notch 44, thereby increasing the contact area between the shell 11 and the electrical connecting body, and also forming a clamping connection to enhance the connection strength between the electrical connecting body and the shell 11. That is, according to this configuration, the contact area between the shell 11 and the electrical connecting body 40 is increased, and also a clamping connection is formed to enhance the connection strength between the electrical connecting body 40 and the shell 11.

[0096] As shown in FIGS. 1 and 2, the second portion 42 can have a length direction. As shown in FIGS. 1 and 2, the length direction of the second portion 42 can be perpendicular to the direction in which the shell 11 extends. Figure 4 As shown in FIGS. 1 and 2, the length direction of the second portion 42 can be perpendicular to the direction in which the shell 11 extends. Figure 5 As shown in FIGS. 1 and 2, the length direction of the second portion 42 can be perpendicular to the direction in which the shell 11 extends. As shown in FIGS. 1 and 2, the length direction of the second portion 42 can be perpendicular to the direction in which the shell 11 extends.

[0097] As shown in FIGS. 1 and 2, the length direction of the second portion 42 can be perpendicular to the direction in which the shell 11 extends. Figure 5As shown, the second part 42 includes a first segment 421, a second segment 422, and a third segment 423 arranged sequentially along its length. The second segment 422 is covered by the adhesive body 60, while the first segment 421 and the third segment 423 are directly covered by the housing 11. With this configuration, the joint between the housing 11 and the electrical connector 40 will have superior sealing performance. Furthermore, with this configuration, the joint can maintain this superior sealing performance even after a long period of use. This is because the second segment 422, covered by the adhesive body 60, is located between the first segment 421 and the third segment 423, and therefore is neither located in the internal space nor in the external space. The cooperation between the first segment 421 and the housing 11 can prevent or reduce contaminants such as dust from reaching the adhesive body 60 from the internal space, while the cooperation between the third segment 423 and the housing 11 can prevent or reduce contaminants such as dust from reaching the adhesive body 60 from the external space. In this way, dust and other contaminants will have difficulty or less direct contact with the adhesive 60, preventing the adhesive 60 from losing its adhesiveness due to contamination by dust and other contaminants. Loss of adhesiveness in the adhesive 60 will deteriorate the sealing performance at the junction of the housing 11 and the electrical connector 60, especially after prolonged use. Although the tiny channels between the housing 11 and the second part 42 on both sides of the adhesive 60 cannot prevent the inflow of liquid, they can prevent dust. With this arrangement, the housing 11 covering the first section 421 and the third section 423 can act as a dust barrier, while the adhesive 60 covering the second section 422 can act as a liquid barrier.

[0098] like Figure 5 As shown, the dimension of the second part 42 in the length direction is D, which should preferably satisfy D≥3mm, that is, D should not be less than 3mm. A sufficiently large D, that is, greater than or equal to 3mm, can ensure good dustproof and waterproof effects and bonding strength.

[0099] The first segment 421 has a length dimension of D1, the second segment 422 has a length dimension of D2, and the third segment 423 has a length dimension of D3. The ratios D1 / D, D2 / D, and D3 / D should all be within an appropriate range. If D2 / D is too low, the waterproofing effect will be poor; if D1 / D and D3 / D are too low, the dustproofing effect will be poor, and the connection strength will also decrease. Specifically, 0.1 ≤ D1 / D ≤ 0.4, 0.3 ≤ D2 / D ≤ 0.7, and 0.1 ≤ D3 / D ≤ 0.4. Preferably, D1 / D = 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, or 0.4; D2 / D = 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, or 0.7; and D3 / D = 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, or 0.4. These parameter settings ensure good waterproofing, dustproofing, and connection strength. For example, D1 / D = 0.23, D2 / D = 0.54, and D3 / D = 0.23.

[0100] like Figure 5 As shown, the second part 42 is a flat sheet, allowing the housing 11 to have a smaller dimension in the thickness direction to enclose the second part 42, thereby reducing cost and weight. Due to the presence of the adhesive 60, the seal at the joint is guaranteed, eliminating the need for the enclosed part to have a curved or folded shape. The flat sheet-like second part 42 achieves better sealing performance at the joint with the housing 11. Compared to curved or folded shapes, the flat sheet-like second part 42 occupies less space, and the space occupied by the housing 11 enclosing it is also smaller, making it more suitable for space-constrained scenarios.

[0101] Furthermore, the thickness dimension of the housing 11 should not be too large or too small, and can be limited to a certain range. If the thickness dimension of the housing 11 is too large, it will increase cost and weight, and shrinkage will be more pronounced because the outer part of the housing 11 cools first, followed by the inner part, leading to severe deformation and making leakage paths more likely. If the thickness dimension of the housing 11 is too small, warping is likely to occur at the edges of the housing 11. Therefore, in some embodiments, such as... Figure 5 As shown, the shortest distance from the second part 42 to the surface of the housing 11 in the thickness direction is T, where 1 mm ≤ T ≤ 5 mm, and T is the smaller of T1 and T2. The surface of the housing 11 is the outer surface of the housing 11, i.e., the surface away from the second part 42. Preferably, T = 3 mm, which has the advantage of making it less likely to form a leakage path and less likely to cause warping of the housing 11. Alternatively, T = 2 mm or T = 4 mm.

[0102] like Figure 4 and Figure 6As shown, the electrical connector 40 is generally flat and plate-like. The first portion 41 has a first surface portion 411 and a second surface portion 412. The first surface portion 411 and the second surface portion 412 are located on opposite sides of the first portion 41 in the thickness direction of the electrical connector 40, with the first surface portion 411 being located outside the housing 11 and the second surface portion 412 being covered by the housing 11. The third portion 43 has a third surface portion 431 and a fourth surface portion 432, with the third surface portion 431 and the fourth surface portion 432 being located on opposite sides of the second portion 42 in the thickness direction, with the third surface portion 431 being located inside the housing 11 and the fourth surface portion 432 being covered by the housing 11. The first surface portion 411 and the third surface portion 431 are located on different sides of the electrical connector 40 in the thickness direction. That is, the first surface portion 411 located outside the housing 11 and the third surface portion 431 located inside the housing 11 are located on opposite sides of the electrical connector 40 in the thickness direction. This means that when a contaminant outside the housing 11 enters the inside of the housing 11, it has to cross the electrical connector 40 from the first surface portion 411 to the third surface portion 431 on the other side, and the shortest leakage path needs to go around the outer periphery of the second portion 42, increasing the length of the leakage path and reducing the risk of leakage, thereby improving the sealing effect.

[0103] The housing 10 can be made of plastic, fiber, etc. For example, the plastic can be nylon, polyethylene, polypropylene, etc. The nylon can be nylon 6. The fiber can be rayon, synthetic fiber, glass fiber, etc. Further, the housing 10 can be plastic + fiber, for example, nylon 6 + glass fiber.

[0104] The electrical connector 40 is made of a conductor, which can be a metal or an alloy. For example, copper and its alloys, aluminum and its alloys, nickel and its alloys. If the overcurrent capacity is extremely high, the conductor can be silver. The electrical connector 40 can have two, one as the positive electrode of the power storage device 100 and one as the negative electrode of the power storage device 100.

[0105] <Example power consuming device>

[0106] As shown, Figure 13 The power consuming device 200 includes the power storage device 100. The power consuming device can be a vehicle, a household appliance, an industrial device, etc. The vehicle can be a car, a truck, an excavator, etc. The power storage device 100 can be used as a power battery or a start-stop battery in a vehicle. The start-stop battery is a type of storage battery designed specifically for car start-stop systems, which can shut down the engine when the car is idling and quickly start the engine when needed, thereby effectively reducing fuel consumption and emissions of the car in the idling state.

[0107] It should be noted that various elements as described in the foregoing detailed description of the specific embodiments can be combined in any suitable manner in the technology. To avoid unnecessary repetition, the technology does not address each and every possible combination.

[0108] It should be understood that multiple components and / or parts shown in the preceding figures can be provided more separately or in additional combinations than shown in the drawings. The disclosure reciting "a" or "one" to describe a component or part is not to be construed to exclude the other components or parts.

[0109] It should be understood that although the terms "first" or "second" or the like can be used herein to describe various elements (such as the first part and the second part), these elements are not to be construed as being limited by these terms. These terms are only used to distinguish one element from another.

[0110] The above describes the basic principles of the technology in conjunction with specific embodiments. It should be noted that the advantages, benefits, effects and the like mentioned in the technology are only examples and are not intended to limit the technology. It should not be considered that these advantages, benefits, effects and the like are necessarily required for each embodiment of the technology. In addition, the specific details of the foregoing disclosure are only for the purpose of example and understanding, and are not intended to limit the technology to the specific details described above.

[0111] The above is only a specific embodiment of the technology, but the protection scope of the technology is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the technology, which should be covered by the protection scope of the technology. Therefore, the protection scope of the technology should be subject to the protection scope of the claims.

Claims

1. A housing assembly, characterized by, The housing and the electrical connector are fixedly connected; The electrical connector comprises a first portion, a second portion and a third portion arranged in sequence along a length direction of the electrical connector, the first portion is at least partially located in an external space of the housing, and the third portion is at least partially located in an internal space of the housing; A wall of the housing is provided with a channel extending from the internal space to the external space, the second portion is embedded in the channel, an inner surface of the channel covers an outer surface of the second portion, and an adhesive body is arranged between the outer surface of the second portion and the inner surface of the channel and adheres to the outer surface of the second portion and the inner surface of the channel.

2. The housing assembly of claim 1, wherein, The adhesive body extends along a width direction of the electrical connector on the outer surface of the second portion.

3. The housing assembly of claim 2, wherein, The adhesive body is continuously wound on the outer surface of the second portion, and the number of winding turns of the adhesive body is N, 2≤N≤10.

4. The housing assembly of claim 1, wherein, The adhesive body comprises a substrate and an adhesive attached to the substrate, the substrate is configured as a substrate layer, the adhesive is configured as a first adhesive layer and a second adhesive layer, and the first adhesive layer, the substrate layer and the second adhesive layer are stacked in sequence in a thickness direction of the adhesive body.

5. The housing assembly of claim 4, wherein, The adhesive is an acrylic adhesive layer, and the substrate is a non-woven fabric.

6. The housing assembly of any one of claims 1 to 5, wherein, The second portion is provided with a recess, and at least part of the adhesive body is embedded in the recess. The recess is a notch formed on any one edge of the second portion in the width direction of the electrical connector.

7. The housing assembly of claim 6, wherein, The depth of the notch is greater than the thickness of the part of the adhesive body located in the notch.

8. The housing assembly of any one of claims 1 to 5, wherein, The size of the second portion in the length direction is greater than the size of the adhesive body in the length direction; and / or The second portion comprises a first segment, a second segment and a third segment arranged in sequence in the length direction, the second segment is covered by the adhesive body, and the first segment and the third segment are covered by the housing.

9. The housing assembly according to claim 8, wherein: The size of the second portion in the length direction is D, and D≥2mm; and / or The size of the first segment in the length direction is D1, and 0.1≤D1 / D≤0.4; and / or The size of the second segment in the length direction is D2, and 0.3≤D2 / D≤0.7; and / or The size of the third segment in the length direction is D3, and 0.1≤D3 / D≤0.

4.

10. The housing assembly of claim 8, wherein, In the thickness direction of the electrical connector, the shortest distance from the second portion to the surface of the housing is T, and 1mm≤T≤10mm.

11. The housing assembly of any one of claims 1 to 5, wherein, The electrical connector is in a flat plate shape; and / or The first portion has a first surface part and a second surface part, the first surface part and the second surface part are located at opposite sides of the first portion in a thickness direction of the electrical connector respectively, the first surface part is located at an external space of the shell, and the second surface part is covered by the shell; the third portion has a third surface part and a fourth surface part, the third surface part and the fourth surface part are located at opposite sides of the second portion in the thickness direction respectively, the third surface part is located at an internal space of the shell, and the fourth surface part is covered by the shell, wherein the first surface part and the third surface part are located at different sides of the electrical connector in the thickness direction.

12. An electrical energy storage device, characterized by The shell assembly according to any one of claims 1 to 11.

13. An electrical device, characterized by The power storage device according to claim 12.

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