Electricity storage device and electric equipment

Abstract

The utility model provides an electricity storage device and electric equipment. The power storage device comprises a shell, a power supply device, a power supply device, a power supply device, a power supply device, a power supply device and a power supply device, the circuit board is mounted in the accommodating cavity; one end of the electric connector is electrically connected with the circuit board, and the other end of the electric connector partially extends to the outer side of the shell through the through hole; the annular sealing element is located on the outer surface of the shell, and the annular sealing element covers at least part of a gap between the electric connector and the inner surface of the through hole; and the sealant is filled between the annular sealing element and the shell and / or between the annular sealing element and the electric connector. Due to the blocking effect of the annular sealing piece, the uncured sealant cannot or less flow into the gap, so that the sealant cannot or less form cavities and through holes after being cured, and the sealing effect of the sealant is ensured; the annular sealing piece covers the gap and can also prevent external substances from entering the electricity storage device through the gap, so that the annular sealing piece and the sealant form a double-sealing structure, and the sealing effect is enhanced.

Description

Technical Field

[0001] This disclosure relates to the field of energy storage technology, specifically to an energy storage device and an electrical appliance. Background Technology

[0002] With the development of energy storage technology, the structure and function of energy storage devices are becoming increasingly complex. In order to achieve electrical connection with external devices, electrical connectors are installed in energy storage devices.

[0003] One end of the electrical connector connects to the internal components of the energy storage device, while the other end extends through the housing of the energy storage device to the outside of the device for connection to external equipment.

[0004] To seal the gap between the electrical connector and the housing at the penetration point, sealant is usually applied to the gap, but this method is not very effective. Utility Model Content

[0005] In view of this, the present disclosure provides an energy storage device, including a housing, a circuit board, an electrical connector, an annular seal, and a sealant. The housing has an internal accommodating cavity, and the surface of the housing has a through hole communicating with the accommodating cavity. The circuit board is mounted within the accommodating cavity. One end of the electrical connector is connected to the circuit board, and the other end extends partially to the outside of the housing through the through hole. The annular seal is located on the outer surface of the housing, covering at least a portion of the gap between the electrical connector and the inner surface of the through hole. The sealant is located on the outer surface of the housing, and the annular seal covers at least a portion of the gap between the electrical connector and the inner surface of the through hole.

[0006] Alternatively or supplementarily, the housing is provided with a first positioning surface, and the outer side wall of the electrical connector is provided with a protruding guide portion. The end face of the guide portion facing the housing is a second positioning surface. The first positioning surface and the second positioning surface are spaced apart in the length direction of the electrical connector. An annular seal is located between the first positioning surface and the second positioning surface in the length direction of the electrical connector. The distance between the first positioning surface and the second positioning surface in the length direction of the electrical connector is D1. The dimension of the annular seal in the length direction of the electrical connector is D2, 0.9≥D2 / D1≥0.3, and / or 2mm≥D1-D2≥0.2mm.

[0007] Alternatively or supplementally, the guide portion is a strip-shaped protrusion extending along the length of the electrical connector.

[0008] Alternatively or supplementally, multiple strip-shaped protrusions are arranged at intervals along the outer periphery of the electrical connector.

[0009] Alternatively, the housing surface is provided with a clearance hole that connects to the through hole. In the orthographic projection on the first positioning surface, the guide portion is located in the clearance hole, and the annular seal partially overlaps with the guide portion and the clearance hole, respectively.

[0010] Alternatively, the housing may have a baffle wall surrounding the through hole, and a glue-receiving groove is formed within the baffle wall, with at least an annular seal embedded in the glue-receiving groove.

[0011] Alternatively, the distance D3 between the sealant wall and the outer periphery of the annular seal is 3mm ≥ D3 ≥ 0.3mm.

[0012] Alternatively or supplementally, the top surface of the sealant wall is higher than the top surface of the annular seal.

[0013] Alternatively, along the length of the electrical connector, the shortest distance between the top surface of the retaining wall and the top surface of the annular seal is D4, where 2mm ≥ D4 ≥ 0.2mm.

[0014] Alternatively or supplementally, the outer peripheral surface of the electrical connector has a protruding surface, in which the sealant partially overlaps with the protruding surface in the orthographic projection on the first positioning surface.

[0015] Alternatively or supplementally, the circuit may also include a tab holder located on the side of the circuit board opposite to the electrical connector. The tab holder includes a support portion, the circuit board has a connection portion for connection with the electrical connector, and the support portion is disposed around the outer periphery of the connection portion and abuts against the circuit board.

[0016] Alternatively or supplementally, the support includes a plurality of spaced-apart support bosses.

[0017] This disclosure also provides an electrical appliance, including the energy storage device described above.

[0018] The energy storage device disclosed herein covers the gap between the electrical connector and the inner surface of the through hole with an annular seal before applying sealant to the annular seal. Due to the blocking effect of the annular seal, uncured sealant will not flow into the gap between the electrical connector and the inner surface of the through hole, resulting in less or no voids and through holes formed after the sealant cures, thus ensuring the sealing effect of the sealant. Secondly, the annular seal covering the gap between the electrical connector and the inner surface of the through hole also prevents external substances from entering the energy storage device through the gap, thus forming a double sealing structure together with the sealant, enhancing the sealing effect. Thirdly, since the sealant is applied to the annular seal, the annular seal can prevent the sealant from deforming due to curing shrinkage, preventing gaps from forming between the sealant and the electrical connector after curing. Attached Figure Description

[0019] It should be understood that the following figures only illustrate certain embodiments of this disclosure and should not be construed as limiting the scope.

[0020] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0021] It should be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0022] Figure 1 This is a schematic diagram of the structure of an energy storage device according to an embodiment of the present disclosure.

[0023] Figure 2 for Figure 1 A schematic diagram of the assembly structure of the energy storage device.

[0024] Figure 3 for Figure 1 A partial structural diagram of the energy storage device.

[0025] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure at point AA.

[0026] Figure 5 for Figure 4 A schematic diagram of the local structure at point B.

[0027] Figure 6 This diagram illustrates the structure of the electrical connector and part of the housing.

[0028] Figure 7 For including Figure 1 A schematic diagram of the electrical equipment of the energy storage device.

[0029] Explanation of reference numerals in the attached drawings: 10, energy storage device; 101, upper housing; 102, lower housing; 110, through hole; 111, clearance hole; 112, clearance hole; 120, first positioning surface; 130, adhesive retaining wall; 200, circuit board; 210, connecting part; 300, electrical connector; 310, second positioning surface; 320, protrusion; 321, protrusion; 330, first mating surface; 340, second mating surface; 350, transverse end face; 400, annular seal; 500, sealant; 600, electrode bracket; 610, support part; 611, support boss; 700, battery cell; 701, electrode; 1000, electrical equipment; R, length direction of the electrical connector. Detailed Implementation

[0030] Some energy storage devices include electrical connectors that penetrate the housing, and there is often a gap between the connector and the housing at the penetration point. However, simply applying sealant to the gap to seal it does not achieve a satisfactory seal.

[0031] The inventors discovered that the cause of this technical problem is that when uncured sealant is applied to the gap between the electrical connector and the housing, it flows into the gap, resulting in uneven surfaces and internal voids after curing, and potentially even through-holes. If voids exist within the cured sealant, its strength is significantly reduced, making it susceptible to damage under external forces and thus losing its sealing effect. If through-holes form within the cured sealant, these holes connect the inside and outside of the energy storage device. Dust, liquids, and other contaminants can enter the device from the outside through these holes, contaminating the BMS circuit board and energy storage modules, thereby damaging the device.

[0032] To prevent uncured sealant from flowing into the gap between the electrical connector and the housing when applied, the inventors made numerous attempts and ultimately proposed the following innovative solution: An annular seal covers the gap between the electrical connector and the housing, with the sealant covering the annular seal. When uncured sealant is applied to the annular seal, the sealant's blocking effect prevents or minimizes its flow into the gap between the electrical connector and the inner surface of the through-hole, thus preventing or minimizing the formation of voids and through-holes after curing, thereby ensuring the sealant's sealing effect. Secondly, the annular seal covering the gap between the electrical connector and the inner surface of the through-hole also prevents external substances from entering the energy storage device through the gap, forming a double-sealing structure with the sealant and enhancing the sealing effect. Thirdly, because the sealant is applied to the annular seal, the annular seal prevents deformation caused by curing shrinkage, preventing gaps from forming between the sealant and the electrical connector after curing.

[0033] Numerous specific details are set forth below to provide an understanding of the structure, function, and use of the embodiments described and illustrated in the specification and figures. It is to be understood that the embodiments described and illustrated herein are non-limiting examples, and thus it will be appreciated that the particular structural and functional details disclosed herein are representative and exemplary. Variations and changes may be made to these embodiments without departing from the scope of the claims.

[0034] This disclosure provides an energy storage device. For ease of understanding, the overall structure of the energy storage device according to this disclosure will be described below by way of example. It should be understood that the structure of the energy storage device is not limited to the following description. For example, one or more elements introduced below may be omitted or replaced, and their layout relationships may be changed.

[0035] refer to Figure 1 and Figure 2 The energy storage device 10 may include a housing, a battery module, and a BMS protection board.

[0036] The energy storage device 10 can be a start-stop battery pack, a low-voltage battery pack, a power battery pack, or an energy storage module, etc.

[0037] The housing may include multiple housings. These housings can be assembled together to form a cavity. The battery module and BMS protection board, among other components, can be housed within this cavity and supported and protected by the housing. For example, the multiple housings may include housing 101 and housing 102. Housing 101 may be referred to as upper housing 101, and housing 102 may be referred to as lower housing 102.

[0038] It is understood that "up" and "down" here do not necessarily mean that, in the usage scenario, housing 101 is higher than housing 102 in the direction of gravity. It is also understood that, in other examples, the outer shell may consist of three or more housings assembled together, or the outer shell may consist of only a single, integrally formed housing.

[0039] A battery module is a key component of an energy storage device. It is an energy storage unit with a certain voltage and capacity, providing electrical energy to appliances and other devices. A battery module can include one or more battery cells, also known as individual battery cells, which are the basic energy storage units of the battery module. A battery cell includes a positive electrode, a negative electrode, an electrolyte, and a separator, and is able to store and release electrical energy in a chemical reaction. When a battery module includes multiple battery cells, these cells can be combined together in series and parallel to form a battery module. Figure 2 The shown cell 700 is a pouch cell, which will only bulge and crack without exploding in the event of a safety hazard, thus possessing excellent explosion-proof performance. Besides pouch cells, cell 700 can also be a cylindrical cell, an aluminum-cased cell, or a steel-cased cell. Cell 700 can be a repeatedly charged and discharged cell, and the energy storage device including this cell 700 is a secondary battery, such as a lithium-ion battery, potassium-ion battery, semi-solid-state battery, solid-state battery, prismatic battery, lead-acid battery, nickel-metal hydride battery, and nickel-cadmium battery.

[0040] Regardless of the type of battery cell, tabs 701 are required to connect the internal and external circuits of the cell, as well as to facilitate current input and output. To secure and protect the tabs 701, the battery module may also include a tab bracket 600. The tab bracket 600 can be positioned near the tabs 701 of the battery cell 700 to limit, guide, and support the tabs 701. With the tabs 701 supported by the tab bracket 600, a total positive and negative terminal can be formed on the tab bracket 600 for connection to the circuit. However, the tab bracket 600 is not mandatory; the tabs 701 can also be welded together in a lap-over manner to directly form the total positive and negative terminals.

[0041] The BMS protection board, or Battery Management System protection board, is a key component for ensuring the safe operation of energy storage devices, improving their performance, and extending their lifespan. The BMS protection board can monitor critical parameters of the energy storage device in real time, including voltage and temperature. Voltage can be obtained through a voltage sensor, which can be mounted on the tab holder 600. Temperature can be obtained through a thermistor, which can be mounted on the tab 701. The voltage sensor and thermistor transmit the monitored voltage and temperature parameters to the BMS protection board via a low-voltage circuit. Based on the monitored critical parameters, the BMS protection board can perform various functions, such as providing overvoltage and undervoltage protection to effectively prevent the energy storage device from exceeding the safe voltage range during charging or discharging. Furthermore, the BMS protection board can also support overcurrent protection to prevent the energy storage device from generating current exceeding the rated value, and continuously monitor the temperature of the energy storage device to prevent overheating. The BMS protection board includes a circuit board 200 and various electronic components mounted on the circuit board 200. When the tab bracket 600 is provided, the BMS protection board can be located on the side of the tab bracket 600 facing away from the cell 700. When the tab bracket 600 is not provided, the BMS protection board can be located on the side closer to the tab 701 of the cell 700, so as to reduce the circuit length for transmitting monitoring signals.

[0042] In addition to monitoring parameters such as voltage and temperature inside the energy storage device, the BMS protection board can also transmit data with external devices. An electrical connector 300 can be provided, with one end connected to the BMS protection board and the other end extending through the housing of the energy storage device to the outside for connection with external devices. The electrical connector 300 can be a low-voltage connector, connecting to a low-voltage circuit used for transmitting sensing and control signals. The electrical connector 300 can also be a high-voltage connector, connecting to the charging and discharging circuit of the energy storage device. The electrical connector 300 can also be an integrated low-voltage and high-voltage connector, connecting to both low-voltage and high-voltage circuits simultaneously to achieve both signal transmission and charging / discharging functions. The electrical connector 300 can include a base, a peripheral wall surrounding the base, and contacts on the peripheral wall. The base secures the contacts, and the peripheral wall protects them. When the electrical connector 300 is connected to an external electrical connector, the contacts of the electrical connector 300 connect with the contacts of the external electrical connector, forming a circuit between the energy storage device and the external device.

[0043] In order for the electrical connector 300 to pass through the housing of the energy storage device, it can be... Figure 2A through hole 110 is provided on the housing 101 shown. When assembling the energy storage device, the electrical connector 300 and the through hole 110 can be aligned first, and then the electrical connector 300 can be moved along the installation direction until the electrical connector 300 passes through the housing 101. After the electrical connector 300 is installed in place, the gap between the electrical connector 300 and the inner surface of the through hole 110 can be sealed using an annular seal and sealant.

[0044] This disclosure provides an energy storage device 10. For example... Figure 1 and Figure 2 As shown, the energy storage device 10 includes a housing 101, a circuit board 200, an electrical connector 300, an annular seal 400, and sealant 500. The housing 101 has an internal cavity, and its surface has a through hole 110 communicating with the cavity. The circuit board 200 is installed within the cavity. One end of the electrical connector 300 is connected to the circuit board 200, and the other end extends partially to the outside of the housing 101 through the through hole 110.

[0045] An annular seal 400 is located on the outer surface of the housing 101. The annular seal 400 covers at least a portion of the gap between the electrical connector 300 and the inner surface of the through hole 110. Sealant 500 covers the annular seal 400, filling the space between the annular seal 400 and the housing 101 and / or between the annular seal 400 and the electrical connector 300. This means that during assembly, the annular seal 400 is first installed into the gap between the electrical connector 300 and the through hole 110. Then, sealant 500 is applied to the gap between the electrical connector 300 and the through hole 110, covering the annular seal 400 and, after curing, mating with the annular seal 400 to achieve a seal. When the uncured sealant 500 is applied to the annular seal 400, due to the blocking effect of the annular seal 400, the sealant 500 will not flow into the gap between the electrical connector 300 and the inner surface of the through hole 110, so that the sealant 500 will not form voids and through holes after curing, thus ensuring the sealing effect of the sealant 500. Secondly, the annular seal 400 covers the gap between the electrical connector 300 and the inner surface of the through hole 110, which can also prevent external substances from entering the energy storage device 10 through the gap, thus forming a double sealing structure together with the sealant 500, enhancing the sealing effect. Thirdly, since the sealant 500 is applied to the annular seal 400, the annular seal 400 can prevent the sealant 500 from deforming due to curing shrinkage, preventing the sealant 500 from forming gaps with the electrical connector 300 after curing.

[0046] The fact that the annular seal 400 covers the gap between the inner surface of the electrical connector 300 and the through hole 110 does not necessarily mean that the electrical connector 300 and the inner surface of the through hole 110 achieve a high level of sealing solely through the annular seal 400. It is sufficient that the annular seal 400 can block uncured sealant 500 and prevent it from flowing into the gap between the inner surface of the electrical connector 300 and the through hole 110.

[0047] This disclosure does not impose any particular limitation on the material of the annular seal 400, as long as it can effectively prevent uncured sealant 500 from flowing through the gap between the electrical connector 300 and the inner surface of the through hole 110. By way of example only, the annular seal 400 can, but is not limited to, be a natural or synthetic rubber ring. In a specific example, the annular seal 400 can be a silicone ring.

[0048] This disclosure does not impose any particular restrictions on the material of sealant 500, as long as it can achieve a good seal after curing. By way of example only, sealant 500 can be, but is not limited to, silicone sealant, polyurethane sealant, polysulfide sealant, butyl sealant, or acrylic sealant. In a specific example, sealant 500 can be an organosilicon potting compound.

[0049] In a preferred embodiment, the annular seal 400 may be a sealing ring to continuously cover the gap between the electrical connector 300 and the inner surface of the through hole 110. When the sealing ring is installed in place, its inner circumferential surface can fit tightly against the outer circumferential surface of the electrical connector 300, thereby preventing sealant 500 from flowing along the outer circumferential surface of the electrical connector 300 into the gap between the electrical connector 300 and the inner surface of the through hole 110. The housing 101 is provided with a first positioning surface 120, and the through hole 110 extends from the inner side of the housing 101 to the outer side of the housing 101 to the first positioning surface 120. The sealing ring abuts against the first positioning surface 120, and the orthographic projection of the outer periphery of the sealing ring on the first positioning surface 120 surrounds the outer periphery of the through hole 110, thereby preventing sealant 500 from flowing along the first positioning surface 120 from the outer periphery of the through hole 110 into the gap between the electrical connector 300 and the inner surface of the through hole 110. Therefore, the sealing ring can prevent the sealant 500 from flowing into the gap between the inner surface of the electrical connector 300 and the through hole 110 in all directions, thus ensuring a high degree of sealing effect.

[0050] During the installation of the annular seal 400, it needs to be fitted onto the electrical connector 300 and then moved into place along the insertion direction (i.e., the length direction of the electrical connector). During this process, the inner periphery of the annular seal 400 contacts the outer periphery of the electrical connector 300. If the friction between the inner periphery of the annular seal 400 and the outer periphery of the electrical connector 300 is large, it can cause the inner periphery of the annular seal 400 to lift. Once the inner periphery of the annular seal 400 lifts, the gap between the electrical connector 300 and the inner surface of the through hole 110 at the location where the sealant 500 lifts will no longer be covered by the annular seal 400, causing the sealant 500 to flow into the gap. To ensure that the inner periphery of the annular seal 400 does not lift after installation, such as... Figure 4 As shown, in some embodiments, the housing 101 is provided with a first positioning surface 120, and the outer side wall of the electrical connector 300 is provided with a guide portion (also called a protrusion) 320, the end face of the guide portion facing the housing 101 being a second positioning surface 310. The first positioning surface 120 and the second positioning surface 310 are spaced apart in the longitudinal direction R of the electrical connector 300, and the annular seal 400 is located between the first positioning surface 120 and the second positioning surface 310 in the longitudinal direction R of the electrical connector 300. The annular seal 400 is positioned by the first positioning surface 120 and the second positioning surface 310, and the sealant 500 is held between the first positioning surface 120 and the second positioning surface 310. This prevents the annular seal 400 from shifting position along the length direction R of the electrical connector 300, ensuring that the annular seal 400 always covers the gap between the electrical connector 300 and the inner surface of the through hole 110. This ensures that during the application of uncured sealant 500, the annular seal 400 always blocks the gap between the sealant 500 and the inner surface of the electrical connector 300 and the through hole 110, thus preventing the sealant 500 from flowing into the gap and causing unevenness on the cured surface, as well as the formation of voids and through holes.

[0051] like Figure 4 As shown, the distance between the first positioning surface 120 and the second positioning surface 310 along the length R of the electrical connector 300 is defined as D1, and the dimension of the annular seal 400 along the length R of the electrical connector 300 is defined as D2. The first positioning surface 120 and the second positioning surface 310 should have a suitable distance along the length R of the electrical connector 300. If D1 is too large relative to D2, it may not provide sufficient constraint on the annular seal 400, and warping will be difficult to avoid. If D1 is too small relative to D2, for example, if D1 is very close to D2, on the one hand, the annular seal 400 will be difficult to install into place, and on the other hand, the uncured sealant 500 will have difficulty flowing into the area between the annular seal 400 and the second positioning surface 310, thus making it difficult to completely cover the annular seal 400 and achieve a good sealing performance.

[0052] In view of this, such as Figure 4 As shown, the dimensional relationship between D1 and D2 can be set as follows: 0.9≥D2 / D1≥0.3, and / or 2mm≥D1-D2≥0.2mm.

[0053] When D2 / D1≥0.3 and / or 2mm≥D1-D2, D1 will not be much larger than D2. This ensures the positioning effect of the first positioning surface 120 and the second positioning surface 310 on the annular seal 400 while effectively preventing the annular seal 400 from lifting. Because D1 is greater than D2, the sealant 500 can flow into the area between the second positioning surface 310 and the annular seal 400, completely covering the annular seal 400, thus achieving a better sealing effect.

[0054] When the required diameter (D2 / D1) is ≥ 0.9 and / or D1-D2 ≥ 0.2 mm, sufficient space is left between the second positioning surface 310 and the annular seal 400 to allow the sealant to flow smoothly into this space. Thus, when the uncured sealant 500 is applied, it flows into the area between the annular seal 400 and the second positioning surface 310, completely covering the annular seal 400 to achieve a good sealing effect.

[0055] Alternatively, D2 / D1 can also be 0.4, 0.5, 0.6, 0.7, or 0.8, etc.

[0056] Alternatively, D1-D2 can also be 0.4mm, 0.6mm, 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm or 1.8mm, etc.

[0057] The first positioning surface 120 can be formed on the outer side of the housing 101, as part of the outer surface of the housing 101. The second positioning surface 310 can be implemented in various ways. As one exemplary implementation, such as... Figure 4 As shown, the outer peripheral surface of the electrical connector 300 is provided with a guide portion 320, and the second positioning surface 310 is the end face of the guide portion 320 facing the annular seal 400. This design offers the advantage of simple structure and ease of implementation. It is understood that in other examples, the second positioning surface 310 can also be implemented in other ways. For example, the electrical connector 300 can sequentially include a first part and a second part along its length direction R. The radial dimension of the second part can be larger than that of the first part, thereby forming an end face facing the first positioning surface 120 at the junction of the two parts, which can constitute the second positioning surface 310.

[0058] Typically, the electrical connector 300 and the external electrical connector need to be aligned during connection to ensure electrical connection. In some embodiments, the guide portion 320 is configured to be received by the recess of the external electrical connector (not shown) to align the electrical connector 300 with the external electrical connector. Thus, when connecting the electrical connector 300 to the external electrical connector, it is only necessary to align the guide portion 320 of the electrical connector 300 and the recess of the external electrical connector to ensure electrical connection between them. Because the guide portion 320 is provided on the electrical connector 300 and the recess that can receive the guide portion 320 is provided on the external electrical connector, the electrical connector 300 of the energy storage device 10 and the external electrical connector form a mutually mating structure, which can prevent the electrical connector 300 from disconnecting from the external electrical connector due to external forces such as vibration or impact, thereby improving the stability of the connection between the electrical connector 300 and the external electrical connector. This is especially important for electrical connectors 300 that require frequent plugging and unplugging or operate in harsh environments. Furthermore, when inserting the external electrical connector into the electrical connector 300, its insertion direction and posture need to be adjusted so that the guide portion 320 and the recess can mate, thereby providing guidance and preventing reverse insertion. The guide portion 320 can be used to set the second positioning surface 310 for positioning the annular seal 400, and also to form a mating connection with the external electrical connector. This eliminates the need for separate guide portions on the electrical connector 300 to achieve both positioning and connection functions, saving material and reducing the size of the electrical connector 300.

[0059] like Figure 6 As shown, in some embodiments, the guide portion 320 is a strip-shaped protrusion extending along the length direction R of the electrical connector 300. After the strip-shaped protrusion is provided on the electrical connector 300, the recess of the external electrical connector can be inserted into and pulled out of the electrical connector 300 along the strip-shaped protrusion, which can also play an alignment and guiding role, and at the same time make the connection between the electrical connector 300 and the external electrical connector more stable.

[0060] like Figure 6 As shown, multiple strip-shaped protrusions are arranged at intervals along the outer periphery of the electrical connector 300. On the one hand, the multiple strip-shaped protrusions can position the annular seal 400 at multiple locations along the outer periphery of the electrical connector 300, effectively preventing the annular seal 400 from warping. On the other hand, the connection between the electrical connector 300 and an external electrical connector via the multiple strip-shaped protrusions can improve the stability of the connection.

[0061] As mentioned earlier, the through hole 110 is provided in the housing 101 to allow the electrical connector 300 to pass through the housing 101 during assembly. Similarly, after the guide portion 320 is provided on the electrical connector 300, space needs to be provided in the housing 101 to allow the guide portion 320 to pass through. The surface of the housing 101 is provided with a clearance hole connecting to the through hole. In the orthographic projection on the first positioning surface 120, the guide portion 320 is located in the clearance hole 111, and the annular seal 400 partially overlaps with both the guide portion 320 and the clearance hole 111. Figure 6 As shown, in some embodiments, the through hole 110 is provided with a clearance hole 111 for the guide portion 320 to pass through. The orthographic projection of the annular seal 400 on the first positioning surface 120 covers the entire clearance hole 111. After the annular seal 400 completely covers the clearance hole 111, when uncured sealant 500 is applied, the sealant 500 will not flow into the clearance hole 111, thereby ensuring a better sealing effect.

[0062] In addition to the guide portion 320, other protrusions, such as protrusion 321, can be provided on the electrical connector 300. The function of protrusion 321 can be different from that of guide portion 320 to achieve different functions. For example, guide portion 320 can be a longer strip-shaped protrusion to provide guidance, while protrusion 321 can be a shorter protrusion to increase connection stability. The shapes of protrusion 321 and guide portion 320 can also be different to adjust the insertion posture of the external electrical connector according to the shape of protrusion 321, thereby preventing reverse insertion. Accordingly, through hole 110 is provided with clearance hole 112 for protrusion 321 to pass through. The orthographic projection of annular seal 400 on first positioning surface 120 covers the entire clearance hole 112. Furthermore, more protrusions can be provided according to actual needs, and this disclosure does not limit the number and type of guide portion 320 and protrusion 321.

[0063] In some embodiments, the housing 101 is provided with a baffle wall surrounding the through hole, and a glue-receiving groove is formed within the baffle wall, with at least an annular seal embedded in the glue-receiving groove. For example... Figures 3 to 6As shown, the housing 101 has a retaining wall 130 that extends continuously around the annular seal 400. First, when uncured sealant 500 is applied, the sealant 500 can accumulate in the receiving groove within the retaining wall 130, thus helping to build up the sealant 500 so that a smaller amount of sealant 500 can adequately cover the annular seal 400. Second, the sealant 500 forms a sealing fit with the inner circumferential surface of the retaining wall 130, which helps to increase the length of potential leakage paths, causing the leakage paths to bend and fold back, thereby further improving the sealing effect. Third, since the flow area of ​​the sealant 500 is confined within the retaining wall 130, it prevents the sealant 500 from flowing to other areas outside the retaining wall 130 and contaminating other parts or components, and avoids negative impacts on the shape.

[0064] In some embodiments, such as Figure 4 and Figure 5 As shown, the sealant-blocking wall 130 is spaced apart from the outer periphery of the annular seal 400. When uncured sealant 500 is applied, the sealant 500 can flow into the space between the sealant-blocking wall 130 and the outer periphery of the annular seal 400, filling the gap between them and covering the outer periphery of the annular seal 400, thereby achieving a better sealing effect.

[0065] The distance between the sealant-blocking wall 130 and the outer periphery of the annular seal 400 should not be too large or too small. If the distance between the sealant-blocking wall 130 and the outer periphery of the annular seal 400 is too small, the uncured sealant 500 will have difficulty flowing into the space between them. If the distance between the sealant-blocking wall 130 and the outer periphery of the annular seal 400 is too large, too much sealant 500 will be needed to fill the space between them. This will increase the risk of shrinkage due to the inconsistent curing speed of the sealant 500 inside and outside during the curing process. The shrinkage of the sealant 500 will increase the risk of micro-gaps forming at the joint between it and the sealant-blocking wall 130 or the seal 400, thus leading to leakage. When the minimum distance D3 between the sealant wall 130 and the outer periphery of the annular seal 400 satisfies 3mm≥D3≥0.3mm, the sealant wall 130 and the outer periphery of the annular seal 400 will have an appropriate gap, thereby ensuring that the uncured sealant 500 can flow between them and avoid the formation of tiny gaps at the joint between the sealant 500 and the sealant wall 130 or the seal 400.

[0066] Alternatively, the value of D3 can also be: 0.6mm, 0.9mm, 1.2mm, 1.5mm, 1.8mm, 2.1mm, 2.4mm, 2.7mm or 3.0mm, etc.

[0067] When uncured sealant 500 is applied, it accumulates, forming a structure that is high in the center and low at the periphery. This means the maximum accumulation height is formed at the outer periphery of the electrical connector, and the minimum accumulation height is formed at the sealant-blocking wall 130. The annular seal 400 is located between the outer periphery of the electrical connector and the sealant-blocking wall 130. If the sealant-blocking wall 130 is too low relative to the annular seal 400, the thickness of the sealant 500 covering the annular seal 400 will be too low before curing. During curing, tension may cause the top of the annular seal 400 to become exposed. If the sealant-blocking wall 130 is too high relative to the annular seal 400, excessive sealant 500 will cover the annular seal 400. This increases the risk of shrinkage due to inconsistent curing speeds between the inside and outside of the sealant 500. This shrinkage increases the risk of micro-gaps forming at the junction of the sealant 500 with the sealant-blocking wall 130 or the seal 400, potentially leading to leakage. When the top surface of the sealant wall 130 is higher than the top surface of the annular seal 400 (that is, in the length direction of the electrical connector 300, the top surface of the sealant wall 130 is farther from the first positioning surface 120 than the top surface of the annular seal 400), and the shortest distance D4 between the two in the length direction of the electrical connector 300 satisfies 2mm≥D4≥0.2mm, the sealant wall 130 has an appropriate height relative to the annular seal 400. This can ensure that the annular seal 400 is covered with a sufficient thickness of sealant 500, so as to avoid the sealant 500 being damaged due to insufficient strength when subjected to external force, thereby exposing the annular seal 400. It can also prevent the formation of small gaps at the joint between the sealant 500 and the sealant wall 130 or the seal 400.

[0068] Alternatively, the value of D4 can also be: 0.4mm, 0.6mm, 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm or 1.8mm, etc.

[0069] In some embodiments, the outer peripheral surface of the electrical connector 300 has a protruding surface, and in the orthographic projection on the first positioning surface, the sealant 500 partially overlaps with the protruding surface. When the electrical connector 300 has a protrusion 320, although it is advantageous to connect with an external electrical connector, the outer peripheral surface of the electrical connector 300 will become an irregular shape, which is not conducive to mating with the annular seal 400. Therefore, as Figure 6As shown, the outer peripheral surface of the electrical connector 300 may include a first mating surface 330 and a second mating surface 340. The first mating surface 330 is configured to mate with an external electrical connector. The second mating surface 340 fits tightly against the inner peripheral surface of the annular seal 400. In this way, regardless of the irregularity of the shape of the first mating surface 330, it will not affect the annular seal 400. The second mating surface 340 may, for example, be configured with a more regular shape to facilitate a tight fit with the inner peripheral surface of the annular seal 400.

[0070] Furthermore, the second mating surface 340 at least partially protrudes beyond the first mating surface 330 to form a transverse end face 350 between the two, and the sealant 500 covers the transverse end face 350. After the sealant 500 covers the transverse end face 350, there will be a larger contact area between the sealant 500 and the electrical connector 300, thereby connecting more tightly with the electrical connector 300 and enhancing the sealing effect.

[0071] When an external electrical connector is plugged into or unplugged from electrical connector 300, the external force on connector 300 is transmitted to circuit board 200 through connection part 210. Under the action of external force, bending stress will be generated inside circuit board 200. If the bending stress is large, it is very likely to cause circuit board 200 to break. Therefore, such as Figure 2 and Figure 4 As shown, the energy storage device 10 also includes a tab support 600, which is located on the side of the circuit board 200 facing away from the electrical connector 300. The tab support 600 includes a support portion 610. The circuit board 200 has a connection portion 210 that connects to the electrical connector 300. The support portion 610 abuts against the outer periphery of the circuit board 200 around the connection portion 210. By providing the support portion 610 on the tab support 600 to abut against the outer periphery of the connection portion 210 to support the circuit board 200, the bending stress generated by the circuit board 200 under external force can be reduced, and excessive bending stress can be avoided, which could cause the circuit board 200 to break.

[0072] The support portion 610 can be disposed around the outer periphery of the connecting portion 210 and abut against the circuit board 200, or it can be disposed at intervals around the outer periphery of the connecting portion 210. The support portion 610 includes a plurality of spaced-apart support bosses 611. For example, when other components are disposed on the circuit board 200 and it is inconvenient to continuously surround the support portion 610, or when the support portion 610 cannot be continuously disposed due to the limitations of the tab bracket 600 itself, a plurality of support bosses 611 can be disposed at intervals around the outer periphery of the connecting portion 210. This is just an example. Figure 4As shown, the support portion 610 may include a plurality of support bosses 611 arranged circumferentially along the outer periphery. The plurality of support bosses 611 can be distributed according to the structure of the tab bracket 600, which can adapt to the structure of the tab bracket 600 and reduce the bending stress generated by the circuit board 200 under external force, thus avoiding excessive bending stress that could cause the circuit board 200 to break.

[0073] This disclosure also provides an electrical device 1000, including the aforementioned energy storage device 10. For example... Figure 7 As shown, electrical equipment 1000 can be an energy storage device, such as an energy storage device in an energy storage power station. Electrical equipment 1000 can also be electrical appliances, such as vehicles, household appliances, and industrial equipment. Vehicles include, for example, passenger vehicles, freight vehicles, and construction machinery. In vehicles, the energy storage device can be used as a power battery and a start-stop battery. The start-stop battery is used to provide a large current for a short time to start the engine, while simultaneously providing power to the vehicle's electronic equipment when the engine is off.

[0074] It should be noted that the elements described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0075] It should be understood that multiple components and / or parts can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into multiple separate components and / or parts. The use of the public designation "a" or "an" to describe a component or part is not intended to exclude other components or parts.

[0076] It should be understood that although terms such as “first” or “second” may be used in this disclosure to describe various elements, these elements are not defined by these terms, which are only used to distinguish one element from another.

[0077] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0078] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An electrical energy storage device, characterized by, include: The housing has an internal cavity, and the surface of the housing has a through hole communicating with the cavity; The circuit board is installed inside the accommodating cavity; An electrical connector, one end of which is electrically connected to the circuit board, and the other end of which extends partially to the outside of the housing through the through hole; An annular seal is located on the outer surface of the housing, and the annular seal covers at least a portion of the gap between the electrical connector and the inner surface of the through hole; Sealant is used to fill the space between the annular seal and the housing and / or between the annular seal and the electrical connector.

2. The power storage device according to claim 1, wherein The housing has a first positioning surface, and the outer wall of the electrical connector has a protruding guide portion. The end face of the guide portion facing the housing is a second positioning surface. The first positioning surface and the second positioning surface are spaced apart along the length of the electrical connector. The annular seal is located between the first positioning surface and the second positioning surface along the length of the electrical connector. The distance between the first positioning surface and the second positioning surface along the length of the electrical connector is D1, and the dimension of the annular seal along the length of the electrical connector is D2. Among them, 0.9≥D2 / D1≥0.3; and / or 2mm≥D1-D2≥0.2mm.

3. The power storage device according to claim 2, wherein The guide portion is a strip-shaped protrusion extending along the length direction of the electrical connector, and a plurality of the strip-shaped protrusions are arranged at intervals along the outer periphery of the electrical connector.

4. The power storage device according to claim 2, wherein The surface of the housing is provided with a clearance hole that connects to the through hole. In the orthographic projection on the first positioning surface, the guide part is located in the clearance hole, and the annular seal partially overlaps with the guide part and the clearance hole respectively.

5. The power storage device according to claim 1, wherein The housing is provided with a baffle wall surrounding the through hole, and a glue-receiving groove is formed in the baffle wall, with at least a portion of the annular seal embedded in the glue-receiving groove.

6. The power storage device according to claim 5, wherein The distance D3 between the rubber-blocking wall and the outer periphery of the annular seal is 3mm ≥ D3 ≥ 0.3mm.

7. The power storage device according to claim 5, wherein The top surface of the adhesive barrier is higher than the top surface of the annular seal.

8. The power storage device according to claim 7, wherein Along the length of the electrical connector, the shortest distance between the top surface of the adhesive barrier and the top surface of the annular seal is D4, where 2mm ≥ D4 ≥ 0.2mm.

9. The power storage device according to claim 2, wherein The outer peripheral surface of the electrical connector has a protruding surface, and in the orthographic projection on the first positioning surface, the sealant partially overlaps with the protruding surface.

10. The power storage device according to any one of claims 1 to 9, wherein It also includes a tab holder, which is located on the side of the circuit board opposite to the electrical connector; The tab support includes a support portion, the circuit board has a connection portion that connects to the electrical connector, and the support portion is disposed around the outer periphery of the connection portion and abuts against the circuit board.

11. The power storage device according to claim 10, wherein The support portion includes multiple spaced-apart support bosses.

12. An electrical device, characterized by Includes the energy storage device as described in any one of claims 1 to 11.

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