Electricity storage device and electric equipment

Abstract

The utility model provides an electricity storage device and electric equipment with the same. The electricity storage device provided by the utility model comprises a battery cell, a circuit board, an electric connector, a shell and colloid. And the battery cell is provided with a tab. And the circuit board is electrically connected with the tabs. And the electric connector is electrically connected with the circuit board. A containing cavity is formed in the shell. The accommodating cavity is used for accommodating at least parts of the battery core, the circuit board and the electric connector; the shell is provided with a through hole communicated with the accommodating cavity, and at least part of the electric connector penetrates through the through hole and extends to the external space. And the colloid is filled in the accommodating cavity. And the colloid covers the circuit board and the tabs. And the colloid is fixedly connected with the inner wall surface of the accommodating cavity. By electrically connecting the tabs with the circuit board, coating the circuit board and the tabs with the colloid, and fixedly connecting the colloid with the shell, the electricity storage device provided by the utility model can better protect the circuit board and the tabs to prolong the service life, and can omit a tab bracket, reduce fasteners, simplify the assembly process and reduce the manufacturing cost.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of new energy, in particular to a power storage device and an electric device with the same. BACKGROUND

[0002] The power storage device is used for storing electric energy, and is widely used in various devices. Some power storage devices include a circuit board, which constitutes part or all of a battery management system (BMS) of the power storage device. However, when such a power storage device is subjected to external vibration, the circuit board is easily damaged by the external vibration. SUMMARY

[0003] Therefore, the present disclosure provides a power storage device to at least solve the problem that the circuit board of the previous power storage device is easily damaged by external vibration.

[0004] The power storage device includes a cell, a circuit board, an electrical connector, a shell, and a gel. The cell is provided with a tab. The circuit board is electrically connected to the tab. The electrical connector is electrically connected to the circuit board. The shell is internally provided with a receiving cavity. The receiving cavity contains at least part of the cell, the circuit board, and the electrical connector. The shell is provided with a through hole communicating with the receiving cavity, and at least part of the electrical connector passes through the through hole and extends to an external space. The gel is filled in the receiving cavity. The gel covers the circuit board and the tab. The gel is fixedly connected to the inner wall surface of the receiving cavity.

[0005] Additionally or alternatively, the cell includes a body portion and a tab extending from the body portion. The tab is welded to the circuit board. The electrical connector and the body portion are located on opposite sides of the circuit board. The gel covers at least one end of the body portion close to the circuit board.

[0006] Additionally or alternatively, the power storage device includes a plurality of cells stacked and arranged, and two support plates. The two support plates are respectively located on opposite sides of the plurality of cells in the stacking direction. The gel covers at least one end of each of the two support plates close to the circuit board. The gel is fixedly connected to the two support plates.

[0007] Additionally or alternatively, the two support plates are epoxy resin plates or polypropylene plates.

[0008] Additionally or alternatively, the shell includes an upper shell and a lower shell. The gel is fixedly connected to the upper shell and the lower shell, respectively. The through hole is provided in the upper shell.

[0009] Additionally or alternatively, the lower shell includes a bottom wall. The bottom wall is located on a side of the lower shell away from the upper shell. The bottom wall is provided with a glue injection port.

[0010] Additionally or alternatively, the bottom wall is provided with a waterproof and breathable film covering the glue injection port.

[0011] Additionally or alternatively, part of the colloid is located between the inner surface of the through hole facing the accommodating cavity and the electrical connector, and the colloid seals the connection between the outer shell and the electrical connector.

[0012] Additionally or alternatively, the outer shell is provided with a first clamping part, and the electrical connector is provided with a second clamping part. The first clamping part is snap-connected with the second clamping part.

[0013] The present disclosure also provides a power storage device.

[0014] According to the power storage device provided by the present disclosure, on the one hand, the circuit board is electrically connected with the tab, and the tab is flexible, so that the circuit board and the battery cell form a flexible connection directly, and such a flexible connection has the effects of buffering and absorbing vibration; in the process of transmission from the battery cell to the circuit board, vibration can be absorbed and dissipated by such a flexible connection, so as to be difficult to be transmitted to the circuit board. On the other hand, the colloid wraps the circuit board and is fixedly connected with the inner wall surface of the accommodating cavity, that is, the circuit board is not rigidly connected with the outer shell directly, but is fixedly connected with the outer shell through the colloid; in the process of transmission from the outer shell to the circuit board, vibration needs to pass through the colloid to reach the circuit board; since the colloid has better elasticity and flexibility compared with the outer shell and the circuit board, the colloid has certain effects of buffering and absorbing vibration; when vibration passes through the colloid, it can also be absorbed and dissipated, so as to be difficult to be transmitted to the circuit board. Due to these two reasons, in the power storage device provided by the present disclosure, vibration in the environment will be less transmitted to the circuit board, the risk of damage of the circuit board caused by vibration is smaller, and the service life of the power storage device will be prolonged.

[0015] In addition, according to the power storage device provided by the present disclosure, the colloid wraps the tab and the circuit board, and isolates the tab and the circuit board from the environment outside the colloid, so that substances such as air, water vapor and liquid that can cause oxidation or damage of the circuit board will not come into contact with the circuit board and the tab. This helps to reduce the risk of damage of the battery cell and the circuit board, thereby further prolonging the service life of the power storage device.

[0016] In addition, according to the power storage device provided by the present disclosure, the tab is electrically connected with the circuit board, the colloid wraps the tab and the circuit board, and the colloid is fixedly connected with the inner wall surface of the accommodating cavity. Compared with the conventional power storage device, the power storage device provided by the present disclosure eliminates the tab support, and therefore eliminates the fastener for fixing the tab support to the outer shell, and also eliminates the fastener for fixedly connecting the circuit board with the outer shell, and eliminates the process of installing these fasteners, which all help to reduce the manufacturing cost of the power storage device. BRIEF DESCRIPTION OF DRAWINGS

[0017] 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.

[0018] It should be understood that the same or like reference numerals are used to represent the same or like elements in the drawings.

[0019] It should be understood that the drawings are only schematic, and that the sizes and proportions of the elements in the drawings are not necessarily to scale.

[0020] Figure 1 A structural schematic diagram of the power storage device is shown.

[0021] Figure 2 A structural schematic diagram of the power storage device is shown. Figure 1 A structural schematic diagram of the power storage device is shown.

[0022] Figure 3 A structural schematic diagram of the power storage device is shown. Figure 1 A structural schematic diagram of the power storage device is shown.

[0023] Figure 4 A structural schematic diagram of the power storage device is shown. Figure 3 A structural schematic diagram of the power storage device is shown.

[0024] Figure 5 A structural schematic diagram of the power storage device is shown. Figure 1 A structural schematic diagram of the power storage device is shown.

[0025] Reference signs: 100, power storage device; 10, battery cell; 11, tab; 12, body part; 20, circuit board; 30, electrical connector; 31, second clamping part; 40, housing; 41, accommodating cavity; 42, through hole; 43, upper shell; 44, lower shell; 441, bottom wall; 4411, glue injection port; 4412, waterproof and breathable film; 45, first clamping part; 50, glue; 60, support plate; 1000, electrical equipment. DETAILED DESCRIPTION

[0026] Power storage devices are widely used in various electrical equipment and systems. Some power storage devices are used in use scenarios with vibration, such as in vehicles.

[0027] In some embodiments, the power storage device can be a start-stop battery pack, a low-voltage battery pack, a power battery pack, or an energy storage module, etc.

[0028] Some power storage devices include a circuit board. The circuit board constitutes part or all of the battery management system (BMS) of the power storage device, which is a key component to ensure the safe operation of the power storage device, improve the performance of the power storage device, and prolong the service life of the power storage device.

[0029] For example, the battery management system can be used to monitor key parameters of the power storage device in real time, including voltage and temperature, etc. The voltage can be obtained by a voltage sensor, and the temperature can be obtained by a thermistor. The voltage sensor and the thermistor can transmit the monitored parameters such as voltage and temperature to the circuit board through a low-voltage circuit.

[0030] According to the monitored key parameters, the battery management system can realize various functions, such as providing overvoltage and undervoltage protection to effectively prevent the battery from exceeding the safe voltage range during charging or discharging.

[0031] In addition, the battery management system can also support overcurrent protection to prevent the battery from generating current exceeding the rated value, and continuously monitor the battery temperature to prevent overheating in time. According to actual needs, other various electronic components can also be arranged on the circuit board.

[0032] In addition to monitoring parameters such as voltage and temperature inside the power storage device, the battery management system can also transmit data with external devices. For example, an electrical connector can be arranged on the circuit board, one end of which can be connected to the circuit board, and the other end can extend outside the power storage device through the shell of the power storage device to be electrically connected with external devices.

[0033] As a key component of the battery management system, the reliable operation of the circuit board is the premise of the normal work of the power storage device. When the power storage device is subjected to external vibration, the protection of the circuit board is particularly important. The circuit board of the previous power storage device has the problem of being easily damaged by external vibration. Research has found that in the previous power storage device, the circuit board is directly or indirectly rigidly connected with the shell, which is one of the important reasons why the circuit board is easily damaged by external vibration. For ease of understanding, the previous power storage device and its problems are briefly described below.

[0034] The previous power storage device usually includes a battery cell, a tab support, a circuit board, and a shell accommodating and protecting them. The battery cell includes a battery cell body and a tab. The tab passes through the tab support and is connected with a conductive row on the tab support. The tab support is fixedly connected with the shell by a fastener (such as a screw). The circuit board is fixedly connected with the tab support, and this connection can be either through a fastener (such as a screw) or the conductive rows of the two are welded together. In any case, the connection of the two is rigid. In some power storage devices, the circuit board can also be directly connected with the shell by a fastener (such as a screw).

[0035] It is found that when the power storage device is subjected to external vibration, the vibration received by the shell is directly transmitted to the tab support due to the fact that the tab support is fixed on the shell. Since the circuit board is fixed on the tab support, the vibration is also directly transmitted to the circuit board through the connecting part of the tab support and the circuit board. Under the influence of external vibration, not only is the circuit board itself prone to damage, but also the electronic components and electrical connectors provided on the circuit board are prone to damage, or the welding of these electronic components or electrical connectors and the circuit board may be disconnected, which all leads to the circuit board losing all or part of its function, and further leads to the power storage device being unable to operate normally. Therefore, there is an urgent need for a solution that can reduce the influence of external vibration on the circuit board.

[0036] To solve this problem, the present disclosure provides a power storage device. The power storage device provided by the present disclosure includes a battery cell, a circuit board, an electrical connector, a shell, and a gel. The battery cell is provided with a tab. The circuit board is electrically connected to the tab. The electrical connector is electrically connected to the circuit board. The shell is internally provided with a receiving cavity. The receiving cavity contains at least part of the battery cell, the circuit board, and the electrical connector. The shell is provided with a through hole communicating with the receiving cavity, and at least part of the electrical connector passes through the through hole and extends to the outside space. The gel is filled in the receiving cavity. The gel covers the circuit board and the tab. The gel is fixedly connected to the inner wall surface of the receiving cavity.

[0037] According to the power storage device provided by the present disclosure, on the one hand, the circuit board is electrically connected to the tab, and the tab is flexible, so the circuit board and the battery cell will form a flexible connection, and this flexible connection has the effect of buffering and absorbing vibration; in the process of transmission from the battery cell to the circuit board, the vibration will be absorbed and dissipated by this flexible connection, so it is difficult to be transmitted to the circuit board. On the other hand, the gel wraps the circuit board and is fixedly connected to the inner wall surface of the receiving cavity, that is, the circuit board is not directly and rigidly connected to the shell, but is fixedly connected to the shell through the gel; in the process of transmission from the shell to the circuit board, the vibration needs to pass through the gel to reach the circuit board; since the gel has better elasticity and flexibility than the shell and the circuit board, it has a certain effect of buffering and absorbing vibration; when the vibration passes through the gel, it will also be absorbed and dissipated, so it is difficult to be transmitted to the circuit board. Due to these two reasons, in the power storage device provided by the present disclosure, the vibration in the environment will be less transmitted to the circuit board, the risk of damage to the circuit board due to vibration is smaller, and the service life of the power storage device will be prolonged.

[0038] In addition, according to the power storage device provided by the present disclosure, the gel covers the tab and the circuit board, and isolates the tab and the circuit board from the environment outside the gel, so that substances such as air, water vapor, and liquid that may cause oxidation or damage to the circuit board will not come into contact with the circuit board and the tab. This helps to reduce the risk of damage to the battery cell and the circuit board, thereby further prolonging the service life of the power storage device.

[0039] In addition, the electric storage device provided by the present disclosure is provided. The tab is electrically connected with the circuit board. The colloid wraps the tab and the circuit board. The colloid is fixedly connected with the inner wall surface of the accommodating cavity. Compared with the prior art, the electric storage device provided by the present disclosure saves the tab support, and thus saves the fastener for fixing the tab support on the shell, saves the fastener for fixedly connecting the circuit board with the shell, and saves the process of installing these fasteners, which helps to reduce the manufacturing cost of the electric storage device.

[0040] Many specific details are set forth below to provide an understanding of the structure, function, and use of the embodiments described and shown in the specification. It will be appreciated that the embodiments described and shown are non-limiting examples, and that the particular structural and functional details described and shown can be representative and exemplary. Embodiments can be modified and changed without departing from the scope of the claims.

[0041] It should be noted that the terms "comprising" (and any form of comprising, having, including and containing) "provided with" (and any form of provided with) in the present disclosure are open-ended connective verbs. Therefore, the device, equipment, member or part "comprising", "having", "provided with" one or more elements has the one or more elements, but is not limited to only having the one or more elements.

[0042] As Figures 1 to 3 shown, the present disclosure provides an electric storage device 100. For the convenience of understanding, the structure of the electric storage device 100 will be described below. It should be understood that the structure of the electric storage device 100 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.

[0043] The electric storage device 100 includes an electric core 10, a circuit board 20, an electric connector 30, a shell 40 and a colloid 50. The electric core 10 is provided with a tab 11. The circuit board 20 is electrically connected with the tab 11. The electric connector 30 is electrically connected with the circuit board 20. The shell 40 is internally provided with an accommodating cavity 41. The accommodating cavity 41 internally accommodates at least part of the electric core 10, the circuit board 20 and the electric connector 30. The shell 40 is provided with a through hole 42 communicating with the accommodating cavity 41. At least part of the electric connector 30 passes through the through hole 42 and extends to the outside space. The colloid 50 is filled in the accommodating cavity 41. The colloid 50 wraps the circuit board 20 and the tab 11. The colloid 50 is fixedly connected with the inner wall surface of the accommodating cavity 41.

[0044] The electric cell 10, as a basic energy storage unit, is the core part of the power storage device 100 that carries out chemical reaction and stores electric energy. The electric cell 10 can include a positive electrode, a negative electrode, an electrolyte, a separator, and the like, and can store and release electric energy in a chemical reaction. The electric cell 10 can be a soft-pack electric cell or the like. The electric cell 10 can be a repeated charging and discharging electric cell, and the power storage device 100 including such an electric cell is generally referred to as a secondary battery, such as a lithium ion battery, a lead-acid battery, a nickel-hydrogen battery, a nickel-cadmium battery, and the like.

[0045] Regardless of the type of electric cell, the connection between the inside of the electric cell and the external circuit, and the input and output of current, are achieved through the tab. The tab 11 can be a metal strip supported by aluminum, tin, copper-nickel plating, and oxygen-free copper, and the like, thereby having good structural strength and being convenient for compounding with a film to ensure the sealing of the package. The tab 11 can be connected to the inside of the electric cell 10 by laser welding or ultrasonic welding, or the like.

[0046] The circuit board 20 can form part or all of the battery management system (BMS) of the power storage device 100, for example. Various electronic components and electrical connectors 30, and the like, can be provided on the circuit board 20 as needed. In order to achieve electrical connection between the circuit board 20 and the tab 11, the tab 11 can be mechanically connected to the circuit board 20 by welding or the like. After the electrical connector 30 is electrically connected to the circuit board 20, it can be connected to the low-voltage circuit or the high-voltage circuit of the power storage device 100 to achieve the corresponding function. At least part of the electrical connector 30 passes through the through hole 42 of the housing and extends to the outside space, thereby facilitating connection with an external electrical connector. The circuit board 20 can be made of FR-4 or the like, thereby having good insulation performance, mechanical strength, and temperature resistance.

[0047] The electrical connector 30 can be a low-voltage electrical connector connected to a low-voltage circuit for transmitting sensing signals and control signals. The electrical connector 30 can also be a high-voltage electrical connector connected to a charging and discharging circuit of the power storage device. The electrical connector 30 can also be a low-voltage and high-voltage integrated electrical connector connected to both the low-voltage circuit and the high-voltage circuit to simultaneously achieve the functions of signal transmission and charging and discharging. The specific structure of the electrical connector 30 can also be designed according to actual needs. The electrical connector 30 can include a base, a peripheral wall provided around the base, and a contact provided on the peripheral wall, for example. The base is used to fix the contact, and the peripheral wall is used to protect the contact. When the electrical connector 30 is connected to an external electrical connector, the contact of the electrical connector 30 is connected to the contact of the external electrical connector, so that a loop is formed between the power storage device 100 and an external device.

[0048] The colloid 50 is fixedly connected to the inner wall of the accommodating cavity 41, meaning that the colloid 50 adheres to the inner wall of the accommodating cavity 41 after curing. Since the colloid 50 covers the circuit board 20 and the tab 11, it also adheres to the circuit board 20 and the tab 11 after curing, thus providing fixation and support for the circuit board 20 and the tab 11. The colloid 50 is both fixedly connected to the inner wall of the accommodating cavity 41 and adhered to the circuit board 20, thereby indirectly fixing and supporting the circuit board 20 on the outer shell 40.

[0049] The energy storage device 100 provided in this embodiment of the present disclosure electrically connects the tab 11 to the circuit board 20, uses colloid 50 to cover the circuit board 20 and the tab 11, and uses colloid 50 to fix and connect to the inner wall of the accommodating cavity 41. First, the flexible connection formed by the electrical connection between the tab 11 and the circuit board 20, and the encapsulation of the circuit board 20 by the colloid 50, both serve to buffer and dampen vibrations. This prevents external vibrations from being transmitted to the circuit board 20 through the rigid connection between other components in the energy storage device 100 and the circuit board 20, thereby effectively reducing the risk of damage to the circuit board 20 due to external vibrations. Second, the encapsulation of the circuit board 20 and the tab 11 by the colloid 50 effectively prevents the circuit board 20 and the tab 11 from being exposed to the external environment, thus protecting the circuit board 20 and the tab 11. Third, the circuit board 20 is indirectly fixed and supported on the outer shell 40 by the fixed connection between the colloid 50 and the inner wall of the accommodating cavity 41. This eliminates the need for tab supports, fasteners for fixing the tab supports, and fasteners for fixing the circuit board 20, and saves corresponding processes, effectively reducing the manufacturing cost of the energy storage device 100.

[0050] In some embodiments, such as Figure 2 and Figure 3 As shown, the battery cell 10 includes a body portion 12 and a tab 11 extending from the body portion 12. The tab 11 is soldered to a circuit board 20. An electrical connector 30 and the body portion 12 are located on opposite sides of the circuit board 20. An adhesive 50 covers at least one end of the body portion 12 near the circuit board 20.

[0051] The tab 11 is connected to the circuit board 20 by soldering, which can form a good connection strength and prevent the tab 11 from detaching from the circuit board 20 when subjected to external vibration.

[0052] By placing the electrical connector 30 and the body 12 on opposite sides of the circuit board 20, the space within the width range of the circuit board 20 can be fully utilized on opposite sides of the circuit board 20, thereby saving space.

[0053] The tab 11 is usually a metal strip, and the body part 12 and the circuit board 20 have greater rigidity than the tab 11. Therefore, when one end of the tab 11 is connected to the body part 12 with greater rigidity and the other end is connected to the circuit board 20 with greater rigidity, a structure with rigidity in the middle and flexibility at both ends is formed. When subjected to external vibration, if the end of the body part 12 close to the circuit board 20 has a large relative displacement with the circuit board 20, and the tab 11 between the body part 12 and the circuit board 20 has small rigidity, it is likely to cause the tab 11 to be damaged under the excessive pulling force applied by the body part 12 and the circuit board 20 at both ends thereof.

[0054] Therefore, the gel 50 at least covers the end of the body part 12 close to the circuit board 20. When the power storage device 100 is subjected to external vibration, on the one hand, the gel 50 can effectively prevent the end of the body part 12 close to the circuit board 20 from having a large relative displacement with the circuit board 20 after the gel 50 is solidified, thereby avoiding the tab 11 between the circuit board 20 and the body part 12 from being damaged due to the large pulling force. On the other hand, the gel 50 has a buffering and damping effect, which can reduce the influence of external vibration on the tab 11.

[0055] In some embodiments, as shown in Figs. 1 and 2, the power storage device 100 includes a plurality of stacked battery cells 10 and a support plate 60. The support plate 60 is located on one side of the plurality of stacked battery cells 10 in the stacking direction. The gel 50 at least covers one end of the support plate 60 close to the circuit board 20. The gel 50 is fixedly connected to the support plate 60. By arranging the support plate 60 on one side of the plurality of stacked battery cells 10 in the stacking direction, the external vibration can be effectively absorbed, thereby protecting the plurality of stacked battery cells 10. Figure 2 Figure 3 As shown in Figs. 1 and 2, the power storage device 100 includes a plurality of stacked battery cells 10 and a support plate 60. The support plate 60 is located on one side of the plurality of stacked battery cells 10 in the stacking direction. The gel 50 at least covers one end of the support plate 60 close to the circuit board 20. The gel 50 is fixedly connected to the support plate 60. By arranging the support plate 60 on one side of the plurality of stacked battery cells 10 in the stacking direction, the external vibration can be effectively absorbed, thereby protecting the plurality of stacked battery cells 10.

[0056] The gel 50 is fixedly connected to the two support plates 60, which means that the gel 50 is adhered to the two support plates 60 after being solidified, thereby fixing and supporting the two support plates 60. Since the gel 50 at least covers one end of each of the two support plates 60 close to the circuit board 20 and covers the circuit board 20, a reliable connection is formed between the two support plates 60 and the circuit board 20, which not only supports the plurality of stacked battery cells 10 but also supports the circuit board 20, and enhances the overall rigidity of the structure.

[0057] ​It should be noted that the end of each of the two support plates 60 closest to the circuit can be in direct contact with the circuit board 20, or it can be in direct contact with the circuit board 20. When the end of each of the two support plates 60 closest to the circuit is in direct contact with the circuit board 20, it can directly provide support for the circuit board 20; when the end of each of the two support plates 60 closest to the circuit is not in direct contact with the circuit board 20, it can indirectly provide support for the circuit board 20 through the colloid 50.

[0058] In some embodiments, the two support plates 60 are epoxy resin plates or polypropylene plates. Epoxy resin plates have good rigidity and can provide good support for the battery cell 10 and circuit board 20. Polypropylene plates are cheaper, saving costs; moreover, they have better ductility than epoxy resin plates, providing better cushioning and vibration damping, thereby reducing the impact of external vibrations on the battery cell 10 and circuit board 20.

[0059] The housing 40 can be a single, integrally formed housing 40, or it can comprise multiple housings. When the housing 40 comprises multiple housings, the multiple housings can be connected by means of welding or fasteners to form the housing 40. For example... Figures 1 to 3 As shown, in some embodiments, the outer casing 40 includes an upper casing 43 and a lower casing 44. Adhesive 50 is fixedly connected to the upper casing 43 and the lower casing 44 respectively. A through hole 42 is provided in the upper casing 43. The outer casing 40 is formed by combining the upper casing 43 and the lower casing 44, which facilitates the assembly of the energy storage device 100. The adhesive 50 fixing the upper casing 43 and the lower casing 44 respectively means that the cured adhesive 50 adheres to the upper casing 43 and the lower casing 44, thereby fixing and supporting the upper casing 43 and the lower casing 44. By fixing the upper casing 43 and the lower casing 44 with adhesive 50, there is no need to use welding or fasteners to connect the upper casing 43 and the lower casing 44. Therefore, the adhesive 50 can not only cover the components within the accommodating cavity 41, but also be used to connect the upper casing 43 and the lower casing 44 to form the outer casing 40, thus achieving dual use and saving materials and costs.

[0060] In some embodiments, such as Figure 3 As shown, the lower housing 44 includes a bottom wall 441. The bottom wall 441 is located on the side of the lower housing 44 away from the upper housing 43. The bottom wall 441 has a glue inlet 4411. Because the glue inlet 4411 is provided on the bottom wall 441, when the energy storage device 100 is inverted for glue filling, the bottom wall 441 will be placed at the top. At this time, glue can be filled from above simply by aligning the glue inlet 4411 with the glue outlet of the glue filling equipment. During glue filling, the uncured glue 50 can flow vertically to the target area under the action of gravity, which has the characteristics of easy process implementation and high production line automation.

[0061] In some embodiments, as shown in Figure 3 A waterproof and breathable film 4412 is provided on the bottom wall 441 to cover the glue injection port 4411.

[0062] The waterproof and breathable film 4412 includes a plurality of small holes with a hole diameter smaller than the diameter of a water droplet but larger than the diameter of a gas, thereby achieving waterproof and breathable. The waterproof and breathable film 4412 can effectively prevent external moisture such as rainwater and car washing water from entering the inside of the power storage device 100, protecting the power storage device 100 from moisture and corrosion. In addition to the waterproof function, the waterproof and breathable film 4412 can also block the entry of dust and other small particulate matter, keeping the inside of the power storage device 100 clean. Through the breathable performance, the waterproof and breathable film 4412 can accelerate the air circulation inside the power storage device 100, improve the heat dissipation efficiency, and avoid the performance degradation or damage of the battery caused by high temperature.

[0063] When the internal air pressure of the power storage device 100 reaches a certain threshold, the waterproof and breathable film 4412 can automatically burst to ensure that the power storage device 100 can be timely relieved to avoid explosion. If necessary, the waterproof and breathable film 4412 can also be manually punctured. By covering the glue injection port 4411 with the waterproof and breathable film 4412, the existing glue injection port 4411 can be used as the installation space of the waterproof and breathable film 4412, saving the process of opening a special hole position to install the waterproof and breathable film 4412, thereby improving the production efficiency.

[0064] As described above, in order to charge and discharge or communicate data with external devices, an electrical connector 30 is usually provided in the power storage device 100 and connected to the high-voltage circuit or low-voltage circuit of the power storage device 100. The electrical connector 30 extends through the through hole 42 on the shell 40 to the external space to connect with the external electrical connector.

[0065] However, there will be a gap between the electrical connector 30 and the hole wall of the through hole 42, and external dust and liquid may enter the inside of the power storage device 100 through the gap and cause damage to the power storage device 100.

[0066] Therefore, in some embodiments, as shown in Figure 3 and Figure 4 Part of the glue body 50 is located between the inner surface of the through hole 42 facing the accommodating cavity 41 and the electrical connector 30, and the glue body 50 seals the connection between the shell 40 and the electrical connector 30.

[0067] The housing 40 may include a plastic base for fixing, supporting, and protecting the electrical connector. The inner surface of the through-hole 42 facing the receiving cavity 41 may be the bottom wall of the plastic base. By filling a portion of the adhesive 50 between the inner surface of the through-hole 42 facing the receiving cavity 41 and the electrical connector 30, and sealing the housing 40 and the electrical connector 30, external dust and liquids can be prevented from entering the energy storage device 100 through the gap between the through-hole 42 and the electrical connector 30 and causing damage to the energy storage device 100. Furthermore, it eliminates the need for a dedicated sealing device to seal the gap, thus achieving a dual purpose and saving costs.

[0068] During the insertion and removal of the external connector, the electrical connector 30 is subjected to insertion and removal forces in the insertion and removal direction. Since the electrical connector 30 is connected to the circuit board 20, the insertion and removal forces will be transmitted to the circuit board 20 through the electrical connector 30. If the insertion and removal forces are too large, it is very likely to damage the circuit board 20.

[0069] Therefore, as Figure 3 As shown, in some embodiments, the housing 40 is provided with a first engaging portion 45, and the electrical connector 30 is provided with a second engaging portion 31. The first engaging portion 45 and the second engaging portion 31 are snapped together. This snap-connection of the first engaging portion 45 and the second engaging portion 31 ensures that, during insertion and removal, the insertion and removal force experienced by the electrical connector 30 is directly transmitted to the housing 40, rather than to the circuit board 20, thus protecting the circuit board 20. Furthermore, since the electrical connector 30 and the housing 40 can be easily connected via snap-connection without the need for fasteners (e.g., screws) during assembly, and can be easily separated during disassembly, the assembly and disassembly process of the electrical connector 30 and the housing 40 is simplified, which helps improve the production efficiency of the energy storage device 100 and reduces its production cost.

[0070] This disclosure also provides an electrical appliance 1000. For example... Figure 5 As shown, electrical equipment 1000 may include the aforementioned energy storage device 100. By way of example only, electrical equipment 1000 may include, but is not limited to, vehicles, household appliances, and industrial equipment. By way of example only, vehicles may include, but are not limited to, passenger cars, sports utility vehicles (SUVs), multi-purpose vehicles (MPVs), passenger vehicles, freight vehicles, and construction machinery. In a vehicle, the energy storage device 100 may be used as a power battery and a start-stop battery, etc. 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.

[0071] It should be noted that each of the elements described in the above detailed description of the specific embodiments can be combined in any suitable manner in the absence of contradictions. To avoid unnecessary repetition, the present disclosure will not describe each possible combination.

[0072] It should be understood that multiple components and / or parts described can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into separate multiple components and / or parts. The disclosure using "a" or "one" to describe a component or part is not intended to exclude other components or parts.

[0073] It should be understood that although the terms "first" or "second" and the like can be used herein to describe various elements, such as the first engaging portion and the second engaging portion, these elements are not limited by these terms since the terms are only used to distinguish one element from another.

[0074] The above describes the basic principles of the present disclosure in combination with specific embodiments, but it should be noted that the advantages, benefits, effects and the like mentioned in the present disclosure are only examples and are not limiting, and these advantages, benefits, effects and the like cannot be considered as necessary for each embodiment of the present disclosure. In addition, the above specific details are only for the purpose of example and for the purpose of understanding, and the above details do not limit the present disclosure to the above specific details.

[0075] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present disclosure, which should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. An energy storage device, characterized in that, include: The battery cell has tabs. The circuit board is electrically connected to the electrode tab; An electrical connector, electrically connected to the circuit board; The housing has an internal cavity that accommodates at least a portion of the battery cell, the circuit board, and the electrical connector. The housing has a through hole that communicates with the cavity, and at least a portion of the electrical connector passes through the through hole and extends into the external space. A colloid is filled in the accommodating cavity, the colloid covers the circuit board and the tab, and the colloid is fixedly connected to the inner wall of the accommodating cavity.

2. The energy storage device according to claim 1, characterized in that, The battery cell includes a body portion and the electrode tabs extending from the body portion; The electrode tab is soldered to the circuit board, the electrical connector and the body are located on opposite sides of the circuit board, and the colloid covers at least one end of the body near the circuit board.

3. The energy storage device according to claim 2, characterized in that, The energy storage device includes a plurality of stacked battery cells and two support plates, the two support plates being located on opposite sides of the plurality of battery cells in the stacking direction; The colloid covers at least one end of each of the two support plates near the circuit board, and the colloid fixes the two support plates together.

4. The energy storage device according to claim 3, characterized in that, The two support plates are epoxy resin plates or polypropylene plates.

5. The energy storage device according to claim 1, characterized in that, The outer shell includes an upper shell and a lower shell, the colloid is fixedly connected to the upper shell and the lower shell respectively, and the through hole is provided in the upper shell.

6. The energy storage device according to claim 5, characterized in that, The lower housing includes a bottom wall located on the side of the lower housing away from the upper housing, and the bottom wall has an injection port.

7. The energy storage device according to claim 6, characterized in that, The bottom wall is provided with a waterproof and breathable membrane that covers the glue injection port.

8. The energy storage device according to claim 1, characterized in that, A portion of the colloid is located between the inner surface of the through-hole facing the accommodating cavity and the electrical connector, and the colloid seals the connection between the housing and the electrical connector.

9. The energy storage device according to claim 1, characterized in that, The housing is provided with a first engaging portion, and the electrical connector is provided with a second engaging portion, and the first engaging portion and the second engaging portion are snapped together.

10. An electrical appliance, characterized in that, Includes an energy storage device according to any one of claims 1 to 9.

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