A battery cover plate assembly and a battery

Abstract

The utility model belongs to battery technical field, specifically discloses a kind of battery cover plate assembly and battery, and battery cover plate assembly includes top cover piece, first plastic piece, intelligent monitoring module and power supply switch.The first plastic piece is equipped with first fixed groove and second fixed groove on the plastic body, and the intelligent monitoring module is arranged in the first fixed groove, and the power supply switch is arranged in the second fixed groove. Thus, the intelligent monitoring module and power supply switch are integrated on the first plastic piece, and the assembly structure is simple. The power supply switch, the intelligent monitoring module and the battery cell are connected in series through the connecting circuit, and the battery cell supplies power to the intelligent monitoring module. The power supply switch can control the on-off of the connecting circuit, thereby selectively supplying power to the intelligent monitoring module. Between the liquid injection and formation process of the battery, the power supply switch remains open, the intelligent monitoring module is in an open circuit state, and the safety of the battery is high. The utility model also provides a battery, which comprises the above-mentioned battery cover plate assembly.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery cover assembly and a battery. Background Technology

[0002] In battery applications, effective monitoring of battery status is crucial to ensure safety and extend battery life. Typically, an intelligent monitoring module can be installed inside the battery to monitor key parameters such as internal pressure and temperature in real time. However, this module requires connection to an external Battery Management System (BMS) via wiring to transmit the monitored information to the BMS display. This inevitably leads to complex wiring and low integration. Furthermore, currently, the intelligent monitoring module is electrically connected to the battery cells during the electrolyte injection and formation processes after battery assembly, resulting in low safety of the internal battery circuitry. Utility Model Content

[0003] The purpose of this utility model is to provide a battery cover assembly and a battery that ensures the intelligent monitoring module is disconnected between the battery liquid injection and formation processes, thus ensuring high battery safety. Furthermore, the intelligent monitoring module and the power supply switch are both integrated on the battery cover assembly, resulting in a simple structure and easy manufacturing.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] On one hand, this utility model provides a battery cover assembly, comprising:

[0006] Top cover plate;

[0007] A first plastic component is disposed on one side of the top cover plate. The first plastic component includes a plastic component body, a first buckle plate, and a second buckle plate. The side of the plastic component body opposite to the top cover plate is provided with a first fixing groove and a second fixing groove.

[0008] The intelligent monitoring module is installed in the first fixing slot and encapsulated by the first buckle plate;

[0009] A power supply switch is installed in the second fixing slot and encapsulated by the second buckle plate. The power supply switch, the intelligent monitoring module and the battery cell are connected in series.

[0010] Optionally, a first conductive bus and a second conductive bus are led out from the two ends of the power supply switch, and a third conductive bus and a fourth conductive bus are led out from the two ends of the intelligent monitoring module. The first conductive bus is electrically connected to the positive terminal of the battery cell, the second conductive bus is electrically connected to the third conductive bus, and the fourth conductive bus is electrically connected to the negative terminal of the battery cell.

[0011] Optionally, the first plastic part has a wiring groove on the side opposite to the top cover plate, and the first conductive bar, the second conductive bar, the third conductive bar and the fourth conductive bar are installed in the wiring groove.

[0012] Optionally, one of the first buckle plate and the first fixing groove is provided with a first buckle, and the other of the first buckle plate and the first fixing groove is provided with a first locking protrusion, and the first buckle engages with the first locking protrusion.

[0013] Optionally, the bottom wall of the second fixing groove is provided with a limiting part, which abuts against the power supply switch.

[0014] Optionally, one of the second buckle plate and the second fixing groove is provided with a second buckle, and the other of the second buckle plate and the second fixing groove is provided with a second locking protrusion, and the second buckle engages with the second locking protrusion.

[0015] Optionally, the first buckle plate is provided with a first through hole;

[0016] And / or, the top cover plate is provided with a first injection hole, the bottom wall of the second fixing groove is provided with a second injection hole, the second buckle plate is provided with a second through hole, and the first injection hole, the second injection hole and the second through hole are connected.

[0017] Optionally, the power supply switch is a pressure-sensitive switch, and a sealing pin is provided in the first injection hole. The sealing pin presses against the power supply switch to close it.

[0018] Optionally, the intelligent monitoring module includes a controller and several detection units electrically connected to the controller. The detection units are used to detect at least one of temperature information and air pressure information inside the battery. The detection units send the temperature information and / or the air pressure information to the battery management system via the controller.

[0019] On the other hand, the present invention provides a battery including the battery cover assembly of any of the above-mentioned solutions.

[0020] The beneficial effects of this utility model are as follows:

[0021] This utility model provides a battery cover assembly, including a top cover sheet, a first plastic part, an intelligent monitoring module, and a power switch. The first plastic part includes a plastic part body, a first snap-on plate, and a second snap-on plate. The plastic part body has a first fixing groove and a second fixing groove. The intelligent monitoring module is disposed in the first fixing groove and encapsulated by the first snap-on plate. The power switch is disposed in the second fixing groove and encapsulated by the second snap-on plate. Thus, the intelligent monitoring module and the power switch are integrated on the first plastic part, resulting in a simple assembly structure. The power switch, the intelligent monitoring module, and the battery cell are connected in series via a connecting circuit, with the battery cell supplying power to the intelligent monitoring module. The power switch can control the on / off state of the connecting circuit, thereby selectively supplying power to the intelligent monitoring module. After the battery cover assembly is assembled with the housing, and between the completion of the liquid injection and formation processes, the power switch is disconnected, ensuring that the intelligent monitoring module is in an open-circuit state, thus ensuring high battery safety.

[0022] This utility model also provides a battery, including the aforementioned battery cover assembly. By using the aforementioned battery cover assembly, the battery has high safety, a simple structure, is easy to manufacture, and has low cost. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the battery cover assembly provided in the embodiment of this utility model;

[0024] Figure 2 This is a structural schematic diagram of the battery cover assembly provided in this embodiment of the present utility model (without showing the first and second clip plates);

[0025] Figure 3 This is an exploded view of the battery cover assembly provided in the embodiment of this utility model;

[0026] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0027] Figure 5 yes Figure 3 A magnified view of a section at point B in the middle;

[0028] Figure 6 This is a schematic diagram of the structure of the first buckle plate provided in this embodiment of the utility model;

[0029] Figure 7 This is a schematic diagram of the structure of the second buckle plate provided in this embodiment of the utility model.

[0030] In the picture:

[0031] 100. Top cover plate; 101. First injection hole; 102. First mounting hole; 103. Third mounting hole;

[0032] 200. First plastic part; 210. Plastic part body; 211. First fixing groove; 2111. First latching protrusion; 212. Second fixing groove; 2121. Second latching protrusion; 2122. Limiting part; 2123. Second injection hole; 2124. Hollowed-out part; 213. Wiring groove; 214. Second mounting hole; 215. Vent hole; 220. First buckle plate; 221. First buckle; 222. First through hole; 230. Second buckle plate; 231. Second buckle; 232. Second through hole;

[0033] 300. Intelligent monitoring module; 310. Third conductive busbar; 320. Fourth conductive busbar;

[0034] 400. Power supply switch; 410. First conductor bus; 420. Second conductor bus;

[0035] 510. Positive electrode adapter; 520. Negative electrode adapter;

[0036] 610. Positive terminal; 620. Negative terminal; 621. Aluminum section; 622. Copper section;

[0037] 700, Second plastic part; 800, Seal; 900, Explosion-proof valve; 910, Explosion-proof valve protective plate. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0042] This embodiment provides a battery cover assembly, which is connected to the housing. The battery cover assembly and the housing together form an accommodating cavity, and the battery cell is arranged in the accommodating cavity.

[0043] like Figures 1-3 As shown, the battery cover assembly includes a top cover 100, a first plastic part 200, an intelligent monitoring module 300, and a power switch 400. The first plastic part 200 is disposed on the side of the top cover 100 near the receiving cavity. The first plastic part 200 includes a plastic body 210, a first snap-fit ​​plate 220, and a second snap-fit ​​plate 230. The side of the plastic body 210 opposite to the top cover 100 has a first fixing groove 211 and a second fixing groove 212. The intelligent monitoring module 300 is disposed in the first fixing groove 211 and encapsulated by the first snap-fit ​​plate 220. The power switch 400 is disposed in the second fixing groove 212 and encapsulated by the second snap-fit ​​plate 230. Thus, the intelligent monitoring module 300 and the power switch 400 are integrated onto the first plastic part 200. This assembly structure is simple, easy to manufacture, and facilitates the arrangement of the connection circuits between the power switch 400, the intelligent monitoring module 300, and the battery cell.

[0044] The power supply switch 400, the intelligent monitoring module 300, and the battery cell are connected in series via a connecting circuit, with the battery cell supplying power to the intelligent monitoring module 300. The power supply switch 400 can control the on / off state of the connecting circuit, thereby selectively supplying power to the intelligent monitoring module 300. Between the completion of the battery cover assembly and the housing assembly and the completion of the liquid injection and formation processes, the power supply switch 400 is disconnected, ensuring that the intelligent monitoring module 300 is in an open-circuit state, thus ensuring high battery safety.

[0045] See also Figure 2 and Figure 3 The power switch 400 has a first conductive busbar 410 and a second conductive busbar 420 leading out from its two ends, and the intelligent monitoring module 300 has a third conductive busbar 310 and a fourth conductive busbar 320 leading out from its two ends. The first conductive busbar 410 is electrically connected to the positive terminal adapter 510 of the battery cell by welding, the second conductive busbar 420 is electrically connected to the third conductive busbar 310 by welding, and the fourth conductive busbar 320 is electrically connected to the negative terminal adapter 520 of the battery cell by welding. The positive terminal adapter 510, the first conductive busbar 410, the second conductive busbar 420, the third conductive busbar 310, the fourth conductive busbar 320, and the negative terminal adapter 520 together form the connection circuit between the power switch 400, the intelligent monitoring module 300, and the battery cell. The first plastic part 200 has a wiring groove 213 on the side opposite to the top cover plate 100, and the first conductive busbar 410, the second conductive busbar 420, the third conductive busbar 310, and the fourth conductive busbar 320 are installed in the wiring groove 213. The wiring channel 213 makes the battery cover assembly more compact and orderly, and the connection circuit layout simple.

[0046] Optionally, the first conductive bus 410, the second conductive bus 420, the third conductive bus 310, and the fourth conductive bus 320 can be made of copper or aluminum. Copper and aluminum busbars have a certain rigidity, making them easy to fix. Of course, in other embodiments, the first conductive bus 410, the second conductive bus 420, the third conductive bus 310, and the fourth conductive bus 320 can be replaced with copper or aluminum wires. In this case, a snap-fit ​​structure can be used to fix the copper or aluminum wires within the wiring groove 213.

[0047] See Figure 3 , Figure 4 and Figure 6 One of the first buckle plate 220 and the first fixing groove 211 is provided with a first buckle 221, and the other of the first buckle plate 220 and the first fixing groove 211 is provided with a first locking protrusion 2111. The first buckle 221 and the first locking protrusion 2111 are engaged. In this embodiment, the first buckle plate 220 is provided with a first buckle 221 and the groove sidewall of the first fixing groove 211 is provided with a first locking protrusion 2111. The first buckle plate 220 is provided with four first buckles 221 around its perimeter, and the first fixing groove 211 is provided with four first locking protrusions 2111 on the groove sidewall. The first buckles 221 and the first locking protrusions 2111 correspond one-to-one and can be engaged to fix the first buckle plate 220 to the plastic body 210, which is convenient for disassembly and assembly.

[0048] See Figure 3 , Figure 5 and Figure 7One of the second buckle plate 230 and the second fixing groove 212 is provided with a second buckle 231, and the other of the second buckle plate 230 and the second fixing groove 212 is provided with a second locking protrusion 2121. The second buckle 231 and the second locking protrusion 2121 are engaged. In this embodiment, the second buckle plate 230 is provided with a second buckle 231 and the groove sidewall of the second fixing groove 212 is provided with a second locking protrusion 2121 as an example. The second buckle plate 230 is provided with four second buckles 231 around its perimeter, and the second fixing groove 212 is provided with four second locking protrusions 2121 on the groove sidewall. The second buckles 231 and the second locking protrusions 2121 correspond one-to-one and can be engaged and connected, thereby fixing the second buckle plate 230 to the plastic body 210, which is convenient for disassembly and assembly. Furthermore, the bottom wall of the second fixing groove 212 is provided with four limiting parts 2122. The limiting parts 2122 can be L-shaped ribs. Each limiting part 2122 abuts against one corner of the power supply switch 400, thereby ensuring that the power supply switch 400 is accurately positioned and is not prone to shaking.

[0049] See also Figures 3-7 In this embodiment, the first fixing groove 211 is a through groove, and the first buckle plate 220 is provided with a first through hole 222. On the one hand, the first through hole 222 can achieve the effect of weight reduction, which is beneficial to the lightweight design of the battery; on the other hand, the first fixing groove 211 and the receiving cavity can be connected through the first through hole 222, avoiding the formation of a closed space inside the first fixing groove 211, making disassembly and assembly easier.

[0050] Furthermore, the top cover plate 100 is provided with a first injection hole 101, the bottom wall of the second fixing groove 212 is provided with a second injection hole 2123, and the second buckle plate 230 is provided with a second through hole 232. The first injection hole 101, the second injection hole 2123, and the second through hole 232 are connected. Thus, after the battery cover assembly is assembled, electrolyte can be injected into the battery's accommodating cavity through the first injection hole 101, the second injection hole 2123, and the second through hole 232. Of course, the second through hole 232 also serves to reduce weight.

[0051] More preferably, a hollow part 2124 is provided on the bottom wall of the second fixing groove 212. The hollow part 2124 is located around the second injection hole 2123. Electrolyte can be injected into the accommodating cavity of the battery through the first injection hole 101, the hollow part 2124 and the second through hole 232, thereby accelerating the flow rate of the electrolyte and avoiding the risk of leakage during injection.

[0052] Optionally, the power supply switch 400 in this embodiment is a pressure-sensitive switch. A sealing pin is provided in the first liquid injection hole 101. After liquid injection is completed, the sealing pin is installed in the first liquid injection hole 101, pressing the power supply switch 400 closed. This connects the circuit, allowing the battery cell to supply power to the intelligent monitoring module 300. The intelligent monitoring module 300 can monitor key parameters such as internal battery pressure and temperature. It should be noted that after the sealing pin is installed, the power supply switch 400 remains closed, meaning the connection circuit remains continuous during battery use, allowing the battery cell to continuously supply power to the intelligent monitoring module 300. Furthermore, the pressure-sensitive switch can utilize conventional designs found in existing technologies, which will not be elaborated upon here.

[0053] The intelligent monitoring module 300 includes a controller and several detection units electrically connected to the controller. The detection units detect at least one of the following: internal battery temperature and air pressure. The detection units send the temperature and / or air pressure information to the battery management system via the controller, and the information is displayed on the battery management system's display panel. By using the temperature and air pressure information fed back to the battery management system from the controller, it is possible to determine whether the battery is in normal working condition, preventing battery malfunctions caused by abnormal charging or discharging or improper use.

[0054] The controller itself has a wireless transmission unit and has the function of wireless transmission. Therefore, it does not need to be connected to the battery management system by conductive lines, which further simplifies the battery circuit structure. It also eliminates the need for conductive lines to pass through the top cover 100, reducing the risk of electrolyte leakage inside the battery.

[0055] The detection unit can have two components. One component is a pressure sensor, which detects the air pressure inside the battery's housing. The other component is a temperature sensor, which detects the temperature inside the battery's housing.

[0056] Furthermore, the first conductive bus 410, the second conductive bus 420, the third conductive bus 310, the fourth conductive bus 320, the power supply switch 400, and the intelligent monitoring module 300 are all wrapped with a protective film (not shown in the figure). The protective film can protect the above-mentioned structural components from corrosion by the electrolyte inside the battery. For example, the protective film can be made of any one of PVDF film, PI film, or PU film, all of which have good anti-corrosion effect.

[0057] See also Figure 3The battery cover assembly also includes a positive terminal 610, a negative terminal 620, and two second plastic parts 700. The top cover 100 has two first mounting holes 102, and the plastic body 210 of the first plastic part 200 has two second mounting holes 214. The positive terminal 610 passes through one of the second plastic parts 700, one of the first mounting holes 102, and one of the second mounting holes 214 to connect to the positive terminal adapter 510. The negative terminal 620 passes through the other second plastic part 700, the other first mounting hole 102, and the other second mounting hole 214 to connect to the negative terminal adapter 520, thereby leading out the positive and negative terminals of the battery cell through the battery cover assembly, allowing the battery to be charged or discharged. The first plastic parts 200 and the second plastic parts 700 insulate the positive terminal 610 and the negative terminal 620 from the top cover 100. Optionally, one of the second plastic parts 700 is integrally formed with the positive terminal 610 by injection molding, and the second plastic part 700 and the positive terminal 610 constitute the first coated part. The negative terminal 620 includes an aluminum part 621 and a copper part 622, the copper part 622 being connected to the negative terminal adapter 520. The other second plastic part 700 is integrally formed with the aluminum part 621 and the copper part 622 by injection molding, and the second plastic part 700, the aluminum part 621 and the copper part 622 constitute the second coated part. The top cover 100 can be made of aluminum plate or stainless steel plate. The material of the shell is the same as that of the top cover 100, which facilitates the welding connection between the two.

[0058] Furthermore, the battery cover assembly also includes two sealing elements 800, which are respectively fitted onto the positive terminal 610 and the negative terminal 620. The sealing elements 800 can seal the gap between the first mounting hole 102 and the positive terminal 610 / negative terminal 620. The sealing performance of the battery cover assembly is ensured by the setting of the sealing elements 800.

[0059] The top cover 100 is also provided with a third mounting hole 103 for mounting the explosion-proof valve 900. The second plastic part 700 has a vent 215 corresponding to the position of the explosion-proof valve 900. The vent 215 connects the accommodating cavity to the explosion-proof valve 900. When the internal pressure of the battery is too high, the explosion-proof valve 900 opens to release pressure, thereby preventing the battery from exploding. An explosion-proof valve protection plate 910 is also provided on the end face of the top cover 100 opposite to the first plastic part 200. The explosion-proof valve protection plate 910 provides good protection for the explosion-proof valve 900, preventing electrolyte overflow into the third mounting hole 103 and corroding the explosion-proof valve 900, which could lead to unstable opening pressure of the explosion-proof valve 900. It also prevents dust and other contaminants from falling into the third mounting hole 103 and polluting the explosion-proof valve 900.

[0060] This embodiment also provides a battery, including a casing, a cell, and the battery cover assembly described above. By using the battery cover assembly, the intelligent monitoring module 300 can be kept disconnected between the battery electrolyte injection and formation processes, ensuring high battery safety. Furthermore, both the intelligent monitoring module 300 and the power supply switch 400 are integrated into the battery cover assembly, resulting in a simple structure, easy manufacturing, and low cost.

[0061] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery cover assembly, characterized in that, include: Top cover plate (100); A first plastic part (200) is disposed on one side of the top cover plate (100). The first plastic part (200) includes a plastic part body (210), a first buckle plate (220), and a second buckle plate (230). The plastic part body (210) is provided with a first fixing groove (211) and a second fixing groove (212) on the side away from the top cover plate (100). The intelligent monitoring module (300) is disposed in the first fixing slot (211) and encapsulated by the first buckle plate (220); A power supply switch (400) is disposed in the second fixing slot (212) and encapsulated by the second buckle plate (230). The power supply switch (400), the intelligent monitoring module (300) and the battery cell are connected in series.

2. The battery cover assembly according to claim 1, characterized in that, The power supply switch (400) has a first conductive bus (410) and a second conductive bus (420) leading out from its two ends respectively. The intelligent monitoring module (300) has a third conductive bus (310) and a fourth conductive bus (320) leading out from its two ends respectively. The first conductive bus (410) is electrically connected to the positive terminal adapter (510) of the battery cell. The second conductive bus (420) is electrically connected to the third conductive bus (310). The fourth conductive bus (320) is electrically connected to the negative terminal adapter (520) of the battery cell.

3. The battery cover assembly according to claim 2, characterized in that, The first plastic part (200) has a wiring groove (213) on the side away from the top cover plate (100), and the first conductive bus (410), the second conductive bus (420), the third conductive bus (310) and the fourth conductive bus (320) are installed in the wiring groove (213).

4. The battery cover assembly according to claim 1, characterized in that, One of the first buckle plate (220) and the first fixing groove (211) is provided with a first buckle (221), and the other of the first buckle plate (220) and the first fixing groove (211) is provided with a first locking protrusion (2111). The first buckle (221) engages with the first locking protrusion (2111).

5. The battery cover assembly according to claim 1, characterized in that, The bottom wall of the second fixing groove (212) is provided with a limiting part (2122), which abuts against the power supply switch (400).

6. The battery cover assembly according to claim 1, characterized in that, One of the second buckle plate (230) and the second fixing groove (212) is provided with a second buckle (231), and the other of the second buckle plate (230) and the second fixing groove (212) is provided with a second locking protrusion (2121). The second buckle (231) engages with the second locking protrusion (2121).

7. The battery cover assembly according to claim 1, characterized in that, The first buckle plate (220) is provided with a first through hole (222); And / or, the top cover plate (100) is provided with a first injection hole (101), the bottom wall of the second fixing groove (212) is provided with a second injection hole (2123), the second buckle plate (230) is provided with a second through hole (232), and the first injection hole (101), the second injection hole (2123) and the second through hole (232) are connected.

8. The battery cover assembly according to claim 7, characterized in that, The power supply switch (400) is a pressure-sensitive switch. A sealing pin is provided in the first injection hole (101). The sealing pin is pressed against the power supply switch (400) to close the power supply switch (400).

9. The battery cover assembly according to claim 1, characterized in that, The intelligent monitoring module (300) includes a controller and several detection units electrically connected to the controller. The detection units are used to detect at least one of temperature information and air pressure information inside the battery. The detection units send the temperature information and / or the air pressure information to the battery management system via the controller.

10. A battery, characterized in that, Includes the battery cover assembly according to any one of claims 1-9.

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