Top cover assembly of battery cell, battery cell and battery pack

Abstract

The utility model provides a top cover assembly of a battery cell, the battery cell and a battery pack, and the top cover assembly comprises a top cover which is used for being installed on a shell of the battery cell; the flexible circuit board is arranged on the top surface of the top cover, a control assembly is arranged on the flexible circuit board, and the control assembly is used for collecting information of the battery cell; and the reinforcing piece is arranged on the flexible circuit board. In the embodiment of the utility model, the reinforcer is arranged on the flexible circuit board, so that the structural strength of the flexible circuit board can be enhanced, the bending resistance and the deformation resistance of the flexible circuit board are stronger, and the probability of short circuit and breakage of the control assembly on the flexible circuit board caused by external force such as collision or cell expansion is reduced; and the stability of cell information acquisition is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric core, concretely relates to a top cover subassembly of electric core, electric core and battery pack. BACKGROUND

[0002] The electric core data acquisition system in the prior art usually adopts structures such as flexible printed circuit board (FPC) or flexible flat cable (FFC) to acquire data from the electric core or aluminum row, and the thickness is relatively thin, the occupied space is small, and the structure is suitable for being installed in the electric core. However, due to the softness of the structure, the structure is prone to bending deformation due to swinging or slight external force impact, and then the copper foil circuit inside the flexible printed circuit board is prone to short circuit, fracture and the like, thereby affecting the normal use of the data acquisition system. SUMMARY

[0003] Embodiments of the utility model provide a top cover subassembly of electric core, electric core and battery pack, and the technical problem that the installation of the insulating upper cover is relatively complex in the prior art can be improved.

[0004] In a first aspect, embodiments of the utility model provide a top cover subassembly of electric core, and the top cover subassembly comprises:

[0005] A top cover, the top cover is used for being installed to the shell of the electric core;

[0006] A flexible printed circuit board, the flexible printed circuit board is arranged on the top surface of the top cover, a control component is arranged on the flexible printed circuit board, and the control component is used for acquiring information of the electric core; and

[0007] A reinforcing part, the reinforcing part is arranged on the flexible printed circuit board.

[0008] In some embodiments, the top surface of the top cover is provided with an explosion-proof valve, the flexible printed circuit board comprises a avoiding part, and the avoiding part is used for exposing the explosion-proof valve.

[0009] In some embodiments, the flexible printed circuit board comprises a first end and a second end opposite to each other, and the explosion-proof valve is located between the first end and the second end.

[0010] The number of the reinforcing parts is at least two, and the first end and the second end are both provided with the reinforcing parts.

[0011] In some embodiments, the control component comprises an acquisition chip.

[0012] The flexible printed circuit board comprises a first end and a second end opposite to each other, and the explosion-proof valve is located between the first end and the second end.

[0013] The first end has a larger area than the second end, and the collection chip is arranged at the first end.

[0014] In some embodiments, the flexible circuit board further comprises a connecting portion connected between the first end and the second end, and the avoiding portion is connected to the connecting portion.

[0015] In some embodiments, a gap is formed between the first end, the connecting portion and the second end, and the gap forms the avoiding portion.

[0016] In some embodiments, the control assembly further comprises a wireless transmission module electrically connected to the collection chip, and the wireless transmission module is configured to communicate with an external device.

[0017] In some embodiments, the wireless transmission module comprises an antenna and an antenna support, the antenna is electrically connected to the chip, the antenna support is arranged at the same end of the collection chip on the flexible circuit board, and the antenna support is fixedly connected to the antenna.

[0018] In some embodiments, the reinforcing member is plate-shaped, and the thickness of the reinforcing member is H, 0.5mm≤H≤2mm; and / or,

[0019] The reinforcing member comprises an insulating member connected to the flexible circuit board and the top cover respectively, and configured to support the flexible circuit board.

[0020] In some embodiments, the top cover assembly further comprises a conductive member, one end of the conductive member is electrically connected to the control assembly, and the other end of the conductive member is electrically connected to the battery cell.

[0021] In some embodiments, the top cover assembly further comprises a pole, and the pole is arranged on the top cover.

[0022] The conductive member is welded to the pole.

[0023] In some embodiments, the upper surface of the pole is provided with a protrusion, the protrusion is used for welding an aluminum row, the conductive member is welded to the upper surface, and the distance between the conductive member and the protrusion is D, D≤2mm.

[0024] In some embodiments, the conductive member is a nickel sheet; and / or,

[0025] A thermistor is arranged on the conductive member.

[0026] In a second aspect, embodiments of the utility model provide a battery cell, which comprises:

[0027] A shell is provided with a first mounting cavity.

[0028] a core package, the core package being arranged in the first installation cavity; and

[0029] a top cover assembly as described in the foregoing embodiments, the top cover assembly being connected with the shell to close the first installation cavity.

[0030] In a third aspect, the embodiments of the utility model provide a battery pack, comprising:

[0031] a box body;

[0032] an electric core assembly, the electric core assembly being arranged in the box body, the electric core assembly comprising a plurality of electric cores as described in the foregoing embodiments; and

[0033] a bus, the bus being communicatively connected with the control assembly, the bus being used for transmitting information collected by the control assembly to an external device.

[0034] The embodiments of the utility model as described in the foregoing embodiments have the following beneficial effects:

[0035] In the embodiments of the utility model, the flexible circuit board is provided with a reinforcing member, so that the structural strength of the flexible circuit board is enhanced, the bending resistance and deformation resistance of the flexible circuit board are stronger, the probability of short circuit and fracture of the control assembly on the flexible circuit board caused by external force such as collision or expansion of the electric core is reduced, and the stability of electric core information collection is improved. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0037] Figure 1 is a structural schematic view of an electric core provided by the embodiments of the utility model;

[0038] Figure 2 is a structural schematic view of a top cover assembly provided by the embodiments of the utility model;

[0039] Figure 3 is a partial structural schematic view of a top cover assembly provided by the embodiments of the utility model;

[0040] Figure 4 is a partial structural schematic view of a top cover assembly provided by the embodiments of the utility model;

[0041] Figure 5 is a left view of a reinforcing member provided by the embodiments of the utility model;

[0042] Figure 6 is Figure 2 is an enlarged view of A in FIG.

[0043] The reference signs in the drawings are as follows:

[0044] 1, cell; 11, shell;

[0045] 2, top cover assembly;

[0046] 21, top cover; 211, explosion-proof valve;

[0047] 22, flexible circuit board; 221, control assembly; 2211, acquisition chip; 2212, wireless transmission module; 22121, antenna; 22122, antenna support;

[0048] 222, first end; 223, second end; 224, connecting portion; 225, notch; 226, avoiding portion;

[0049] 23, reinforcing member; 231, insulating member;

[0050] 24, conductive member; 241, nickel sheet; 242, thermistor;

[0051] 25, pole; 251, upper surface; 252, protrusion. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower of the device in the actual use or working state, and specifically refer to the direction of the drawing surface in the drawings; and "inner" and "outer" refer to the contour of the device.

[0053] According to the first aspect of the present application, with reference to Figures 1 to 3 The top cover assembly 2 of the cell 1 provided in the embodiments of the present application comprises: a top cover 21, the top cover 21 is used for being mounted to the shell 11 of the cell 1; a flexible circuit board 22, the flexible circuit board 22 is arranged on the top surface of the top cover 21, and a control assembly 221 is arranged on the flexible circuit board 22, the control assembly 221 is used for acquiring information of the cell 1; and a reinforcing member 23, the reinforcing member 23 is arranged on the flexible circuit board 22.

[0054] The flexible circuit board 22 serves as a bearing body of the control component 221, is relatively light and thin, occupies less space, and can reduce the influence of the top cover assembly 2 on the battery capacity. The control component 221 on the flexible circuit board 22 can collect various information of the battery cell 1, such as the voltage and current of the battery cell 1, which can be used to evaluate the working state of the battery cell 1. For example, by monitoring the voltage of the battery cell 1, the charging degree of the battery cell 1 can be known, and by monitoring the current, whether the charging and discharging rate of the battery cell 1 is normal can be determined, so that whether the battery cell 1 has an abnormal condition can be found in time.

[0055] The reinforcing member 23 is used to enhance the structural strength of the flexible circuit board 22, prevent the flexible circuit board 22 from being excessively deformed or even damaged when subjected to external force impact, vibration or due to internal pressure changes of the battery cell 1, thereby ensuring the normal operation of the control component 221 and the stability of the electrical connection with the battery cell 1. The reinforcing member 23 is usually made of high-strength insulating materials, such as polyimide, epoxy resin materials, ceramic materials, etc., which have high mechanical strength and good heat resistance and corrosion resistance, can enhance the flexible circuit board 22 while adapting to the complex working environment inside the battery to ensure the safety of the battery. The shape of the reinforcing member 23 can be set according to actual needs, and is usually adapted to the shape of the flexible circuit board 22 to better connect with the flexible circuit board 22 and disperse stress.

[0056] The reinforcing member 23 and the flexible circuit board 22 can be connected in various ways. For example, the reinforcing member 23 can be pasted on the surface of the flexible circuit board 22 using glue or tape, so that the installation process of the reinforcing member 23 is relatively simple; or the reinforcing member 23 and the flexible circuit board 22 can be fixed by mechanical connection, such as using screws, nuts, buckles, clips and other fasteners, so that the reinforcing member 23 is fixed on the circuit board, and the reinforcing member 23 and the flexible circuit board 22 are detachably connected, which facilitates the adjustment of the position of the reinforcing member 23 to adapt to different installation requirements.

[0057] When the top cover assembly 2 in the embodiment of the utility model is installed on the shell 11 of the battery cell 1, the control component 221 on the flexible circuit board 22 is electrically connected with the battery cell 1 to collect information of the battery cell 1. During the working process of the control component 221, whether it is the stress caused by the volume change of the battery cell 1 during the charging and discharging process or the impact force caused by the external environmental factors such as vibration and shaking of the equipment, all will act on the flexible circuit board 22. At this time, the reinforcing member 23 arranged on the flexible circuit board 22 has high strength and can bear most of the stress and impact force and disperse them everywhere, effectively limiting the deformation amplitude of the flexible circuit board 22 and reducing the probability of damage to the control component 221 on the flexible circuit board 22, thereby ensuring that the control component 221 can continuously and stably collect information of the battery cell 1, and further improving the safety performance of the battery cell 1.

[0058] In the embodiment of the utility model, through setting the reinforcing part 23 on the flexible circuit board 22, the structural stability of the flexible circuit board 22 is significantly improved, the risk of damage of the flexible circuit board 22 and the control assembly 221 due to physical factors is greatly reduced, the occurrence of problems such as inaccurate data acquisition or control failure caused by unstable circuit connection or element damage due to stress is reduced, the accuracy and reliability of the information acquisition of the battery cell 1 are improved, which is beneficial to the monitoring and management of the battery cell 1, provides help for the safe and efficient operation of the battery cell 1 in various application scenarios, and finally improves the stability of the power supply system comprising the top cover assembly 2.

[0059] In an embodiment, referring to Figure 2 The top surface of the top cover 21 is provided with an explosion-proof valve 211, and the flexible circuit board 22 comprises a avoiding part 226 for exposing the explosion-proof valve 211.

[0060] The explosion-proof valve 211 is an important part of the top cover 21, which can be opened in time to release the internal pressure and prevent the battery cell 1 from exploding when the internal pressure of the battery cell 1 rises sharply due to abnormal conditions such as thermal runaway and short circuit. In the embodiment of the utility model, the avoiding part 226 is arranged on the flexible circuit board 22, so that the flexible circuit board 22 and the explosion-proof valve 211 do not interfere with each other, and the explosion-proof valve 211 is prevented from being blocked by the flexible circuit board 22 when it needs to function, thereby improving the safety performance of the top cover assembly 2. In addition, during the process of opening and releasing pressure of the explosion-proof valve 211, high-temperature gas and electrolyte are usually sprayed out, if the flexible circuit board 22 covers the explosion-proof valve 211, the sprayed substances are easy to damage the flexible circuit board 22, and the control assembly 221 on the flexible circuit board 22 is invalid. Therefore, the flexible circuit board 22 exposes the explosion-proof valve 211 through the avoiding part 226, which can reduce the probability of the flexible circuit board 22 being affected by the sprayed substances, and improve the stability of the flexible circuit board 22 and the control assembly 221. For example, the avoiding part 226 can be a through hole covering the explosion-proof valve 211 in the projection area of the top surface of the top cover 21, and the shape and size of the through hole can be set according to actual needs.

[0061] In some embodiments, a through hole is arranged on the flexible circuit board 22, so that the explosion-proof valve 211 can pass through the through hole and be exposed outside the flexible circuit board 22, thereby avoiding mutual influence between the two; or the middle part of the flexible circuit board 22 can be arranged in an elongated strip shape, so that when the flexible circuit board 22 is installed, the strip-shaped flexible circuit board 22 can easily bypass the explosion-proof valve 211.

[0062] In an embodiment, referring to Figure 3The flexible circuit board 22 includes a first end 222 and a second end 223 opposite to each other, and the explosion-proof valve 211 is located between the first end 222 and the second end 223; the number of the reinforcing members 23 is at least two, and the first end 222 and the second end 223 are both provided with the reinforcing members 23.

[0063] The first end 222 and the second end 223 of the flexible circuit board 22 are respectively connected to different parts of the battery cell 1, so that the information of different parts of the battery cell 1 can be collected. Due to the existence of the explosion-proof valve 211, the middle part of the flexible circuit board 22 is usually narrow, and the volume ratio in the whole flexible circuit board 22 is small. Therefore, in the embodiment of the utility model, the reinforcing members 23 are arranged to be at least two and are arranged at both ends of the flexible circuit board 22, which not only ensures that the reinforcing members 23 can play a good reinforcing effect on the flexible circuit board 22, but also effectively reduces the consumption of raw materials, and the reinforcing members 23 in the middle part are omitted, so that the assembly steps of the flexible circuit board 22 and the reinforcing members 23 can be simplified, the installation difficulty of the reinforcing members 23 is reduced, and the production efficiency is improved.

[0064] In an embodiment, referring to Figure 3 The control assembly 221 includes a collection chip 2211, the control assembly 221 includes the collection chip 2211, and the collection chip 2211 is configured to collect the battery cell 1 parameter of the battery cell 1; the flexible circuit board 22 includes a first end 222 and a second end 223 opposite to each other, and the first end 222 and the second end 223 are used to collect the information of different parts of the battery cell 1, and the explosion-proof valve 211 is located between the first end 222 and the second end 223; the area of the first end 222 is greater than the area of the second end 223, and the collection chip 2211 is arranged on the first end 222.

[0065] The collection chip 2211 is used to collect the battery cell 1 parameter of the battery cell 1, and the battery cell 1 parameter can be transmitted to an external device; after the external device receives the battery cell 1 parameter, the battery cell 1 parameter can be transmitted to other external devices or a cloud, and the battery cell 1 parameter is stored and processed by the external devices or the cloud, so that the real-time monitoring and management of the battery cell 1 can be realized. Collecting the battery cell 1 parameter through the cloud big data is helpful to build a diagnostic management system and provide feedback information for maintenance and design.

[0066] Arranging the collection chip 2211 on the first end 222 with a larger area can provide more sufficient space for the collection chip 2211, for example, more reasonable distribution of pins, circuit traces and heat dissipation areas, etc. And sufficient space can better plan the heat dissipation path of the chip, so as to avoid performance degradation or damage of the chip due to heat accumulation.

[0067] In an embodiment, referring to Figure 4The flexible circuit board 22 further comprises a connecting portion 224 connected between the first end 222 and the second end 223, and the avoiding portion 226 is connected to the connecting portion 224. The avoiding portion 226 between the first end 222 and the second end 223 corresponds to the position of the explosion-proof valve 211, so that the avoiding portion 226 is conveniently arranged to reduce the probability of interference of the flexible circuit board 22 on the explosion-proof valve 211.

[0068] In an embodiment, referring to Figure 4 The first end 222, the connecting portion 224 and the second end 223 form a gap 225 towards the explosion-proof valve 211, and the gap 225 forms the avoiding portion 226.

[0069] When the flexible circuit board 22 is installed, the explosion-proof valve 211 can be installed at the gap 225, which can prevent mutual influence between the explosion-proof valve 211 and the flexible circuit board 22, and because the gap 225 is not a closed ring, the first end 222 and the second end 223 of the flexible circuit board 22 can be more flexibly arranged around different parts of the battery cell 1, which is conducive to better collection of information of different positions of the battery cell 1 by the collection chip 2211 and other elements.

[0070] In an embodiment, referring to Figure 3 The control assembly 221 further comprises a wireless transmission module 2212 electrically connected to the collection chip 2211, and the wireless transmission module 2212 is used for communication with external equipment. Through the arrangement of the wireless transmission module 2212, the collection chip 2211 can wirelessly communicate with external equipment, thereby reducing the use of wire harness, reducing the manufacturing cost of subsequent battery pack and the risk of damage to the battery pack caused by wire failure, while avoiding the laying of complex cable lines, greatly simplifying the installation work of the battery.

[0071] In an embodiment, referring to Figure 3 The wireless transmission module 2212 comprises an antenna 22121 and an antenna support 22122, the antenna 22121 is electrically connected to the chip, and the antenna support 22122 and the collection chip 2211 are arranged at the same end of the flexible circuit board 22, and the antenna support 22122 is fixedly connected to the antenna 22121.

[0072] The antenna 22121 is electrically connected with the acquisition chip 2211, and is responsible for transmitting the information of the battery cell 1 processed by the acquisition chip 2211 in the form of a wireless signal. For example, when the acquisition chip 2211 obtains the voltage, temperature and other data of the battery cell 1, the antenna 22121 sends these data to an external device. The antenna support 22122 is arranged on the flexible circuit board 22, and is used for fixing the antenna 22121 to ensure that the antenna 22121 is in a stable position. During the working process of the battery cell 1, the antenna 22121 may be subjected to vibration, shaking and the like, and the antenna support 22122 can prevent the antenna 22121 from being displaced or loosened, so as to ensure that the electrical connection between the antenna 22121 and the acquisition chip 2211 is stable, and the normal signal transmission is maintained. Exemplarily, the antenna support 22122 can be a buckle, a snap ring or the like, and the utility model is not limited in this regard.

[0073] In an embodiment, referring to Figure 5 The reinforcing member 23 is plate-shaped, and the thickness of the reinforcing member 23 is H, 0.5mm≤H≤2mm; and / or the reinforcing member 23 comprises an insulating member 231 connected with the flexible circuit board 22 and the top cover 21 respectively, and used for supporting the flexible circuit board 22.

[0074] It should be noted that, in the embodiments of the present application, the association relationship of the associated objects described by "and / or" can represent three kinds of relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone.

[0075] The plate-shaped reinforcing member 23 is more flat, which facilitates the connection of the flexible circuit board 22 and the top cover 21 together, and reduces the space occupied by the top cover assembly 2. If the thickness H of the reinforcing member 23 is less than 0.5mm, the reinforcing member 23 is too thin, and the effect of improving the strength of the flexible circuit board 22 is not obvious. If the thickness H of the reinforcing member 23 is greater than 2mm, the reinforcing member 23 is too thick, and occupies a large amount of space in the battery, which has a greater negative impact on the volume of the battery. Therefore, in the embodiments of the utility model, the thickness of the reinforcing member 23 is set to be between 0.5mm and 2mm, so that the reinforcing member 23 can strengthen the mechanical strength of the flexible circuit board 22, and will not occupy too much space inside the battery.

[0076] In some embodiments, the insulating member 231 can effectively prevent the flexible circuit board 22 from being electrically connected with the top cover 21, and prevent short circuit caused by accidental contact.

[0077] In an embodiment, referring to Figure 4 The top cover assembly 2 further comprises a conductive member 24, one end of the conductive member 24 is electrically connected with the control assembly 221, and the other end of the conductive member 24 is electrically connected with the battery cell 1.

[0078] The conductive piece 24 can establish reliable electrical connection between the control assembly 221 and the battery cell 1, so as to transmit the electrical signal (such as voltage, current, etc.) of the battery cell 1 to the control assembly 221, so that the control assembly 221 can accurately collect the information of the battery cell 1. The conductive piece 24 generally has good electrical conductivity, which can reduce the loss and interference of the electrical signal in the transmission process. For example, the conductive piece 24 can be a metal sheet or conductive rubber. The shape of the conductive piece 24 can be set according to the actual situation, so as to facilitate the control assembly 221 to collect the information of the battery cell 1. For example, when there is a certain distance or angle difference between the position of the input interface of the control assembly 221 and the battery cell 1, the conductive piece 24 can realize the electrical connection between the two by bending, turning, etc.

[0079] In an embodiment, referring to Figure 2 The top cover assembly 2 further comprises a pole 25, which is arranged on the top cover 21; and the conductive piece 24 is welded to the pole 25.

[0080] The pole 25 serves as a terminal for connecting the battery with an external electrical equipment, and itself plays a role in transmitting current. By connecting the conductive piece 24 with the pole 25, the conductive piece 24 and the control assembly 221 can be connected with the battery cell 1 inside the battery through the pole 25, and the conductive piece 24 does not need to extend into the battery, thereby reducing the influence of the conductive piece 24 on the position and occupied space of each component inside the battery, and preventing the normal use of the battery. The welding connection mode can keep the conductive piece 24 and the pole 25 in close contact and reduce the contact resistance, thereby reducing the probability of disconnection between the conductive piece 24 and the pole 25, and helping to reduce the energy loss in the process of electrical signal transmission and improve the electrical energy transmission efficiency.

[0081] In an embodiment, referring to Figure 6 The upper surface 251 of the pole 25 is provided with a protrusion 252 for welding an aluminum bar, and the conductive piece 24 is welded to the upper surface 251, and the distance between the conductive piece 24 and the protrusion 252 is D, D≤2mm.

[0082] When the battery needs to be applied in a battery pack, each battery needs to be welded with a bus bar, and the bus bar is usually welded on the protrusion 252 of the pole 25. Therefore, in the embodiment of the utility model, the conductive piece 24 is welded at a position outside the protrusion 252, so as to prevent the setting of the conductive piece 24 from affecting the welding between the bus bar and the pole 25.

[0083] In some embodiments, if the distance D between the conductive piece 24 and the protrusion 252 is greater than 2 mm, the contact area between the conductive piece 24 and the pole 25 is small, resulting in large resistance, large current loss and heat, which can reduce the charging and discharging efficiency of the battery and even cause thermal runaway. Therefore, D is set to be within 2 mm, for example, 2 mm, 1.8 mm, 1.6 mm, 1.4 mm, 1.2 mm, 1.0 mm, 0.8 mm, 0.6 mm, 0.4 mm, 0.3 mm, 0.2 mm, 0.1 mm, 0 mm, etc., so that the contact area between the conductive piece 24 and the protrusion 252 is sufficient, and the conductive piece 24 does not affect the welding of the pole 25 and the busbar.

[0084] In an embodiment, referring to Figure 3 , the conductive piece 24 is a nickel sheet 241; and / or,

[0085] The conductive piece 24 is provided with a thermistor 242.

[0086] The welding performance of nickel metal is good, and the conductive piece 24 is set to be a nickel sheet 241, which facilitates the welding between the conductive piece 24 and the battery cell 1. A thermistor 242 is arranged on the conductive piece 24, which can judge the temperature of the battery cell 1 by detecting the change value of the current, so as to monitor the use of the battery cell 1 in real time, and facilitate the staff to find the problem of the battery cell 1 and handle it in time.

[0087] According to a second aspect of the present application, a battery cell 1 is provided, referring to Figure 1 , comprising:

[0088] The shell 11 is provided with a first mounting cavity; the core package is arranged in the first mounting cavity; the top cover assembly 2 in the above-mentioned embodiment is connected with the shell 11 to close the first mounting cavity. Since the battery cell 1 comprises the above-mentioned top cover assembly 2, the battery cell 1 has all the beneficial effects of the above-mentioned top cover assembly 2, and the embodiments of the present application will not be repeated here.

[0089] According to a third aspect of the present application, a battery pack is provided, comprising: a box body; a battery cell 1 assembly arranged in the box body, the battery cell 1 assembly comprising a plurality of battery cells 1 as in the above-mentioned embodiments; a bus bar in communication connection with the control assembly 221, the bus bar being used for transmitting the information collected by the control assembly 221 to an external device. Since the battery pack comprises the above-mentioned battery cell 1, the battery pack has all the beneficial effects of the above-mentioned battery cell 1, and the embodiments of the present application will not be repeated here.

[0090] The above has carried out the detailed introduction to the embodiment of the utility model, the principle and implementation mode of the utility model have been described in this article by applying specific examples, the above embodiment explanation is only for helping understanding the method and its core thought of the utility model; simultaneously, for the technical personnel in the art, according to the thought of the utility model, there will be changes in specific implementation mode and application range, and the above is described, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A top cover assembly of an electric cell, characterized by comprising: The top cover is used for mounting to the shell of the battery cell. The flexible circuit board is arranged on the top surface of the top cover, and a control assembly is arranged on the flexible circuit board, the control assembly being used for collecting information of the battery cell. The reinforcing member is arranged on the flexible circuit board. The top surface of the top cover is provided with an explosion-proof valve, and the flexible circuit board comprises an avoiding portion for exposing the explosion-proof valve. The flexible circuit board comprises a first end and a second end opposite to each other, and the explosion-proof valve is located between the first end and the second end.

2. The roof assembly of claim 1, wherein, The number of the reinforcing members is at least two, and the first end and the second end are both provided with the reinforcing members.

3. The roof assembly of claim 2, wherein, The control assembly comprises a collection chip. The flexible circuit board comprises a first end and a second end opposite to each other, and the explosion-proof valve is located between the first end and the second end.

4. The roof assembly of claim 2, wherein, The area of the first end is greater than that of the second end, and the collection chip is arranged on the first end. The flexible circuit board further comprises a connecting portion connected between the first end and the second end, and the avoiding portion is connected with the connecting portion. A gap is formed between the first end, the connecting portion and the second end, and the gap forms the avoiding portion.

5. The roof assembly of claim 4, wherein, The control assembly further comprises a wireless transmission module electrically connected with the collection chip, and the wireless transmission module is used for communicating with an external device.

6. The roof assembly of claim 5, wherein, The wireless transmission module comprises an antenna and an antenna support, the antenna is electrically connected with the chip, the antenna support is arranged on the same end of the flexible circuit board as the collection chip, and the antenna support is fixedly connected with the antenna.

7. The roof assembly of claim 4, wherein, The reinforcing member is plate-shaped, and the thickness of the reinforcing member is H, 0.5mm≤H≤2mm; and / or 8. The roof assembly of claim 7, wherein, The reinforcing member comprises an insulating member connected with the flexible circuit board and the top cover respectively, and used for supporting the flexible circuit board.

9. The roof assembly of claim 1, wherein, The top cover assembly further comprises a conductive member, one end of the conductive member is electrically connected with the control assembly, and the other end of the conductive member is electrically connected with the battery cell. The top cover assembly further comprises a pole arranged on the top cover.

10. The roof assembly of any one of claims 1 to 9, wherein, The conductive member is welded on the pole.

11. The roof assembly of claim 10, wherein, The upper surface of the pole is provided with a protrusion, the protrusion is used for welding an aluminum row, the conductive member is welded on the upper surface, and the distance between the conductive member and the protrusion is D, D≤2mm. The conductive member is a nickel sheet; and / or 12. The roof assembly of claim 11, wherein, The conductive member is provided with a thermistor.

13. The roof assembly of claim 10, wherein, The shell is provided with a first mounting cavity. The core package is arranged in the first mounting cavity.

14. An electric cell, characterized by The top cover assembly as claimed in any one of claims 1 to 13 is connected with the shell to close the first mounting cavity. The box body; The battery cell assembly is arranged in the box body, and the battery cell assembly comprises a plurality of battery cells as claimed in claim 14. The bus is in communication connection with the control assembly, and the bus is used for transmitting the information collected by the control assembly to an external device. ​ 15. A battery pack, characterized by ​ ​ ​ ​ ​

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