Battery monomer assembly, battery device and power utilization device

Abstract

The utility model discloses a battery monomer assembly, a battery device and a power utilization device, and belongs to the technical field of batteries. The battery monomer assembly comprises a battery unit, a mounting plate, a monitoring cover plate and a temperature measuring assembly. The battery unit comprises one or at least two battery monomers, each battery monomer comprises a shell, an electrode assembly located in the shell and a conductive terminal installed on the shell, the conductive terminals are electrically connected with the electrode assemblies, the arrangement direction of the electrode assemblies and the conductive terminals is the first direction, and the two opposite sides of the battery unit in the first direction are each provided with an installation plate. The monitoring cover plate is mounted between the mounting plates on the two sides, the monitoring cover plate is arranged on at least one side of the battery unit along a second direction crossed with the first direction, the monitoring cover plate and the mounting plates on the two sides define an accommodating cavity for accommodating the battery unit, and the monitoring cover plate is provided with a mounting hole communicated with the accommodating cavity; the temperature measuring assembly is located in the mounting hole and makes contact with the shell. The battery monomer assembly provided by the utility model is beneficial to improving the convenience of installing the temperature measuring assembly.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery cell component, a battery device, and an electrical device. Background Art

[0002] With the development of battery technology, higher requirements are put forward for battery cell components. In related technologies, the installation of the temperature measurement component of the battery cell component is relatively inconvenient. Summary of the Utility Model

[0003] To solve the above technical problems, this application provides a battery cell component, a battery device, and an electrical device to improve the convenience of installing the temperature measurement component.

[0004] This application is implemented through the following technical solutions.

[0005] In the first aspect of the embodiments of this application, a battery cell component is provided, including:

[0006] A battery unit, including one or at least two battery cells. Each battery cell includes a housing, an electrode assembly located inside the housing, and a conductive terminal installed on the housing. The conductive terminal is electrically connected to the electrode assembly, and the arrangement direction of the electrode assembly and the conductive terminal is the first direction;

[0007] Mounting plates are provided on both opposite sides of the battery unit along the first direction;

[0008] A monitoring cover plate is installed between the two mounting plates. The monitoring cover plate is provided on at least one side of the battery unit along a second direction, and the second direction intersects with the first direction. The monitoring cover plate and the two mounting plates surround an accommodation cavity for accommodating the battery unit, and the monitoring cover plate is formed with a mounting hole communicating with the accommodation cavity;

[0009] A temperature measurement component is located in the mounting hole, and the temperature measurement component is in contact with the housing.

[0010] In the embodiments of this application, the monitoring cover plate is provided on at least one side of the battery unit along the second direction, and the monitoring cover plate is formed with a mounting hole communicating with the accommodation cavity, so that the mounting hole can penetrate the monitoring cover plate along the second direction intersecting with the first direction and communicate with the accommodation cavity. The temperature measurement component is arranged in the mounting hole and is in contact with the housing of the battery cell, so that the temperature measurement component can be arranged on the surfaces of the housing of the battery cell that are oppositely arranged along the second direction, and then the temperature measurement component avoids the conductive terminal, so that the battery cell component has a large space for arranging the temperature measurement component to improve the convenience of installing the temperature measurement component.

[0011] In one embodiment, the battery cell component further includes a signal line, and the temperature measurement component includes:

[0012] A temperature detector, electrically connected to the signal wire;

[0013] Thermal conductive adhesive, adhesively bonded to the temperature detector and the housing respectively;

[0014] A wire presser, connected to the housing, and the signal wire is partially located between the wire presser and the housing.

[0015] In the embodiment of the present application, the temperature detector is electrically connected to the signal wire, and the thermal conductive adhesive is adhesively bonded to the temperature detector and the housing respectively, so that the temperature detector can be relatively firmly installed on the surface of the housing, and the temperature data of the battery cell measured by the temperature detector is transmitted through the signal wire. The wire presser is connected to the housing, and the signal wire is partially located between the wire presser and the housing, so that the signal wire can be relatively firmly fixed on the surface of the housing, so as to reduce the possibility that the temperature detector tilts due to the loosening of the signal wire before the thermal conductive adhesive cures, resulting in poor adhesion, and then reducing the temperature measurement accuracy of the temperature detector.

[0016] In one embodiment, the wire presser surrounds the temperature detector, the shape of the wire presser is annular, the wire presser encloses a filling cavity for accommodating the temperature detector, and the thermal conductive adhesive is filled in the filling cavity.

[0017] In the embodiment of the present application, the thermal conductive adhesive is filled in the filling cavity, so that the thermal conductive adhesive can be filled more evenly in the filling cavity, which is beneficial to the heat of the housing of the battery cell to be transferred to the temperature detector more evenly through the thermal conductive adhesive, and then beneficial to improving the temperature measurement accuracy of the temperature detector.

[0018] In one embodiment, the temperature detector in the filling cavity is arranged at an interval from the housing, and the temperature detector is located in the thermal conductive adhesive.

[0019] In the embodiment of the present application, the temperature detector in the filling cavity is arranged at an interval from the housing, and the temperature detector is located in the thermal conductive adhesive. On the one hand, it enables the thermal conductive adhesive to fill the gap between the temperature detector and the housing, and the heat of the battery cell is transferred to the temperature detector through the thermal conductive adhesive, which is beneficial to increasing the temperature measurement area of the temperature detector, and then beneficial to improving the temperature measurement accuracy of the temperature detector; on the other hand, the temperature detector is in the thermal conductive adhesive, and the whole temperature detector is covered by the thermal conductive adhesive, which is beneficial to the thermal conductive adhesive to transfer heat evenly to the temperature detector, and then beneficial to improving the temperature measurement accuracy of the temperature detector.

[0020] In one embodiment, at least a part of the temperature detector on the side facing away from the housing is exposed from the thermal conductive adhesive.

[0021] In the embodiment of the present application, at least a part of the temperature detector on the side facing away from the housing is exposed from the thermal conductive adhesive, which is beneficial to reducing the amount of the thermal conductive adhesive under the condition that the thermal conductive adhesive can transfer heat to the temperature detector relatively evenly.

[0022] In one embodiment, the battery cell is cylindrical in shape, the length direction of the thermometer in the filling cavity is arranged along the axial direction of the battery cell, the cross-section of the thermometer is circular in shape, the diameter of the cross-section of the thermometer first increases and then decreases along the length direction of the thermometer, and the signal line is electrically connected to one end of the thermometer in the length direction.

[0023] In the embodiment of the present application, the shape of the battery cell is cylindrical, and the length direction of the thermometer in the filling cavity is arranged along the axial direction of the battery cell, which is conducive to the thermometer to more accurately measure the temperature of the outer shell of the battery cell. The cross-section of the thermometer is circular, and the diameter of the cross-section of the thermometer increases first and then decreases along the length direction of the thermometer, so that the diameter of the thermometer at both ends along the length direction is smaller and the diameter in the middle is larger, so that the shape of the thermometer is roughly rugby-shaped. In the process of installing the thermometer in the mounting hole, even if there is a certain deviation in the thermometer, the structure of the thermometer with small ends and large middle can better guide the thermometer into the mounting hole. The signal line is electrically connected to one end of the thermometer in the length direction, which facilitates the assembly of the signal line and the thermometer in the battery cell assembly.

[0024] In one embodiment, the wire presser comprises:

[0025] A mounting adhesive bonded to the housing;

[0026] The wire pressing body is bonded to the side of the mounting adhesive facing away from the housing.

[0027] In the embodiment of the present application, the wire pressing body is quickly bonded to the outer shell of the battery cell by means of an installation glue that requires basically no curing time, so that the signal line can be fixed to the surface of the outer shell more firmly and quickly, thereby reducing the possibility that the signal line loosens before the thermal conductive glue cures, causing the thermometer to tilt up, resulting in loose bonding, and subsequently reducing the temperature measurement accuracy of the thermometer.

[0028] In one embodiment, the mounting adhesive is double-sided adhesive.

[0029] In the embodiment of the present application, the two opposite sides of the double-sided tape have bonding functions and basically have no curing time, so that the wire pressing body can be quickly bonded to the outer shell of the battery cell so that the signal line can be fixed on the surface of the outer shell more firmly and quickly, thereby reducing the possibility that the signal line loosens before the thermal conductive adhesive is cured, causing the thermometer to tilt up, resulting in loose bonding, and then reducing the temperature measurement accuracy of the thermometer.

[0030] In one embodiment, the wire pressing body is foam.

[0031] In the embodiments of the present application, the foam has a small density and certain elasticity. When the foam is bonded to the outer shell and presses the signal line, on the one hand, it is beneficial to reduce the weight of the battery cell assembly, and on the other hand, it can apply a large frictional force to the signal line to firmly fix the signal line to the outer shell of the battery cell.

[0032] In one embodiment, the monitoring cover plate is an injection molded part. One side of the monitoring cover plate facing away from the battery unit has a wire groove communicated with the mounting hole. The signal line is arranged across the wire groove and the mounting hole. The hole wall of the mounting hole is arc-shaped. The groove wall of the wire groove includes a first wall, a second wall and a third wall corresponding to each mounting hole. The first wall and the second wall are arranged in parallel. The third wall is respectively connected to one end of the hole wall of the mounting hole along the circumference and the first wall. The third wall and the first wall are arranged crosswise. The second wall is connected to the other end of the hole wall of the mounting hole along the circumference.

[0033] In the embodiments of the present application, the third wall and the first wall are arranged crosswise, so that during the injection molding process of the monitoring cover plate, the pressure of the injection liquid flowing through the positions where the first wall and the third wall are located is relatively large, which is beneficial to the injection liquid solidifying and forming at the positions where the first wall and the third wall are located, so as to reduce the possibility of shrinkage cavities and porosity in the injection molding process of the monitoring cover plate.

[0034] In one embodiment, the shape of the outer shell of the battery cell is cylindrical. The conductive terminal is installed at one end of the axis of the outer shell. The temperature measuring component is in contact with the cylindrical surface of the outer shell.

[0035] In the embodiments of the present application, the cylindrical surface of the outer shell is the side surface with a larger area of the outer shell. When the battery cell generates heat, the cylindrical surface of the outer shell with a larger area has more heat than other surfaces of the outer shell. The temperature measuring component is in contact with the cylindrical surface of the outer shell, which is beneficial to improving the accuracy of temperature measurement of the temperature measuring component.

[0036] In one embodiment, the number of the temperature measuring components is at least two. At least two temperature measuring components are arranged at intervals along the length direction of the mounting plate. The length direction of the mounting plate is respectively arranged crosswise with the first direction and the second direction;

[0037] At least one of the temperature measuring components is located at one end of the battery unit along the length direction of the mounting plate;

[0038] When projected along the second direction, the center line of the projection area of the monitoring cover plate along the length direction of the mounting plate is a preset center line. The distance between at least one temperature measuring component and the preset center line is less than 50 mm.

[0039] In the embodiments of the present application, at least two temperature measurement components are arranged at intervals along the length direction of the mounting plate. At least one temperature measurement component is located at one end of the battery unit along the length direction of the mounting plate. The distance between at least one temperature measurement component and the preset center line is less than 50 mm, so that a plurality of temperature measurement components are respectively arranged at both ends and the middle position of the battery unit along the length direction of the mounting plate, expanding the range for the temperature measurement components to measure the temperature of the battery unit, and being beneficial to improving the accuracy of the temperature measurement components in measuring the temperature of the battery unit.

[0040] In one embodiment, the monitoring cover plate includes a cover plate body, and the cover plate body has a first groove and a partition boss. The first groove and the partition boss are located on the side of the cover plate body facing the battery unit. The first groove and the partition boss are arranged alternately in sequence. The directions in which the first groove and the partition boss are arranged in sequence intersect with the first direction and the second direction respectively. The battery cell is partially located in the first groove. The side of the partition boss facing away from the battery unit has a second groove.

[0041] In the embodiments of the present application, the first groove and the partition boss are arranged alternately in sequence, so that the cover plate body is substantially curved, and the battery cell is partially located in the first groove, which is beneficial to increasing the contact area between the cover plate body and the battery cell, and then beneficial to improving the limiting ability of the cover plate body to the battery cell along the direction in which the first groove and the partition boss are arranged alternately in sequence, and beneficial to improving the stability of the battery cell in the battery cell assembly. The side of the partition boss facing away from the battery unit has a second groove, which is beneficial to reducing the weight of the cover plate body.

[0042] In one embodiment, the monitoring cover plate further includes:

[0043] A first reinforcing rib, which is arranged on the side of the cover plate body facing away from the battery unit. The length direction of the first reinforcing rib is arranged along the extending direction of the second groove. The first reinforcing rib is located in the second groove, and the first reinforcing ribs are arranged at intervals along the length direction of the mounting plate;

[0044] A second reinforcing rib, which is arranged on the side of the cover plate body facing away from the battery unit. The second reinforcing rib extends from one end of the cover plate body to the other end along the length direction of the mounting plate, and the second reinforcing ribs are arranged at intervals along the first direction.

[0045] In the embodiments of the present application, both the first reinforcing rib and the second reinforcing rib are arranged on the side of the cover plate body facing away from the battery unit and the first reinforcing rib and the second reinforcing rib are arranged crosswise. On the one hand, the first reinforcing rib and the second reinforcing rib do not occupy the space between the cover plate body and the battery unit, facilitating the battery cell assembly to be arranged more closely; on the other hand, it is beneficial to improving the bending resistance of the monitoring cover plate, and then beneficial to improving the overall strength of the battery cell assembly.

[0046] In one embodiment, the battery cell further includes an explosion-proof valve, and the explosion-proof valve is disposed on the surface of the housing where the conductive terminal is located.

[0047] In the embodiment of the present application, the explosion-proof valve is disposed on the surface of the housing where the conductive terminal is located. When the pressure inside the battery cell is too high, the explosion-proof valve can be opened to release the pressure inside the battery cell, which is beneficial to improving the safety of the battery cell, and then beneficial to improving the safety of the battery cell assembly.

[0048] In the second aspect of the embodiment of the present application, a battery device is provided, including:

[0049] A box body;

[0050] The battery cell assembly according to any one of the foregoing embodiments, and the battery cell assembly is disposed inside the box body.

[0051] In the third aspect of the embodiment of the present application, an electrical device is provided, including:

[0052] The battery device according to the foregoing embodiment;

[0053] An electrical main body, the battery device is disposed on the electrical main body, and the battery device supplies power to the electrical main body.

[0054] Utility model effect

[0055] In the battery cell assembly of the embodiment of the present application, monitoring covers are disposed on at least one side of the battery unit along the second direction. The monitoring covers are formed with mounting holes communicating with the accommodation cavity, so that the mounting holes can penetrate the monitoring covers along the second direction intersecting with the first direction and communicate with the accommodation cavity. The temperature measuring assembly is disposed in the mounting holes and contacts the housing of the battery cell, so that the temperature measuring assembly can be disposed on the surfaces of the housing of the battery cell oppositely arranged along the second direction, and then the temperature measuring assembly avoids the conductive terminals, so that the battery cell assembly has a large space for arranging the temperature measuring assembly to improve the convenience of installing the temperature measuring assembly. Description of the drawings

[0056] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0057] Figure 1 It is a schematic structural diagram of a battery cell assembly in an embodiment of the present application;

[0058] Figure 2 Is Figure 1Schematic enlarged view of the structure at A in [the figure];

[0059] Figure 3 is Figure 1 Schematic view of the structure of the cross-section along B-B in [the figure];

[0060] Figure 4 Schematic view of the structure of a battery cell assembly in an embodiment of the present application, with the monitoring cover plate not shown in the figure.

[0061] Explanation of reference numerals

[0062] 1. Battery unit; 11. Battery cell; 2. Mounting plate; 3. Monitoring cover plate; 31. Mounting hole; 32. Wiring groove; 321. First wall; 322. Second wall; 323. Third wall; 33. Cover plate body; 331. First groove; 332. Partition boss; 333. Second groove; 34. First reinforcing rib; 35. Second reinforcing rib; a. Accommodating cavity; 4. Temperature measuring assembly; 41. Temperature measurer; 42. Wire presser; 42a. Filling cavity; 421. Wire pressing body; 5. Signal wire; 6. Preset center line. Detailed implementation manners

[0063] Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, and thus are only examples and cannot be used to limit the protection scope of the present application.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0065] In the description of the embodiments of this application, technical terms such as "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality" means more than two, unless otherwise specifically defined.

[0066] Referring to "embodiments" herein means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0067] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0068] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0069] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0070] In the related art, the temperature measuring component of the battery cell assembly is used to measure the temperature of the outer shell of the battery cell. Since the conductive terminal is arranged at one end of the outer shell of the battery cell along the first direction, the conductive terminal occupies a certain space. When the temperature measuring component is arranged at one end of the outer shell along the first direction facing the conductive terminal, the temperature measuring component and the conductive terminal are at the same end of the outer shell, which makes the installation space of the temperature measuring component more crowded and inconvenient to install.

[0071] If the temperature measuring component can be arranged on the remaining surface of the battery cell shell, avoiding the conductive terminal, the convenience of installing the temperature measuring component can be effectively improved. The temperature measuring component of the embodiment of the present application is arranged in the mounting hole of the monitoring cover plate, and the mounting hole can be connected to the accommodating cavity along the second direction arranged crosswise with the first direction, so that the temperature measuring component can be arranged on the surface of the battery cell shell arranged oppositely along the second direction, avoiding the conductive terminal, and having a larger space to arrange the temperature measuring component, so as to improve the convenience of installing the temperature measuring component.

[0072] The solutions of the embodiments of the present application may be applied to, but are not limited to, a battery cell assembly, a battery device including a plurality of battery cell assemblies, and an electrical device including the battery device.

[0073] The embodiment of the present application provides an electric device, including a battery device and an electric main body. The battery device is arranged on the electric main body, and the battery device provides power to the electric main body.

[0074] The electrical device may include, but is not limited to, mobile phones, tablets, laptop computers, electric toys, power tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric aircraft toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spaceship, etc.

[0075] In the following embodiments, for the convenience of description, the electrical device in an embodiment of the present application is taken as an example of a vehicle for illustration. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A battery device is disposed inside the vehicle, and the battery device may be disposed at the bottom, head, or tail of the vehicle. The battery device can be used for power supply of the vehicle. For example, the battery device can be used as the operating power source of the vehicle. The vehicle may include an electrical main body, and the electrical main body includes a controller and a motor. The controller is used to control the battery device to supply power to the motor. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle.

[0076] In an embodiment of the present application, the battery device can not only be used as the operating power source of the vehicle, but also be used as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0077] An embodiment of the present application provides a battery device, which includes a box body and a battery cell assembly, and the battery cell assembly is disposed inside the box body.

[0078] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells 11, and the plurality of battery cells 11 are connected in series, parallel, or in a hybrid connection through a busbar component.

[0079] The battery cell 11 includes a housing and an electrode assembly. The electrode assembly includes positive and negative electrode plates and a separator membrane. The housing may be a sealed structure or a non-sealed structure. As an example, the housing is a non-sealed structure, and the housing serves to protect the electrode assembly. The battery cell 11 further includes a sealed bag, and the sealed bag is located between the housing and the electrode assembly. The sealed bag is used to encapsulate the electrode assembly. Specifically, the sealed bag may be a bag-shaped insulating member or an aluminum-plastic film.

[0080] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells 11; as an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells 11 to form an independent module. As an example, the battery module may be formed by tying a plurality of battery cells 11 with a cable tie.

[0081] In some embodiments, the battery device may be a battery pack, which includes a box body and one or more battery cell assemblies accommodated in the box body.

[0082] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body by fixing the battery module in the box body.

[0083] As an example, the battery cell assembly may also be accommodated in the box body by directly fixing a plurality of battery cells 11 in series, in parallel or in a series-parallel combination in the box body.

[0084] As an example, the box body may include a first box body and a second box body. The first box body and the second box body are buckled so that a closed space is formed inside the box body to accommodate the battery cell assembly. Here, "closed" means covered or closed, which may be sealed or non-sealed. The first box body may be a top cover or a bottom plate.

[0085] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0086] As an example, the box body may be part of the chassis structure of a vehicle. For example, the top cover of the box body may become at least part of the floor of the vehicle, or the frame of the box body may become at least part of the cross beam and longitudinal beam of the vehicle.

[0087] In some embodiments, the battery device may be an energy storage device, which includes a box body, and a door is provided on at least one side of the box body. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0088] For the battery cell assembly in the embodiments of the present application, please refer to Figures 1 to 4 , the battery cell assembly includes a battery unit 1, a mounting plate 2, a monitoring cover plate 3 and a temperature measuring component 4. The battery unit 1 includes one or at least two battery cells 11. Each battery cell 11 includes a housing, an electrode assembly located inside the housing, and a conductive terminal mounted on the housing. The conductive terminal is electrically connected to the electrode assembly. The arrangement direction of the electrode assembly and the conductive terminal is the first direction. Mounting plates 2 are provided on opposite sides of the battery unit 1 along the first direction. The monitoring cover plate 3 is mounted between the two mounting plates 2 on both sides. The monitoring cover plate 3 is provided on at least one side of the battery unit 1 along a second direction, and the second direction is arranged crosswise with the first direction. The monitoring cover plate 3 and the two mounting plates 2 on both sides enclose an accommodation cavity a for accommodating the battery unit 1. The monitoring cover plate 3 is formed with a mounting hole 31 communicating with the accommodation cavity a, and the temperature measuring component 4 is located in the mounting hole 31 and contacts the housing.

[0089] Exemplarily, please refer to Figure 3 , the shape of the battery cell 11 is cylindrical.

[0090] Exemplarily, please refer to Figure 3 , the battery cell 1 includes three rows of cylindrical battery monomers 11, at least two rows of battery monomers 11 are arranged along the second direction, and at least two battery monomers 11 in each row are arranged along a direction intersecting both the first direction and the second direction.

[0091] Exemplarily, the conductive terminal can be the pole column of the battery monomer 11.

[0092] Exemplarily, a monitoring cover plate 3 is provided on one side of the battery cell 1 along the second direction, and the cover plate on the other side of the battery cell 1 opposite to the second direction can be the monitoring cover plate 3 or an ordinary cover plate.

[0093] Exemplarily, the mounting plate 2 can be a honeycomb plate with a certain thickness.

[0094] Exemplarily, the material of the mounting plate 2 is not limited, for example, it can be plastic or metal.

[0095] Exemplarily, the material of the monitoring cover plate 3 is not limited, for example, it can be plastic or metal.

[0096] Exemplarily, Figure 1 and Figure 4 the direction shown by R1 in Figure 3 is the first direction, and the direction shown by R2 in

[0097] Exemplarily, the first direction and the second direction are perpendicularly arranged.

[0098] The temperature measuring component 4 is a component used to measure the temperature of the outer shell of the battery monomer 11. For example, the temperature measuring component 4 can monitor the temperature of the outer shell of the battery monomer 11 in real time.

[0099] In the embodiment of the present application, a monitoring cover plate 3 is provided on at least one side of the battery cell 1 along the second direction. The monitoring cover plate 3 is formed with a mounting hole 31 communicating with the accommodation cavity a, so that the mounting hole 31 can penetrate the monitoring cover plate 3 along the second direction intersecting the first direction and communicate with the accommodation cavity a. The temperature measuring component 4 is arranged in the mounting hole 31 and contacts the outer shell of the battery monomer 11, so that the temperature measuring component 4 can be arranged on the surfaces of the outer shell of the battery monomer 11 arranged oppositely along the second direction, and then the temperature measuring component 4 avoids the conductive terminal, so that the battery monomer assembly has a large space for arranging the temperature measuring component 4 to improve the convenience of installing the temperature measuring component 4.

[0100] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 4, the battery cell assembly further includes a signal line 5, and the temperature measuring component 4 includes a temperature detector 41, a thermal conductive adhesive, and a wire presser 42. The temperature detector 41 is electrically connected to the signal line 5. The thermal conductive adhesive is bonded to the temperature detector 41 and the housing respectively. The wire presser 42 is connected to the housing, and a part of the signal line 5 is located between the wire presser 42 and the housing.

[0101] It should be noted that the thermal conductive adhesive is initially in a gel state, not a liquid that can flow completely, and can be cured and formed after a certain period of time.

[0102] In the embodiment of the present application, the temperature detector 41 is electrically connected to the signal line 5, and the thermal conductive adhesive is bonded to the temperature detector 41 and the housing respectively, so that the temperature detector 41 can be relatively firmly installed on the surface of the housing. The temperature data of the battery cell 11 measured by the temperature detector 41 is transmitted through the signal line 5. The wire presser 42 is connected to the housing, and a part of the signal line 5 is located between the wire presser 42 and the housing, so that the signal line 5 can be relatively firmly fixed on the surface of the housing, so as to reduce the possibility that the temperature detector 41 tilts due to the loosening of the signal line 5 before the thermal conductive adhesive is cured, resulting in poor bonding and then reducing the temperature measurement accuracy of the temperature detector 41.

[0103] It can be understood that the temperature measuring component 4 may not include the wire presser 42. Exemplarily, the temperature measuring component 4 includes a temperature detector 41 and a thermal conductive adhesive. The temperature detector 41 is electrically connected to the signal line 5, the thermal conductive adhesive is bonded to the temperature detector 41 and the housing respectively, and the thermal conductive adhesive is bonded to the signal line 5 and the housing respectively.

[0104] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 4 , the wire presser 42 surrounds the temperature detector 41, the shape of the wire presser 42 is annular, and the wire presser 42 encloses a filling cavity 42a for accommodating the temperature detector 41, and the thermal conductive adhesive is filled in the filling cavity 42a.

[0105] In the embodiment of the present application, the thermal conductive adhesive is filled in the filling cavity 42a, so that the thermal conductive adhesive can be filled more evenly in the filling cavity 42a, which is beneficial to the heat of the housing of the battery cell 11 being transferred to the temperature detector 41 more evenly through the thermal conductive adhesive, and then beneficial to improving the temperature measurement accuracy of the temperature detector 41.

[0106] It can be understood that the shape of the wire presser 42 is not limited. Exemplarily, the shape of the wire presser 42 can also be square.

[0107] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 4 , the temperature detector 41 in the filling cavity 42a is arranged at intervals with the housing, and the temperature detector 41 is located in the thermal conductive adhesive.

[0108] Exemplarily, the shape of the battery cell 11 is cylindrical. The temperature detector 41 in the filling cavity 42a is arranged at an interval from the outer shell. The temperature detector 41 is located in the thermal conductive adhesive, so that the thermal conductive adhesive can fill the gap between the temperature detector 41 and the outer shell.

[0109] In the embodiment of the present application, the temperature detector 41 in the filling cavity 42a is arranged at an interval from the outer shell. The temperature detector 41 is located in the thermal conductive adhesive. On the one hand, the thermal conductive adhesive can fill the gap existing between the temperature detector 41 and the outer shell, and the heat of the battery cell 11 is transferred to the temperature detector 41 through the thermal conductive adhesive, which is beneficial to increasing the temperature measurement area of the temperature detector 41, and then beneficial to improving the temperature measurement accuracy of the temperature detector 41. On the other hand, the temperature detector 41 is in the thermal conductive adhesive, and the whole temperature detector 41 is covered by the thermal conductive adhesive, which is beneficial to the uniform heat transfer of the thermal conductive adhesive to the temperature detector 41, and then beneficial to improving the temperature measurement accuracy of the temperature detector 41.

[0110] It can be understood that the arrangement relationship between the temperature detector 41 and the outer shell may not be limited. Exemplarily, the temperature detector 41 may be in contact with the outer shell of the battery cell 11.

[0111] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 4 , at least one side of the temperature detector 41 facing away from the outer shell is partially exposed from the thermal conductive adhesive.

[0112] In the embodiment of the present application, at least one side of the temperature detector 41 facing away from the outer shell is partially exposed from the thermal conductive adhesive. Under the condition that the thermal conductive adhesive can transfer heat to the temperature detector 41 relatively uniformly, it is beneficial to reduce the amount of the thermal conductive adhesive used.

[0113] In one embodiment, please refer to Figures 1 to 4 , the shape of the battery cell 11 is cylindrical. The length direction of the temperature detector 41 in the filling cavity 42a is arranged along the axial direction of the battery cell 11. The cross-sectional shape of the temperature detector 41 is circular. The diameter of the cross-section of the temperature detector 41 first increases and then decreases along the length direction of the temperature detector 41. The signal line 5 is electrically connected to one end of the temperature detector 41 in the length direction.

[0114] In the embodiment of the present application, the battery cell 11 is cylindrical in shape, and the length direction of the thermometer 41 in the filling cavity 42a is arranged along the axial direction of the battery cell 11, which is conducive to the thermometer 41 to more accurately measure the temperature of the outer shell of the battery cell 11. The cross-section of the thermometer 41 is circular in shape, and the diameter of the cross-section of the thermometer 41 increases first and then decreases along the length direction of the thermometer 41, so that the diameter of the thermometer 41 at both ends along the length direction is small, and the diameter in the middle is large, so that the shape of the thermometer 41 is roughly rugby-shaped. In the process of installing the thermometer 41 in the mounting hole 31, even if there is a certain deviation in the thermometer 41, the structure of the thermometer 41 with small ends and large middle can better guide the thermometer 41 into the mounting hole 31. The signal line 5 is electrically connected to one end of the thermometer 41 in the length direction, which facilitates the assembly of the signal line 5 and the thermometer 41 in the battery cell assembly.

[0115] It is understandable that there is no limitation on the shape of the battery cell 11 and the shape of the temperature detector 41. For example, the shape of the battery cell 11 may be square, and the shape of the temperature detector 41 may also be square.

[0116] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 4 The wire crimping device 42 includes a mounting adhesive and a wire crimping body 421 , the mounting adhesive is bonded to the housing, and the wire crimping body 421 is bonded to a side of the mounting adhesive facing away from the housing.

[0117] It needs to be explained that the installation glue is different from the thermal conductive glue. The thermal conductive glue needs a certain amount of time to solidify and cure, while the installation glue almost does not need time to cure and can be bonded.

[0118] Exemplarily, the installation glue may be solid glue, which can quickly bond the wire pressing body 421 to the housing with substantially no curing time.

[0119] In the embodiment of the present application, the wire pressing body 421 is quickly bonded to the outer shell of the battery cell 11 by means of an installation glue that requires basically no curing time, so that the signal line 5 can be fixed to the surface of the outer shell more firmly and quickly, thereby reducing the possibility that the signal line 5 loosens before the thermal conductive glue is cured, causing the temperature sensor 41 to tilt, resulting in loose bonding, and then reducing the temperature measurement accuracy of the temperature sensor 41.

[0120] In one embodiment, the mounting adhesive is a double-sided adhesive.

[0121] In the embodiments of the present application, both opposite sides of the double-sided tape have an adhesive function and basically no curing time, enabling the wire pressing body 421 to be quickly adhered to the outer shell of the battery cell 11, so that the signal wire 5 can be relatively firmly and quickly fixed on the surface of the outer shell, reducing the possibility that the temperature detector 41 tilts due to the loosening of the signal wire 5 before the thermal conductive adhesive cures, resulting in poor adhesion and then reducing the temperature measurement accuracy of the temperature detector 41.

[0122] In one embodiment, the wire pressing body 421 is a foam.

[0123] In the embodiments of the present application, the foam has a small density and certain elasticity. When the foam is adhered to the outer shell and presses the signal wire 5, on the one hand, it is beneficial to reduce the weight of the battery cell assembly, and on the other hand, it can exert a large frictional force on the signal wire 5 to relatively firmly fix the signal wire 5 to the outer shell of the battery cell 11.

[0124] It can be understood that the material of the wire pressing body 421 is not limited. Exemplarily, the material of the wire pressing body 421 can also be rubber.

[0125] In one embodiment, please refer to Figure 1 and Figure 2 , the monitoring cover plate 3 is an injection molded part. One side of the monitoring cover plate 3 facing away from the battery unit 1 has a wire groove 32 communicating with the mounting hole 31. The signal wire 5 straddles the wire groove 32 and the mounting hole 31. The hole wall of the mounting hole 31 is arc-shaped. The groove wall of the wire groove 32 includes a first wall 321, a second wall 322, and a third wall 323 corresponding to each mounting hole 31. The first wall 321 and the second wall 322 are arranged in parallel. The third wall 323 is respectively connected to one end of the hole wall of the mounting hole 31 along the circumference and the first wall 321. The third wall 323 is arranged crosswise with the first wall 321. The second wall 322 is connected to the other end of the hole wall of the mounting hole 31 along the circumference.

[0126] Exemplarily, please refer to Figure 1 and Figure 2 , the third wall 323 is arranged perpendicular to the first wall 321.

[0127] Exemplarily, please refer to Figure 1 and Figure 2 , the first wall 321 and the second wall 322 are parallel and flush, and both the first wall 321 and the second wall 322 are arranged along the length direction of the mounting plate 2.

[0128] In the embodiments of the present application, the third wall 323 is arranged crosswise with the first wall 321, so that during the injection molding process of the monitoring cover plate 3, the pressure of the injection liquid flowing through the positions of the first wall 321 and the third wall 323 is relatively large, which is beneficial to the injection liquid curing and forming at the positions of the first wall 321 and the third wall 323, reducing the possibility of shrinkage holes and shrinkage porosity in the monitoring cover plate 3 during the injection molding process.

[0129] In one embodiment, please refer to Figures 1 to 4 , the shape of the outer shell of the battery cell 11 is cylindrical, the conductive terminal is installed at one end of the axis of the outer shell, and the temperature measuring component 4 is in contact with the cylindrical surface of the outer shell.

[0130] In the embodiment of the present application, the cylindrical surface of the outer shell is the side surface with a larger area of the outer shell. When the battery cell 11 generates heat, the cylindrical surface of the outer shell with a larger area has more heat relative to the surfaces of other outer shells. The temperature measuring component 4 is in contact with the cylindrical surface of the outer shell, which is beneficial to improving the accuracy of the temperature measurement of the temperature measuring component 4.

[0131] In one embodiment, please refer to Figure 1 and Figure 4 , the number of the temperature measuring components 4 is at least two, at least two temperature measuring components 4 are arranged at intervals along the length direction of the mounting plate 2, the length direction of the mounting plate 2 is respectively arranged in a cross manner with the first direction and the second direction, at least one temperature measuring component 4 is located at one end of the battery unit 1 along the length direction of the mounting plate 2, and when projected along the second direction, the projection area of the monitoring cover plate 3 along the center line of the length direction of the mounting plate 2 is the preset center line 6, and the distance between at least one temperature measuring component 4 and the preset center line 6 is less than 50 mm.

[0132] Exemplarily, the distance between the temperature measuring component 4 and the preset center line 6 can be measured with a vernier caliper.

[0133] Exemplarily, Figure 1 , Figure 3 and Figure 4 the direction shown by R3 in

[0134] is the length direction of the mounting plate 2.

[0135] Exemplarily, the length direction of the mounting plate 2 is respectively arranged perpendicular to the first direction and the second direction. Figure 4 Exemplarily, please refer to

[0136] Figure 4 , the number of the temperature measuring components 4 is three, three temperature measuring components 4 are arranged at intervals along the length direction of the mounting plate 2, two of the temperature measuring components 4 are respectively located at both ends of the battery unit 1 along the length direction of the mounting plate 2, and the other temperature measuring component 4 is located at the middle position of the battery unit 1 along the length direction of the mounting plate 2.

[0137] Figure 4 It should be noted that, please refer to Figure 4, the center line of the projection area of the monitoring cover plate 3 along the length direction of the mounting plate 2 is the preset center line 6, which means that the distances between the preset center line 6 and the two extreme positions along the length direction of the projection area of the monitoring cover plate 3 along the second direction are equal.

[0138] In the embodiment of the present application, at least two temperature measuring components 4 are arranged at intervals along the length direction of the mounting plate 2. At least one temperature measuring component 4 is located at one end of the battery unit 1 along the length direction of the mounting plate 2. The distance between at least one temperature measuring component 4 and the preset center line 6 is less than 50 mm, so that a plurality of temperature measuring components 4 are respectively arranged at both ends and the middle position of the battery unit 1 along the length direction of the mounting plate 2, expanding the range of the temperature measuring component 4 for measuring the temperature of the battery unit 1, which is beneficial to improving the accuracy of the temperature measuring component 4 for measuring the temperature of the battery unit 1.

[0139] It can be understood that the arrangement position of the temperature measuring component 4 on the battery unit 1 may not be limited. Exemplarily, at least two temperature measuring components 4 may be both located near the preset center line 6.

[0140] In one embodiment, please refer to Figure 3 , the monitoring cover plate 3 includes a cover plate body 33. The cover plate body 33 has a first groove 331 and a partition boss 332. The first groove 331 and the partition boss 332 are located on the side of the cover plate body 33 facing the battery unit 1. The first groove 331 and the partition boss 332 are arranged alternately in sequence. The direction in which the first groove 331 and the partition boss 332 are arranged in sequence intersects with the first direction and the second direction respectively. A part of the battery cell 11 is located in the first groove 331. The side of the partition boss 332 facing away from the battery unit 1 has a second groove 333.

[0141] Exemplarily, Figure 3 the direction shown by R3 in

[0142] Exemplarily, please refer to Figure 3 , the shape of the battery cell 11 can be cylindrical, and the first groove 331 and the partition boss 332 can both be arc-shaped.

[0143] In the embodiment of the present application, the first groove 331 and the partition boss 332 are arranged alternately in sequence, so that the cover plate body 33 is generally curved. A part of the battery cell 11 is located in the first groove 331, which is beneficial to increasing the contact area between the cover plate body 33 and the battery cell 11, and then beneficial to improving the limiting ability of the cover plate body 33 to the battery cell 11 along the direction in which the first groove 331 and the partition boss 332 are arranged alternately in sequence, and beneficial to improving the stability of the battery cell 11 in the battery cell assembly. The side of the partition boss 332 facing away from the battery unit 1 has a second groove 333, which is beneficial to reducing the weight of the cover plate body 33.

[0144] It can be understood that the cover plate body 33 can also be generally a flat plate, and the battery cell 11 is directly in contact with the cover plate body 33 that is generally a flat plate.

[0145] In one embodiment, please refer to Figures 1 to 3 , the monitoring cover plate 3 further includes a first reinforcing rib 34 and a second reinforcing rib 35. The first reinforcing rib 34 is disposed on the side of the cover plate body 33 facing away from the battery unit 1. The length direction of the first reinforcing rib 34 is arranged along the extending direction of the second groove 333. The first reinforcing rib 34 is located in the second groove 333. The first reinforcing rib 34 is arranged at intervals along the length direction of the mounting plate 2. The second reinforcing rib 35 is disposed on the side of the cover plate body 33 facing away from the battery unit 1. The second reinforcing rib 35 extends from one end of the cover plate body 33 to the other end of the cover plate body 33 along the length direction of the mounting plate 2. The second reinforcing rib 35 is arranged at intervals along the first direction.

[0146] Exemplarily, the first reinforcing rib 34 and the second reinforcing rib 35 are arranged perpendicular to each other.

[0147] In the embodiment of the present application, both the first reinforcing rib 34 and the second reinforcing rib 35 are disposed on the side of the cover plate body 33 facing away from the battery unit 1 and the first reinforcing rib 34 and the second reinforcing rib 35 are arranged to cross each other. On the one hand, the first reinforcing rib 34 and the second reinforcing rib 35 do not occupy the space between the cover plate body 33 and the battery unit 1, which is convenient for arranging the battery cell components more closely. On the other hand, it is beneficial to improve the bending resistance of the monitoring cover plate 3, and then beneficial to improve the overall strength of the battery cell components.

[0148] It can be understood that on the surface of the side of the cover plate body 33 facing away from the battery unit 1, only the first reinforcing rib 34 can be provided, or only the second reinforcing rib 35 can be provided, or neither the first reinforcing rib 34 nor the second reinforcing rib 35 can be provided.

[0149] In one embodiment, the battery cell 11 further includes an explosion-proof valve, and the explosion-proof valve is disposed on the surface of the housing where the conductive terminal is located.

[0150] Exemplarily, the explosion-proof valve can be a scored explosion-proof valve.

[0151] In the embodiment of the present application, the explosion-proof valve is disposed on the surface of the housing where the conductive terminal is located. When the pressure inside the battery cell 11 is too high, the explosion-proof valve can open to release the pressure inside the battery cell 11, which is beneficial to improving the safety of the battery cell 11, and then beneficial to improving the safety of the battery cell components.

[0152] For the battery cell component of the embodiment of the present application, please refer to Figures 1 to 4, the temperature measuring component 4 is located in the mounting hole 31 that penetrates the monitoring cover plate 3 along the second direction, so that the battery cell assembly has a larger space to arrange the temperature measuring component 4, which is convenient for the installation of the temperature measuring component 4. The temperature measuring component 41 is bonded to the outer shell of the battery cell 11 through the thermal conductive glue, which is conducive to the heat of the outer shell being transferred to the temperature measuring component 41 more evenly through the thermal conductive glue. The signal line 5 is partially located between the wire crimper 42 and the outer shell, which reduces the possibility of the signal line 5 driving the temperature measuring component 41 to tilt and cause the bonding to be loose before the thermal conductive glue is cured. The thermal conductive glue is filled in the filling cavity 42a surrounded by the wire crimper 42, and the temperature measuring component 41 is arranged at intervals from the outer shell. The thermal conductive glue can completely cover the temperature measuring component 41, and the temperature measuring component 41 can also be partially exposed from the thermal conductive glue. The shape of the battery cell 11 is cylindrical, and the shape of the temperature measuring component 41 is roughly rugby-shaped. The length direction of the temperature measuring component 41 is arranged along the axial direction of the battery cell 11, which is conducive to the temperature measuring component 41 to accurately measure the temperature of the outer shell of the battery cell 11. The structure of the thermometer 41 with small ends and large middle can play a guiding role. Even if there is a certain offset during the installation of the thermometer 41, the thermometer 41 can be well guided into the mounting hole 31. The wire pressing body 421 is quickly and firmly bonded to the shell by the installation glue. The installation glue can be a double-sided tape, and the wire pressing body 421 can be a foam. The groove wall of the wire groove 32 includes a first wall 321, a second wall 322 and a third wall 323. The first wall 321 and the second wall 322 are arranged in parallel, and the third wall 323 is arranged crosswise with the first wall 321, which is conducive to reducing the possibility of shrinkage cavities and shrinkage of the monitoring cover plate 3 during the injection molding process. The temperature measuring component 4 measures the temperature of the cylindrical side of the cylindrical battery cell 11, which is conducive to improving the accuracy of the temperature measurement of the temperature measuring component 4. Multiple temperature measuring components 4 are relatively evenly arranged on the battery unit 1 along the length direction of the mounting plate 2, which is conducive to improving the accuracy of the temperature measurement of the temperature measuring component 4. The cover body 33 has a first groove 331 and a separation boss 332, which can better constrain the battery cell 11, and the second groove 333 is conducive to reducing the weight of the cover body 33. The first reinforcing rib 34 and the second reinforcing rib 35 improve the bending resistance of the monitoring cover 3. The battery cell 11 also includes an explosion-proof valve to improve the safety performance of the battery cell 11.

[0153] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell component, characterized in that, Comprising: A battery cell, including one or at least two battery monomers, each battery monomer including a housing, an electrode assembly located within the housing, and a conductive terminal mounted on the housing, the conductive terminal being electrically connected to the electrode assembly, and the arrangement direction of the electrode assembly and the conductive terminal being the first direction; Mounting plates, with the mounting plates provided on both opposite sides of the battery cell along the first direction; A monitoring cover plate, mounted between the two mounting plates on both sides, with the monitoring cover plate provided on at least one side of the battery cell along a second direction, the second direction being arranged crosswise to the first direction, the monitoring cover plate and the two mounting plates on both sides enclosing a receiving cavity for accommodating the battery cell, and the monitoring cover plate having a mounting hole communicating with the receiving cavity; A temperature measuring assembly, located within the mounting hole, the temperature measuring assembly being in contact with the housing.

2. The battery cell assembly according to claim 1, characterized in that, The battery monomer assembly further includes a signal line, and the temperature measuring assembly includes: A temperature detector, electrically connected to the signal line; Thermal conductive adhesive, adhesively bonded to both the temperature detector and the housing; A wire presser, connected to the housing, with the signal line partially located between the wire presser and the housing.

3. The battery cell assembly according to claim 2, wherein, The wire presser surrounds the temperature detector, the shape of the wire presser being annular, the wire presser enclosing a filling cavity for accommodating the temperature detector, and the thermal conductive adhesive being filled within the filling cavity.

4. The battery cell assembly according to claim 3, characterized in that, The temperature detector within the filling cavity is arranged at an interval from the housing, and the temperature detector is located within the thermal conductive adhesive; or, the temperature detector is at least partially exposed from the thermal conductive adhesive on at least one side facing away from the housing.

5. The battery cell assembly according to claim 3, characterized in that, The shape of the battery monomer is cylindrical, the length direction of the temperature detector within the filling cavity is arranged along the axial direction of the battery monomer, the cross-sectional shape of the temperature detector is circular, the diameter of the cross-section of the temperature detector first increases and then decreases along the length direction of the temperature detector, and the signal line is electrically connected to one end of the length direction of the temperature detector.

6. The battery cell assembly according to claim 2, wherein, The wire presser includes: Mounting adhesive, adhesively bonded to the housing; A wire pressing body, adhesively bonded to the side of the mounting adhesive facing away from the housing.

7. The battery cell assembly according to claim 6, wherein The mounting adhesive is a double-sided adhesive, and / or, the wire pressing body is a foam.

8. The battery cell assembly according to claim 2, characterized in that The monitoring cover plate is an injection molded part, and on the side of the monitoring cover plate facing away from the battery cell, there is a wire groove communicating with the mounting hole, the signal line straddles the wire groove and the mounting hole, the hole wall of the mounting hole is arc-shaped, the groove wall of the wire groove includes a first wall, a second wall, and a third wall corresponding to each mounting hole, the first wall and the second wall are arranged in parallel, the third wall is respectively connected to one circumferential end of the hole wall of the mounting hole and the first wall, the third wall intersects with the first wall, and the second wall is connected to the other circumferential end of the hole wall of the mounting hole.

9. The battery cell assembly according to claim 1, wherein, The shape of the housing of the battery monomer is cylindrical, the conductive terminal is mounted at one end of the axial direction of the housing, and the temperature measuring assembly is in contact with the cylindrical surface of the housing.

10. The battery cell assembly according to any one of claims 1 to 9, characterized in that, The number of the temperature measuring assemblies is at least two, and at least two temperature measuring assemblies are arranged at intervals along the length direction of the mounting plate, and the length direction of the mounting plate is respectively arranged crosswise to the first direction and the second direction; At least one of the temperature measuring components is located at one end of the battery unit along the length direction of the mounting plate; Projected along the second direction, the center line of the projection area of the monitoring cover along the length direction of the mounting plate is a preset center line, and the distance between at least one of the temperature measuring components and the preset center line is less than 50 mm.

11. The battery cell assembly according to any one of claims 1 to 9, characterized in that, The monitoring cover includes a cover body, which has a first groove and a partition boss. The first groove and the partition boss are located on the side of the cover body facing the battery cell. The first grooves and the partition bosses are alternately arranged in sequence. The directions in which the first grooves and the partition bosses are arranged in sequence are respectively arranged to cross the first direction and the second direction. The battery cell is partially located in the first groove, and the partition boss has a second groove on the side away from the battery cell.

12. The battery cell assembly according to claim 11, wherein, The monitoring cover plate also includes: A first reinforcing rib is disposed on a side of the cover plate body away from the battery unit, the length direction of the first reinforcing rib is arranged along the extension direction of the second groove, the first reinforcing rib is located in the second groove, and the first reinforcing rib is arranged at intervals along the length direction of the mounting plate; The second reinforcing rib is arranged on a side of the cover body away from the battery unit, and the second reinforcing rib extends from one end of the cover body to the other end of the cover body along the length direction of the mounting plate, and the second reinforcing rib is arranged at intervals along the first direction.

13. The battery cell assembly according to any one of claims 1 to 9, characterized in that The battery cell further includes an explosion-proof valve, which is disposed on the surface of the housing where the conductive terminal is located.

14. A battery device, characterized in that, include: Box; The battery monomer assembly according to any one of claims 1 to 13, wherein the battery monomer assembly is disposed in the box.

15. An electrical device, characterized in that, include: The battery device according to claim 14; The battery device is arranged on the electricity-consuming subject, and the battery device provides power for the electricity-consuming subject.

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