CN112331946A

CN112331946A - Battery and electric equipment

Info

Publication number: CN112331946A
Application number: CN202110013579.5A
Authority: CN
Inventors: 刘建华; 陈宗辉; 李志强; 连晓刚
Original assignee: Jiangsu Contemporary Amperex Technology Ltd
Current assignee: Jiangsu Contemporary Amperex Technology Ltd
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-02-05

Abstract

The application relates to a battery and electric equipment, and belongs to the technical field of batteries. The application provides a battery, includes: a battery cell; the temperature measuring assembly is used for measuring the temperature of the battery monomer; the bracket is used for mounting the temperature measuring component, and the temperature measuring component is in sliding fit with the bracket; and the elastic component is used for being connected with the bracket and the temperature measuring component, and is configured to apply an elastic force parallel to the sliding direction of the temperature measuring component to the temperature measuring component so as to enable the temperature measuring component to abut against the single battery. The application also provides an electric device comprising the battery. Under the harsh working conditions of vibration, impact and the like and after long-time use, the battery and the electric equipment can always keep the sampling stability of the temperature measurement component.

Description

Battery and electric equipment

Technical Field

The application relates to the technical field of batteries, in particular to a battery and electric equipment.

Background

In the battery working process, the battery monomer can generate heat in the power supply process, if the temperature of the battery monomer is too high, not only can potential safety hazards be caused, but also the output power can be influenced. The conventional electric equipment such as a vehicle comprises a battery management system, and the output power of a battery can be adjusted by detecting the temperature of a battery cell so as to ensure the normal performance of the efficiency of the battery. In order to detect the temperature of the battery cell, temperature sampling is generally performed on the surface of the battery cell using a temperature measuring assembly. However, under severe working conditions such as vibration and impact and after long-term use, the temperature measurement component is easily separated from the surface of the battery cell, thereby affecting the sampling stability of the temperature measurement component.

Disclosure of Invention

Therefore, the application provides a battery and electric equipment, which can keep the sampling stability of the temperature measurement component.

In a first aspect, a battery is provided, comprising: a battery cell; the temperature measuring assembly is used for measuring the temperature of the battery monomer; the bracket is used for mounting the temperature measuring component, and the temperature measuring component is in sliding fit with the bracket; and the elastic component is used for being connected with the bracket and the temperature measuring component, and is configured to apply an elastic force parallel to the sliding direction of the temperature measuring component to the temperature measuring component so as to enable the temperature measuring component to abut against the single battery. The temperature measurement component comprises: the shell comprises a first end and a second end which are opposite, and the first end is provided with a first opening; a heat conducting member disposed at the first end for closing the first opening; and a thermistor disposed in the case and in contact with the heat conductive member; wherein the elastic component is configured to apply elastic force to the temperature measurement component so that the heat conduction component abuts against the battery cell.

On one hand, when the battery is vibrated and impacted, the elastic component can always abut the temperature measuring component against the sampling area of the battery monomer through elastic force, so that the temperature measuring component is always in heat conduction connection with the sampling area, and the sampling stability of the temperature measuring component is further kept; on the other hand, the elastic force applied to the temperature measuring component by the elastic component is parallel to the sliding direction of the temperature measuring component, and after the temperature measuring component is used for a long time, the elastic component still has good elasticity, so that the temperature measuring component is firmly abutted to the sampling area of the battery cell, and the sampling stability of the temperature measuring component is further kept. The temperature measurement assembly can keep abutting joint in the sampling area under the elastic force action of the elastic component, and the first opening is sealed at the first end by the heat conduction component, so that the waterproofness of the first end can be increased, and the phenomenon that the thermistor is short-circuited due to water is avoided.

In some embodiments, the bracket is provided with a mounting hole, and the temperature measuring assembly is slidably arranged in the mounting hole in a penetrating manner, so that the temperature measuring assembly can be guided to stably slide.

Wear to locate the mounting hole with temperature measuring component slidable, not only can make temperature measuring component along the mounting hole steady slip, still be convenient for provide a butt anchor ring that supplies the elastic component butt on the surface of support, when the one end butt of elastic component in the butt anchor ring, other end butt can provide the elastic force parallel with temperature measuring component's slip direction to temperature measuring component when temperature measuring component is in temperature measuring component, the angle is crooked when avoiding temperature measuring component butt in the sampling region.

In some embodiments, the elastic member is sleeved on the temperature measurement assembly, one end of the elastic member abuts against the bracket, and the other end of the elastic member abuts against the temperature measurement assembly.

The elastic component is sleeved on the temperature measuring assembly, and the two ends of the elastic component are respectively abutted against the support and the temperature measuring assembly, so that the elastic component not only occupies a smaller arrangement space and reduces the volume of the support, but also can act on the temperature measuring assembly in a circumferential balanced manner, and pushes the temperature measuring assembly to slide relative to the support along the direction of the elastic force.

In some embodiments, the battery further comprises: the limiting part is fixed on the temperature measuring component, and the limiting part is used for abutting against one side of the support, which is far away from the battery monomer, so that the temperature measuring component is prevented from being separated from the support along the direction of the elastic force.

Through the locating part with the one-way card of temperature measurement subassembly on the support, can be convenient for avoid temperature measurement subassembly to drop from the mounting hole under the action of gravity when transporting support, temperature measurement subassembly, elastomeric element and locating part as an organic whole of preassembly.

In some embodiments, the limiting member is a snap spring, a circumferential ring groove is formed in the outer circumferential surface of the temperature measuring component, and the snap spring is clamped into the circumferential ring groove.

After the clamp spring is clamped into the circumferential annular groove, the clamp spring can circumferentially protrude out of the outer circumferential surface of the temperature measuring component, under the self gravity of the temperature measuring component, the clamp spring is hung on the support, the circumferential annular groove is easy to process, the clamp spring is low in cost and convenient and quick to assemble, and the clamp spring is not easy to fall off after being assembled.

In some embodiments, the second end is provided with a second opening, the temperature measuring assembly further comprises a lead, one end of the lead is connected with the thermistor, the other end of the lead extends out of the second opening, and the lead is connected with the second opening in a sealing manner.

Through sealing first opening and second opening respectively, form confined inner chamber in the shell, thermistor is located the inner chamber, is connected through wire and external circuit electricity, is connected through heat-conducting component and outside heat conduction, can enough normally work in operational environment, has better waterproof nature again.

In some embodiments, the elastic member is sleeved on the housing, and one end of the elastic member abuts against the bracket and the other end abuts against the housing.

In some embodiments, a protrusion is provided on an outer circumferential surface of the housing, and the protrusion is configured to abut against the elastic member.

In some embodiments, the battery further comprises: and the mounting component is fixed on the battery monomer, and the bracket is fixed on the mounting component.

By providing the mounting member, the surface structure of the battery cell can be simplified, and the bracket can be fixed to the mounting member, thereby fixing the bracket to the sampling region.

In some embodiments, one of the bracket and the mounting component is provided with a buckle, and the other is provided with a clamping groove, and the bracket is fixed on the mounting component through the matching of the buckle and the clamping groove.

The bracket is fixed on the mounting part in a mode of matching the buckle with the clamping groove, so that the assembly is easy, the fixation is firm, and the disassembly is convenient.

In some embodiments, one of the bracket and the mounting component is provided with a guide groove, and the other is provided with a guide part, the guide part is in plug fit with the guide groove, and the plug direction of the guide part is parallel to the direction of the elastic force.

Through setting up grafting complex guide part and guide way, can lead the support in the in-process of installing the support mounting in the installing component to the process of installing the support mounting in the installing component has been simplified. When the grafting direction of guide part is parallel with the direction of elastic force, can make the vertical installation component that inserts of support, at the in-process compression elastic component of installing support to through elastic force with temperature measurement subassembly butt in battery monomer.

In a second aspect, an electrical device is provided, comprising the battery of the first aspect, the battery being configured to provide electrical energy.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of an electric device provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a battery provided in an embodiment of the present application;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is a schematic structural diagram of a view angle of a temperature measuring device for a battery according to an embodiment of the present disclosure;

FIG. 5 is a cross-sectional view of a temperature measuring device for a battery according to an embodiment of the present disclosure;

fig. 6 is a partial structural schematic view of a mounting part of a battery provided in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another view angle of a temperature measuring device for a battery according to an embodiment of the present disclosure;

fig. 8 is an exploded view of a temperature measuring device for a battery according to an embodiment of the present disclosure.

Icon: 1-a vehicle; 10-a battery; 11-a battery cell; 12-a scaffold; 121-a scaffold first surface; 122-a stent second surface; 123-bracket first side; 124-the second side of the bracket; 125-mounting holes; 126-slotting; 127-fastener; 128-a guide; 129-sink table tank; 13-temperature measuring component; 131-a housing; 1311-a first end; 1312-a second end; 1313-a projection; 1314-circumferential ring groove; 1315-lumen; 1316-a first opening; 1317 — a second opening; 132-a thermally conductive member; 133-a thermistor; 134-a wire; 14-an elastic member; 141-an elastic member first end; 142-a resilient member second end; 15-a mounting member; 151-card slot; 152-a guide groove; 16-a limit piece; 20-a controller; 30-motor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "disposed," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The battery cell mentioned in the embodiments of the present application may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, and the embodiments of the present application are not limited thereto. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application. The battery cells are generally divided into three types in an encapsulation manner: the cylindrical battery monomer, the square battery monomer and the soft package battery monomer are not limited in the embodiment of the application.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, etc. Batteries generally include a case for enclosing one or more battery cells. The box can avoid liquid or other foreign matters to influence the charging or discharging of battery monomer.

Among the prior art, the battery includes battery monomer, battery management system and temperature measurement subassembly, and the free surface of battery includes the sampling area, and temperature measurement subassembly butt is in sampling area in order to gather the free instant temperature of battery, and the instant temperature value that the temperature measurement subassembly was gathered can be understood as the free inside temperature value of battery. Generally, the normal working temperature of the battery monomer is-30-50 ℃, and when the battery management system detects that the instant temperature of the battery monomer exceeds the normal working temperature range, the battery management system limits the output power of the battery to realize safety protection.

Therefore, if the instant temperature value collected by the temperature measurement component has a large deviation from the actual working temperature of the battery cell, the output power of the battery is limited under the condition that the temperature inside the battery cell is normal by the battery management system, and the performance of the battery is affected.

However, under severe working conditions such as vibration and impact and after long-time use, the existing temperature measurement assembly may be separated from the sampling area of the battery cell, which results in failure of the temperature measurement function of the temperature measurement assembly, and thus causes a large deviation between the temperature value acquired by the temperature measurement assembly and the actual working temperature of the battery cell.

In view of this, the embodiment of the present application provides a technical solution, in which the temperature measurement component can be always abutted against the sampling region of the battery cell by the elastic force applied to the temperature measurement component by the elastic component, and the sampling stability of the temperature measurement component can be maintained.

The embodiments of the present application describe technical solutions applicable to various electric devices using a battery, for example, a mobile phone, a portable device, a notebook computer, a battery car, an electric vehicle, a ship, a spacecraft, an electric toy, an electric tool, and the like, for example, a spacecraft including an airplane, a rocket, a space plane, a spacecraft, and the like, an electric toy including a stationary or mobile electric toy, for example, a game machine, an electric vehicle toy, an electric ship toy, an electric plane toy, and the like, and an electric tool including a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, and an electric planer.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to be applied to the above-described apparatuses, but may also be applied to all apparatuses using a battery, and for brevity of description, the following embodiments are all described by taking a vehicle as an example.

For example, as shown in fig. 1, in some embodiments of the present application, the electric device is a vehicle 1, the vehicle 1 may be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile may be a pure electric automobile, a hybrid automobile, or an extended range automobile, etc. A battery 10 is provided inside the vehicle 1. For example, the battery 10 may be provided at the bottom or the head or tail of the vehicle 1.

In some embodiments of the present application, the battery 10 may be used for power supply of the vehicle 1, for example, the battery 10 may serve as an operation power source of the vehicle 1.

In other embodiments of the present application, the battery 10 may be used not only as an operation power source of the vehicle 1 but also as a driving power source of the vehicle 1, instead of or in part replacing fuel or natural gas to provide driving power for the vehicle 1.

As shown in fig. 1, a controller 20 and a motor 30 may also be provided inside the vehicle 1. The controller 20 is used to control the battery 10 to supply power to the motor 30, for example, for operational power requirements at start-up, navigation, and travel of the vehicle 1.

Fig. 2 is a schematic diagram of a battery 10 according to some embodiments of the present disclosure. The battery 10 includes a plurality of battery cells 11, and the plurality of battery cells 11 may be connected in series or in parallel or in series-parallel, where series-parallel refers to a mixture of series connection and parallel connection. In some embodiments, a plurality of battery cells 11 may be connected in series or in parallel or in series-parallel to form a battery module, and a plurality of battery modules may be connected in series or in parallel or in series-parallel to form a battery 10. That is, the plurality of battery cells 11 may be directly assembled into the battery 10, or may be assembled into a battery module, and then the battery module is assembled into the battery 10.

As shown in fig. 3, the battery 10 includes a battery cell 11, a holder 12, a temperature measuring assembly 13, and an elastic member 14. The temperature measuring component 13 is used for measuring the temperature of the battery monomer 11, the support 12 is used for installing the temperature measuring component 13, and the temperature measuring component 13 is in sliding fit with the support 12. The elastic member 14 is connected to the holder 12 and the temperature measurement unit 13, and the elastic member 14 is configured to apply an elastic force parallel to the sliding direction of the temperature measurement unit 13 to the temperature measurement unit 13 so that the temperature measurement unit 13 abuts against the sampling region of the battery cell 11.

In the battery 10 of the embodiment of the present application, the temperature measuring component 13 is in sliding fit with the bracket 12, and the elastic force applied to the temperature measuring component 13 by the elastic component 14 is parallel to the sliding direction of the temperature measuring component 13. Under the elastic force of the elastic component 14, the temperature measuring component 13 abuts against the sampling region of the battery cell 11 to measure the temperature of the battery cell 11.

On one hand, when the battery is vibrated and impacted, the elastic force exerted by the elastic component 14 always enables the temperature measuring component 13 to be abutted against the sampling area of the battery monomer 11, so that the temperature measuring component 13 is always in heat conduction connection with the sampling area, and the sampling stability of the temperature measuring component 13 is further kept; on the other hand, after long-term use, the elastic component 14 still has good elasticity, so that there is always enough elastic force to firmly abut the temperature measuring component 13 against the sampling region of the battery cell 11, thereby maintaining the sampling stability of the temperature measuring component 13.

In some embodiments of the present disclosure, the sampling region is located on a cover plate of the battery cell 11, the temperature of the cover plate is relatively close to the internal temperature of the battery cell 11, and the cover plate of the battery cell 11 has enough installation space for arranging the temperature measuring component 13.

For example, the sampling region is located in a region of a cover plate of the battery cell 11 close to the negative electrode terminal, and compared with other regions of the cover plate close to the positive electrode terminal, between the positive electrode terminal and the negative electrode terminal, the temperature of the region of the cover plate close to the negative electrode terminal is closest to the internal temperature of the battery cell 11, and the instantaneous temperature collected by the temperature measurement component 13 is closer to the internal temperature of the battery cell 11, so that the temperature sampling precision of the battery management system is improved, and the reliability of the battery management system is improved.

In other embodiments, the battery 10 further includes a bus bar for connecting the plurality of battery cells 11 in series or in parallel, the bus bar is welded and fixed to the electrode terminals of the battery cells 11, and the sampling region may also be located on the surface of the bus bar, so that it is not necessary to reserve an area for the temperature measuring assembly 13 to abut on the cover plate of the battery cells 11, the structure of the cover body is simplified, and the manufacturing cost of the cover body is reduced.

As shown in fig. 4, the bracket 12 is used for mounting the temperature measuring assembly 13 and is directly or indirectly fixed to the battery cell 11, so that the relative position of the bracket 12 and the sampling region is fixed. The temperature measuring component 13 is slidably engaged with the bracket 12 along the direction R (as shown in fig. 3) to abut against the sampling region of the battery cell 11.

In some embodiments of the present application, the bracket 12 is made of plastic, and is made of polypropylene, acryl resin, or other composite plastic materials by injection molding, which is not only light in weight, but also high in strength.

In other embodiments, the bracket 12 may also be a sheet metal part or a cast part.

As shown in fig. 4, the cradle 12 includes a cradle first surface 121, a cradle second surface 122, a cradle first side 123, and a cradle second side 124. The second surface 122 of the bracket is a surface close to one side of the battery cell 11, the first surface 121 of the bracket is a surface far away from one side of the battery cell 11, the first side 123 of the bracket is used for being directly or indirectly connected with the battery cell 11, and the second side 124 of the bracket is another side opposite to the first side 123 of the bracket.

As shown in FIG. 4, in some embodiments of the present application, the bracket 12 is provided with a mounting hole 125, and the temperature measuring component 13 is slidably disposed through the mounting hole 125.

As shown in FIG. 4, the mounting hole 125 penetrates through the first surface 121 and the second surface 122 of the bracket, and the sliding direction of the thermometric assembly 13 is parallel to the axis of the mounting hole 125.

As shown in fig. 4, the wall of the mounting hole 125 is further provided with a slit 126 extending along the axial center line thereof, and the slit 126 is located on the second side 124 of the bracket, so that the mounting hole 125 becomes an open-type hole slot capable of accommodating small changes in the hole diameter due to temperature difference changes, thereby reducing deformation and breakage of the bracket 12 due to temperature difference changes.

The temperature measuring component 13 is slidably inserted into the mounting hole 125, so that the temperature measuring component 13 can stably slide along the axial line direction of the mounting hole 125, and an abutting ring surface is conveniently provided on the second surface 122 of the bracket, and the axial line of the abutting ring surface is coincident with the axial line of the mounting hole 125. When one end of the elastic component 14 abuts against the abutting ring surface and the other end abuts against the temperature measuring component 13, an elastic force parallel to the sliding direction of the temperature measuring component 13 can be provided for the temperature measuring component 13, and the temperature measuring component 13 is prevented from abutting against the sampling region and inclining in angle.

In other embodiments, the bracket 12 and the thermometric assembly 13 are slidably engaged via a rail assembly.

In some embodiments of the present application, the thermometric component 13 abuts the sampling region perpendicularly to avoid side-slipping due to a side component generated by the acting force of the thermometric component 13 abutting the sampling region in the tangential direction of the abutment.

In other embodiments, the temperature measuring component 13 may be abutted against the sampling region at other angles according to the requirement of the actual installation space, and the contact area between the temperature measuring component 13 and the sampling region is increased to ensure that the temperature measuring component is stably abutted against the sampling region.

As shown in fig. 5, the elastic member 14 is configured to apply an elastic force parallel to the sliding direction of the temperature measurement member 13 to the temperature measurement member 13 so that the temperature measurement member 13 abuts against the battery cell 11.

As shown in fig. 5, the two ends of the elastic member 14 are an elastic member first end 141 and an elastic member second end 142, respectively, the elastic member first end 141 is abutted against the holder 12, and the elastic member second end 142 is abutted against the temperature measuring unit 13.

The temperature measuring unit 13 is moved in a direction approaching the sampling region of the battery cell 11 by the elastic force of the elastic member 14, and the heat conductive member 132 of the temperature measuring unit 13 is brought into contact with the sampling region.

In some embodiments of the present application, the elastic member 14 is a straight spring, and the elastic force is parallel to the sliding direction of the housing 131 relative to the bracket 12.

In other embodiments, the elastic component 14 may also be other components capable of applying elastic force in the same direction, such as a silicone gasket strip.

As shown in FIG. 5, in some embodiments, the elastic member 14 is disposed on the temperature measuring component 13, and one end of the elastic member 14 abuts against the bracket 12 and the other end abuts against the temperature measuring component 13. This not only makes the elastic component 14 and the temperature measurement component 13 occupy a smaller arrangement space together, but also can act on the temperature measurement component 13 in a circumferentially balanced manner, and push the temperature measurement component 13 to stably slide in the mounting hole 125.

In other embodiments, the elastic component 14 may be disposed separately from the temperature measuring component 13, for example, two elastic components 14 are disposed, and two elastic components 14 are symmetrically disposed on two sides of the temperature measuring component 13, and act on the temperature measuring component 13 from two sides of the temperature measuring component 13 in a balanced manner.

As shown in FIG. 5, the thermometric assembly 13 optionally includes a housing 131, a thermally conductive member 132, and a thermistor 133.

The housing 131 includes opposite first and

second ends

1311, 1312, the first end 1311 protruding out of the holder second surface 122 so as to abut against the sampling region; the second end 1312 extends out of the first surface 121 of the bracket to expose one end of the conductive line 134 outside the first surface 121 of the bracket for connection to an external circuit.

In some embodiments of the present application, the elastic component 14 is sleeved on the outer casing 131 of the temperature measurement component 13, the first end 141 of the elastic component abuts against the second bracket surface 122 of the bracket 12, and the second end 142 of the elastic component abuts against the outer casing 131, so that not only a small arrangement space is occupied and the volume of the bracket 12 is reduced, but also the elastic component can circumferentially act on the outer casing 131 in a balanced manner, and the temperature measurement component 13 is pushed to slide along the axial line direction of the mounting hole 125.

As shown in fig. 5, a protrusion 1313 is disposed on the outer peripheral surface of the housing 131, and the protrusion 1313 includes a limiting ring surface, which is parallel to the bracket second surface 122 and is configured to abut against the elastic member second end 142.

Preferably, the protrusion 1313 is disposed at the first end 1311, so as to provide a sufficient accommodation space for the elastic member 14, and the elastic member 14 may be sized to be long, so as to provide a large elastic force.

As shown in fig. 5, the first end 1311 is provided with a first opening 1316. A thermally conductive member 132 is disposed at the first end 1311 for closing the first opening 1316, and a thermistor 133 is disposed within the housing 131 and in contact with the thermally conductive member 132. The elastic member 14 applies an elastic force to the case 131 of the temperature measuring unit 13, so that the heat conductive member 132 abuts against the battery cell 11.

The temperature measuring assembly 13 of this type can be always in heat conduction contact with the sampling region under the elastic force of the elastic member 14, and the heat conduction member 132 closes the first opening 1316 at the first end 1311, so that the waterproofness of the first end 1311 can be increased, and the thermistor 133 is prevented from being short-circuited due to water.

The heat conducting member 132 is made of a material with a large heat conductivity and elasticity, after the first opening 1316 is sealed by the heat conducting member 132, the heat conducting member 132 is in contact with the thermistor 133, and the heat conducting member 132 protrudes outward from the first end 1311, when the first end 1311 of the temperature measuring component 13 is abutted against the sampling area under the action of the elastic member 14, the heat conducting member 132 is in contact with the sampling area, and the heat conducting connection is maintained while friction force is increased to avoid the temperature measuring component 13 from sideslipping.

In some embodiments of the present application, the thermal conductive member 132 may be a thermally conductive paste that contacts the thermistor 133, closes the first opening 1316, and protrudes outward beyond the first end 1311. Under the elastic force of the elastic member 14, the heat conductive paste abuts against the sampling region of the battery cell 11, and heat is conducted from the sampling region to the thermistor 133 via the heat conductive member 132.

In another embodiment, the thermal conductive member 132 may also be a thermal pad, the area of the thermal pad is larger than the area of the first opening 1316, the thermal pad is attached to the first end 1311 from the outer side of the housing 131 and closes the first opening 1316, the inner side of the thermal pad is in contact with the thermistor 133, and the outer side of the thermal pad abuts against the sampling area of the battery cell 11 under the elastic force of the elastic member 14.

Further, when the thermal conductive member 132 is a thermal conductive pad, a thermal conductive adhesive may be applied to the sampling area to adhere the thermal conductive pad to the sampling area, so as to prevent the temperature measurement component 13 from sliding laterally during operation.

The heat-conducting member 132 has elasticity, and applies a certain force to the sampling region by elastic deformation so as to firmly abut against the sampling region.

As shown in FIG. 5, the second end 1312 is provided with a second opening 1317, the temperature measuring assembly 13 further comprises a lead 134, one end of the lead 134 is connected with the thermistor 133, the other end of the lead 134 extends out of the second opening 1317, and the lead 134 is hermetically connected with the second opening 1317.

Specifically, two wires 134 are provided, and each wire 134 has one end connected to the thermistor 133 and the other end extending from the second opening 1317.

The first opening 1316 and the second opening 1317 are sealed respectively, a closed inner cavity 1315 is formed inside the casing 131, the thermistor 133 is located in the inner cavity 1315, is electrically connected with an external circuit through the lead 134, and is connected with the battery cell 11 through the heat conducting member 132 in a heat conducting manner, so that the battery cell can normally work in a working environment and has good waterproof performance.

For example, the cavity 1315 is filled with an injection molding material, such as acrylonitrile butadiene styrene or polypropylene, to fix the thermistor 133 in the cavity 1315 and close the second opening 1317.

As shown in fig. 6, in some embodiments of the application, the battery 10 further includes a mounting member 15, and the mounting member 15 is fixed to the battery cell 11 for fixing the bracket 12. The mounting part 15 is used for fixing the bracket 12, so that the bracket 12 is fixed stably and displacement of the bracket 12 is avoided.

The mounting member 15 is directly or indirectly fixed to the battery cell 11, and the mounting member 15 is, for example, a harness plate.

In some embodiments of the present application, the battery 10 further includes a housing with an opening at an upper end and a housing cover, the battery cell 11 is fixed in the housing, the mounting member 15 is disposed on a top surface of the battery cell 11, the housing cover covers the housing, and at the same time, the housing cover presses the mounting member 15 onto the top surface of the battery cell 11, and the housing cover closes and at the same time, the battery cell 11 is fixed inside the battery 10.

In other embodiments, the mounting member 15 may be directly fixed to the top surface of the battery cell 11, for example, fastened or glued to the cover of the battery cell 11 by screws, or the like.

In some embodiments, one of the bracket 12 and the mounting member 15 is provided with a snap and the other is provided with a catch, and the bracket 12 is fixed to the mounting member 15 by the cooperation of the snap and the catch.

For example, as shown in fig. 6, a card slot 151 is provided in the mounting part 15; as shown in fig. 7, the catch 127 is disposed on the bracket first side 123 of the bracket 12. The support 12 is easily assembled, fixed and firm through the cooperation of the buckle 127 and the clamping groove 151 so as to be fixed on the mounting part 15, and is convenient to disassemble, and when the support 12 is a plastic part, the buckle 127 is elastically designed through the self of the plastic part, and the hook part of the buckle 127 deforms to be fixed on the clamping groove 151.

For another example, in another embodiment, the engaging groove may be provided on the bracket 12 and the engaging member may be provided on the mounting member 15 to simplify the structure of the bracket 12.

In other embodiments, screws may be used to secure the bracket 12 to the mounting member 15, or the bracket 12 may be glued to the mounting member 15.

In some embodiments of the present application, one of the bracket 12 and the mounting member 15 is provided with a guide groove, and the other is provided with a guide portion, the guide portion is in insertion fit with the guide groove, and the insertion direction of the guide portion is parallel to the direction of the elastic force.

The guide portion 128 is fitted in the guide groove 152 in an insertion manner, the insertion direction of the guide portion 128 is the direction in which the bracket 12 is fitted into the mounting component 15, and the insertion direction of the guide portion 128 is parallel to the direction of the elastic force. By providing the guide portion 128 and the guide groove 152 which are fitted in the insertion manner, the bracket 12 can be mounted in the mounting member 15 in the insertion direction of the guide portion 128, and the process of mounting the bracket 12 on the mounting member 15 is simplified. The insertion direction of the guide portion 128 is parallel to the direction of the elastic force, and the elastic member 14 can be compressed in the process of mounting the bracket 12, so that after the bracket 12 is mounted on the mounting member 15, the temperature measuring unit 13 is also elastically abutted to the sampling region of the battery cell 11 by the elastic member 14.

For example, as shown in fig. 6, the guide groove 152 is provided in the mounting member 15; as shown in fig. 7, the guide portion 128 is provided to the holder 12. In the process of mounting the bracket 12 on the mounting member 15, the guide portion 128 is assembled in alignment with the guide groove 152, which is not only easy to operate but also efficient in assembly.

For example, the guide groove may be provided in the holder 12 and the guide portion may be provided in the mounting member 15, thereby simplifying the structure of the holder 12.

In other embodiments, the insertion direction of the guiding portion may not be parallel to the elastic force direction according to the space of the mounting part 15 where the bracket 12 is mounted in the actual assembly process.

In some embodiments of the present application, the guide portion 128 and the clip 127 are both disposed on the bracket 12, and the guide portion 128 is formed on the side surface of the clip 127, and correspondingly, the locking groove 151 and the guide groove 152 are both disposed on the mounting part 15 and connected as a through groove, and the guide and fixing functions are integrated with the through groove and the integrated clip, thereby simplifying the construction of the mounting part 15 and the bracket 12.

In other embodiments, the guide 128 and the catch 127 of the bracket 12 may be separate depending on the particular configuration of the bracket 12.

As shown in fig. 8, in some embodiments of the present application, the battery 10 further includes a limiting member 16, the limiting member 16 is fixed to the housing 131 of the temperature measuring assembly 13, and the limiting member 16 is configured to abut against a side of the bracket 12 away from the battery cell 11, so as to prevent the temperature measuring assembly 13 from being separated from the bracket 12 along the direction of the elastic force.

In the assembling process, the bottom surface of the limiting member 16 abuts against the first surface 121 of the bracket to limit the temperature measuring component 13 on the bracket 12, so as to prevent the temperature measuring component 13 from falling off the bracket 12 under the action of gravity.

As shown in fig. 8, for example, the limiting member 16 is a snap spring, a circumferential annular groove 1314 is formed on the outer circumferential surface of the housing 131 of the temperature measuring component 13, and the snap spring is snapped into the circumferential annular groove 1314.

With this configuration, the snap spring can be easily fixed to the housing 131, and the outer peripheral surface of the stopper 16 can protrude from the outer peripheral surface of the housing 131. In the process of installing the temperature measuring component 13 on the bracket 12, the temperature measuring component 13 can be inserted into the installation hole 125 from the second surface 122 of the bracket, and then the limiting member 16 is clamped into the circumferential annular groove 1314, so that the assembling process of the temperature measuring component 13 and the bracket 12 is simpler.

Preferably, a circumferential groove 1314 is formed in the circumferential wall of the housing 131 near the second end 1312 to minimize the height of the housing 131 from penetrating the first surface 121 of the bracket and avoiding the space above the first surface 121 of the bracket for installing other devices.

In other embodiments, the temperature measuring assembly 13 can be installed laterally from the slit 126 without providing the limiting member 16.

As shown in fig. 8, further, the mounting hole 125 is provided with a counter sink groove 129 at the opening of the bracket first surface 121 for accommodating the limiting member 16, and a bottom wall of the counter sink groove 129 abuts against a bottom surface of the limiting member 16. By providing the counter sink 129, the position-limiting member 16 can be prevented from protruding from the first surface 121 of the bracket, so that the position-limiting member 16 can be prevented from occupying a space above the first surface 121 of the bracket.

As shown in fig. 8, the method of elastically abutting the temperature measuring unit 13 against the sampling region of the battery cell 11 is as follows:

sleeving the elastic component 14 on the outer wall of the housing 131, penetrating the second end 1312 of the temperature measuring assembly 13 sleeved with the elastic component 14 through the mounting hole 125 of the bracket 12 from the bracket second surface 122, fixing the limiting piece 16 on the circumferential annular groove 1314 above the bracket first surface 121, and mounting the temperature measuring assembly 13 and the elastic component 14 on the bracket 12 to form a preassembled integrated temperature measuring device;

the temperature measuring device assembled in one piece in advance is moved to the position above the sampling area of the battery cell 11 in the posture that the first surface 121 of the bracket faces upwards, the buckle 127 is inserted into the clamping groove 151, the guide part 128 is inserted into the guide groove 152, the elastic component 14 is compressed to enable the elastic component 14 to be elastically abutted between the bracket 12 and the sampling area, and the elastic component 14 elastically abuts the temperature measuring assembly 13 to the sampling area through elastic force.

The principle of realizing the temperature measurement component 13 for keeping the sampling stability is as follows:

the first end 141 of the elastic member 14 abuts against the second surface 122 of the bracket, the second end 142 of the elastic member abuts against the protruding portion 1313, after the bracket 12 is fixed to the mounting member 15, the mounting member 15 is pressed against the top surface of the battery cell 11 through the housing cover, the position of the bracket 12 relative to the sampling region of the battery cell 11 is fixed, the elastic member 14 pushes the temperature measuring component 13 to be pressed against the sampling region under the elastic force, so that the heat conducting member 132 is always in heat conducting connection with the sampling region, the heat in the sampling region is transferred to the thermistor 133 through the heat conducting member 132, the thermistor 133 is connected with an external circuit through the wire 134, the corresponding instantaneous temperature of the sampling region is calculated and derived by detecting the thermal resistance values of the thermistor 133 at different temperatures, and the detected instantaneous temperature of the sampling region is used as the instantaneous temperature of the battery cell 11.

It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery, comprising:

a battery cell;

the temperature measuring assembly is used for measuring the temperature of the battery monomer;

the bracket is used for mounting the temperature measuring component, and the temperature measuring component is in sliding fit with the bracket;

the elastic component is connected with the bracket and the temperature measuring component and is configured to apply an elastic force parallel to the sliding direction of the temperature measuring component to the temperature measuring component so as to enable the temperature measuring component to abut against the battery monomer;

the temperature measurement component comprises:

the shell comprises a first end and a second end which are opposite, and the first end is provided with a first opening;

a heat conducting member disposed at the first end for closing the first opening; and

a thermistor disposed in the housing and in contact with the heat conductive member;

wherein the elastic component is configured to apply elastic force to the temperature measurement component so that the heat conduction component abuts against the battery cell.

2. The battery of claim 1, wherein the bracket is provided with a mounting hole, and the temperature measuring component is slidably disposed through the mounting hole.

3. The battery of claim 1, wherein the elastic member is sleeved on the temperature measurement assembly, one end of the elastic member abuts against the bracket, and the other end of the elastic member abuts against the temperature measurement assembly.

4. The battery of claim 1, further comprising:

the limiting part is fixed on the temperature measuring component, and the limiting part is used for abutting against one side of the support, which is far away from the battery monomer, so that the temperature measuring component is prevented from being separated from the support along the direction of the elastic force.

5. The battery of claim 4, wherein the limiting member is a snap spring, the outer peripheral surface of the temperature measuring component is provided with a circumferential ring groove, and the snap spring is snapped into the circumferential ring groove.

6. The battery of claim 1, wherein the second end is provided with a second opening, the temperature measuring assembly further comprises a lead, one end of the lead is connected with the thermistor, the other end of the lead extends out of the second opening, and the lead is hermetically connected with the second opening.

7. The battery of claim 1, wherein the elastic member is sleeved on the housing, and one end of the elastic member abuts against the bracket and the other end abuts against the housing.

8. The battery according to claim 7, wherein a projection is provided on an outer peripheral surface of the case, the projection being adapted to abut against the elastic member.

9. The battery of claim 1, further comprising:

and the mounting component is fixed on the battery monomer, and the bracket is fixed on the mounting component.

10. The battery of claim 9, wherein one of the bracket and the mounting member is provided with a snap and the other is provided with a snap groove, and the bracket is fixed to the mounting member by the snap and the snap groove.

11. The battery according to claim 9, wherein one of the bracket and the mounting member is provided with a guide groove, and the other is provided with a guide portion, the guide portion is in insertion fit with the guide groove, and an insertion direction of the guide portion is parallel to a direction of the elastic force.

12. An electrical device comprising a battery as claimed in any one of claims 1 to 11 for providing electrical energy.