Battery cell temperature acquisition structure, battery and electric equipment

Abstract

The utility model provides a battery cell temperature acquisition structure, a battery and electric equipment, and relates to the technical field of batteries. The cell temperature acquisition structure is applied to the battery, the battery comprises at least one cell, and the cell temperature acquisition structure comprises a thermistor, a support frame, a flexible circuit board and a heat conduction assembly. The supporting frame comprises a fixing frame, the fixing frame sleeves the thermistor, the fixing frame and the thermistor are fixed on one side, deviating from the heat conduction assembly, of the flexible circuit board, and one side, deviating from the flexible circuit board, of the supporting frame is directly or indirectly connected with the first position of the battery cell. The heat conduction assembly is fixed to the side, facing the second position of the battery cell, of the flexible circuit board, the heat conduction assembly is connected with the flexible circuit board and the battery cell, and the first position and the second position are spaced. According to the battery cell temperature acquisition structure provided by the embodiment of the invention, the connection reliability between the battery cell temperature acquisition structure and the battery cell can be improved, and the possibility of damage and failure of the thermistor caused by unstable temperature acquisition is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery core temperature collection structure, a battery and an electrical device. Background Art

[0002] A battery is a device that can convert chemical energy into electrical energy, and can provide electrical energy to many electrical appliances, keeping them in working order. Existing batteries are widely used in power fields such as automobiles, engineering machinery and equipment, and ships. They can also be used for household energy storage, industrial and commercial energy storage, and communication base stations.

[0003] The battery generally includes a cell temperature collection structure. The temperature of the cell can be collected through the thermistor (Negative Temperature Coefficient, NTC) in the cell temperature collection structure, which facilitates the monitoring of the cell temperature and reduces the possibility of the cell being in a thermal runaway state. In the prior art, the cell temperature collection structure is generally fixedly connected to the battery unit contact system.

[0004] With the continuous development of batteries and the growth of market demand, batteries have begun to develop in the direction of cost reduction and optimization. The support structure in the battery contact system has begun to be gradually cancelled, resulting in a lack of support at the battery cell temperature collection structure, which in turn affects the reliability of the connection between the battery cell temperature collection structure and the battery cell, and is prone to unstable temperature collection, resulting in damage and failure of the thermistor. Utility Model Content

[0005] The present application provides a battery cell temperature collection structure, a battery and an electrical device to improve the connection reliability between the battery cell temperature collection structure and the battery cell, and reduce the possibility of damage and failure of thermistor due to unstable temperature collection.

[0006] In a first aspect, the present application example provides a battery cell temperature collection structure, which is applied to a battery. The battery includes at least one battery cell, and the battery cell temperature collection structure includes a thermistor, a support frame, a flexible circuit board, and a heat-conducting component.

[0007] The support frame includes a fixing frame, which is sleeved on the thermistor. The fixing frame and the thermistor are fixed to a side of the flexible circuit board away from the heat-conducting component. The side of the support frame away from the flexible circuit board is directly or indirectly connected to the first position of the battery cell.

[0008] The heat-conducting component is fixed on one side of the flexible circuit board facing the second position of the battery core. The heat-conducting component connects the flexible circuit board and the battery core. The first position is spaced apart from the second position.

[0009] Since the side of the support frame facing away from the flexible circuit board is connected to the first position of the battery cell, during the assembly process or use of the battery cell temperature collection structure, the first position can apply a force toward the flexible circuit board to the support frame, so that the support frame and the flexible circuit board are tightly fitted. Since the side of the flexible circuit board facing away from the support frame is connected to the second position of the battery cell through the heat-conducting component, based on the principle of force transmission, the force acting on the support frame can be transmitted to the second position via the flexible circuit board and the heat-conducting component, so that the connection between the support frame and the second position is relatively tight. In addition, since the fixed frame is sleeved on the thermistor, based on the action of the fixed frame, the connection between the thermistor and the second position can be relatively tight, reducing the possibility of damage to the thermistor due to unreliable connection, which is conducive to improving the stability and accuracy of the thermistor in collecting temperature at the second position.

[0010] On this basis, based on Newton's third law, an opposite force can be generated at the second position, which acts on the support frame and the thermistor through the heat-conducting component and the flexible circuit board, thereby making the connection between the thermistor and the second position tighter, further reducing the possibility of damage to the thermistor due to unreliable connection, and helping to further improve the temperature sampling stability and accuracy of the thermistor at the second position.

[0011] In addition, since the heat-conducting component has a certain rigidity and is arranged on the side of the flexible circuit board facing the second position, the rigidity of the flexible circuit board can be improved, thereby improving the connection reliability between the flexible circuit board and the battery cell. Since the heat-conducting component has a high thermal conductivity, the heat-conducting efficiency between the second position of the battery cell and the flexible circuit board can be improved by setting the heat-conducting component, so that the time for the temperature at the second position to reach the thermistor is shorter, thereby improving the temperature collection efficiency of the battery cell temperature collection structure.

[0012] In some possible implementations, the heat conductive assembly includes a heat conductive sheet, one side of the heat conductive sheet is fixedly connected to the flexible printed circuit board, and the other side of the heat conductive sheet is connected to the battery cell.

[0013] Since the thermal conductive sheet has a certain rigidity and is disposed on the side of the flexible circuit board facing the second position, the thermal conductive sheet can improve the rigidity of the flexible circuit board, thereby improving the connection reliability between the flexible circuit board and the battery cell.

[0014] In addition, since the thermal conductivity of the thermal conductive sheet is high, by providing the thermal conductive sheet, the thermal conductivity efficiency between the second position of the battery cell and the flexible circuit board can be improved, so that the time for the temperature at the second position to reach the thermistor is shortened, thereby improving the temperature collection efficiency of the battery cell temperature collection structure.

[0015] In some possible implementations, the heat conductive assembly further includes a heat conductive pad, which is disposed on a side of the heat conductive sheet facing the second position, and the heat conductive pad connects the heat conductive sheet and the second position.

[0016] By providing a thermal pad, the bonding reliability between the thermal conductive sheet and the battery cell can be ensured, thereby ensuring the temperature collection accuracy of the battery cell temperature collection structure.

[0017] In some possible implementations, the support frame includes a fixed section and a connecting section that are connected to each other, the fixed frame is disposed on the fixed section, and the connecting section is directly or indirectly connected to the first position.

[0018] The connection between the thermistor and the flexible printed circuit board can be achieved by setting the fixing section, and the connection between the support frame and the first position of the battery cell can be achieved by the connecting section.

[0019] In some possible implementations, the battery further includes a fixing member connected to the first position. A connecting protrusion is provided on a side of the connecting section away from the flexible circuit board, and the fixing member is provided with a connecting groove, and the connecting protrusion cooperates with the connecting groove.

[0020] The connection protrusion and the connection groove can be used to match the connection section and the fixing member. Since the connection section is part of the support frame and the fixing member is connected to the first position of the battery cell, the connection between the support frame and the first position of the battery cell can be achieved, ensuring the reliability of the connection between the support frame and the first position.

[0021] In some possible implementations, a limiting column is provided on a side of the connecting section facing away from the connecting protrusion, and a gap is provided between the limiting column and the second position.

[0022] In some possible implementations, a distance between the fixing frame and the second position is a first distance, a distance between the connecting section and the second position is a second distance, and the first distance is smaller than the second distance.

[0023] Compared with the first distance being equal to the second distance, by setting the first distance smaller than the second distance, the assembly tolerance of the flexible circuit board, the thermal conductive sheet and the thermal conductive pad can be smaller, thereby ensuring the assembly reliability among the support frame, the flexible circuit board, the thermal conductive sheet and the thermal conductive pad.

[0024] In some possible implementations, the battery core temperature collection structure may further include a filling layer, a spacing gap is provided between the thermistor and the frame wall of the fixed frame, and the filling layer is filled in the spacing gap.

[0025] Compared with the direct connection between the thermistor and the fixed frame, the gap between the thermistor and the frame wall of the fixed frame can be filled by setting the filling layer, making the connection between the thermistor and the fixed frame more reliable. And because the filling layer has a certain flexibility, compared with the direct contact between the thermistor and the fixed frame, the thermistor is in contact with the filling layer, which can reduce the possibility of damage to the thermistor after collision with the fixed frame or other structures.

[0026] The second aspect of the present application provides a battery, which includes a battery cell temperature collection structure provided in any of the above examples, and one or more battery cells, a housing is provided with a housing cavity, the battery cell is arranged in the housing cavity, and the battery cell temperature collection structure is connected to the battery cell for collecting the temperature of the battery cell.

[0027] The beneficial effects of the battery provided in the above second aspect and each possible design of the above second aspect can refer to the beneficial effects brought about by the above first aspect and each possible implementation method of the first aspect, and will not be repeated here.

[0028] A third aspect of the present application provides an electrical device, which includes the battery mentioned in the above example.

[0029] The beneficial effects of the electrical equipment provided in the third aspect and each possible design of the third aspect can be referred to the beneficial effects brought about by the second aspect and each possible implementation method of the second aspect, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the partial structure of a battery provided as an example of this application.

[0031] Figure 2 for Figure 1 A partial enlarged schematic diagram of point Ⅰ in the middle.

[0032] Figure 3 An exploded schematic diagram of the local structure of a battery provided as an example of the present application.

[0033] Figure 4 for Figure 3 A partial enlarged schematic diagram of point II in the middle.

[0034] Figure 5 A schematic diagram of the coordination between a battery cell temperature collection structure and a battery cell provided as an example in this application.

[0035] Figure 6 A schematic structural diagram of a support frame from a first perspective provided as an example in this application.

[0036] Figure 7 A schematic structural diagram of a support frame from a second perspective provided as an example in this application.

[0037] Description of reference numerals:

[0038] 100. Battery cell temperature collection structure; 110. Support frame; 111. Fixed section; 1111. Fixed frame; 112. Connecting section; 1121. Connecting protrusion; 1122. Limiting column; 120. Flexible circuit board; 130. Thermal conductive component; 131. Thermal conductive sheet; 132. Thermal conductive pad; 140. Thermistor; 150. Filling layer; 200. Fixing part; 300. Battery cell. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the examples of this application clearer, the technical solution in the examples of this application will be clearly and completely described below in conjunction with the drawings in the examples of this application. Obviously, the described examples are part of the examples of this application, not all of them. Based on the examples in this application, all other examples obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application herein are only for the purpose of describing specific examples and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.

[0041] Reference to "examples" herein means that a particular feature, structure, or characteristic described in conjunction with the examples may be included in at least one example of the present application. The appearance of the phrase "example" in various locations in the specification does not necessarily refer to the same example, nor is it an independent or alternative example that is mutually exclusive with other examples. It is explicitly and implicitly understood by those skilled in the art that the examples described herein may be combined with other examples.

[0042] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the battery cell temperature collection structure and the battery of the present application.

[0044] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0045] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0046] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a barrier, such as a fixed connection through screws, bolts or other barrier; the physical connection may also be a detachable connection, such as a mutual snap-on or snap-fit ​​connection; the physical connection may also be an integral connection, such as a connection formed by welding, bonding or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0047] A battery is a device that can provide electrical energy to electrical appliances, allowing them to be in working condition. A battery generally includes a core temperature collection structure and a shell.

[0048] In the prior art, the battery cell temperature collection structure is generally fixedly connected to the battery cell contact system. The battery cell contact system can realize high-voltage series connection or parallel connection between different battery cells, and can collect voltage and temperature of the battery cells through different components.

[0049] The battery cell temperature collection structure is fixed relative to the battery cell through a bracket in the battery unit contact system. A protrusion is provided at a local position of the bracket as a support structure, and a buffer structure is provided inside the support structure. The battery cell temperature collection structure is provided on the side of the buffer structure facing the battery cell cover. The support structure and the buffer structure cooperate to achieve a close fit between the battery internal temperature collection structure and the battery cell cover.

[0050] With the continuous development of batteries and the growth of market demand, batteries have begun to develop in the direction of cost reduction and optimization. The brackets in the battery contact system have begun to be gradually cancelled, resulting in a lack of support for the battery cell temperature collection structure, which may lead to a loose fit between the battery cell temperature collection structure and the battery cell cover, resulting in unstable temperature collection of the battery cell temperature collection structure, and even damage and failure of the thermistor.

[0051] Based on the above, the present application example provides a battery cell temperature collection structure, a battery and an electrical device.

[0052] In order to enable those skilled in the art to better understand the present application, the battery cell temperature collection structure, battery and electrical equipment provided in the example of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0053] Exemplarily, the present application example provides an electrical device, which may include a battery.

[0054] The electrical equipment uses a battery as its power source. The electrical equipment may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc.

[0055] Next, a brief introduction to the batteries mentioned in the above examples is given.

[0056] Exemplarily, the battery may include a housing, a cell temperature collection structure, and one or more cells. The housing is provided with a receiving cavity, the cell is arranged in the receiving cavity, and the cell temperature collection structure is connected to the cell to collect the temperature of the cell.

[0057] The shell can be in various structures. For example, the shell can be a cylinder, a cuboid or other cubes.

[0058] In a battery, there can be multiple cells, which can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple cells are connected in series and in parallel. Multiple cells can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple cells is accommodated in a shell. Of course, the battery can also be a battery module composed of multiple cells connected in series, in parallel, or in mixed connection, and then multiple battery modules are connected in series, in parallel, or in mixed connection to form a whole, and accommodated in a shell.

[0059] The battery may also include other structures, for example, the battery may also include a busbar component for realizing electrical connection between a plurality of battery cells. Each battery cell may be a secondary battery or a primary battery.

[0060] Next, the specific structure of the battery cell temperature collection structure is described in detail.

[0061] Exemplarily, the present application example provides a battery cell temperature collection structure, which is applied to a battery, and the battery may include at least one battery cell.

[0062] Figure 1 A schematic diagram of a partial structure of a battery provided as an example of this application, Figure 2 for Figure 1 The local enlarged schematic diagram of point Ⅰ in the middle, Figure 3 An exploded schematic diagram of a local structure of a battery provided as an example of this application, Figure 4 for Figure 3 Please refer to the partial enlarged schematic diagram of the middle II. Figure 1 to Figure 4 The battery core temperature collection structure 100 may include a thermistor 140 , a support frame 110 , a flexible printed circuit 120 (flexible printed circuit, FPC) and a heat conductive component 130 .

[0063] The support frame 110 may include a fixing frame 1111, which may be sleeved on the thermistor 140. The fixing frame 1111 and the thermistor 140 are fixed to a side of the flexible circuit board 120 away from the heat conductive component 130. The side of the support frame 110 away from the flexible circuit board 120 is directly or indirectly connected to the first position of the battery cell 300.

[0064] The heat conducting component 130 is fixed to a side of the thermistor 140 facing the second position of the battery cell 300 . The heat conducting component 130 connects the flexible circuit board 120 and the battery cell 300 . The first position is spaced apart from the second position.

[0065] The first position of the battery cell 300 may be at an electrode or other position of the battery cell 300, and the second position of the battery cell 300 may be at a shell of the battery cell 300. As long as the first position is spaced from the second position and the thermistor 140 can accurately collect the temperature of the battery cell 300 from the second position of the battery cell 300, it is convenient for operators to monitor the temperature of the battery cell 300.

[0066] The thermistor 140 can be fixed on the side of the flexible circuit board 120 away from the heat conductive component 130, and can be fixed on the flexible circuit board 120 by integration, welding or other methods. The thermistor 140 mentioned in the example of this application is similar to the thermistor 140 in the prior art, and the thermistor 140 is not described in detail here.

[0067] The support frame 110 can be made of a material with anti-stretching ability, for example, plastic or synthetic plastic, synthetic rubber, resin-based composite materials, glass fiber reinforced PC or other insulating materials with anti-stretching ability. The example of this application does not impose any specific restrictions on the material of the support frame 110.

[0068] The side of the support frame 110 facing away from the flexible circuit board 120 can be directly connected to the first position of the battery cell 300, or the support frame 110 can be connected to the first position of the battery cell 300 through other structures in the battery to limit the position of the support frame 110 relative to the battery cell 300.

[0069] The support frame 110 may be integrally formed. The support frame 110 may also be formed by combining a plurality of structural members. For example, the support frame 110 may include a fixing frame 1111 and a connecting structure. The connecting structure may be connected to the first position. The fixing frame 1111 and the connecting structure may be connected together by snapping, anchoring or other means. The example of this application does not limit the specific forming method of the support frame 110. The following description will only take the support frame 110 as an integrally formed one as an example.

[0070] The shape of the fixing frame 1111 can be the same as that of the thermistor 140, or different from that of the thermistor 140. The fixing frame 1111 can be a rectangular frame, a circular frame, or a frame of other shapes. The example of the present application does not impose any specific restrictions on the shape of the fixing frame 1111, as long as the fixing frame 1111 can be mounted on the outer peripheral side of the thermistor 140 to reduce the possibility of damage to the flexible circuit board 120.

[0071] The fixing frame 1111 can be sleeved on the thermistor 140 and bonded to the side of the flexible circuit board 120 away from the heat conductive component 130 , or the fixing frame 1111 can also be fixed to the side of the flexible circuit board 120 away from the heat conductive component 130 in other ways.

[0072] A heat conducting component 130 is disposed on one side of the flexible circuit board 120 facing the battery cell 300. The shape of the heat conducting component 130 may be the same as that of the thermistor 140, and the shape of the heat conducting component 130 may also be the same as that of the fixing frame 1111. The area of ​​the heat conducting component 130 may be greater than, less than, or equal to that of the thermistor 140.

[0073] The heat conducting component 130 may have a certain rigidity, and the heat conducting component 130 may be made of a metal sheet or other heat conducting materials with good heat conducting properties. For example, the heat conducting component 130 may be made of aluminum or an aluminum alloy, or copper or a copper alloy, or other heat conducting materials with good heat conducting properties. The example of this application does not limit the specific implementation of the heat conducting component 130.

[0074] Based on the above, since the side of the support frame 110 away from the flexible circuit board 120 is connected to the first position of the battery cell 300, during the assembly process or use of the battery cell temperature collection structure 100, the first position can apply a force toward the flexible circuit board 120 to the support frame 110, so that the support frame 110 and the flexible circuit board 120 are closely fitted. Since the side of the flexible circuit board 120 away from the support frame 110 is connected to the second position of the battery cell 300 through the heat conductive component 130, based on the principle of force transmission, the force acting on the support frame 110 can be transmitted to the second position via the flexible circuit board 120 and the heat conductive component 130, so that the connection between the support frame 110 and the second position is relatively tight. In addition, since the fixing frame 1111 is sleeved on the thermistor 140, based on the action of the fixing frame 1111, the connection between the thermistor 140 and the second position can be relatively tight, reducing the possibility of damage to the thermistor 140 due to unreliable connection, which is conducive to improving the temperature collection stability and accuracy of the thermistor 140 at the second position.

[0075] On this basis, based on Newton's third law, an opposite force can be generated at the second position, which acts on the support frame 110 and the thermistor 140 through the heat-conducting component 130 and the flexible circuit board 120, thereby making the connection between the thermistor 140 and the second position tighter, further reducing the possibility of damage to the thermistor 140 due to unreliable connection, and is conducive to further improving the temperature sampling stability and accuracy of the thermistor 140 at the second position.

[0076] In addition, since the heat-conducting component 130 has a certain rigidity and is disposed on the side of the flexible circuit board 120 facing the second position, the rigidity of the flexible circuit board 120 can be improved, thereby improving the connection reliability between the flexible circuit board 120 and the battery cell 300. Since the heat-conducting component 130 has a high thermal conductivity, the heat-conducting efficiency between the second position of the battery cell 300 and the flexible circuit board 120 can be improved by providing the heat-conducting component 130, so that the time for the temperature at the second position to reach the thermistor 140 is shorter, thereby improving the temperature collection efficiency of the battery cell temperature collection structure 100.

[0077] Based on the battery core temperature acquisition structure 100 provided in the above example, Figure 5 A schematic diagram of the cooperation between a battery cell temperature collection structure and a battery cell provided for this application example, please refer to Figure 5 The battery core temperature collection structure 100 may further include a filling layer 150 . A spacing gap is provided between the thermistor 140 and the frame wall of the fixing frame 1111 , and the filling layer 150 is filled in the spacing gap.

[0078] The geometric center of the thermistor 140 can overlap with the geometric center of the fixed frame 1111, and a certain distance can be maintained between the geometric center of the thermistor 140 and the geometric center of the fixed frame 1111. The example of the present application does not make any specific limitation on this, as long as there is a gap between the outer wall of the thermistor 140 and the inner wall of the fixed frame 1111.

[0079] The filling layer 150 may be made of curing glue or other materials that can achieve fixed connection between the fixing frame 1111 and the thermistor 140 , and the filling layer 150 may also have a certain degree of flexibility.

[0080] As described above, compared with the direct connection between the thermistor 140 and the fixing frame 1111, the gap between the thermistor 140 and the frame wall of the fixing frame 1111 can be filled by providing the filling layer 150, so that the connection between the thermistor 140 and the fixing frame 1111 is more reliable. And because the filling layer 150 has a certain degree of flexibility, compared with the direct contact between the thermistor 140 and the fixing frame 1111, the thermistor 140 and the filling layer 150 are in contact, which can reduce the possibility of damage to the thermistor 140 after collision with the fixing frame 1111 or other structures.

[0081] Based on the battery cell temperature acquisition structure 100 provided in the above example, please refer to Figure 4 and Figure 5 The heat-conducting component 130 may include a heat-conducting sheet 131 , one side of the heat-conducting sheet 131 is fixedly connected to the flexible circuit board 120 , and the other side of the heat-conducting sheet 131 is connected to the battery cell 300 .

[0082] The heat conducting sheet 131 may be made of a conductive material with high thermal conductivity, such as aluminum or aluminum alloy, copper or copper alloy or other materials. The present application example does not limit the material of the heat conducting sheet 131 .

[0083] One side of the thermal conductive sheet 131 can be fixedly connected to the flexible circuit board 120 by bonding, welding or other connecting methods, and the other side of the thermal conductive sheet 131 can be connected to the second position by bonding, welding or other connecting methods. The example of this application does not specifically limit the connection method between the thermal conductive sheet 131 and other structures.

[0084] As described above, since the thermal conductive sheet 131 has a certain rigidity and is disposed on the side of the flexible circuit board 120 facing the second position, the thermal conductive sheet 131 can improve the rigidity of the flexible circuit board 120, thereby improving the connection reliability between the flexible circuit board 120 and the battery cell 300.

[0085] In addition, since the thermal conductivity of the thermal conductive sheet 131 is relatively high, by providing the thermal conductive sheet 131, the thermal conductivity efficiency between the second position of the battery cell 300 and the flexible circuit board 120 can be improved, so that the time for the temperature at the second position to reach the thermistor 140 is shortened, thereby improving the temperature collection efficiency of the battery cell temperature collection structure 100.

[0086] Based on the battery cell temperature acquisition structure 100 provided in the above example, please refer to Figure 4 and Figure 5 The heat-conducting assembly 130 may further include a heat-conducting pad 132 , which is disposed on a side of the heat-conducting sheet 131 facing the second position, and the heat-conducting pad 132 connects the heat-conducting sheet 131 and the second position.

[0087] The thermal pad 132 can be made of thermally conductive gel, thermally conductive silicone or other materials with a certain viscosity, as long as the thermal pad 132 can fix and bond the thermally conductive sheet 131 to the battery cell 300 and ensure the bonding reliability between the thermally conductive sheet 131 and the battery cell 300.

[0088] By providing the thermal pad 132 , the bonding reliability between the thermal conductive sheet 131 and the battery cell 300 can be ensured, thereby ensuring the temperature collection accuracy of the battery cell temperature collection structure 100 .

[0089] In addition, during the assembly of the battery cell temperature collection structure 100 and the battery cell 300 , a protective layer such as release paper or other protective structure may be bonded to the side of the thermal pad 132 away from the thermal conductive sheet 131 , and the release paper may be recycled.

[0090] The protective layer can reduce the possibility of the thermal pad 132 being contaminated by impurities such as dust, water, and oil, further ensuring the connection reliability between the thermal pad 132 and the battery cell 300, and further ensuring the connection reliability between the thermal conductive sheet 131 and the battery cell 300.

[0091] Based on the battery cell temperature collection structure 100 provided in the above example, a protective layer may also be provided at the support frame 110 away from the second position, such as release paper or other protective structures, which can reduce the possibility of the support frame 110 being contaminated by impurities such as dust, water, and oil, and further ensure the connection reliability between the support frame 110 and the thermistor 140.

[0092] The battery core temperature collection structure 100 can also be provided with two protective layers at the same time, one protective layer is provided on the side of the thermal pad 132 away from the thermal conductive sheet 131, and the other protective layer is provided on the side of the support frame 110 away from the second position. This application example does not limit this.

[0093] Based on the battery core temperature acquisition structure 100 provided in the above example, Figure 6 For a structural diagram of a support frame from a first perspective provided for this application example, please refer to Figure 6 The support frame 110 may include a fixed section 111 and a connecting section 112 connected to each other, the fixed frame 1111 is disposed on the fixed section 111, and the connecting section 112 is directly or indirectly connected to the first position.

[0094] The fixing frame 1111 may be disposed on the fixing section 111 , and a side of the fixing section 111 facing the flexible circuit board 120 is connected to the flexible circuit board 120 , so as to achieve a fixed connection between the fixing section 111 and the flexible circuit board 120 .

[0095] The connecting section 112 can be directly or indirectly connected to the first position of the battery cell 300 by bonding, threaded connection, riveting, snap connection, hole-shaft matching, etc.

[0096] As described above, the thermistor 140 can be connected to the flexible circuit board 120 by providing the fixing section 111 , and the support frame 110 can be connected to the first position of the battery cell 300 by the connecting section 112 .

[0097] Based on the battery core temperature acquisition structure 100 provided in the above example, Figure 7 For a structural diagram of a second perspective of a support frame provided for this application example, please refer to Figure 5 and Figure 7The battery may further include a fixing member 200, which is connected to the first position. A connecting protrusion 1121 is provided on the side of the connecting section 112 away from the flexible circuit board 120, and the fixing member 200 is provided with a connecting groove, and the connecting protrusion 1121 cooperates with the connecting groove.

[0098] The fixing member 200 may be a tab or other structure in the battery, and the present application example is described by taking the fixing member 200 as a tab as an example. The tab may be used to connect multiple cells 300 in the battery in series, in parallel, or in mixed series.

[0099] At least one connecting protrusion 1121 may be provided, or a plurality of connecting protrusions 1121 may be provided at intervals. The connecting protrusion 1121 may be a convex column, a boss or other convex structure, the shape of the connecting groove is adapted to the shape of the connecting protrusion 1121, and the number of the connecting grooves is equal to the number of the connecting protrusions 1121 and corresponds one to one.

[0100] Exemplarily, when the connection protrusion 1121 is a protruding column, the connection groove may be a blind hole or a through hole. If the connection groove is a through hole, the connection protrusion 1121 and the connection groove are connected together by melting.

[0101] As described above, the connection protrusion 1121 cooperates with the connection groove to achieve the connection between the connection section 112 and the fixing member 200. Since the connection section 112 is a part of the support frame 110, and the fixing member 200 is connected to the first position of the battery cell 300, the connection between the support frame 110 and the first position of the battery cell 300 can be achieved, thereby ensuring the connection reliability between the support frame 110 and the first position.

[0102] Based on the battery cell temperature acquisition structure 100 provided in the above example, please refer to Figure 6 A limiting column 1122 is provided on the side of the connecting section 112 away from the connecting protrusion 1121, and a gap is provided between the limiting column 1122 and the second position.

[0103] When there is a force acting on the support frame 110 toward the second position, by setting a gap between the limiting column 1122 and the second position, the support frame 110 can be deformed toward the second position, making the connection between the second position of the battery cell 300 and the thermistor 140 tighter.

[0104] The rated force that the support frame 110 can withstand varies based on the different materials and specifications of the support frame 110. To ensure the reliability of the battery core temperature collection structure 100, the force applied to the support frame 110 should be less than or equal to the rated force, for example, less than or equal to 100N.

[0105] The gap between the limiting column 1122 and the second position can be greater than 0 and less than 0.5 mm. Based on this, the possibility of excessive deformation of the connecting section 112 toward the second position, which may cause damage to the support frame 110, can be reduced.

[0106] Based on the battery core temperature acquisition structure 100 provided in the above example, the distance between the fixing frame 1111 and the second position is the first distance D1, the distance between the connecting section 112 and the second position is the second distance D2, and the first distance D1 is smaller than the second distance D2.

[0107] Compared with the first distance D1 being equal to the second distance D2, by setting the first distance D1 to be smaller than the second distance D2, the assembly tolerance of the flexible circuit board 120, the thermal conductive sheet 131 and the thermal conductive pad 132 can be made smaller, thereby ensuring the assembly reliability among the support frame 110, the flexible circuit board 120, the thermal conductive sheet 131 and the thermal conductive pad 132.

[0108] Finally, it should be noted that the above embodiments are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A battery cell temperature collection structure, applied to a battery, wherein the battery comprises at least one battery cell, characterized in that: The battery core temperature collection structure includes a thermistor, a support frame, a flexible circuit board and a heat conducting component; The support frame includes a fixing frame, the fixing frame is sleeved on the thermistor, the fixing frame and the thermistor are fixed to a side of the flexible circuit board away from the heat-conducting component, and the side of the support frame away from the flexible circuit board is directly or indirectly connected to the first position of the battery cell; The heat-conducting component is fixed to a side of the flexible circuit board facing the second position of the battery cell, the heat-conducting component connects the flexible circuit board and the battery cell, and the first position is spaced apart from the second position.

2. The battery core temperature collection structure according to claim 1, characterized in that: The heat-conducting component comprises a heat-conducting sheet, one side of which is fixedly connected to the flexible circuit board, and the other side of which is connected to the battery core.

3. The battery core temperature collection structure according to claim 2, characterized in that: The heat-conducting assembly further includes a heat-conducting pad, which is disposed on a side of the heat-conducting sheet facing the second position, and the heat-conducting pad connects the heat-conducting sheet and the second position.

4. The battery core temperature collection structure according to any one of claims 1 to 3, characterized in that: The support frame includes a fixed section and a connecting section connected to each other, the fixed frame is arranged on the fixed section, and the connecting section is directly or indirectly connected to the first position.

5. The battery core temperature collection structure according to claim 4, characterized in that: The battery further includes a fixing member connected to the first position; A connecting protrusion is provided on a side of the connecting section facing away from the flexible circuit board, and a connecting groove is provided on the fixing member, and the connecting protrusion cooperates with the connecting groove.

6. The battery core temperature collection structure according to claim 5, characterized in that: A limiting column is provided on a side of the connecting section away from the connecting protrusion, and a gap is provided between the limiting column and the second position.

7. The battery core temperature collection structure according to claim 4, characterized in that: The distance between the fixing frame and the second position is a first distance, the distance between the connecting section and the second position is a second distance, and the first distance is smaller than the second distance.

8. The battery core temperature collection structure according to claim 1, characterized in that: The battery core temperature collection structure further includes a filling layer. A spacing gap is provided between the thermistor and the frame wall of the fixing frame, and the filling layer is filled in the spacing gap.

9. A battery, characterized in that: It comprises the battery cell temperature collection structure as described in any one of claims 1 to 8, a shell and one or more battery cells, the shell is provided with a receiving cavity, the battery cell is arranged in the receiving cavity, and the battery cell temperature collection structure is connected to the battery cell for collecting the temperature of the battery cell.

10. An electrical device, characterized in that: A battery comprising the battery of claim 9.

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