Battery capable of monitoring core temperature of battery cell

Abstract

The utility model discloses a battery capable of monitoring the temperature of the core part of a battery cell, which comprises a battery body, the battery body comprises a shell and the battery cell, the battery body is provided with at least two tabs, the core part of the battery cell is provided with a temperature measuring point, and the temperature measuring point is provided with a heat-sensitive material for measuring the temperature. And at least one tab is connected with the heat-sensitive material. According to the battery capable of monitoring the temperature of the core part of the battery cell, the temperature measuring point is arranged at the core part of the battery cell, the heat-sensitive material is arranged at the temperature measuring point, and the heat-sensitive material is connected with the tab on the battery body, so that the temperature of the core part of the battery cell measured by the heat-sensitive material can be acquired through the tab; therefore, the core temperature of the battery cell can be monitored in real time, and the operation safety of the battery is improved.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically a battery that can monitor the temperature of the core of the battery cell. Background Technology

[0002] In existing technologies, infrared temperature sensors are generally used to detect the temperature of battery cells in real time. While this can meet the technical objective of real-time temperature monitoring to some extent, it can only monitor the surface temperature of the cell. If the cell is thick, it cannot meet the requirement of real-time monitoring of the internal temperature. The internal temperature of the cell cannot dissipate heat in time, often resulting in a higher temperature than the surface. Therefore, without monitoring the internal temperature of the cell, it is impossible to monitor the safe operating status of energy storage devices.

[0003] To improve the operational safety of battery cells, existing technologies involve making the cells more elongated and flattened within a certain volume, which has the advantages of increasing battery energy density and increasing the heat dissipation area of ​​the cell. While the elongated and flattened design can improve the heat dissipation area and operational safety to some extent, if the cell is thick, the problem of not being able to monitor the internal temperature in real time still exists. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to provide a battery that can monitor the temperature of the core of the battery cell in real time, so as to improve the safety of battery operation.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A battery capable of monitoring the core temperature of a battery cell includes a battery body, the battery body comprising a casing and a battery cell, the battery body having at least two tabs, the core of the battery cell having a temperature measuring point, the temperature measuring point having a thermistor material for temperature measurement, and at least one tab being connected to the thermistor material.

[0007] Furthermore, the battery cell includes a current collector and a battery active material coated on the current collector, and the temperature measuring point is located on the current collector.

[0008] Furthermore, when the battery active material is coated on both sides of the current collector, the temperature measuring point is set between the battery active material and the current collector; when the battery active material is coated on only one side of the current collector, the temperature measuring point is set on the other side of the current collector where the battery active material is not coated.

[0009] Furthermore, a temperature measuring zone is provided in the middle of the current collector, and the temperature measuring point is located within the temperature measuring zone.

[0010] Furthermore, at least one temperature measuring point is distributed within the temperature measuring area, and each temperature measuring point is provided with the thermosensitive material, which is connected to the corresponding tab.

[0011] Furthermore, the current collector is provided with a first inner electrode tab, and a connecting line arranged on the current collector is provided between the temperature measuring point and the first inner electrode tab. The connecting line is used to connect the first inner electrode tab and the corresponding temperature measuring point.

[0012] Furthermore, the battery cell is a multilayer battery cell, and the current collector spacing is set to at least three.

[0013] Furthermore, all of the current collectors are provided with the temperature measuring point; or, there is at least one current collector without the temperature measuring point between two adjacent current collectors provided with the temperature measuring point.

[0014] Furthermore, the electrode tab includes at least one positive electrode tab and at least one negative electrode tab, and at least one of the positive electrode tabs and / or at least one of the negative electrode tabs are connected to the thermosensitive material.

[0015] Furthermore, the positive electrode tab and the negative electrode tab are arranged along the length or height direction of the battery body.

[0016] Furthermore, the electrode tab includes at least one positive electrode tab, at least one negative electrode tab, and at least one temperature-sensing electrode tab, and the thermosensitive material is connected to the temperature-sensing electrode tab.

[0017] Furthermore, the positive electrode tab, the negative electrode tab, and the temperature measuring tab are arranged along the length or height direction of the battery body.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention relates to a battery capable of monitoring the temperature at the core of a battery cell. By setting a temperature measuring point at the core of the cell and placing a thermistor at the measuring point, and by connecting the thermistor to the tabs on the battery body, the temperature at the core of the cell, measured by the thermistor, can be collected through the tabs. This allows for real-time monitoring of the core temperature of the cell, thereby improving the safety of battery operation.

[0020] Note: In this application, "core of the battery cell" refers to the inside of the battery cell. Attached Figure Description

[0021] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0022] Figure 1 This is a schematic diagram of the first embodiment of the battery that can monitor the temperature of the core of the battery cell according to the present invention.

[0023] Figure 2 for Figure 1 The left view;

[0024] Figure 3 for Figure 1 A schematic diagram of the electrode structure of the battery shown.

[0025] Figure 4 This is a schematic diagram of the second embodiment of the battery that can monitor the temperature of the core of the battery cell according to the present invention.

[0026] Figure 5 This is a schematic diagram of the third embodiment of the battery that can monitor the temperature of the core of the battery cell according to the present invention.

[0027] Figure 6 This is a schematic diagram of the fourth embodiment of the battery that can monitor the temperature of the core of the battery cell according to the present invention.

[0028] Figure 7 This is a schematic diagram of the fifth embodiment of the battery that can monitor the temperature of the core of the battery cell according to the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10-Battery body; 11-Casing; 12-Cell; 121-Current collector; 122-Battery active material; 123-Temperature measuring area; 124-First inner tab; 13-Temperature measuring point; 131-Connecting wire; 14-Positive tab; 15-Negative electrode mechanism; 16-Temperature measuring tab. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0032] like Figure 1-3 As shown, this embodiment of a battery capable of monitoring the core temperature of a battery cell includes a battery body 10, which includes a casing 11 and a battery cell 12. The battery body 10 has at least two tabs, and the core of the battery cell has a temperature measuring point 13. Each temperature measuring point 13 is equipped with a thermistor material for temperature measurement, and at least one tab is connected to the thermistor material 13. The number of temperature measuring points 13 in the core of the battery cell is at least one. Specifically, the number of temperature measuring points 13 is set according to the size of the battery cell and the internal temperature distribution of the battery cell, etc., to achieve effective monitoring of the core temperature of the battery cell.

[0033] Specifically, the electrode tabs include at least one positive electrode tab 14, at least one negative electrode tab 15, and at least one temperature sensing tab 16, with the thermosensitive material connected to the temperature sensing tab 16. The positive electrode tab 14, negative electrode tab 15, and temperature sensing tab 16 are arranged along the length or height direction of the battery body 10.

[0034] like Figure 1 As shown, in the first embodiment of the battery that can monitor the temperature of the core of the battery cell, the tabs include a positive tab 14, a negative tab 15 and a temperature measuring tab 16. The positive tab 14, the negative tab 15 and the temperature measuring tab 16 are all disposed on the side of the battery body 10 along the length direction.

[0035] like Figure 4 As shown, in the second embodiment of the battery that can monitor the temperature of the core of the battery cell, the tabs include a positive tab 14, a negative tab 15 and a temperature measuring tab 16. The positive tab 14 and the negative tab 15 are respectively disposed on two end faces of the battery body 10 along the width direction, while the temperature measuring tab 16 is disposed on one end face of the battery body 10.

[0036] like Figure 5 As shown, in the third embodiment of the battery that can monitor the temperature of the core of the battery cell, the tabs include a positive tab 14, a negative tab 15, and two temperature measuring tabs 16. The positive tab 14 and the negative tab 15 are respectively disposed on the two end faces of the battery body 10 along the width direction, and the two temperature measuring tabs 16 are respectively disposed on the two end faces of the battery body 10. The thermal material of each temperature measuring point 13 is selected to be connected to the temperature measuring tab 16 that is closer to it.

[0037] like Figure 6 As shown, in the fourth embodiment of the battery that can monitor the temperature of the core of the battery cell, the tabs include two positive tabs 14, two negative tabs 15, and two temperature measuring tabs 16. The positive tabs 14 and negative tabs 15 are respectively disposed on two sides of the battery body 10 along the length direction; the two temperature measuring tabs 16 are respectively disposed on two sides of the battery body 10. The thermal material of each temperature measuring point 13 is selected to be connected to the temperature measuring tab 16 that is closer to it.

[0038] The quantity and arrangement of the positive electrode tab 14, negative electrode tab 15, and temperature sensing tab 16 have been described above. However, the quantity and arrangement of the positive electrode tab 14, negative electrode tab 15, and temperature sensing tab 16 are not limited to the above methods. Specifically, the quantity and arrangement of the positive electrode tab 14, negative electrode tab 15, and temperature sensing tab 16 can be flexibly set according to the actual application scenario, such as the size of the battery body, and will not be elaborated further.

[0039] Of course, in some other embodiments, the tabs include at least one positive tab 14 and at least one negative tab 15, at least one positive tab 14 and / or at least one negative tab 15 are connected to the thermistor material 13, and the positive tab 14 and negative tab 15 are arranged along the length or height direction of the battery body 10. Figure 7 As shown, in the fifth embodiment of the battery capable of monitoring the core temperature of the battery cell, the tabs include a positive tab 14 and a negative tab 15. The thermistor material at each temperature measuring point 13 is connected to the positive tab 14 or negative tab 15 that is closest to it. Specifically, as can be seen from the foregoing content of this embodiment, similarly, in this embodiment, the number and arrangement of the positive tab 14 and negative tab 15 can be flexibly set according to the actual application scenario, such as the size of the battery body, and will not be elaborated further. The thermistor materials at different temperature measuring points 13 can be connected to the positive tab 14 and negative tab 15 closest to that temperature measuring point, or the thermistor materials at all temperature measuring points 13 can be concentrated and connected to a single positive tab 14 and negative tab 15.

[0040] Specifically, such as Figure 1-3 As shown, the battery cell 12 includes a current collector 121 and a battery active material 122 coated on the current collector 121, with a temperature measuring point 13 disposed on the current collector 121. Specifically, when the battery active material 122 is coated on both sides of the current collector 121, the temperature measuring point 13 is disposed between the battery active material 122 and the current collector 121; when the current collector 121 is coated with the battery active material 122 on only one side, the temperature measuring point 13 is disposed on the other side of the current collector 121 where the battery active material 122 is not coated.

[0041] like Figure 3 As shown, in this embodiment, a temperature measuring zone 123 is provided in the middle of the current collector 121, and temperature measuring points 13 are set in the temperature measuring zone 123. Specifically, in order to more accurately monitor the temperature of the core of the battery cell, in a preferred embodiment of this embodiment, at least one temperature measuring point 13 is distributed in the temperature measuring zone 123, and each temperature measuring point 13 is provided with a thermistor material, which is connected to the corresponding tab.

[0042] like Figure 3As shown, in a preferred embodiment of this example, the current collector 121 is provided with a first inner tab 124, and a connecting line 131 arranged on the current collector 121 is provided between the temperature measuring point 13 and the first inner tab 124. The connecting line 131 is used to connect the first inner tab 124 and the corresponding temperature measuring point 13. Specifically, when the thermosensitive materials of all temperature measuring points 13 are concentrated on one tab, the first inner tab 124 is set as one and is set close to the location of the tab. When the thermosensitive materials of different temperature measuring points 13 are connected to different tabs respectively, the first inner tab 124 is set in a one-to-one correspondence with the tabs connecting the thermosensitive materials, and the first inner tab 124 is set close to the corresponding tab.

[0043] like Figure 1 As shown, in this embodiment, the battery cell 12 is a laminated battery cell, and the current collectors 121 are spaced at least three times. In some embodiments, temperature measuring points 13 can be provided on all current collectors 121. In other embodiments, the temperature measuring points 13 can be arranged on some current collectors 121, in which case there is at least one current collector 121 without a temperature measuring point 13 between two adjacent current collectors 121 with temperature measuring points 13. Figure 1 As shown, there is a spacer 121 without a temperature measuring point 13 between two adjacent current collectors 121 with temperature measuring points 13.

[0044] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A battery capable of monitoring the core temperature of a battery cell, characterized in that: The battery includes a battery body, which includes a casing and a battery cell. The battery body has at least two tabs, and the battery cell has a temperature measuring point at its core. The temperature measuring point is provided with a thermistor material for temperature measurement, and at least one of the tabs is connected to the thermistor material.

2. The battery capable of monitoring the core temperature of the battery cell according to claim 1, characterized in that: The battery cell includes a current collector and a battery active material coated on the current collector, and the temperature measuring point is located on the current collector.

3. The battery capable of monitoring the core temperature of the battery cell according to claim 2, characterized in that: When the current collector is coated with the battery active material on both sides, the temperature measuring point is set between the battery active material and the current collector; when the current collector is coated with the battery active material on only one side, the temperature measuring point is set on the other side of the current collector that is not coated with the battery active material.

4. The battery capable of monitoring the core temperature of the battery cell according to claim 2, characterized in that: The current collector has a temperature measuring zone in the middle, and the temperature measuring point is located in the temperature measuring zone.

5. The battery capable of monitoring the core temperature of the battery cell according to claim 4, characterized in that: At least one temperature measuring point is distributed within the temperature measuring area, and each temperature measuring point is provided with the thermosensitive material, which is connected to the corresponding electrode tab.

6. The battery capable of monitoring the core temperature of the battery cell according to claim 5, characterized in that: The current collector is provided with a first inner electrode tab, and a connecting line is provided between the temperature measuring point and the first inner electrode tab on the current collector. The connecting line is used to connect the first inner electrode tab and the corresponding temperature measuring point.

7. The battery capable of monitoring the core temperature of a battery cell according to any one of claims 2-6, characterized in that: The battery cell is a multilayer battery cell, and the current collector spacing is set to at least three.

8. The battery capable of monitoring the core temperature of the battery cell according to claim 7, characterized in that: All of the current collectors are provided with the temperature measuring point; or, there is at least one current collector without the temperature measuring point between two adjacent current collectors provided with the temperature measuring point.

9. The battery capable of monitoring the core temperature of the battery cell according to claim 1, characterized in that: The electrode tab includes at least one positive electrode tab and at least one negative electrode tab, and at least one of the positive electrode tabs and / or at least one of the negative electrode tabs are connected to the thermosensitive material.

10. The battery capable of monitoring the core temperature of the battery cell according to claim 9, characterized in that: The positive and negative electrode tabs are arranged along the length or height of the battery body.

11. The battery capable of monitoring the core temperature of the battery cell according to claim 1, characterized in that: The electrode tab includes at least one positive electrode tab, at least one negative electrode tab, and at least one temperature sensing electrode tab, and the thermosensitive material is connected to the temperature sensing electrode tab.

12. The battery capable of monitoring the core temperature of the battery cell according to claim 11, characterized in that: The positive electrode tab, negative electrode tab, and temperature measuring tab are arranged along the length or height of the battery body.

Images