Lithium battery temperature detection device and detection method

Abstract

The present invention provides a lithium battery temperature detection device and a detection method. The lithium battery temperature detection device comprises: a base (10); an upper cover (20), wherein the upper cover (20) and the base (10) are arranged to form a receiving cavity, and the receiving cavity is used to receive a lithium battery (30) to be detected and an electrolyte; a support base (40), wherein the support base (40) is arranged in the base (10), and the support base (40) is used to support the lithium battery (30). At least one of the base (10) and the upper cover (20) is provided with a wiring structure (50) for passing a temperature test line. By adopting the technical solution of the present application, the temperature inside the lithium battery (30) can be detected, thereby solving the problem of difficulty in detecting the temperature inside the lithium battery (30) in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery detection, and in particular to a lithium battery temperature detection device and detection method. Background Art

[0002] Lithium batteries are sealed components, and their internal temperature is difficult to measure. In the existing technology, the temperature of lithium batteries is measured by fixing temperature lines on the series and parallel aluminum bars of the lithium batteries to measure the temperature data of the lithium batteries during charging and discharging. However, this method can only measure the local temperature outside the battery.

[0003] Currently, no effective solution has been proposed to the above-mentioned problem of difficulty in detecting the internal temperature of lithium batteries. Summary of the Invention

[0004] The main purpose of the present invention is to provide a lithium battery temperature detection device and detection method to solve the problem of difficulty in detecting the internal temperature of a lithium battery in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a lithium battery temperature detection device is provided, comprising: a base; an upper cover, the upper cover and the base are arranged to form a accommodating cavity, the accommodating cavity is used to accommodate the lithium battery and electrolyte to be detected; a support seat, the support seat is arranged in the base, the support seat is used to support the lithium battery, and at least one of the base and the upper cover is provided with a routing structure for allowing the temperature test line to pass through.

[0006] Furthermore, the support base includes: a support body, and a limiting recess is provided on a side of the support body facing the upper cover.

[0007] Furthermore, the surface of the limiting recess is arranged to cooperate with the outer surface of the lithium battery.

[0008] Furthermore, the base includes: a base body, the base body is provided with a first accommodating cavity, the support seat is arranged in the first accommodating cavity, the first end of the base body is provided with a first notch, the second end of the base body is provided with a second notch, and the first accommodating cavity is used to accommodate electrolyte.

[0009] Furthermore, the upper cover includes: an upper cover body, the upper cover body has a second accommodating cavity, a third notch is provided at the first end of the upper cover body, a fourth notch is provided at the second end of the upper cover body, the second accommodating cavity and the first accommodating cavity form an accommodating cavity, the first notch and the third notch cooperate to form a first pole through hole, the second notch and the fourth notch cooperate to form a second pole through hole, and the wiring structure is opened on the side wall of at least one of the first accommodating cavity and the second accommodating cavity.

[0010] Furthermore, the lithium battery temperature detection device also includes a sealing ring, a sealing ring is provided at each of the first pole through hole and the second pole through hole, an annular groove is provided on the outer peripheral surface of the sealing ring, the hole walls of the first pole through hole and the second pole through hole extend into the annular groove, and the inner circle of the sealing ring is sleeved on the pole of the lithium battery.

[0011] Furthermore, a first lug is provided on the surface of the base, and there are multiple first lugs, and the multiple first lugs are arranged at intervals along the circumference of the base. A second lug is provided on the surface of the upper cover, and there are multiple second lugs, and the multiple second lugs are arranged one-to-one corresponding to the multiple first lugs, and the correspondingly arranged first lugs and second lugs are connected by a connecting piece.

[0012] According to another aspect of the present invention, a temperature detection method for a lithium battery is provided, which adopts the above-mentioned lithium battery temperature detection device, and the method includes the following steps: placing a battery cell to be detected in an environment with a humidity of a first preset value to perform a first short-circuit test to obtain a first qualified battery cell; welding the electrode plate to the first qualified battery cell and performing a second short-circuit test to obtain a second qualified battery cell; placing the second qualified battery cell in an environment with a humidity of a second preset value to weigh it, placing the weighed second qualified battery cell in a container containing an electrolyte and letting it stand for a first preset time, wherein the ambient temperature of the container is the first preset temperature; after the first preset time, weighing the second qualified battery cell again to obtain a third qualified battery cell; placing the third qualified battery cell in the accommodating cavity of the lithium battery temperature detection device to perform temperature detection operation, and the lithium battery temperature detection device is the above-mentioned lithium battery temperature detection device.

[0013] Furthermore, the third qualified battery cell is placed in the accommodating chamber of the lithium battery temperature detection device for temperature detection operation, including: respectively sleeve the sealing ring on the pole of the third qualified battery cell, connect the temperature test line to the pole plate of the third qualified battery cell and pass through the first pole through hole and the second pole through hole to electrically connect with the external detection equipment; pour the electrolyte at the bottom of the accommodating chamber and cover it with the upper cover; connect the formation equipment and perform formation activation under a second preset temperature environment; when the third qualified battery cell is left to stand for the second preset time and the temperature of the third qualified battery cell is at room temperature, perform a multi-rate detection operation on the third qualified battery cell.

[0014] Furthermore, the third qualified battery cell is placed in the accommodating cavity of the lithium battery temperature detection device for temperature detection operation, including: connecting the temperature test line to the electrode plate and adapter board of the third qualified battery cell respectively and passing through the wiring structure to electrically connect with the external detection equipment.

[0015] By applying the technical solution of the present invention, a accommodating cavity is formed by the base and the upper cover to accommodate the lithium battery and the electrolyte, a support base for supporting the lithium battery is provided in the base, and a wiring structure is opened on at least one of the base and the upper cover. A new type of lithium battery temperature detection device is provided, which can detect the temperature inside the lithium battery, solving the problem of difficulty in detecting the internal temperature of the lithium battery in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It shows a structural schematic diagram of a first embodiment of a lithium battery temperature detection device according to the present invention;

[0018] Figure 2 A structural schematic diagram of a second embodiment of a lithium battery temperature detection device according to the present invention is shown.

[0019] The above drawings include the following reference numerals:

[0020] 10. Base; 11. First accommodating cavity; 14. First lug;

[0021] 20. Upper cover; 21. Third notch; 22. Second lug;

[0022] 30. Lithium battery;

[0023] 40. Support seat;

[0024] 50. Routing structure;

[0025] 60. Sealing ring; 61. Annular groove;

[0026] 70. Plate;

[0027] 80. Adapter board. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of this application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0032] Combine Figure 1 and Figure 2 As shown, according to a specific embodiment of the present application, a lithium battery temperature detection device is provided.

[0033] The lithium battery temperature detection device includes a base 10, an upper cover 20, and a support base 40. The upper cover 20 and the base 10 enclose a chamber. The chamber is used to accommodate the lithium battery 30 to be tested and the electrolyte. The support base 40 is disposed within the base 10 and supports the lithium battery 30. At least one of the base 10 and the upper cover 20 is provided with a wiring structure 50 for passing the temperature test line.

[0034] By applying the technical solution of this embodiment, a accommodating cavity is formed by the base 10 and the upper cover 20 to accommodate the lithium battery 30 and the electrolyte, a support base 40 for supporting the lithium battery 30 is provided in the base 10, and a wiring structure 50 is opened on at least one of the base 10 and the upper cover 20. A new type of lithium battery temperature detection device is provided, which can detect the temperature inside the lithium battery 30, solving the problem of difficulty in detecting the internal temperature of the lithium battery 30 in the prior art.

[0035] Furthermore, the support base 40 includes a support body. A limiting recess is provided on the side of the support body facing the upper cover 20. The support body is used to support the lithium battery.

[0036] Optionally, the surface of the limiting recess cooperates with the outer surface of the lithium battery 30

[0037] The limiting recess is adapted to the outer peripheral surface of the lithium battery 30 , which can improve the connection stability between the limiting recess and the lithium battery 30 .

[0038] The base 10 includes a base body. The base body is provided with a first accommodating cavity 11. The support base 40 is disposed within the first accommodating cavity 11. A first notch is provided at a first end of the base body. A second notch is provided at a second end of the base body. The first accommodating cavity 11 is used to accommodate electrolyte. By providing the base body with the first and second notches, a portion of the lithium battery 30 can be accommodated in the base 10.

[0039] Furthermore, the upper cover 20 includes an upper cover body. The upper cover body has a second accommodating cavity. A third notch 21 is provided at the first end of the upper cover body. A fourth notch is provided at the second end of the upper cover body. The second accommodating cavity and the first accommodating cavity 11 form an accommodating cavity.

[0040] The first notch and the third notch 21 cooperate to form a first pole through-hole. The second notch and the fourth notch cooperate to form a second pole through-hole. The wiring structure 50 is provided on the sidewall of at least one of the first accommodating cavity 11 and the second accommodating cavity. This arrangement allows the lithium battery 30 to be enclosed by the upper cover body and the base body, and the two poles of the lithium battery 30 are installed through the first pole through-hole and the second pole through-hole, which can effectively prevent electrolyte leakage and provide stable support for the lithium battery 30.

[0041] In an exemplary embodiment, the lithium battery temperature detection device further includes a sealing ring 60. A sealing ring 60 is provided at each of the first and second electrode through-holes. The sealing ring 60 is used to seal the first and second electrode through-holes, effectively preventing electrolyte leakage and preventing external impurities from entering the containment cavity and contaminating the electrolyte.

[0042] Furthermore, the outer circumference of the sealing ring 60 is provided with an annular groove 61. The walls of the first and second pole through-holes extend into the annular groove 61. The inner circumference of the sealing ring 60 is fitted over the pole of the lithium battery 30. This arrangement enables the sealing ring 60 to effectively seal the gap between the pole and the walls of the first and second pole through-holes.

[0043] like Figure 1 As shown, a first lug 14 is provided on the surface of the base 10. There are multiple first lugs 14, which are spaced apart along the circumference of the base 10. In one embodiment, the first lug 14 can be in the form of a screw washer, which is welded to the base 10.

[0044] Furthermore, the upper cover 20 is provided with a plurality of second lugs 22. These lugs 22 are arranged in a one-to-one correspondence with the first lugs 14. The corresponding first and second lugs 14, 22 are connected by a connector. This arrangement provides a strong connection between the upper cover 20 and the base 10 and facilitates disassembly.

[0045] According to another aspect of the present application, a temperature detection method for a lithium battery is provided, the method comprising the following steps: placing a battery cell to be detected in an environment with a humidity of a first preset value, performing a first short-circuit test, and obtaining a first qualified battery cell; welding the electrode plate 70 to the first qualified battery cell and performing a second short-circuit test, and obtaining a second qualified battery cell; placing the second qualified battery cell in an environment with a humidity of a second preset value, and weighing it; placing the weighed second qualified battery cell in a container containing an electrolyte and allowing it to stand for a first preset time, wherein the ambient temperature of the container is the first preset temperature; after the first preset time, weighing the second qualified battery cell again, and obtaining a third qualified battery cell; placing the third qualified battery cell in a receiving cavity of a lithium battery temperature detection device, and performing a temperature detection operation, wherein the lithium battery temperature detection device is the above-mentioned lithium battery temperature detection device.

[0046] Optionally, the first preset humidity value A1 ranges from 0 to 15%, the second preset humidity value A2 ranges from 0 to 1%, and the first preset temperature T ranges from 40°C to 50°C, preferably 45°C.

[0047] Furthermore, the third qualified battery cell is placed in the accommodating chamber of the lithium battery temperature detection device for temperature detection operation, including: respectively sleeve the sealing ring 60 on the pole of the third qualified battery cell, connect the temperature test line to the pole plate 70 of the third qualified battery cell and pass through the first pole through hole and the second pole through hole to electrically connect with the external detection equipment; pour the electrolyte at the bottom of the accommodating chamber and cover it with the upper cover 20; connect the formation equipment and perform formation activation under a second preset temperature environment; when the third qualified battery cell is left to stand for the second preset time and the temperature of the third qualified battery cell is at room temperature, perform a multi-rate detection operation on the third qualified battery cell.

[0048] It should be noted that the electrolyte in this embodiment is the same as the electrolyte in the above-described embodiment. Installing the upper cover 20 includes connecting the first lug 14 and the second lug 22 using locking bolts. Connecting the battery to the formation equipment includes connecting the ends of the third qualified battery cell to the positive and negative terminals of the formation equipment, respectively. The second preset ambient temperature is 85°C.

[0049] In an exemplary embodiment, the steps of modifying the rate process in the multi-rate detection operation of the third qualified battery cell are as follows: charge and discharge test at the first rate, first let it stand at room temperature and then test it at the first rate, then let it stand at room temperature and then test it at the second rate, then let it stand at room temperature and then test it at the third rate, and let it stand at room temperature and then test it at the fourth rate, and let it stand at room temperature. After completing these rate adjustment tests, the temperature data of each time is counted. Using the technical solution in this embodiment, the temperature test of the electrode plate 70 current collector can be performed. In an exemplary embodiment, the electrode plate 70 is an integrated column head.

[0050] Furthermore, the third qualified battery cell is placed in the accommodating cavity of the lithium battery temperature detection device for temperature detection operation, including: connecting the temperature test line to the electrode plate 70 and the adapter plate 80 of the third qualified battery cell respectively and passing through the wiring structure 50 to be electrically connected to the external detection equipment. This setting can detect the temperature of the electrode plate 70 and the adapter plate 80 at the same time. By adopting the technical solution of the present application, the working performance of the lithium battery can be tested and detected by measuring the data obtained by measuring the internal temperature of the battery. It can also be used to optimize the overcurrent capacity and welding problems of the hardware electrode plate 70 and the adapter plate 80, and reduce the problem of local heat generation inside the battery by further optimizing the design of the hardware.

[0051] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways, rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0052] In addition to the above, it should be noted that references to "one embodiment," "another embodiment," "an embodiment," and the like in this specification refer to specific features, structures, or characteristics described in conjunction with that embodiment as included in at least one embodiment generally described in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in conjunction with any embodiment, it is intended that such feature, structure, or characteristic, when implemented in conjunction with other embodiments, also falls within the scope of the present invention.

[0053] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0054] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A lithium battery temperature detection device, characterized in that: include: A base (10), the base (10) comprising: a base body, the base body being provided with a first accommodating cavity (11), the first accommodating cavity (11) being used to accommodate an electrolyte; An upper cover (20), the upper cover (20) and the base (10) enclose a receiving cavity, the receiving cavity being used to receive a lithium battery (30) to be tested and an electrolyte; A support base (40), the support base (40) being arranged in the base (10), the support base (40) being used to support the lithium battery (30), at least one of the base (10) and the upper cover (20) being provided with a wiring structure (50) for allowing a temperature test line to pass through, the temperature test line passing through the wiring structure (50) and being electrically connected to an external detection device; Wherein, the support seat (40) comprises: A support body is provided with a limiting recess on one side of the support body facing the upper cover (20).

2. The lithium battery temperature detection device according to claim 1, characterized in that: The surface of the limiting recess is arranged to cooperate with the outer surface of the lithium battery (30).

3. The lithium battery temperature detection device according to claim 1, characterized in that: The support seat (40) is arranged in the first accommodating cavity (11), the first end of the base body is provided with a first notch, and the second end of the base body is provided with a second notch.

4. The lithium battery temperature detection device according to claim 3, characterized in that: The upper cover (20) comprises: An upper cover body, the upper cover body having a second accommodating cavity, a third notch (21) being provided at the first end of the upper cover body, a fourth notch being provided at the second end of the upper cover body, the second accommodating cavity and the first accommodating cavity (11) forming the accommodating cavity, the first notch and the third notch (21) cooperating to form a first pole through hole, the second notch and the fourth notch cooperating to form a second pole through hole, the wiring structure (50) being opened on a side wall of at least one of the first accommodating cavity (11) and the second accommodating cavity.

5. The lithium battery temperature detection device according to claim 4, characterized in that: The lithium battery temperature detection device further comprises a sealing ring (60), wherein one sealing ring (60) is provided at each of the first pole through hole and the second pole through hole, an annular groove (61) is provided on the outer peripheral surface of the sealing ring (60), the hole walls of the first pole through hole and the second pole through hole extend into the annular groove (61), and the inner circle of the sealing ring (60) is sleeved on the pole of the lithium battery (30).

6. The lithium battery temperature detection device according to claim 1, characterized in that: A first lug (14) is provided on the surface of the base (10), wherein the first lugs (14) are multiple and are arranged at intervals along the circumference of the base (10); a second lug (22) is provided on the surface of the upper cover (20), wherein the second lugs (22) are multiple and are arranged in a one-to-one correspondence with the first lugs (14); and the correspondingly arranged first lugs (14) and second lugs (22) are connected via a connecting piece.

7. A method for detecting the temperature of a lithium battery, wherein the method uses the lithium battery temperature detection device according to any one of claims 1 to 6 for detection, characterized in that: The method comprises the following steps: Placing the battery cell to be tested in an environment with a humidity of a first preset value to perform a first short-circuit test to obtain a first qualified battery cell; Welding the electrode plate (70) to the first qualified battery cell and performing a second short-circuit test to obtain a second qualified battery cell; Placing the second qualified battery cell in an environment with a humidity of a second preset value for weighing, and placing the second qualified battery cell after weighing in a container containing an electrolyte and allowing it to stand for a first preset time, wherein the ambient temperature of the container is the first preset temperature; After the first preset time, weighing the second qualified battery cell again to obtain a third qualified battery cell; The third qualified battery cell is placed in the accommodating cavity of the lithium battery temperature detection device to perform temperature detection.

8. The method according to claim 7, characterized in that Placing the third qualified battery cell into a receiving cavity of a lithium battery temperature detection device for temperature detection, comprising: The sealing ring (60) is respectively sleeved on the pole of the third qualified battery cell, and the temperature test line is connected to the pole plate (70) of the third qualified battery cell and passed through the first pole through hole and the second pole through hole to be electrically connected to the external detection equipment; Pour electrolyte into the bottom of the accommodating chamber and cover it with the upper cover (20); Connect to the formation equipment and perform formation activation under the second preset temperature environment; After the third qualified battery cell has been left to stand for a second preset time and the temperature of the third qualified battery cell is at room temperature, a multi-rate detection operation is performed on the third qualified battery cell.

9. The method according to claim 7, characterized in that Placing the third qualified battery cell into a receiving cavity of a lithium battery temperature detection device for temperature detection, comprising: The temperature test wires are respectively connected to the electrode plate (70) and the adapter plate (80) of the third qualified battery cell and passed through the wiring structure (50) to be electrically connected to an external detection device.

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