Battery cell detection structure of high and low temperature chamber

Abstract

This utility model relates to the field of battery testing chamber technology, and more particularly to a high and low temperature chamber cell testing structure, comprising a high and low temperature chamber with a built-in variable temperature zone, and a cell compartment located in the variable temperature zone that can accommodate a number of cells; it also includes a DC / DC control area located outside the variable temperature zone, in which a number of DC / DC control boards equal to the number of cells are arranged; all DC / DC control boards and all cells are connected in series sequentially, and the first series line between two adjacent DC / DC control boards and the second series line between two corresponding cells are shorted by a shorting cable. The purpose of this utility model is to provide a high and low temperature chamber cell testing structure, which can shorten the cable length required for cell testing and reduce cell testing costs.

Description

Technical Field

[0001] This utility model relates to the field of battery testing chamber technology, and in particular to a high and low temperature chamber cell testing structure. Background Technology

[0002] A high and low temperature chamber for battery testing (also known as a battery high and low temperature test chamber) is a testing device specifically designed to simulate extreme temperature environments. It is used to evaluate the performance, safety, and reliability of batteries under different temperature conditions. Its working principle involves precisely controlling the temperature inside the chamber through a refrigeration and heating system to simulate extremely cold, high temperature, or rapid temperature change scenarios. This verifies the battery's capacity decay, internal resistance changes, and cycle life under extreme temperature cycling, as well as low-temperature cold start testing (for new energy vehicles) and high-temperature thermal runaway protection testing.

[0003] Battery high and low temperature test chambers are key equipment in the new energy industry chain. Through precise temperature control and multiple safety designs, they provide data support for battery research and development, mass production and certification.

[0004] In the battery cell testing process in the battery cell laboratory, a common testing method involves setting up multiple channel boards in the power cabinet, with the battery cells placed in the cell compartment within a high and low temperature chamber. Cables connect the channel boards and the battery cells to achieve cell testing. The channel board, commonly known in the field as a DC / DC control board, is a power management chip that operates on a DC->AC->DC principle, capable of both step-down and step-up voltage conversion. In the battery cell testing industry, it provides the necessary voltage and current for cell testing. Because the control board has multiple channels for connecting battery cells, it is commonly called a channel board.

[0005] like Figure 1 As shown, the power cabinet and the high and low temperature chamber are currently located in different spaces, requiring long cables to complete the cell testing. In particular, when using the parallel testing method, each cell requires two cables to connect to the channel board, resulting in high cell testing costs. Utility Model Content

[0006] The purpose of this utility model is to provide a high and low temperature chamber cell testing structure. The technical solution provided by this solution can shorten the cable length required for the cell and reduce the cell testing cost.

[0007] To achieve the above objectives, this utility model provides a high and low temperature chamber cell testing structure, including a high and low temperature chamber with a built-in temperature variable zone, and a cell compartment located in the temperature variable zone that can accommodate a number of cells; it also includes a DC / DC control area located outside the temperature variable zone, in which a number of DC / DC control boards equal to the number of cells are arranged; all DC / DC control boards and all cells are connected in series sequentially, and the first series line between two adjacent DC / DC control boards and the second series line between two corresponding cells are shorted by a shorting cable.

[0008] Preferably, the DC / DC control area is attached to the outer side of the high and low temperature chamber; or the DC / DC control area is located inside the high and low temperature chamber and outside the temperature variation zone.

[0009] Preferably, the first serial line, the second serial line, and the shorting cable are made of the same type of cable.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model combines the DC / DC control board with the high and low temperature chamber, and sets the DC / DC control board outside the temperature variation zone. The unique feature of this solution is that the adjacent channel boards and adjacent cells are all connected in series. The series lines between DC / DC control boards and the series lines between cells are connected one by one by cables, and the beginning and end of the DC / DC control board and the cell are connected in pairs, so that each DC / DC control board and each cell forms an independent detection circuit. Since two adjacent detection circuits share a connecting line, the length of the cable is greatly shortened, and the connecting cables in different spaces are shortened to a single temperature chamber, reducing the cell testing cost. Attached Figure Description

[0011] Figure 1 This is a connection diagram of the power cabinet and the high and low temperature chamber in the prior art;

[0012] Figure 2 A connection block diagram of a high and low temperature chamber cell testing structure provided by this utility model. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] A high-low temperature chamber for battery testing is a testing device specifically designed to simulate extreme temperature environments, used to evaluate the performance, safety, and reliability of batteries under different temperature conditions. In the cell testing process in a cell laboratory, a common testing method involves setting up multiple channel boards within a power cabinet, with the cells placed in a cell compartment within the high-low temperature chamber. Cables connect the channel boards and the cells to achieve cell testing. As described in the background section, the channel board is essentially a DC / DC control board.

[0015] Currently, the power cabinet and the high and low temperature chamber are located in different spaces, requiring long cables to complete the cell testing. In particular, when using the parallel testing method, each cell requires two cables to connect to the channel board, resulting in high cell testing costs.

[0016] Please see Figure 2 To address the aforementioned technical problem of high testing costs, this embodiment provides a high and low temperature chamber cell testing structure. This solution shortens the connecting cables between different spaces into a single temperature chamber, significantly reducing cable length and lowering cell testing costs.

[0017] Specifically, this embodiment of a high and low temperature chamber cell testing structure includes a high and low temperature chamber 10 with a built-in variable temperature zone 11, and a cell compartment 12 located in the variable temperature zone 11 that can accommodate a plurality of cells 13. It also includes a DC / DC control area 20 located outside the variable temperature zone 11. The high and low temperature chamber 10 is a conventional temperature chamber in the art, with a built-in variable temperature zone 11. The variable temperature zone 11 can simulate the external high and low temperature environment by heating or cooling, so as to realize the electrical performance testing of the cells 13 under high and low temperature environment.

[0018] In this embodiment, the DC / DC control area 20 contains a number of DC / DC control boards 21 equal to the number of battery cells 13. All DC / DC control boards 21 and all battery cells 13 are connected in series, i.e., all DC / DC control boards 21 and all battery cells 13 are connected in series by cables, and the two ends of each DC / DC control board 21 and battery cell 13 are then connected in pairs to form a large detection loop. Uniquely, in this embodiment, the first series line between two adjacent DC / DC control boards 21 and the second series line between two corresponding battery cells 13 are shorted by a shorting cable, allowing each DC / DC control board 21 and each battery cell 13 to form an independent detection loop. The series lines and shorting cables use the same type of cable.

[0019] It should be noted that the corresponding position mentioned above refers to the specific DC / DC control board, and its corresponding position refers to the battery cell connected to it for detection. For example, in a large detection loop consisting of three DC / DC control boards and three battery cells, the DC / DC control boards and battery cells are connected in series from top to bottom to form a control string and a battery cell string. The top and bottom of the control string and the battery cell string are connected in series. The first DC / DC control board in the control string corresponds to the first battery cell in the battery cell string, and so on. Since the number of DC / DC control boards is equal to the number of battery cells, each DC / DC control board can find a corresponding battery cell. Similarly, the second series line at the position corresponding to the first series line is also in a one-to-one correspondence.

[0020] Therefore, in this embodiment, each DC / DC control board 21 and the corresponding battery cell 13 form an independent detection circuit, which does not affect the detection results of adjacent battery cells 13 during the detection process. Although the battery cells 13 in this embodiment use independent detection circuits, since all DC / DC control boards 21 and all battery cells 13 are connected in series, the power supply of DC / DC control boards 21 and battery cells 13 uses a single circuit. That is, the technical solution provided in this embodiment is applicable to the detection method of simultaneous charging and discharging. If any DC / DC control board 21 or battery cell 13 is disconnected, the entire detection circuit will be affected.

[0021] To reduce the testing cost of battery cell 13, in addition to the above structural features, this embodiment can specifically attach the DC / DC control area 20 to the outer surface of the high and low temperature chamber 10; or the DC / DC control area 20 can be located inside the high and low temperature chamber 10, outside the variable temperature zone 11. Since the high and low temperature chamber 10 simulates a high and low temperature external environment, its main operating position is located within the variable temperature zone 11, while areas outside the variable temperature zone 11 do not affect the normal operation of the high and low temperature chamber. In this embodiment, placing the DC / DC control area 20 outside the variable temperature zone 11, whether attached to the outer surface of the high and low temperature chamber 10 or located inside the chamber, will not affect the normal operation of the high and low temperature chamber and can further reduce the testing cost of battery cell 13.

[0022] In summary, the high and low temperature chamber cell 13 detection structure provided in this embodiment combines the DC / DC control board 21 with the high and low temperature chamber, and places the DC / DC control board 21 outside the variable temperature zone 11. The series lines between the DC / DC control boards 21 and the series lines between the cells 13 are connected one by one with cables, so that each DC / DC control board 21 and each cell 13 forms an independent detection circuit. Since two adjacent detection circuits share a single connection line, compared with the prior art which requires 2N cables, this embodiment shortens the connection cables in different spaces to one temperature chamber, requiring only N+1 cables, which improves energy conversion efficiency, greatly shortens the cable length, and reduces the detection cost of the cell 13.

[0023] Those skilled in the art will recognize that the device and algorithm steps of the various examples described in conjunction with the embodiments disclosed in this application can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0024] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process of the device described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0025] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the components and steps of each example have been described. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0026] The embodiments of the methods or devices described above are merely illustrative. Furthermore, the mutual couplings or direct couplings or communication connections shown or discussed may be indirect couplings or communication connections through some interfaces, devices or units, or may be electrical, mechanical or other forms of connection.

[0027] Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0028] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A high-low temperature chamber cell detection structure, characterized in that: It includes a high and low temperature chamber with a built-in temperature-variable zone, and a cell compartment located in the temperature-variable zone that can accommodate a number of cells; it also includes a DC / DC control area located outside the temperature-variable zone, in which a number of DC / DC control boards equal to the number of cells are arranged; all DC / DC control boards and all cells are connected in series sequentially, and the first series line between two adjacent DC / DC control boards and the second series line between two corresponding cells are shorted by a shorting cable.

2. The high-low temperature chamber cell detection structure of claim 1, wherein: The DC / DC control area is attached to the outer side of the high and low temperature chamber; or the DC / DC control area is located inside the high and low temperature chamber and outside the temperature variation zone.

3. The high-low temperature chamber cell detection structure of claim 2, wherein: The first series line, the second series line and the shorting cable are made of the same cable.

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