A negative pressure airtightness test device for square lithium battery with both sides of the pole placed horizontally

Abstract

The present invention discloses a negative pressure airtightness test device for horizontally placed electrodes on both sides of a square lithium battery. The device comprises: a main body support shell having a hollow cavity therein; a negative pressure collection mechanism disposed on the main body support shell, comprising a negative pressure detection unit and a negative pressure docking unit, the negative pressure detection unit having a plurality of independent negative pressure display meters; the negative pressure docking unit comprising a negative pressure docking plate having a plurality of negative pressure docking holes, the positions of the negative pressure docking holes corresponding to the positions of the negative pressure suction nozzles of a negative pressure formation device, the inner ends of the negative pressure docking holes being connected to the negative pressure display meters via negative pressure tubes; and a control feedback mechanism comprising a PCB control board and a power supply component, the PCB control board being disposed in the hollow cavity of the main body support shell, the PCB control board being connected to the negative pressure display meter and a host computer via a data cable; the PCB control board, the negative pressure display meter, and the power supply component being electrically connected. The present invention has the beneficial effect of being able to detect whether each channel of the negative pressure formation device is blocked or leaking.

Description

Technical Field

[0001] The invention relates to a negative pressure air tightness testing device for horizontally placed poles on both sides of a square lithium battery, belonging to the field of battery manufacturing. Background Art

[0002] During the negative pressure formation process of lithium batteries, the negative pressure formation equipment adjusts the air pressure inside the battery through a pressure control system, and extracts the gas generated during the battery formation process from the battery's liquid filling port through a negative pressure vacuum system. During this process, a portion of the electrolyte in the battery will be pumped into a temporary storage container along with the above-mentioned gas. If there is a problem with the negative pressure system of the negative pressure formation equipment, the gas generated during the battery formation process will be retained in the lithium battery, causing the battery shell to swell, become scrapped, or even explode, which will cause great harm and loss. However, there is currently a lack of specialized negative pressure formation equipment testing equipment that can easily detect whether the various channels of the negative pressure formation equipment are blocked or leaking. Manual inspection is often required, which increases equipment maintenance costs and reduces utilization efficiency. Summary of the Invention

[0003] To solve the above problems, the present invention proposes a negative pressure airtightness testing device for square lithium battery with vertically placed poles on both sides, which can monitor whether each channel of the negative pressure formation equipment is leaking.

[0004] The technical solution adopted in the present invention is:

[0005] A negative pressure airtightness test device for a square lithium battery with both side poles placed horizontally, characterized by comprising:

[0006] A main body supporting shell, wherein the main body supporting shell has a hollow cavity therein;

[0007] The negative pressure collection mechanism is provided on the main support shell and includes a negative pressure detection portion and a negative pressure docking portion. The negative pressure detection portion has a plurality of independent negative pressure display meters. The negative pressure docking portion includes a negative pressure docking plate, which is provided with a plurality of negative pressure docking holes. The positions of the negative pressure docking holes correspond one-to-one with the positions of the negative pressure suction nozzles of the negative pressure formation equipment, and the negative pressure docking holes communicate with the inner and outer sides of the negative pressure docking plate. The outer ends of the negative pressure docking holes are used to dock one-to-one with the negative pressure suction nozzles of the negative pressure formation equipment, and the inner ends of the negative pressure docking holes are connected to the negative pressure display meters via negative pressure tubes.

[0008] And a control feedback mechanism, including a PCB control board and a power collection component, the PCB control board is arranged in the hollow cavity of the main support shell, and the PCB control board is connected to the negative pressure display meter and the host computer through a data line; the PCB control board, the negative pressure display meter and the power collection component are electrically connected; the power collection component is arranged on the outside of the main support shell, and the setting position of the power collection component corresponds to the setting position of the power supply docking terminal of the negative pressure formation equipment, and is used to dock with the power supply docking terminal of the negative pressure formation equipment to enable the control feedback mechanism to draw power from the negative pressure formation equipment.

[0009] Furthermore, the main support shell includes a bottom plate, a right side plate, a rear fixing plate and a top cover plate. The top cover plate and the bottom plate are arranged parallel to each other and are fixed by the right side plate and the rear fixing plate to form a rectangular shell with openings on the front and left sides.

[0010] Furthermore, the negative pressure detection part includes a negative pressure display gauge fixing plate and a negative pressure display gauge. The negative pressure display gauge fixing plate is rectangular and is installed at the opening at the front end of the main support shell; the negative pressure display gauge is embedded in the negative pressure display gauge fixing plate, and each negative pressure display gauge is connected to a corresponding negative pressure tube.

[0011] Furthermore, the negative pressure detection part also includes at least one negative pressure tube comb plate, which is rectangular and vertically arranged in the hollow cavity of the main support shell. The lower side of the negative pressure tube comb plate is fixedly connected to the bottom plate, and the upper side of the negative pressure tube comb plate is provided with a number of grooves at intervals, and the negative pressure tube is inserted into the corresponding grooves of the negative pressure tube comb plate.

[0012] Furthermore, the negative pressure docking part includes a negative pressure docking plate, a negative pressure docking plate fixing plate and a docking adjustment device. The negative pressure docking plate fixing plate is parallel to the right side plate and is fixed at the opening on the left side of the main support shell; the negative pressure docking plate fixing plate is provided with a horizontal long waist-shaped through hole; the negative pressure docking plate is installed on the outside of the negative pressure docking plate fixing plate through the docking adjustment device, and the negative pressure docking hole of the negative pressure docking plate is located at the long waist-shaped through hole.

[0013] Furthermore, the negative pressure tube is L-shaped, one end of which is connected to the negative pressure display meter, and the other end of which passes through the long waist-shaped through hole and is connected to the negative pressure docking hole.

[0014] Furthermore, the docking adjustment device includes a locking seat with a locking knob, which is arranged at the end of the negative pressure docking plate and is slidably arranged on the outer surface of the negative pressure docking plate fixing plate through a slide rail.

[0015] Furthermore, the power-taking component includes a signal docking copper plate and a high-voltage copper bar fixing plate. The signal docking copper plate is installed on the front end of the negative pressure docking plate fixing plate through the high-voltage copper bar fixing plate. The setting position of the signal docking copper plate corresponds to the setting position of the power supply docking end of the negative pressure formation equipment, and is used to dock with the power supply docking end of the negative pressure formation equipment.

[0016] Furthermore, heat dissipation holes are arranged on the bottom plate and the top cover plate.

[0017] The working principle of the invention is as follows: a negative pressure forming device is docked with a negative pressure docking hole on a negative pressure docking plate through a negative pressure suction nozzle, and the interior of the negative pressure forming device is evacuated into a vacuum. Since the negative pressure forming device is connected with a negative pressure airtightness testing device, a vacuum environment is also formed in the negative pressure airtightness testing device, and the negative pressure display meter is used for real-time display. A PCB control board of a control feedback mechanism collects data from the negative pressure display meter, and the PCB control board then feeds back data to a host computer through a communication interface and a data line. The data can be displayed in real time in the host computer, and the host computer analyzes and monitors whether each channel of the negative pressure forming device has an air leakage problem, thereby quickly finding the problem and handling it in time. A docking adjustment device can adjust the hole position of the negative pressure docking hole of the negative pressure docking plate, so as to realize negative pressure detection of devices of different models.

[0018] The beneficial effects of the present invention are: it can detect whether each channel of the negative pressure formation equipment is blocked or leaking, without manual operation, reducing equipment maintenance costs, and avoiding phenomena such as battery shell swelling, scrapping, and even battery explosion caused by failure of the negative pressure system of the negative pressure formation equipment; in the process of detecting the formation power horizontal battery equipment, it can accurately align, quickly detect the air tightness of the product online, intelligently collect and feedback fault points, accurately troubleshoot, improve operating efficiency, reduce labor intensity, improve product quality, and ensure stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present invention.

[0020] Figure 2 It is a bottom view of the present invention.

[0021] Figure 3 yes Figure 2 Enlarged view of point A.

[0022] Figure 4 yes Figure 2 Enlarged view of point B.

[0023] Figure 5 It is a structural diagram of the negative pressure docking portion of the present invention.

[0024] Figure 6It is a structural schematic diagram of the negative pressure docking portion of the present invention, showing the back structure of the negative pressure docking plate fixing plate.

[0025] Figure 7 It is a front view of the negative pressure docking portion of the present invention.

[0026] Figure 8 It is a rear view of the negative pressure docking portion of the present invention. DETAILED DESCRIPTION

[0027] The following describes the specific implementation of the embodiment of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the embodiment of the present invention and is not used to limit the embodiment of the present invention.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0034] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0035] The present invention provides a negative pressure airtightness test device for a square lithium battery with horizontally placed electrodes on both sides, comprising:

[0036] The main body supporting shell 1 has a hollow cavity therein for supporting and installing the negative pressure collection mechanism 2 and the control feedback mechanism 3;

[0037] The negative pressure collection mechanism 2 is provided on the main support shell 1 and includes a negative pressure detection portion 21 and a negative pressure docking portion 22. The negative pressure detection portion 21 has a plurality of independent negative pressure display gauges 211; the negative pressure docking portion 22 includes a negative pressure docking plate 221, and the negative pressure docking plate 221 is provided with a plurality of negative pressure docking holes 2211. The positions of the negative pressure docking holes 2211 correspond one-to-one with the positions of the negative pressure suction nozzles of the negative pressure formation equipment, and the negative pressure docking holes 2211 communicate with the inner and outer sides of the negative pressure docking plate 221. The outer ends of the negative pressure docking holes 2211 are used to dock one-to-one with the negative pressure suction nozzles of the negative pressure formation equipment, and the inner ends of the negative pressure docking holes 2211 are connected to the negative pressure display gauge 211 via negative pressure tubes 213.

[0038] And a control feedback mechanism 3, including a PCB control board 31 and a power-taking component 32. The PCB control board 31 is arranged in the hollow cavity of the main support shell 1, and the PCB control board 31 is connected to the negative pressure display meter 211 and the host computer through a signal line; the PCB control board 31, the negative pressure display meter 211 and the power-taking component 32 are electrically connected; the power-taking component 32 is arranged on the outside of the main support shell 1, and the setting position of the power-taking component 32 corresponds to the setting position of the power supply docking terminal of the negative pressure formation equipment, and is used to dock with the power supply docking terminal of the negative pressure formation equipment to realize the control feedback mechanism 3 to draw power from the negative pressure formation equipment.

[0039] In some embodiments of the present invention, the main body support housing 1 comprises a bottom plate 11, a right side plate 12, a rear fixing plate 13, and a top cover plate 14. The top cover plate 14 and bottom plate 11 are arranged parallel to each other and secured together by the right side plate 12 and rear fixing plate 13 to form a rectangular housing with open front and left sides. The main body support housing 1 provides mechanical protection. The robust housing effectively resists external mechanical forces, protecting the delicate instruments and circuitry within from damage.

[0040] In some embodiments of the present invention, the negative pressure detection unit 21 includes a negative pressure display meter fixing plate 212 and a negative pressure display meter 211. The negative pressure display meter fixing plate 212 is rectangular and is installed at the opening at the front end of the main support shell 1; the negative pressure display meter 211 is embedded in the negative pressure display meter fixing plate 212, and each negative pressure display meter 211 is connected to a corresponding negative pressure tube. The negative pressure tube 213 is connected to the negative pressure docking plate. The negative pressure display meter is connected to the PCB control board via a signal line to transmit the detection data to the PCB control board.

[0041] In some embodiments of the present invention, a plurality of negative pressure display gauges 211 are evenly spaced on the negative pressure display gauge fixing plate 212 . The negative pressure display gauges 211 are arranged horizontally, and each negative pressure display gauge 211 is connected to a negative pressure tube 213 .

[0042] In some embodiments of the present invention, the negative pressure detection unit 21 also includes two negative pressure tube comb plates 214, one of which is parallel to the negative pressure display meter fixing plate 212, and the other is parallel to the right side plate 12 and the negative pressure docking plate 221; the negative pressure tube comb plate 214 is rectangular, and the negative pressure tube comb plate 214 is vertically arranged in the hollow cavity of the main support shell 1, and the lower side of the negative pressure tube comb plate 214 is fixedly connected to the bottom plate 11, and the upper side of the negative pressure tube comb plate 214 is spaced apart with a number of grooves 2141, and the negative pressure tube 213 is inserted into the corresponding grooves 2141 of the negative pressure tube comb plate 214 to prevent the negative pressure tube from moving inside the equipment and causing air leakage at the interface.

[0043] In some embodiments of the present invention, the negative pressure docking part 22 includes a negative pressure docking plate 221, a negative pressure docking plate fixing plate 222 and a docking adjustment device 223. The negative pressure docking plate fixing plate 222 is parallel to the right side plate 12 and is fixed at the opening on the left side of the main support shell 1; the negative pressure docking plate fixing plate 222 is provided with a horizontal long waist-shaped through hole 2221, which is convenient for leaking out the negative pressure docking hole 2211 on the negative pressure docking plate 221; the negative pressure docking plate 221 is installed on the outside of the negative pressure docking plate fixing plate 222 through the docking adjustment device 223, and the negative pressure docking hole 2211 of the negative pressure docking plate 221 is located at the long waist-shaped through hole 2221. The negative pressure docking plate fixing plate 222 plays a supporting role, so that the negative pressure docking plate 221 and the negative pressure suction nozzle of the negative pressure charging and discharging equipment have a higher matching accuracy; a negative pressure docking plate reinforcement rib 224 is provided between the negative pressure docking plate fixing plate 222 and the bottom plate 11, which is used to improve the strength of the negative pressure docking plate fixing plate 222 when the negative pressure formation equipment is docked with the air tightness detection equipment.

[0044] In some embodiments of the present invention, the negative pressure tube 213 is a hollow, L-shaped tube. It is horizontally arranged within the hollow cavity of the main support housing 1 via two negative pressure tube comb plates 214. These plates are used to secure the negative pressure tube 213 while preventing it from moving within the device and causing air leaks at the interface. The two negative pressure tube comb plates 214 are arranged at 90 degrees to each other, parallel to the negative pressure docking plate 221 and the negative pressure display fixture plate 212, respectively, and together support the negative pressure tube 213. Adjusting the negative pressure tube 213 does not affect the connection, effectively preventing air leaks in the negative pressure tube 213.

[0045] In some embodiments of the present invention, the negative pressure tubes 213 are located on the same horizontal plane and are deployed in the hollow cavity.

[0046] In some embodiments of the present invention, the outer surface of the negative pressure docking plate fixing plate 222 is provided with two vertical slide grooves 2222 parallel to each other, and each vertical slide groove 2222 corresponds to a set of docking adjustment devices 223; there are two sets of docking adjustment devices 223, which are respectively installed at the two ends of the length direction of the negative pressure docking plate 221.

[0047] In some embodiments of the present invention, the docking adjustment device 223 includes a locking seat 2231 with a locking knob 2232. The locking seat 2231 is disposed at the end of the negative pressure docking plate 221. A slide rail 2233 is disposed on the side of the locking seat 2231 facing the negative pressure docking plate fixing plate 222. The slide rail 2233 is disposed on a vertical slide groove 2222 of the negative pressure docking plate fixing plate 222, and the two slide together in a sliding manner. The locking seat 2231 has a built-in locking knob 2232. When in use, the position of the negative pressure docking plate 221 can be adjusted as needed. After adjustment, the locking knob 2232 is adjusted to lock the negative pressure docking plate 221.

[0048] In some embodiments of the present invention, the power-taking component 32 includes a signal docking copper plate 321 and a high-voltage copper bar fixing plate 322. The signal docking copper plate 321 is installed on the front end of the negative pressure docking plate fixing plate 222 through the high-voltage copper bar fixing plate 322. The setting position of the signal docking copper plate 321 corresponds to the setting position of the power supply docking end of the negative pressure formation equipment, and is used to dock with the power supply docking end of the negative pressure formation equipment.

[0049] In some embodiments of the present invention, a communication interface fixing plate 33 is provided on the front of the right side panel 12, and a communication interface 331 for plugging a data cable is installed on the communication interface fixing plate 33. The communication interface 331 is electrically connected to the PCB control board 31. The PCB control board 31 receives the negative pressure information detected by the negative pressure display meter 211, and then feeds it back to the host computer through the communication interface 331 and the data cable, so that it is displayed in real time in the host computer, monitoring whether there is a problem in each channel of the negative pressure formation equipment, so as to facilitate quick identification of the problem and timely handling, and prevent danger caused by problems in the channel of the negative pressure formation equipment.

[0050] In some embodiments of the present invention, heat dissipation holes 15 are arranged on the bottom plate 11 and the top cover plate 14 to discharge the heat in the test equipment in a timely manner.

[0051] The working principle of the present invention is as follows: a negative pressure forming device is docked with a negative pressure docking hole 2211 on a negative pressure docking plate 221 through a negative pressure suction nozzle, and the interior of the negative pressure forming device is evacuated. Since the negative pressure forming device is connected to a negative pressure airtightness testing device, a vacuum environment is also formed in the negative pressure airtightness testing device, and is displayed in real time through a negative pressure display meter 211. A PCB control board 31 of a control feedback mechanism 3 collects data from the negative pressure display meter 211, and the PCB control board 31 then feeds back data to a host computer through a communication interface and a data line. The data can be displayed in real time in the host computer, and the host computer analyzes and monitors whether there is an air leakage problem in each channel of the negative pressure forming device, thereby quickly finding the problem and handling it in time. The docking adjustment device 223 can adjust the hole position of the negative pressure docking hole of the negative pressure docking plate to realize negative pressure detection of different models of equipment.

[0052] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A negative pressure airtightness test device for square lithium battery with horizontally placed poles on both sides, characterized in that: include: A main body supporting shell (1), wherein the main body supporting shell (1) is provided with a hollow cavity; The main body support shell (1) includes a right side plate (12); A negative pressure collection mechanism (2) is provided on the main support shell (1), comprising a negative pressure detection portion (21) and a negative pressure docking portion (22), wherein the negative pressure detection portion (21) has a plurality of negative pressure display gauges (211) that are independent of each other; the negative pressure docking portion (22) comprises a negative pressure docking plate (221), wherein the negative pressure docking plate (221) is provided with a plurality of negative pressure docking holes (2211), wherein the positions of the negative pressure docking holes (2211) correspond one-to-one to the positions of the negative pressure suction nozzles of the negative pressure formation device, and the negative pressure docking holes (2211) communicate with the inner and outer sides of the negative pressure docking plate (221), wherein the outer ends of the negative pressure docking holes (2211) are used for one-to-one docking with the negative pressure suction nozzles of the negative pressure formation device, and the inner ends of the negative pressure docking holes (2211) are connected to the negative pressure display gauge (211) via negative pressure tubes (213); The negative pressure detection part (21) further includes at least one negative pressure tube comb plate (214), the negative pressure tube comb plate (214) is rectangular, the negative pressure tube comb plate (214) is vertically arranged in the hollow cavity of the main support shell (1), the lower side of the negative pressure tube comb plate (214) is fixedly connected to the bottom plate (11), and the upper side of the negative pressure tube comb plate (214) is spaced apart with a plurality of grooves (2141), and the negative pressure tube (213) is inserted into the corresponding grooves (2141) of the negative pressure tube comb plate (214); the negative pressure docking part (22) includes a negative pressure docking plate (221), a negative pressure docking plate fixing plate (222) and a docking adjustment device (223), the negative pressure docking plate fixing plate (222) is parallel to the right side plate (12) and fixedly installed at the opening on the left side of the main support shell (1); the negative pressure A horizontal waist-shaped through hole (2221) is provided on the docking plate fixing plate (222); the negative pressure docking plate (221) is mounted on the outer side of the negative pressure docking plate fixing plate (222) via a docking adjustment device (223), and the negative pressure docking hole (2211) of the negative pressure docking plate (221) is located at the waist-shaped through hole (2221); the negative pressure tube (213) is L-shaped, one end of which is connected to the negative pressure display meter (211) and the other end of which passes through the waist-shaped through hole (2221) and is connected to the negative pressure docking hole (2211); the docking adjustment device (223) includes a locking seat (2231) with a locking knob (2232); the locking seat (2231) is arranged at the end of the negative pressure docking plate (221) and is slidably arranged on the outer surface of the negative pressure docking plate fixing plate (222) via a slide rail (2233); The invention also provides a control feedback mechanism (3), comprising a PCB control board (31) and a power-taking component (32), wherein the PCB control board (31) is arranged in the hollow cavity of the main support shell (1), and the PCB control board (31) is connected to a negative pressure display meter (211) and a host computer via a data line; the PCB control board (31), the negative pressure display meter (211) and the power-taking component (32) are electrically connected; the power-taking component (32) is arranged outside the main support shell (1), and the setting position of the power-taking component (32) corresponds to the setting position of the power supply docking terminal of the negative pressure forming device, and is used to dock with the power supply docking terminal of the negative pressure forming device to enable the control feedback mechanism (3) to draw power from the negative pressure forming device.

2. The negative pressure airtightness test equipment for a square lithium battery with horizontally placed terminals as claimed in claim 1, characterized in that: The main support shell (1) comprises a bottom plate (11), a rear fixing plate (13) and a top cover plate (14); the top cover plate (14) and the bottom plate (11) are arranged parallel to each other in an upper and lower direction, and are fixed by the right side plate (12) and the rear fixing plate (13) to form a rectangular shell with both the front end and the left side opened.

3. The negative pressure airtightness test equipment for horizontally placed electrodes on both sides of a square lithium battery according to claim 2, characterized in that: The negative pressure detection portion (21) includes a negative pressure display gauge fixing plate (212) and a negative pressure display gauge (211). The negative pressure display gauge fixing plate (212) is rectangular and is mounted at the opening at the front end of the main support shell (1). The negative pressure display gauge (211) is embedded in the negative pressure display gauge fixing plate (212), and each negative pressure display gauge (211) is connected to a corresponding negative pressure tube (213).

4. The negative pressure airtightness test equipment for a square lithium battery with horizontally placed terminals as claimed in claim 3, characterized in that: The power taking component (32) comprises a signal docking copper plate (321) and a strong current copper bar fixing plate (322). The signal docking copper plate (321) is mounted on the front end of the negative pressure docking plate fixing plate (222) via the strong current copper bar fixing plate (322). The setting position of the signal docking copper plate (321) corresponds to the setting position of the power supply docking end of the negative pressure forming device, and is used for docking with the power supply docking end of the negative pressure forming device.

5. The negative pressure airtightness testing device for a square lithium battery with horizontally placed terminals as claimed in claim 2, characterized in that: Heat dissipation holes are arranged on the bottom plate (11) and the top cover plate (14).

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