Battery pack airtightness detection device and battery pack airtightness testing equipment

Abstract

The present disclosure provides a battery pack airtightness detection device and a battery pack airtightness testing device. The device includes an airtightness detection base, an airtightness detection top cover and an airtightness detection ring; the airtightness detection top cover is arranged on the airtightness detection base, and the airtightness detection top cover and the airtightness detection base are detachably connected; the airtightness detection ring is located between the airtightness detection top cover and the airtightness detection base, and the airtightness detection ring is sleeved on the battery pack, and the airtightness detection ring abuts against the sealing area of ​​the battery pack. By replacing the original sealing ring on the battery pack with the airtightness detection ring, that is, using the airtightness detection component of the battery pack as the sealing component on the battery pack, through the setting of the airtightness detection ring, it can not only act as the original sealing ring to avoid additional testing costs, but also collect and detect the airtightness of the battery pack, realize the airtightness testing function of the battery pack, and effectively reduce the cost of testing the airtightness of the battery pack.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery packs, and in particular to a battery pack airtightness detection device and a battery pack airtightness testing equipment. Background Art

[0002] At present, the commonly used air tightness detection methods include pressure drop detection method, bubble method, and differential pressure detection method. Among them, in the pressure drop detection method, when the leakage rate of the battery pack under test is small, the pressure drop in a short period of time is very small, and the detection accuracy of the pressure sensor is very high. However, it is difficult for the pressure sensor to simultaneously meet the detection requirements of a large range (rated detection air pressure of the battery pack) and high precision (small pressure changes in the battery pack). Due to the installation space and installation position restrictions of the battery pack in the car, the bubble method is not suitable for use in electric vehicles. The commonly used automotive power battery air tightness detection method is the differential pressure detection method. The differential pressure leak detection method is to fill the gas into the test piece (battery pack) and the reference piece at the same time, and then compare the differential pressure between the two within a certain period of time to determine whether the test piece has a leak.

[0003] Traditional differential pressure detectors use pneumatic stop valves and high-precision pressure regulating valves to control the air intake volume and pressure of the test piece (battery pack) and the standard tank. There are generally two ways to inflate the battery pack:

[0004] One method is to drill a threaded hole on the box and install the inflation joint through the threaded method, which has a fast inflation speed. However, an extra hole needs to be drilled on the box, which increases the processing cost, and after the inflation test is qualified, it needs to be re-sealed with bolts, which is troublesome to operate and there is a risk of unqualified sealing due to poor sealing.

[0005] The other method is to connect the connector to the balance valve (also called explosion-proof valve, breathing valve, waterproof breathable valve) on the battery pack, and inflate through the air-permeable and water-impermeable semipermeable membrane in the balance valve.

[0006] However, both of the above detection methods require additional components for test collection, which not only affects the test efficiency, but also makes the test process more complicated, resulting in excessively high costs for the battery pack air tightness test and is not conducive to rapid testing of the battery pack air tightness. Utility Model Content

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a battery pack airtightness detection device and a battery pack airtightness testing device that effectively reduce the cost of airtightness testing.

[0008] The purpose of this disclosure is achieved through the following technical solutions:

[0009] A battery pack airtightness detection device comprises: an airtightness detection base, an airtightness detection top cover and an airtightness detection ring; the airtightness detection base is used to place a battery pack; the airtightness detection top cover is arranged on the airtightness detection base, the airtightness detection top cover and the airtightness detection base are detachably connected, and the battery pack is arranged between the airtightness detection top cover and the airtightness detection base; the airtightness detection ring is located between the airtightness detection top cover and the airtightness detection base, the airtightness detection ring is sleeved on the battery pack, the airtightness detection ring abuts against the sealing area of ​​the battery pack, and the airtightness detection ring is used to collect contact pressure with the battery pack to detect the airtightness of the battery pack.

[0010] In one of the embodiments, the airtight detection base is provided with a receiving groove, the opening of the receiving groove faces the airtight detection top cover, and the receiving groove is used to accommodate at least a portion of the battery pack.

[0011] In one of the embodiments, at least a portion of the airtight detection ring is located in the accommodating groove.

[0012] In one of the embodiments, the airtight detection base is further provided with an installation positioning hole communicated with the accommodating groove, and a portion of the airtight detection top cover is clamped in the installation positioning hole.

[0013] In one of the embodiments, the airtight detection cover includes an airtight top plate and an airtight positioning column connected to each other, the airtight positioning column is located on a side of the airtight top plate close to the airtight detection base, and the airtight positioning column is inserted into the installation positioning hole.

[0014] In one embodiment, the airtight detection top cover also includes an installation limit column connected to the airtight top plate, and the airtight detection base also has an installation limit groove connected to the accommodating groove, and the installation limit column is clamped in the installation limit groove.

[0015] In one of the embodiments, the airtight top plate is provided with an airtight ring receiving groove, the opening of the airtight ring receiving groove faces the airtight detection base, and the airtight ring receiving groove is used to receive the airtight detection ring.

[0016] In one of the embodiments, the airtight detection cover further includes a fixing pin, the airtight top plate is provided with a fixing through hole, the fixing pin is passed through the fixing through hole and is connected to the airtight detection base.

[0017] In one of the embodiments, the airtight detection base is provided with a fixing hole, and a portion of the fixing pin is clamped in the fixing hole.

[0018] A battery pack airtightness testing device comprises a piezoelectric converter and the battery pack airtightness detection device described in any one of the above embodiments, wherein the piezoelectric converter is electrically connected to the airtightness detection ring of the battery pack airtightness detection device.

[0019] Compared with the prior art, the present invention has at least the following advantages:

[0020] By replacing the original sealing ring on the battery pack with an airtight detection ring, that is, using the airtight detection component of the battery pack as the sealing component on the battery pack, through the setting of the airtight detection ring, it can not only act as the original sealing ring to avoid additional testing costs, but also collect and detect the airtightness of the battery pack, thereby realizing the airtightness test function of the battery pack and effectively reducing the cost of testing the airtightness of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a schematic diagram of a battery pack airtightness detection device in one embodiment;

[0023] Figure 2 for Figure 1 The cross-sectional view of the battery pack airtightness detection device along the AA direction is shown. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] The present disclosure relates to a battery pack airtightness detection device. In one embodiment, the battery pack airtightness detection device includes an airtightness detection base, an airtightness detection top cover, and an airtightness detection ring; the airtightness detection base is used to place the battery pack; the airtightness detection top cover is arranged on the airtightness detection base, the airtightness detection top cover and the airtightness detection base are detachably connected, and the battery pack is arranged between the airtightness detection top cover and the airtightness detection base; the airtightness detection ring is located between the airtightness detection top cover and the airtightness detection base, the airtightness detection ring is sleeved on the battery pack, the airtightness detection ring abuts against the sealing area of ​​the battery pack, and the airtightness detection ring is used to collect the contact pressure with the battery pack to detect the airtightness of the battery pack. By replacing the original sealing ring on the battery pack with an airtight detection ring, that is, using the airtight detection component of the battery pack as the sealing component on the battery pack, through the setting of the airtight detection ring, it can not only act as the original sealing ring to avoid additional testing costs, but also collect and detect the airtightness of the battery pack, thereby realizing the airtightness test function of the battery pack and effectively reducing the cost of testing the airtightness of the battery pack.

[0028] See also Figure 1 , which is a schematic diagram of the structure of a battery pack airtightness detection device according to an embodiment of the present disclosure.

[0029] A battery pack airtightness detection device 10 of an embodiment includes an airtightness detection base 100, an airtightness detection top cover 200, and an airtightness detection ring 300. The airtightness detection base 100 is used to place the battery pack. The airtightness detection top cover 200 is arranged on the airtightness detection base 100, and the airtightness detection top cover 200 and the airtightness detection base 100 are detachably connected, and the battery pack is arranged between the airtightness detection top cover 200 and the airtightness detection base 100. The airtightness detection ring 300 is located between the airtightness detection top cover 200 and the airtightness detection base 100, and the airtightness detection ring 300 is sleeved on the battery pack, and the airtightness detection ring 300 abuts against the sealing area of ​​the battery pack, and the airtightness detection ring 300 is used to collect the contact pressure with the battery pack to detect the airtightness of the battery pack.

[0030] In this embodiment, the original sealing ring on the battery pack is replaced with the airtight detection ring 300, that is, the airtight detection component of the battery pack is used as the sealing component on the battery pack. Through the setting of the airtight detection ring 300, it can not only act as the original sealing ring to avoid additional testing costs, but also collect and detect the airtightness of the battery pack, thereby realizing the airtightness test function of the battery pack and effectively reducing the cost of testing the airtightness of the battery pack.

[0031] In one embodiment, see Figure 1 The airtight detection base 100 is provided with a receiving groove 102, the opening of the receiving groove 102 faces the airtight detection top cover 200, and the receiving groove 102 is used to receive at least part of the battery pack. In this embodiment, the receiving groove 102 is located on the airtight detection base 100, and the receiving groove 102 serves as a receiving space on the airtight detection base 100. When the battery pack is subjected to airtightness detection, at least part of the battery pack is located in the receiving groove 102, so that the battery pack is stably arranged between the airtight detection base 100 and the airtight detection top cover 200, so that the airtight detection ring 300 can seal the sealing position of the battery pack.

[0032] Furthermore, at least a portion of the airtight detection ring 300 is located in the accommodating groove 102, and the airtight detection ring 300 corresponds to the accommodating groove 102, that is, the airtight detection ring 300 and the battery pack are placed in the accommodating groove 102 synchronously, so that the connection between the battery pack and the airtight detection ring 300 is more stable.

[0033] In another embodiment, see Figure 2 The airtight detection base 100 is also provided with an installation positioning hole 104 communicating with the accommodating groove 102, and part of the airtight detection cover 200 is clamped in the installation positioning hole 104. In this embodiment, the installation positioning hole 104 is located on the airtight detection base 100. Specifically, the installation positioning hole 104 is provided at the bottom of the accommodating groove 102. The installation positioning hole 104 serves as a positioning point for the airtight detection cover 200 during installation. Through the provision of the installation positioning hole 104, it is convenient to align the airtight detection cover 200 with the airtight detection base 100, so as to facilitate the airtight detection cover 200 to accurately install the battery pack in the accommodating groove 102, thereby avoiding the situation where the battery pack is not in close contact with the airtight detection ring 300.

[0034] For further information, see Figure 2The airtight detection top cover 200 includes an airtight top plate 210 and an airtight positioning column 220 which are connected to each other. The airtight positioning column 220 is located on a side of the airtight top plate 210 close to the airtight detection base 100, and the airtight positioning column 220 is inserted into the installation positioning hole 104. In this embodiment, the airtight top plate 210 is arranged opposite to the airtight detection base 100, and the airtight top plate 210 and the airtight detection base 100 are used to clamp and fix the battery pack together. The airtight positioning column 220 corresponds to the installation positioning hole 104, and the installation positioning hole 104 not only accurately positions the airtight positioning column 220 on the airtight detection base 100, but also guides the installation of the airtight positioning column 220, so that the airtight top plate 210 and the bottom of the accommodating groove 102 always remain parallel.

[0035] Furthermore, the airtight detection top cover also includes an installation limit column connected to the airtight top plate, and the airtight detection base is also provided with an installation limit groove connected to the accommodating groove, and the installation limit column is clamped in the installation limit groove. In this embodiment, the installation limit column is located on a side of the airtight top plate close to the airtight detection base, that is, the installation limit column and the airtight positioning column are located on the same side of the airtight top plate. When the airtight positioning column is penetrated into the installation positioning hole, the installation limit column is synchronously installed in the installation limit groove to prevent the airtight positioning column from being overly embedded in the installation positioning hole, thereby preventing the airtight top plate from excessively squeezing the battery pack.

[0036] Further, see Figure 2 The airtight top plate 210 is provided with an airtight ring receiving groove 202, the opening of the airtight ring receiving groove 202 faces the airtight detection base 100, and the airtight ring receiving groove 202 is used to receive the airtight detection ring 300. In this embodiment, the airtight ring receiving groove 202 is located on a side of the airtight top plate 210 close to the airtight detection base 100, that is, the opening of the airtight ring receiving groove 202 faces the airtight detection ring 300. After the airtightness detection of the battery pack is completed, the airtight ring receiving groove 202 receives the airtight detection ring 300 to protect the airtight detection ring 300.

[0037] Further, see Figure 2The airtight detection top cover 200 further includes a fixing pin 240. The airtight top plate 210 is provided with a fixing through hole 204. The fixing pin 240 is passed through the fixing through hole 204 and connected to the airtight detection base 100. In this embodiment, the fixing through hole 204 corresponds to the fixing pin 240. A portion of the fixing pin 240 is located in the fixing through hole 204. When the airtight top plate 210 and the airtight detection base 100 jointly clamp the battery pack, the end of the fixing pin 240 passes through the fixing through hole 204 and is finally connected to the airtight detection base 100, so that the fixing pin 240 stably connects the airtight top plate 210 and the airtight detection base 100, ensuring that the battery pack is stably installed on the airtight detection base 100, so as to improve the accuracy of airtightness detection of the battery pack.

[0038] In another embodiment, see Figure 2 The airtight detection base 100 is provided with a fixing hole 106, and part of the fixing pin 240 is clamped in the fixing hole 106. After the fixing pin 240 passes through the fixing through hole 204, the end of the fixing pin 240 is opened in the fixing hole 106, so that the fixing pin 240 is stably clamped with the airtight detection base 100, which effectively improves the connection stability between the airtight top plate 210 and the airtight detection base 100.

[0039] In one of the embodiments, the present disclosure relates to a battery pack airtightness testing device, comprising a piezoelectric converter and a battery pack airtightness detection device as described in any of the above embodiments, wherein the piezoelectric converter is electrically connected to an airtightness detection ring of the battery pack airtightness detection device. In this embodiment, the battery pack airtightness detection device comprises an airtightness detection base, an airtightness detection top cover, and an airtightness detection ring; the airtightness detection base is used to place the battery pack; the airtightness detection top cover is arranged on the airtightness detection base, the airtightness detection top cover is detachably connected to the airtightness detection base, and the battery pack is arranged between the airtightness detection top cover and the airtightness detection base; the airtightness detection ring is located between the airtightness detection top cover and the airtightness detection base, the airtightness detection ring is sleeved on the battery pack, the airtightness detection ring abuts against the sealing area of ​​the battery pack, and the airtightness detection ring is used to collect contact pressure with the battery pack to detect the airtightness of the battery pack. By replacing the original sealing ring on the battery pack with an airtight detection ring, that is, using the airtight detection component of the battery pack as the sealing component on the battery pack, through the setting of the airtight detection ring, it can not only act as the original sealing ring to avoid additional testing costs, but also collect and detect the airtightness of the battery pack, thereby realizing the airtightness test function of the battery pack and effectively reducing the cost of testing the airtightness of the battery pack.

[0040] The above-described embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present disclosure. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the attached claims.

Claims

1. A battery pack airtightness detection device, characterized in that: include: An airtight detection base, wherein the airtight detection base is used to place a battery pack; An airtight detection top cover, the airtight detection top cover is arranged on the airtight detection base, the airtight detection top cover and the airtight detection base are detachably connected, and the battery pack is arranged between the airtight detection top cover and the airtight detection base; An airtight detection ring, wherein the airtight detection ring is located between the airtight detection top cover and the airtight detection base, the airtight detection ring is sleeved on the battery pack, the airtight detection ring abuts against the sealing area of ​​the battery pack, and the airtight detection ring is used to collect the contact pressure with the battery pack to detect the airtightness of the battery pack.

2. The battery pack airtightness detection device according to claim 1, characterized in that: The airtight detection base is provided with a receiving groove, the opening of the receiving groove faces the airtight detection top cover, and the receiving groove is used to accommodate at least a part of the battery pack.

3. The battery pack airtightness detection device according to claim 2, characterized in that: At least a portion of the airtight detection ring is located in the accommodating groove.

4. The battery pack airtightness detection device according to claim 2, characterized in that: The airtight detection base is also provided with an installation positioning hole communicated with the accommodating groove, and a portion of the airtight detection top cover is clamped in the installation positioning hole.

5. The battery pack airtightness detection device according to claim 4, characterized in that: The airtight detection top cover comprises an airtight top plate and an airtight positioning column which are connected to each other. The airtight positioning column is located on a side of the airtight top plate close to the airtight detection base, and the airtight positioning column is inserted into the installation positioning hole.

6. The battery pack airtightness detection device according to claim 5, characterized in that: The airtight detection top cover also includes an installation limit column connected to the airtight top plate, and the airtight detection base is also provided with an installation limit groove connected to the accommodating groove, and the installation limit column is clamped in the installation limit groove.

7. The battery pack airtightness detection device according to claim 5, characterized in that: The airtight top plate is provided with an airtight ring receiving groove, the opening of the airtight ring receiving groove faces the airtight detection base, and the airtight ring receiving groove is used to receive the airtight detection ring.

8. The battery pack airtightness detection device according to claim 5, characterized in that: The airtight detection top cover also includes a fixing pin, the airtight top plate is provided with a fixing through hole, the fixing pin is passed through the fixing through hole and is connected to the airtight detection base.

9. The battery pack airtightness detection device according to claim 8, characterized in that: The airtight detection base is provided with a fixing hole, and part of the fixing pin is fixed in the fixing hole.

10. A battery pack airtightness test device, characterized in that: It comprises a piezoelectric converter and a battery pack airtightness detection device as claimed in any one of claims 1 to 9, wherein the piezoelectric converter is electrically connected to an airtightness detection ring of the battery pack airtightness detection device.

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