Battery formation detection device and battery formation equipment

Abstract

The utility model discloses a battery formation detection device and battery formation equipment, and belongs to the technical field of battery detection, the battery formation detection device is arranged on clamping plates of the battery formation equipment, a plurality of clamping plates are arranged in an array along the thickness direction of a battery, the battery formation detection device comprises at least one first detection mechanism, a second detection mechanism and a third detection mechanism, the first detection mechanism comprises a mounting seat, the mounting seat is detachably connected to the clamping plates, and the first detection mechanism is used for measuring the distance between one group of clamping plates; and the second detection mechanism is fixedly connected to the first detection mechanism, and the second detection mechanism is used for detecting the expansion force when the battery is formed. By accurately detecting the gas production rate and the gas production rate in the formation process of the soft package battery, the abnormal gas production condition can be recognized in advance, and the device has important significance on guaranteeing the production quality of the battery, improving the production efficiency and preventing safety accidents.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection, in particular to a battery formation detection device and battery formation equipment. Background Art

[0002] Soft-pack batteries, due to their lightweight, safe, and high energy density, are widely used in mobile phones, laptops, electric vehicles, and other fields. The formation process, a key step in the production of soft-pack batteries, has a direct impact on the battery's electrochemical performance. Battery formation is the first charge-discharge cycle after battery manufacturing. Its purpose is to activate the active materials in the battery and form the SEI film at the anode.

[0003] However, during the battery formation process, a certain amount of gas is inevitably generated. The amount and rate of gas generation are directly related to the electrochemical reaction efficiency of the battery and the quality of the SEI film. Specifically, excessive gas generation or an abnormally rapid gas generation rate may cause a sharp increase in the internal pressure of the battery, which not only affects the normal charge and discharge process of the battery, but may also have an adverse effect on the formation of the SEI film, thereby shortening the battery's cycle life and even causing safety issues. Therefore, accurately detecting the gas generation amount and rate during the battery formation process and identifying abnormal gas generation in advance are of great significance for ensuring battery production quality, improving production efficiency and preventing safety accidents.

[0004] In the existing technology, formation equipment generally adopts a constant pressure formation process, but there are obvious deficiencies in the detection of abnormal gas production. In addition, due to the special structure of soft-pack batteries, they require additional auxiliary clamping force to maintain stability during the formation process, which further increases the difficulty of detection. The detection of abnormal gas production during the battery formation process mostly relies on human visual identification or temperature alarm mechanism. The former is limited by subjective judgment and differences in professional knowledge, making it difficult to formulate unified detection standards; the latter often triggers the alarm only after gas production has caused an abnormal increase in temperature, making it impossible to achieve early prevention and posing a major safety hazard.

[0005] In view of the above problems, there is an urgent need for a device that can detect the gas production amount and gas production rate during the formation process of soft-pack batteries in real time and accurately, so that timely measures can be taken when abnormal gas production is detected to prevent the occurrence of safety accidents and ensure the safety and efficiency of battery production. Utility Model Content

[0006] In response to the above-mentioned problems in the existing technology, the present invention provides a battery formation detection device and battery formation equipment, which aims to solve the problem that the detection of abnormal gas production in the existing soft-pack battery formation process relies on manual methods, which is inefficient and difficult to ensure the accuracy and timeliness of detection. To achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0007] A battery formation detection device is provided on a clamping plate of a battery formation device, wherein a plurality of clamping plates are arranged in an array along the thickness direction of the battery, and the battery formation detection device comprises:

[0008] at least one first detection mechanism, the first detection mechanism comprising a mounting base, the mounting base being detachably connected to the clamping plate, the first detection mechanism being used to measure the distance between a group of the clamping plates;

[0009] The second detection mechanism is fixedly connected to the first detection mechanism, and is used to detect the expansion force of the battery during formation.

[0010] Furthermore, the first detection mechanism includes a pair of first detection components arranged opposite to each other along the thickness direction of the battery; the first detection components correspond to the clamping plates one by one, and the first detection components can move synchronously with the clamping plates.

[0011] Furthermore, the first detection mechanism also includes a fixing seat, which is movably connected to a mounting seat on two opposite sides along the thickness direction of the battery, and the mounting seats are detachably connected to a group of the clamping plates; a pair of the first detection components are respectively arranged on the mounting seats.

[0012] Furthermore, one of the fixing seat and the mounting seat is provided with a U-shaped hole, and the other is provided with a connecting block, and the fixing seat and the mounting seat are movably connected through the U-shaped hole and the connecting block; the mounting seat is provided with a mounting groove on one side along the width direction of the battery, and the mounting groove is detachably connected to the splint by a card and plug-in method.

[0013] Furthermore, two first detection mechanisms are relatively arranged along the length direction of the battery, and the second detection mechanism is fixedly connected to one of the first detection mechanisms on both sides along the length direction of the battery. The second detection mechanism includes an elastic member and a second detection component provided on the elastic member; the elastic member is sleeved on the battery and undergoes elastic deformation when the battery is charged and expanded; the second detection component is used to detect the deformation force of the elastic member.

[0014] Furthermore, the second detection mechanism also includes two fixing components arranged opposite to each other along the length direction of the battery, and the two fixing components are respectively connected to the two fixing seats to fix the second detection mechanism between the two first detection mechanisms along the length direction of the battery, and the elastic member is sleeved on the battery through the fixing components.

[0015] Furthermore, the fixing assembly includes a clamp adjusted along the thickness direction of the battery, the clamp is clamped on two opposite sides of the thickness direction of the battery, and an embedding groove for installing the elastic member is provided on the clamp.

[0016] Furthermore, the clamp includes a first fixing plate and a second fixing plate, the first fixing plate and the second fixing plate are respectively connected to the same fixing seat, and the first fixing plate and the second fixing plate are adjustable along the thickness direction of the battery.

[0017] Furthermore, the first detection component is a distance sensor, and / or the second detection component is a tension sensor.

[0018] A battery formation device comprises a plurality of clamping plates arranged in an array along the thickness direction of the battery and the above-mentioned battery formation detection device, wherein the battery formation detection device is arranged on the clamping plates of the battery formation device.

[0019] The beneficial effects of the utility model are:

[0020] 1. The utility model provides a battery formation detection device and battery formation equipment. By setting a first detection mechanism and a second detection mechanism, the device can accurately detect the gas production volume and gas production rate during the formation process of soft-pack batteries, and can identify abnormal gas production in advance. This is of great significance for ensuring battery production quality, improving production efficiency and preventing safety accidents.

[0021] 2. The battery formation detection device and battery formation equipment provided by the present invention ensure that the elastic part is always installed in the same position for soft-pack batteries of the same specifications and models by setting a fixed component and an elastic part structure, thereby ensuring the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of a battery formation detection device provided by the utility model from a first perspective;

[0023] Figure 2 This is a structural schematic diagram of a battery formation detection device provided by the present invention from a second perspective;

[0024] Figure 3 This is a cross-sectional view of the U-shaped hole and the connecting block provided by the present invention in a connected state;

[0025] In the accompanying drawings: 11, first detection component; 12, fixing seat; 13, mounting seat; 14, mounting groove; 15, U-shaped hole; 16, connecting block; 21, elastic member; 211, second detection component; 22, clamp; 221, first fixing plate; 222, second fixing plate; 23, embedded groove. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the present invention is not limited to the following embodiments.

[0027] Example 1:

[0028] See attached Figures 1-2 This embodiment provides a battery formation detection device, which can be set on the clamping plate of the battery formation equipment. The battery has three directions, namely the battery length direction, the battery width direction and the battery thickness direction. Figure 1 and Figure 2 As shown, the X direction is along the length of the battery, the Y direction is along the width of the battery, and the Z direction is along the thickness of the battery. A plurality of clamping plates are arranged in an array along the thickness of the battery. The battery formation detection device includes at least one first detection mechanism, which includes a mounting base 13. The mounting base 13 can be used to mount the battery formation detection device on the clamping plate. The mounting base 13 is detachably connected to the clamping plate. The first detection mechanism is used to measure the distance between a group of clamping plates to obtain the gas production rate of the battery during the formation process. The second detection mechanism is also included. The second detection mechanism is fixedly connected to the first detection mechanism and is used to detect the expansion force of the battery during formation to detect whether the gas production during the formation process exceeds a preset value.

[0029] Due to the unique structure of soft-pack batteries, they require additional auxiliary clamping force to maintain stability during the formation process, and a constant-pressure formation process is generally employed. Therefore, during the formation process, the pressure between the two adjacent clamps holding the soft-pack battery is constant. As gas production increases, the pressure within the soft-pack battery increases accordingly. To maintain a constant pressure between the two clamps, the position of the clamps holding the soft-pack battery changes with the pressure, causing the distance between the two clamps to change. Furthermore, the faster the gas production rate, the more pronounced the distance change. Therefore, the gas production rate during the formation process can be determined by measuring the change in distance between the two clamps. A specific standard can also be set, with an abnormality alarm device triggered immediately when the distance change exceeds the set standard. In this embodiment, for example, the first detection mechanism can be a distance sensor, with one of the two clamps holding the soft-pack battery having a transmitting terminal and the other having a receiving terminal. By measuring the change in distance between adjacent clamps during the formation process, the gas production rate can be determined, enabling identification of abnormal gas production.

[0030] At the same time, during the formation process, the gas generated by the formation is collected by the air bag connected to the soft-pack battery, and as the gas production increases, the air bag expands. If abnormal gas production occurs, for example, the gas production is too large, the expansion size of the air bag may exceed the normal size. Therefore, a battery formation detection device provided in this embodiment also includes a second detection mechanism, which is used to detect in real time the expansion force of the air bag area on the soft-pack battery during battery formation, so as to detect whether the gas production during the formation process exceeds a preset value. In this embodiment, for example, the second detection mechanism can be a circle of elastic members 21 arranged on the outer periphery of the air bag, the elastic member 21 is retractable, and a safety threshold mark can be set on the elastic member 21; when the air bag expands, the elastic member 21 and the air bag expand and contract synchronously, and when it is detected that the elastic member 21 expands and contracts beyond the safety threshold mark, the abnormal alarm device is immediately triggered.

[0031] The utility model provides a battery formation detection device and battery formation equipment, which, by providing a first detection mechanism and a second detection mechanism, accurately detect the gas production amount and gas production rate during the formation process of a soft-pack battery, can identify abnormal gas production in advance, prevent the occurrence of safety accidents, and ensure the safety and efficiency of battery production.

[0032] Example 2:

[0033] See attached Figures 1-2 Based on the first embodiment, specifically, in this embodiment, the first detection mechanism includes a pair of first detection components 11 arranged opposite to each other along the thickness direction of the battery. The first detection components 11 correspond to the clamping plates one by one, and the first detection components 11 can move synchronously with the clamping plates. The first detection components 11 can be used to measure the distance between the clamping plates.

[0034] Mode 1 for the first detection assembly 11 to move synchronously with the clamping plates: A pair of first detection assemblies 11 can be fixed on two clamping plates respectively and move synchronously with the clamping plates.

[0035] The second way for the first detection component 11 to move synchronously with the splint: the first detection mechanism also includes a fixed seat 12, and the fixed seat 12 is movably connected to a mounting seat 13 on both sides of the opposite sides along the thickness direction of the battery, and the mounting seats 13 are detachably connected to a group of splints; a pair of first detection components 11 are respectively provided on the mounting seats 13. A mounting groove 14 for cooperating with the splint installation can be provided on the mounting seat 13, so that the first detection mechanism can be quickly installed on the splint. Since the mounting seat 13 is movably connected to the fixed seat 12, when the splint moves, the mounting seat 13 can move synchronously with the splint. The first detection component 11 can be respectively provided on two mounting seats 13, so that the first detection component 11 can move synchronously with the splint. Among them, the specific form of the movable connection between the fixed seat 12 and the mounting seat 13 is: one of the fixed seat 12 and the mounting seat 13 is provided with a connecting socket, and the other is provided with a connecting plug, such as Figure 3 As shown, one of the fixing seat 12 and the mounting seat 13 is provided with a U-shaped hole 15 , and the other is provided with a connecting block 16 , and the fixing seat 12 and the mounting seat 13 are movably connected through the U-shaped hole 15 and the connecting block 16 .

[0036] In this embodiment, the first detection component 11 may be a distance sensor. Specifically, a pair of first detection components 11 are respectively provided on two mounting bases 13. It can be understood that the transmitting end of the distance sensor is provided on one of the mounting bases 13, and the receiving end of the distance sensor is provided on the other mounting base 13. It can be understood that in this embodiment, the specific model of the first detection component 11 is not limited, and the first detection component 11 can be implemented using existing technology.

[0037] Example 3:

[0038] See attached Figures 1-2. On the basis of the second embodiment, in this embodiment, two first detection mechanisms are relatively arranged along the length direction of the battery, and the second detection mechanism is fixedly connected to a first detection mechanism on both sides of the length direction of the battery. The second detection mechanism includes an elastic member 21 and a second detection component 211 provided on the elastic member 21, wherein the elastic member 21 can be directly mounted on the air bag of the soft-pack battery, and elastically deforms as the battery expands during formation. The second detection component 211 is used to detect the deformation force of the elastic member 21, and the second detection component 211 can be a tension sensor. During the formation process, the air bag expands as the gas production increases, and the elastic member 21 mounted on the outer periphery of the air bag is stretched synchronously with the air bag. The second detection component 211 can be used to detect the deformation force of the elastic member 21 in real time. A safety threshold can be set for soft-pack batteries of the same specification and model. When the second detection component 211 detects that the deformation force of the elastic member 21 exceeds the safety threshold, the abnormal alarm device is immediately triggered.

[0039] In this embodiment, the second detection mechanism also includes two fixing components arranged relatively along the length direction of the battery, which are respectively connected to the two fixing seats 12 through the fixing components, so that the second detection mechanism is fixedly connected between the two first detection mechanisms along the length direction of the battery, that is, the elastic member 21 is sleeved on the air bag of the soft-pack battery through the fixing component. The setting of the fixing component facilitates the installation and fixation of the elastic member 21 and prevents the elastic member 21 from slipping, thereby ensuring that the elastic member 21 is sleeved on the same position of the air bag for soft-pack batteries of the same specifications and models.

[0040] Specifically, the fixing assembly may include a pair of clamps 22 that are adjusted along the thickness direction of the battery. The clamps 22 are clamped on opposite sides of the battery in the thickness direction. The clamps 22 are provided with an embedding groove 23 for mounting the elastic member 21. The elastic member 21 is mounted on the clamps 22 and the periphery of the air bag through the embedding groove 23. The structure of the clamps 22 can be realized by using existing technology; Figure 2 As shown, the clamp 22 includes a first fixing plate 221 and a second fixing plate 222, which are detachably connected, for example, by bolts. An embedding groove 23 is provided on the first fixing plate 221 and / or the second fixing plate 222. Specifically, the embedding groove 23 can be a U-shaped groove opening in the length direction of the battery. Since two fixing components are arranged relative to each other along the length direction of the battery, that is, two clamps 22 are included in the length direction of the battery, and at least two embedding grooves 23 are provided on the two clamps 22 facing each other, so that the elastic member 21 can be clamped in the embedding groove 23 and surrounded by the clamp 22 and the air bag. It should be noted that multiple embedding grooves 23 can be arranged in an array in the width direction of the battery to facilitate height adjustment of the elastic member 21, thereby adapting to batteries of different sizes.

[0041] In this embodiment, the second detection component 211 may be a tension sensor. It is understood that in this embodiment, the specific model of the second detection component 211 is not limited, and the second detection component 211 may be implemented using existing technology.

[0042] Example 4:

[0043] See attached Figures 1-2 Based on the third embodiment, the present invention further provides a battery formation device, comprising the battery formation detection device of any of the above embodiments, and further comprising a plurality of clamping plates arranged in an array along the thickness direction of the battery, wherein the battery formation detection device is arranged on the clamping plates of the battery formation device.

[0044] During formation, the soft-pack battery is clamped and fixed by two adjacent clamping plates, and a battery formation detection device is installed on the two clamping plates corresponding to the soft-pack battery. The battery formation detection device performs real-time detection of the gas production rate and gas production of the soft-pack battery during the formation process. It is understandable that the battery formation detection device can also be installed between two non-adjacent clamping plates. For example, three clamping plates clamp two batteries, and the battery formation detection device is installed between the outermost clamping plates, so that two batteries are detected as a group. The gas production rate and gas production of the soft-pack battery during the formation process can also be detected in real time, which also reduces the number of battery formation detection devices and saves working space. Of course, according to the battery model, three, four, etc. batteries can be used as a group, and the battery formation detection device can be installed between the outermost clamping plates. This is not limited here.

[0045] 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, and do not indicate or imply 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 a limitation to the present invention.

[0046] In the description of the present invention, "first feature" and "second feature" may include one or more such features.

[0047] In the description of the present invention, “plurality” means two or more.

[0048] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact via another feature therebetween.

[0049] In the description of the present invention, a first feature “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0050] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," and "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of these terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0051] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A battery formation detection device, characterized in that: The battery formation detection device is arranged on a clamping plate of the battery formation equipment, and a plurality of clamping plates are arranged in an array along the thickness direction of the battery. The battery formation detection device includes: At least one first detection mechanism, the first detection mechanism comprising a mounting seat (13), the mounting seat (13) being detachably connected to the clamping plate, the first detection mechanism being used to measure the distance between a group of the clamping plates; The second detection mechanism is fixedly connected to the first detection mechanism, and is used to detect the expansion force of the battery during formation.

2. A battery formation detection device according to claim 1, characterized in that: The first detection mechanism comprises a pair of first detection components (11) arranged opposite to each other along the thickness direction of the battery; the first detection components (11) correspond to the clamping plates one by one, and the first detection components (11) can move synchronously with the clamping plates.

3. A battery formation detection device according to claim 2, characterized in that: The first detection mechanism further comprises a fixing seat (12), wherein the fixing seat (12) is movably connected to a mounting seat (13) on two opposite sides along the thickness direction of the battery, and the mounting seats (13) are detachably connected to a group of the clamping plates; and a pair of the first detection components (11) are respectively arranged on the mounting seats (13).

4. A battery formation detection device according to claim 3, characterized in that: One of the fixing seat (12) and the mounting seat (13) is provided with a U-shaped hole (15), and the other is provided with a connecting block (16); the fixing seat (12) and the mounting seat (13) are movably connected via the U-shaped hole (15) and the connecting block (16); the mounting seat (13) is provided with a mounting groove (14) on one side along the width direction of the battery; the mounting groove (14) is detachably connected to the clamping plate via a snap-in or plug-in manner.

5. A battery formation detection device according to claim 3, characterized in that: Two first detection mechanisms are arranged opposite to each other along the length direction of the battery, and the second detection mechanism is fixedly connected to one of the first detection mechanisms on both sides along the length direction of the battery. The second detection mechanism comprises an elastic member (21) and a second detection assembly (211) arranged on the elastic member (21); the elastic member (21) is sleeved on the battery and elastically deforms when the battery is expanded; the second detection assembly (211) is used to detect the deformation force of the elastic member (21).

6. A battery formation detection device according to claim 5, characterized in that: The second detection mechanism further comprises two fixing assemblies arranged opposite to each other along the length direction of the battery, the two fixing assemblies being respectively connected to the two fixing seats (12) so as to fix the second detection mechanism between the two first detection mechanisms along the length direction of the battery, and the elastic member (21) being sleeved on the battery through the fixing assemblies.

7. A battery formation detection device according to claim 6, characterized in that: The fixing assembly comprises a clamp (22) adjusted along the thickness direction of the battery, the clamp (22) clamps two opposite sides of the battery in the thickness direction, and an embedding groove (23) for mounting the elastic member (21) is provided on the clamp (22).

8. A battery formation detection device according to claim 7, characterized in that: The clamp (22) comprises a first fixing plate (221) and a second fixing plate (222), wherein the first fixing plate (221) and the second fixing plate (222) are respectively connected to the same fixing seat (12), and the distance between the first fixing plate (221) and the second fixing plate (222) is adjustable along the thickness direction of the battery.

9. A battery formation detection device according to any one of claims 5 to 8, characterized in that: The first detection component (11) is a distance sensor, and / or the second detection component (211) is a tension sensor.

10. A battery formation device, characterized in that: It comprises a plurality of the clamping plates arranged in an array along the thickness direction of the battery and a battery formation detection device according to any one of claims 1 to 9, wherein the battery formation detection device is arranged on the clamping plates of the battery formation equipment.

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