Battery clamp

Abstract

The utility model discloses a battery clamp which comprises an upper clamp, a lower clamp, a self-locking mechanism and a liquid injection system, the lower clamp is used for bearing the small integrated module battery, and the small integrated module battery is a lithium battery with a liquid injection opening formed in the top. According to the utility model, the upper clamp and the lower clamp are matched with the self-locking mechanism to lock the small integrated module battery, the accurate butt joint of the liquid injection port and the liquid discharge port of the lithium battery is realized, the integrated retainer cup and a plurality of liquid storage chambers in the integrated retainer cup are adopted for negative-pressure liquid injection, the liquid injection quality and efficiency are improved, and the production cost is reduced. Each cavity in the multiple cavities of the single module injects liquid independently and does not influence each other, the liquid injection device is suitable for liquid injection between single battery packs with small gaps, the installation space is saved, the wall thickness is increased, the safety performance is obviously improved, the outer walls of the liquid storage cavities are not prone to deformation, and therefore the liquid injection amount of each liquid storage cavity is conveniently and accurately metered, and the liquid injection efficiency is improved. Accurate control over liquid injection of the battery can be achieved in the production process of the lithium battery.

Description

Technical Field

[0001] The utility model relates to the field of battery clamp tooling, in particular to a battery clamp. Background Art

[0002] When lithium battery is injected, manual injection is usually used to perform one-to-one injection processing. This method has problems such as low injection accuracy, low production efficiency, and poor safety. In order to improve production efficiency and injection accuracy, two types of automatic electrolyte injection machines, forward injection type and vacuum back suction type, are used in the prior art.

[0003] For example, the utility model patent with application number 201420607599.0 discloses a square aluminum shell lithium ion battery injection fixture. Aiming at the low injection volume precision control, low efficiency and poor quality stability in the existing square aluminum shell lithium ion battery manual injection process, the following injection mechanism is developed to accurately control the injection. The fixture is composed of a support frame (1), an injection cylinder (2), an injection head (3), a sealing elastic silica gel 4, an elastic push rod (5) and a height adjustment screw (6). The mechanism is used in combination with a vacuum box and has the characteristics of simple structure, low preparation cost, simple and convenient adjustment, precise control precision, practicality and high efficiency.

[0004] In order to make lithium batteries more applicable to all aspects of life, our company has developed an all-in-one module battery. Compared with the original module battery, this type of battery is directly assembled from the battery cell into a module battery. Due to the small gap between the single cells, the traditional single-cavity sleeve cup is difficult to install, and the inner wall thickness of the single-cavity sleeve cup is small. The injection measuring cylinder in the above-mentioned scheme introduced is a separate cavity structure, which is not convenient for processing such module batteries. For example, if a single-cavity sleeve cup is used for one-to-one injection processing of lithium batteries, the efficiency is too low. In addition, this type of module battery requires negative pressure injection. When the outer wall of the single-cavity sleeve cup is thin, it is easy to be compressed and deformed, which affects the accuracy and even poses a safety hazard.

[0005] The utility model is developed to solve the above problems and is suitable for the development and production of new products and meets the improved liquid injection fixture required for the production of new products. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a battery clamp suitable for the injection of liquid between single battery packs with small gaps in view of the deficiencies of the above-mentioned prior art. It not only saves installation space, but also increases the wall thickness, and the safety performance is also significantly improved. The outer wall of the liquid storage chamber is not easy to deform, thereby facilitating the accurate measurement of the injection amount of each liquid storage chamber.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A battery clamp comprises an upper clamp, a lower clamp, a self-locking mechanism and a liquid injection system;

[0009] The lower fixture is used to carry a small integrated module battery, which is a lithium battery with a liquid injection port opened on the top;

[0010] The upper fixture includes an upper cover plate and an integrated sleeve cup;

[0011] The self-locking mechanism locks the upper clamp and the lower clamp, and fixes and clamps the small integrated module battery;

[0012] The integrated sleeve cup corresponds to the small integrated module battery one by one. A plurality of liquid storage chambers are provided inside the integrated sleeve cup, and two adjacent liquid storage chambers share an inner wall. A lower liquid port is provided at the bottom of the liquid storage chamber to connect with the liquid filling port of the lithium battery.

[0013] The upper cover plate is buckled on the top of the integrated sleeve cup to isolate the multiple liquid storage chambers in a closed manner;

[0014] The liquid injection system is connected to the liquid injection pump to inject electrolyte into the liquid storage chamber.

[0015] Preferably, the upper fixture further comprises a mounting plate, a limiting block is integrally provided on one side of the bottom of the mounting plate, and the integral sleeve cup penetrates the mounting plate and is fixedly connected to the through opening.

[0016] Preferably, a pin hole is provided on the integrated sleeve cup, a pin is interference-fitted in the pin hole, and the upper cover plate and the integrated sleeve cup are fixedly combined by the pin and the pin hole.

[0017] Preferably, a flared groove is provided at the top of the liquid storage chamber, and a sealing strip is installed inside the flared groove.

[0018] Preferably, the one-piece cup is made of PE material, and the sealing strip is made of rubber material.

[0019] Preferably, the lower fixture comprises a bottom plate and a battery positioning block;

[0020] The bottom plate is provided with a limit groove matching the limit block;

[0021] The battery positioning block positions and snaps the small integrated module battery.

[0022] Preferably, a positioning hole is provided on the outer side of the mounting plate, and a positioning column is integrally provided on the top of the bottom plate;

[0023] The installation plate and the bottom plate are arranged in parallel, and the positioning holes are plugged into the positioning columns correspondingly.

[0024] Preferably, the number of the self-locking mechanisms is set to four, and the four self-locking mechanisms are evenly distributed at the four corners of the base plate. The self-locking mechanism includes a lock, a mounting seat, a limit spring and a clamping shaft. The mounting seat is fixed on the base plate, and the lock and the mounting seat are hingedly arranged. The clamping shaft is fixed in a groove on the outer side of the mounting plate. A bayonet matching the clamping shaft is provided at the end of the lock away from the mounting seat, and the bayonet is clamped on the clamping shaft to lock the upper clamp and the lower clamp.

[0025] Preferably, the limit spring is a torsion spring, which is sleeved on the outside of the hinge shaft between the lock buckle and the mounting seat and applies a torsional force to the lock buckle to clamp the lock buckle's bayonet onto the clamping shaft.

[0026] Preferably, the injection system comprises an injection needle and an injection nozzle;

[0027] The injection needle is inserted into the integrated sleeve cup and communicated with the liquid storage chamber;

[0028] The injection nozzle is connected to the end of the injection needle through an injection hose;

[0029] The electrolyte is pumped into the injection nozzle through the injection pump.

[0030] The utility model has the following beneficial effects:

[0031] By utilizing the upper and lower clamps in conjunction with the self-locking mechanism to lock the small integrated module battery, and achieving precise docking between the lithium battery filling port and the lower liquid port, an integrated sleeve cup and multiple liquid storage chambers inside it are used for negative pressure injection to improve the quality and efficiency of injection. Each cavity in a single module with multiple cavities is injected independently without affecting each other, which is suitable for injection between single battery packs with small gaps. It not only saves installation space, but also increases the wall thickness and significantly improves safety performance. The outer wall of the liquid storage chamber is not easily deformed, which facilitates accurate measurement of the injection volume of each liquid storage chamber, and can accurately control the moisture content of the battery cell during the pre-embedded production process of the lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a three-dimensional diagram of the overall structure of a battery clamp of the utility model;

[0033] Figure 2 This is a three-dimensional diagram of the upper clamp structure of a battery clamp of the utility model;

[0034] Figure 3 This is a three-dimensional diagram of the structure of an integrated cup and liquid injection system of a battery clamp of the utility model;

[0035] Figure 4 It is a top view of an integrated sleeve cup of a battery clamp of the utility model;

[0036] Figure 5 This utility model Figure 4AA section view in.

[0037] Among them are:

[0038] Upper clamp-1; lower clamp-2; self-locking mechanism-3; injection system-4;

[0039] Upper cover plate-11; integrated sleeve cup-12; mounting plate-13; limit block-14;

[0040] Base plate-21; Battery positioning block-22;

[0041] Lock buckle-31; mounting seat-32; limit spring-33; clamping shaft-34; bayonet-35;

[0042] Injection needle-41; injection nozzle-42;

[0043] Liquid storage chamber-121; lower liquid port-122; pin hole-123; expansion groove-124;

[0044] Positioning hole - 131;

[0045] Positioning column-211. DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0047] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not indicate the importance of the components, and therefore cannot be understood as a limitation on the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention.

[0048] like Figure 1-5 As shown, a battery clamp comprises an upper clamp 1, a lower clamp 2, a self-locking mechanism 3 and a liquid injection system 4;

[0049] The lower fixture 2 is used to carry a small integrated module battery, which is a lithium battery with a liquid injection port opened at the top;

[0050] The upper fixture 1 includes an upper cover plate 11 and an integrated sleeve cup 12;

[0051] The self-locking mechanism 3 locks the upper clamp 1 and the lower clamp 2 to fix and clamp the small integrated module battery;

[0052] The integrated sleeve cup 12 corresponds to the small integrated module battery one by one. A plurality of liquid storage chambers 121 are provided inside the integrated sleeve cup 12. Two adjacent liquid storage chambers 121 share an inner wall. The thickness of the existing single-cavity sleeve cup is usually less than 10 mm, while the common inner wall in the present invention is set to 14±0.5 mm, which not only saves installation space, but also increases the wall thickness, and significantly improves the safety performance. It can be better suitable for negative pressure injection. The outer wall of the liquid storage chamber 121 is not easy to deform, so it is convenient to accurately measure the injection amount of each liquid storage chamber 121, and improve the injection accuracy. The bottom end of the liquid storage chamber 121 is provided with a lower liquid port 122 that docks with the lithium battery injection port;

[0053] The upper cover plate 11 is buckled on the top of the integrated sleeve cup 12 to isolate the multiple liquid storage chambers 121 in a closed manner. Specifically, a pin hole 123 is provided on the integrated sleeve cup 12, and a pin is interference-fitted in the pin hole 123. The upper cover plate 11 and the integrated sleeve cup 12 are fixedly combined by the pin and the pin hole 123. The upper cover plate 11 can be set as a plurality of panels matching a single integrated sleeve cup 12, or can be set as a panel matching a plurality of integrated sleeve cups 12. A flared groove 124 is provided at the top of the liquid storage chamber 121, and a sealing strip is installed inside the flared groove 124. The integrated sleeve cup 12 is made of PE material, and the sealing strip is made of rubber material. After the sealed installation is closed and isolated, negative pressure injection is performed and then the electrolyte flows into the lithium battery while standing.

[0054] The liquid injection system 4 is connected to a liquid injection pump to inject electrolyte into the liquid storage chamber 121 .

[0055] Specifically, the upper fixture 1 also includes a mounting plate 13, a limiting block 14 is integrally provided on one side of the bottom of the mounting plate 13, and the integrated sleeve cup 12 penetrates the mounting plate 13 and is fixedly connected to the through opening, so that the lower liquid port 122 can be connected to the lithium battery filling port;

[0056] In addition, in order to improve the accuracy and stability of the docking combination of the upper clamp 1 and the lower clamp 2, thereby ensuring the efficiency and stability of battery installation, and achieving the purpose of accurate docking of the lithium battery injection port and the lower liquid port 122, the following design is made:

[0057] The lower fixture 2 includes a bottom plate 21 and a battery positioning block 22;

[0058] The bottom plate 21 is provided with a limiting groove matching the limiting block 14;

[0059] The battery positioning block 22 positions and engages the small integrated module battery, quickly positions and installs the small integrated module battery, and prevents the small integrated module battery from sliding or deviating.

[0060] A positioning hole 131 is provided on the outside of the mounting plate 13, and a positioning column 211 is integrally provided on the top of the bottom plate 21;

[0061] The mounting plate 13 is parallel to the bottom plate 21 , and the positioning holes 131 are correspondingly plugged into the positioning posts 211 to ensure that the upper fixture 1 and the lower fixture 2 are accurately docked, and after docking, the electrolyte dripping from the lower liquid port 122 can just fall into the lithium battery injection port.

[0062] Specifically, the number of self-locking mechanisms 3 is set to four, and the four self-locking mechanisms 3 are evenly distributed at the four corners of the base plate 21. The self-locking mechanism 3 includes a lock buckle 31, a mounting seat 32, a limit spring 33 and a clamping shaft 34. The mounting seat 32 is fixed on the base plate 21, the lock buckle 31 and the mounting seat 32 are hingedly arranged, the clamping shaft 34 is fixed in the groove on the outer side of the mounting plate 13, and the end of the lock buckle 31 away from the mounting seat 32 is provided with a bayonet 35 matching the clamping shaft 34, and the bayonet 35 is clamped on the clamping shaft 34 to lock the upper clamp 1 and the lower clamp 2.

[0063] Specifically, the limit spring 33 is a torsion spring, which is sleeved on the outside of the hinge shaft between the lock buckle 31 and the mounting seat 32, and applies a torsional force to the lock buckle 31, so that the bayonet 35 of the lock buckle 31 is clamped on the clamping shaft 34;

[0064] In the initial state, the self-locking mechanism 3 is subjected to the torsion force of the torsion spring, so that the lock buckle 31 tilts upward. During docking installation, it is pressed down. After the upper clamp 1 and the lower clamp 2 are combined, the lock buckle 31 is released and fast locking is achieved.

[0065] Specifically, the injection system 4 includes an injection needle 41 and an injection nozzle 42;

[0066] The injection needle 41 is inserted into the integrated sleeve cup 12 and communicates with the liquid storage chamber 121;

[0067] The injection nozzle 42 is connected to the end of the injection needle 41 through an injection hose;

[0068] The electrolyte is pumped into the injection nozzle 42 through the injection pump;

[0069] The connecting structure of the injection needle 41, the injection nozzle 42 and the injection hose has a certain length, so that it is easy to extend and lead out, and it is also easy to connect the injection pump to the multiple integrated sleeve cups 12 distributed in a matrix.

[0070] The steps for using this fixture to inject liquid into the integrated module battery are as follows:

[0071] S1, integrated module battery incoming materials, NG are removed, OK are loaded on trays;

[0072] S2, the battery positioning block 22 of the lower fixture 2 is used to position and clamp the small integrated module battery. After the battery is fully filled, the upper fixture 1 is sent in and pressed down. After the liquid injection nozzle 42 is sealed, the self-locking mechanism 3 locks the small integrated module battery between the upper fixture 1 and the lower fixture 2;

[0073] S3, using a tray to transfer the upper fixture 1, the lower fixture 2 and the small integrated module battery assembly to the injection station, and the injection pump pumps electrolyte into each liquid storage chamber 121;

[0074] S4. Send to the static station for static placement, then remove the tray and unload the material.

[0075] S5, the upper fixture 1 and the lower fixture 2 are separated, the integrated cup 12 and the liquid injection nozzle 42 are cleaned and waited, and the lower fixture 2 is ready for loading.

[0076] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A battery clamp, characterized in that: It comprises an upper clamp (1), a lower clamp (2), a self-locking mechanism (3) and a liquid injection system (4); The lower fixture (2) is used to carry a small integrated module battery, which is a lithium battery with a liquid injection port opened at the top; The upper fixture (1) comprises an upper cover plate (11) and an integrated sleeve cup (12); The self-locking mechanism (3) locks the upper clamp (1) and the lower clamp (2) together, and fixes and clamps the small integrated module battery; The integrated sleeve cup (12) corresponds to the small integrated module battery one by one, a plurality of liquid storage chambers (121) are provided inside the integrated sleeve cup (12), and two adjacent liquid storage chambers (121) share an inner wall, and a lower liquid port (122) is provided at the bottom end of the liquid storage chamber (121) and is connected to the liquid filling port of the lithium battery; The upper cover plate (11) is buckled onto the top of the integrated sleeve cup (12) to isolate the multiple liquid storage chambers (121) in a closed manner; The liquid injection system (4) is connected to a liquid injection pump to inject electrolyte into the liquid storage chamber (121).

2. A battery clamp according to claim 1, characterized in that: The upper clamp (1) further comprises a mounting plate (13), a limiting block (14) being integrally provided on one side of the bottom of the mounting plate (13), and the integral sleeve cup (12) penetrates the mounting plate (13) and is fixedly connected to the through opening.

3. A battery clamp according to claim 1, characterized in that: A pin hole (123) is provided on the integrated sleeve cup (12), a pin is interference-fitted in the pin hole (123), and the upper cover plate (11) and the integrated sleeve cup (12) are fixedly assembled via the pin and the pin hole (123).

4. A battery clamp according to claim 3, characterized in that: The top of the liquid storage chamber (121) is provided with an expansion groove (124), and a sealing strip is installed inside the expansion groove (124).

5. A battery clamp according to claim 4, characterized in that: The one-piece sleeve cup (12) is made of PE material, and the sealing strip is made of rubber material.

6. A battery clamp according to claim 2, characterized in that: The lower fixture (2) comprises a bottom plate (21) and a battery positioning block (22); A limit groove matching the limit block (14) is provided on the bottom plate (21); The battery positioning block (22) positions and engages the small integrated module battery.

7. A battery clamp according to claim 6, characterized in that: A positioning hole (131) is provided on the outside of the mounting plate (13), and a positioning column (211) is integrally provided on the top of the bottom plate (21); The mounting plate (13) and the bottom plate (21) are arranged in parallel, and the positioning holes (131) and the positioning columns (211) are plugged in correspondingly.

8. A battery clamp according to claim 1, characterized in that: The number of the self-locking mechanisms (3) is set to four, and the four self-locking mechanisms (3) are evenly distributed at the four corners of the base plate (21). The self-locking mechanism (3) comprises a lock buckle (31), a mounting seat (32), a limit spring (33) and a clamping shaft (34). The mounting seat (32) is fixed on the base plate (21), and the lock buckle (31) and the mounting seat (32) are hingedly arranged. The clamping shaft (34) is fixed in a slot on the outer side of the mounting plate (13). The end of the lock buckle (31) away from the mounting seat (32) is provided with a clamping mouth (35) matching the clamping shaft (34). The clamping mouth (35) is clamped on the clamping shaft (34) to lock the upper clamp (1) and the lower clamp (2).

9. A battery clamp according to claim 8, characterized in that: The limit spring (33) is a torsion spring which is sleeved on the outside of the hinge shaft between the lock buckle (31) and the mounting seat (32) and applies a torsional force to the lock buckle (31) to clamp the bayonet (35) of the lock buckle (31) onto the clamping shaft (34).

10. A battery clamp according to claim 1, characterized in that: The injection system (4) comprises an injection needle (41) and an injection nozzle (42); The injection needle (41) is inserted into the integrated sleeve cup (12) and communicates with the liquid storage chamber (121); The liquid injection nozzle (42) is connected to the end of the liquid injection needle (41) via a liquid injection hose; The electrolyte is pumped into the injection nozzle (42) via an injection pump.

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