Pole structure of storage battery

Abstract

The utility model discloses a pole structure of a storage battery, which belongs to the technical field of batteries and comprises a battery cover and a pole busbar, a pole hole is arranged on the battery cover, a pole is arranged on the pole busbar, telescopic acid-resistant rubber is sleeved outside the pole, and the pole hole is communicated with the pole hole. And the telescopic acid-resistant rubber is in the shape of a cone of which the radial size is gradually reduced from the inside of the battery cover to the outside of the battery cover and is matched with the pole hole. According to the scheme, the telescopic acid-resistant rubber is added between the pole and the pole hole, the sealing effect of the storage battery at the pole hole is realized, and after the service time of the storage battery is prolonged, the volume of a corrosion layer generated in the storage battery is increased, so that the volume of the pole plate is expanded, and the matching of the pole and the pole hole is further promoted; and the telescopic acid-resistant rubber can relieve the pressure generated by the expansion of the polar plate on one hand, and can promote the interference fit between the polar column and the polar column hole on the other hand, so that the sealing effect is further improved, and the service life of the battery is prolonged.

Description

Technical Field

[0001] The utility model relates to a battery structure, more specifically, to a battery pole structure. Background Art

[0002] During the recycling process of lead-acid batteries, after the corrosion reaction occurs in the positive plate grid, the positive plate will generate a corrosion layer composed of lead oxide, and the volume increases by 22% to 23%; at the same time, the plate grid is corroded by Pb to produce lead dioxide, the molecular volume increases by 1.4 times, and the linear size of the plate grid increases; at the same time, the expansion of the active material during the cycle will also cause the plate to grow. During the growth of the plate, the upward stress is transmitted to the battery post through the bus. In the traditional sealing structure, the terminal and the battery cover are a glue-sealed fixed structure, and the post terminal has no upward space. Under the stress of the growing plate, the structure of the sealant can easily be destroyed, causing battery leakage, and even damaging the battery cover, causing the battery seal to fail, and ultimately leading to damage to the entire battery.

[0003] For example: Chinese patent announcement number CN205004381U, announcement date January 27, 2016, the name of the utility model is a battery anti-growth straight pole terminal sealing structure, the application discloses a battery pole sealing structure, including a battery cover pole hole, a straight pole terminal, an O-ring and a protective cover; the outer side of the protective cover is provided with an outer O-ring mounting groove that matches the groove of the battery cover pole hole, the outer O-ring mounting groove is provided with an outer O-ring, and the side of the straight pole body is provided with a double inner O-ring mounting groove, and the double inner O-ring mounting grooves are both provided with inner O-rings. This solution can prevent the growth of the positive plate and cause the battery seal to fail. This solution uses two sealing rings for sealing. Due to the strong permeability of sulfuric acid, the two-ring sealing still has a large risk of "acid creep". Utility Model Content

[0004] The utility model overcomes the problem of battery sealing failure caused by expansion of the internal plates of the existing battery, and provides a battery pole structure. This solution can release expansion stress during the expansion of the plates and improve the sealing performance of the battery.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a battery pole structure, including a battery cover and a pole busbar, the battery cover is provided with a pole hole, the pole busbar is provided with a pole, the pole is provided with a retractable acid-resistant rubber on the outside, the retractable acid-resistant rubber is a cone with a gradually decreasing radial size from the inside of the battery cover to the outside of the battery cover and is matched with the pole hole. This solution adds retractable acid-resistant rubber between the pole and the pole hole to achieve a sealing effect of the battery at the pole hole, and after the battery is used for a longer time, the volume of the corrosion layer generated inside the battery increases, causing the volume of the pole plate to expand, thereby further promoting the matching of the pole and the pole hole. The retractable acid-resistant rubber can, on the one hand, relieve the pressure generated by the expansion of the pole plate, and on the other hand, it can also promote the interference fit between the pole and the pole hole, further improving the sealing effect, thereby increasing the service life of the battery.

[0006] Preferably, the pole busbar further includes a pole bottom bar integrally formed with the pole, wherein the radial dimension of the pole bottom bar is larger than the radial dimension of the pole. The pole bottom bar is used to secure the pole and can also contact all positive or negative plates to perform a conductive busbar function. Therefore, the radial dimension of the pole bottom bar needs to be larger than the radial dimension of the pole to ensure busbar function.

[0007] Preferably, an epoxy colored glue is provided between the pole and the retractable acid-resistant rubber, and the epoxy colored glue is used to fix the pole and the retractable acid-resistant rubber so that the pole and the retractable acid-resistant rubber are fixed as one body.

[0008] Preferably, one end of the stretchable acid-resistant rubber abuts the bottom bar of the pole. To ensure a secure fit of the stretchable acid-resistant rubber and seal the pole hole in the initial state (when the pole plate has not expanded), the stretchable acid-resistant rubber abuts the bottom bar of the pole. This prevents axial displacement of the stretchable acid-resistant rubber relative to the pole, which could degrade sealing performance.

[0009] Preferably, the battery further comprises a battery trough, wherein a plate assembly is disposed within the battery trough. The plate assembly comprises a positive plate and a negative plate. The positive plate and the negative plate each comprise a connecting piece, and the connecting piece abuts against the terminal busbar. The battery trough is used to house the plate assembly. The connecting pieces on the positive and negative plates serve to conduct electricity, directing current between the positive and negative plates to the terminal busbar.

[0010] Preferably, the positive electrode plates and the negative electrode plates are arranged in a staggered manner, which facilitates current conduction.

[0011] Preferably, a separator is provided between the positive electrode plate and the negative electrode plate, and is used to separate adjacent positive and negative electrode plates to prevent short circuit between the positive electrode plate and the negative electrode plate.

[0012] Preferably, the battery container is provided with an electrolyte, which is a colloidal electrolyte. The use of a colloidal electrolyte in the battery container eliminates free sulfuric acid in the battery, thereby solving the problems of plate "growth" and "acid creep" at the electrode column from the perspectives of electrode column structure and electrolyte permeability.

[0013] Preferably, a gap is provided between the bottom row of poles and the battery cover. The gap provided between the bottom row of poles and the battery cover can provide a certain amount of expansion space for the volume expansion of the pole plates and prevent the pole busbar from directly pressing against the inner surface of the battery cover.

[0014] Compared with the prior art, the beneficial effects of the present invention are: (1) it can release the expansion stress during the expansion of the plate and promote the sealing performance of the battery; (2) it solves the problems of "growth" of the plate and "acid creeping" at the pole from the two aspects of the pole structure and the permeability of the electrolyte; (3) it improves the service life and safety performance of the battery; (4) it has the advantages of simple structure, low cost, strong practicality, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an axonometric drawing of the present invention.

[0016] Figure 2 It is a cross-sectional view of the present invention.

[0017] Figure 3 for Figure 2 A magnified view of center.

[0018] Figure 4 Schematic diagram of the pole busbar of the present invention.

[0019] Figure 5 This is a top view of the battery cover of the present invention.

[0020] Figure 6 for Figure 5 Cross-sectional view in the AA direction.

[0021] Figure 7 This is an explosion diagram of the utility model.

[0022] In the figure: 1. Battery cover, 2. Terminal busbar, 3. Terminal hole, 4. Terminal, 5. Retractable acid-resistant rubber, 6. Terminal bottom row, 7. Epoxy color glue, 8. Battery slot, 9. Positive plate, 10. Negative plate, 11. Connector, 12. Separator. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1: Figures 1 to 4 The battery pole structure shown includes a battery cover 1. The battery cover 1 is an inverted U-shaped slot structure for cooperating with a battery slot 8. Two pole holes 3 are provided on the upper surface of the battery cover 1. The pole holes 3 are respectively arranged on both sides of the battery cover 1. The pole holes 3 are cylindrical and extend a certain length from the outer surface of the battery cover 1 inwardly. They are flush with the cover opening of the battery cover 1, so that the pole holes 3 have a certain axial length. The axial length of the pole holes 3 is the same as the overall thickness (height) of the battery cover 1. The pole holes 3 are used to assemble the battery pole 4 structure, thereby ensuring the effective connection area between the pole holes 3 and the pole 4.

[0025] A pole busbar 2 structure is provided inside the battery cover 1. There are also two pole busbars 2, which correspond to the positions of the two pole holes 3 respectively. The pole busbar 2 includes a pole 4 and a pole bottom row 6. The pole 4 is a cylindrical structure, and one end of the pole 4 is provided with a connection hole with an internal hollow and internal thread, and the other end of the pole 4 is fixedly connected to the pole bottom row 6. The radial dimension of the pole 4 is smaller than the radial dimension of the pole hole 3. The pole bottom row 6 and the pole 4 are fixed together to form an integral structure. Specifically, the pole bottom row 6 is a rectangular plate structure, and the length dimension of the pole bottom row 6 is larger than the radial dimension of the pole 4. A semicircular notch structure is provided on one side of the long side of the pole bottom row 6. The pole 4 is clamped in the notch position and forms an integral structure with the pole bottom row 6. The pole bottom row 6 can play a certain supporting role for the pole 4 and can fix the pole 4.

[0026] One end of the pole 4 containing a threaded hole cooperates with the pole hole 3 on the battery cover 1, while the other end is fixed to the pole bottom row 6. A retractable acid-resistant rubber 5 is also provided between the pole 4 and the pole hole 3. The retractable acid-resistant rubber 5 is a sleeve structure and is sleeved on the outside of the pole 4. Specifically, the upper end of the retractable acid-resistant rubber 5 is in the shape of a through hole, the middle part is a hollow structure, and the lower end is a support portion. The support portion is provided with a through hole with the same radial size as the pole 4, which is used to pass through and fix the pole 4. The axial dimension of the pole 4 is larger than the axial dimension of the retractable acid-resistant rubber 5, so that the pole 4 can pass through the interior of the retractable acid-resistant rubber 5 and pass out from the other end, ensuring that one end of the threaded connection hole of the pole 4 can be exposed. The bottom of the retractable acid-resistant rubber 5 abuts the pole bottom bar 6, ensuring a secure fit and sealing of the pole hole 3 in the initial state (when the pole plate has not expanded). This abutment prevents axial displacement of the retractable acid-resistant rubber 5 relative to the pole 4, which could degrade the sealing performance. If the retractable acid-resistant rubber 5 does not abut the pole bottom bar 6, the bottom of the retractable acid-resistant rubber 5 is not restrained, potentially causing axial displacement of the retractable acid-resistant rubber 5 due to external factors.

[0027] The radial dimension of the pole 4 is smaller than the radial dimension of the internal cavity of the retractable acid-resistant rubber 5, so that after the retractable acid-resistant rubber 5 is assembled with the pole hole 3, there is still a gap between the retractable acid-resistant rubber 5 and the pole. Therefore, a certain object is filled in the gap so that the pole 4 and the retractable acid-resistant rubber 5 can be fixedly connected into one. Specifically, epoxy color glue 7 can be filled between the retractable acid-resistant rubber 5 and the pole 4. The epoxy color glue 7 has the characteristics of water resistance, chemical corrosion resistance, crystal clearness, stable chemical properties, and is a better curing agent that can adapt well to the working environment of the battery.

[0028] The outside of the retractable acid-resistant rubber 5 is a conical structure with a small taper, generally only set at about 3° to 5°. Of course, it can be adjusted within a certain range according to actual needs. In addition, the outer radial size of the retractable acid-resistant rubber 5 is adapted to the radial size of the pole hole 3. When the pole 4 is assembled in the pole hole 3, the retractable acid-resistant rubber 5 and the pole hole 3 can just form a sealed fit. Specifically, the conical structure of the retractable acid-resistant rubber 5 is as follows: from the side close to the pole bottom row 6 to the side away from the pole bottom row 6, the outer radial size of the retractable acid-resistant rubber 5 gradually decreases, that is, the radial size of the retractable acid-resistant rubber 5 gradually decreases from the inside of the battery cover 1 to the outside of the battery cover 1; therefore, the fitting force between the pole hole 3 close to the inside of the battery cover 1 and the retractable acid-resistant rubber 5 is greater than the fitting force between the pole hole 3 close to the outside of the battery cover 1 and the retractable acid-resistant rubber 5; that is, the pole hole 3 position inside the battery cover 1 can form a seal with the retractable acid-resistant rubber 5 to ensure the sealing effect. As the battery ages, the volume of the corrosion layer inside the battery increases, and the volume of the electrode plates inside the battery expands, further pushing the terminal busbar 2 toward the terminal hole 3, creating an interference fit between the terminal hole 3 and the stretchable acid-resistant rubber 5. The stretchable acid-resistant rubber 5 not only relieves the pressure generated by the expansion of the electrode plates, but also promotes the interference fit between the terminal 4 and the terminal hole 3, further improving the sealing effect and thus extending the battery's service life.

[0029] A gap is also provided between the bottom electrode row 6 and the battery cover 1 to ensure that the bottom electrode row 6 has sufficient room to move. As the volume of the battery plates gradually increases, the bottom electrode row 6 is pushed toward the location of the battery cover 1. The gap between the bottom electrode row 6 and the battery cover 1 provides sufficient space to accommodate the expansion of the plate volume and prevents the busbar 2 from directly pressing against the inner surface of the battery cover 1.

[0030] It should be noted that, in this solution, the pole hole 3 adopts a cylindrical structure. In order to better match the conical retractable acid-resistant rubber 5, the pole hole 3 can also be designed as a conical structure that matches the taper of the retractable acid-resistant rubber 5. Figure 5 and Figure 6 shown.

[0031] Example 2: Figures 1 to 7 The battery pole structure shown includes a battery cover 1. The battery cover 1 is an inverted U-shaped slot structure for cooperating with a battery slot 8. Two pole holes 3 are provided on the upper surface of the battery cover 1. The pole holes 3 are respectively arranged on both sides of the battery cover 1. The pole holes 3 are cylindrical and extend a certain length from the outer surface of the battery cover 1 inwardly. They are flush with the cover opening of the battery cover 1, so that the pole holes 3 have a certain axial length. The axial length of the pole holes 3 is the same as the overall thickness (height) of the battery cover 1. The pole holes 3 are used to assemble the battery pole 4 structure, thereby ensuring the effective connection area between the pole holes 3 and the pole 4.

[0032] A pole busbar 2 structure is provided inside the battery cover 1. There are also two pole busbars 2, which correspond to the positions of the two pole holes 3 respectively. The pole busbar 2 includes a pole 4 and a pole bottom row 6. The pole 4 is a cylindrical structure, and one end of the pole 4 is provided with a connection hole with an internal hollow and internal thread, and the other end of the pole 4 is fixedly connected to the pole bottom row 6. The radial dimension of the pole 4 is smaller than the radial dimension of the pole hole 3. The pole bottom row 6 and the pole 4 are fixed together to form an integral structure. Specifically, the pole bottom row 6 is a rectangular plate structure, and the length dimension of the pole bottom row 6 is larger than the radial dimension of the pole 4. A semicircular notch structure is provided on one side of the long side of the pole bottom row 6. The pole 4 is clamped in the notch position and forms an integral structure with the pole bottom row 6. The pole bottom row 6 can play a certain supporting role for the pole 4 and can fix the pole 4.

[0033] One end of the pole 4 containing a threaded hole cooperates with the pole hole 3 on the battery cover 1, while the other end is fixed to the pole bottom row 6. A retractable acid-resistant rubber 5 is also provided between the pole 4 and the pole hole 3. The retractable acid-resistant rubber 5 is a sleeve structure and is sleeved on the outside of the pole 4. Specifically, the upper end of the retractable acid-resistant rubber 5 is in the shape of a through hole, the middle part is a hollow structure, and the lower end is a support portion. The support portion is provided with a through hole with the same radial size as the pole 4, which is used to pass through and fix the pole 4. The axial dimension of the pole 4 is larger than the axial dimension of the retractable acid-resistant rubber 5, so that the pole 4 can pass through the interior of the retractable acid-resistant rubber 5 and pass out from the other end, ensuring that one end of the threaded connection hole of the pole 4 can be exposed. The bottom of the retractable acid-resistant rubber 5 abuts the pole bottom bar 6, ensuring a secure fit and sealing of the pole hole 3 in the initial state (when the pole plate has not expanded). This abutment prevents axial displacement of the retractable acid-resistant rubber 5 relative to the pole 4, which could degrade the sealing performance. If the retractable acid-resistant rubber 5 does not abut the pole bottom bar 6, the bottom of the retractable acid-resistant rubber 5 is not restrained, potentially causing axial displacement of the retractable acid-resistant rubber 5 due to external factors.

[0034] The radial dimension of the pole 4 is smaller than the radial dimension of the internal cavity of the retractable acid-resistant rubber 5, so that after the retractable acid-resistant rubber 5 is assembled with the pole hole 3, there is still a gap between the retractable acid-resistant rubber 5 and the pole. Therefore, a certain object is filled in the gap so that the pole 4 and the retractable acid-resistant rubber 5 can be fixedly connected into one. Specifically, epoxy color glue 7 can be filled between the retractable acid-resistant rubber 5 and the pole 4. The epoxy color glue 7 has the characteristics of water resistance, chemical corrosion resistance, crystal clearness, stable chemical properties, and is a better curing agent that can adapt well to the working environment of the battery.

[0035] The outside of the retractable acid-resistant rubber 5 is a conical structure with a small taper, generally only set at about 3° to 5°. Of course, it can be adjusted within a certain range according to actual needs. In addition, the outer radial size of the retractable acid-resistant rubber 5 is adapted to the radial size of the pole hole 3. When the pole 4 is assembled in the pole hole 3, the retractable acid-resistant rubber 5 and the pole hole 3 can just form a sealed fit. Specifically, the conical structure of the retractable acid-resistant rubber 5 is as follows: from the side close to the pole bottom row 6 to the side away from the pole bottom row 6, the outer radial size of the retractable acid-resistant rubber 5 gradually decreases, that is, the radial size of the retractable acid-resistant rubber 5 gradually decreases from the inside of the battery cover 1 to the outside of the battery cover 1; therefore, the fitting force between the pole hole 3 close to the inside of the battery cover 1 and the retractable acid-resistant rubber 5 is greater than the fitting force between the pole hole 3 close to the outside of the battery cover 1 and the retractable acid-resistant rubber 5; that is, the pole hole 3 position inside the battery cover 1 can form a seal with the retractable acid-resistant rubber 5 to ensure the sealing effect. As the battery ages, the volume of the corrosion layer inside the battery increases, and the volume of the electrode plates inside the battery expands, further pushing the terminal busbar 2 toward the terminal hole 3, creating an interference fit between the terminal hole 3 and the stretchable acid-resistant rubber 5. The stretchable acid-resistant rubber 5 not only relieves the pressure generated by the expansion of the electrode plates, but also promotes the interference fit between the terminal 4 and the terminal hole 3, further improving the sealing effect and thus extending the battery's service life.

[0036] A gap is also provided between the bottom electrode row 6 and the battery cover 1 to ensure that the bottom electrode row 6 has sufficient room to move. As the volume of the battery plates gradually increases, the bottom electrode row 6 is pushed toward the location of the battery cover 1. The gap between the bottom electrode row 6 and the battery cover 1 provides sufficient space to accommodate the expansion of the plate volume and prevents the busbar 2 from directly pressing against the inner surface of the battery cover 1.

[0037] It should be noted that, in this solution, the pole hole 3 adopts a cylindrical structure. In order to better match the conical retractable acid-resistant rubber 5, the pole hole 3 can also be designed as a conical structure that matches the taper of the retractable acid-resistant rubber 5. Figure 5 and Figure 6 shown.

[0038] A plate assembly is provided inside the battery tank 8. The plate assembly includes a staggered positive plate 9 and a negative plate 10. The plate assembly can realize the charge and discharge function of the battery. A separator 12 structure is provided between the positive plate 9 and the negative plate 10. Figure 7As shown in the enlarged view in the figure, the separator 12 structure is on the right side of the negative electrode plate 10, and the next layer of the separator 12 is the positive electrode plate 9, and the next layer of the positive electrode plate 9 is the separator 12 structure, which are arranged in sequence, that is, a separator 12 structure is set between each pair of positive and negative electrode plates to prevent direct contact between the positive and negative electrode plates and cause a short circuit.

[0039] A connecting piece 11 is also provided on top of the positive plate 9 and the negative plate 10. The connecting piece 11 structure and the plate are integrally formed. The connecting pieces 11 of the positive plate 9 are all located on the same side, while the connecting pieces 11 of the negative plate 10 are located on the other side. All the connecting pieces 11 on the positive plate 9 abut against the bottom pole bar 6 at the bottom of one pole bus 2, and all the connecting pieces 11 on the negative plate 10 abut against the bottom pole bar 6 at the bottom of another pole bus 2, thus forming a positive pole and a negative pole, respectively. The pole bus 2 can converge the current on the positive plate 9 and the negative plate 10 at the pole position, forming a loop.

[0040] It should also be noted that the battery tank 8 is also filled with electrolyte, which is a colloidal electrolyte. There is no free sulfuric acid in the battery. This solves the problems of "growth" of the plate and "acid creeping" at the pole from the two aspects of the structure of the pole 4 and the permeability of the electrolyte.

Claims

1. A battery pole structure, characterized in that: It includes a battery cover and a pole busbar, wherein the battery cover is provided with a pole hole, the pole busbar is provided with a pole, and the pole is covered with a retractable acid-resistant rubber. The retractable acid-resistant rubber is tapered with a gradually decreasing radial size from the inside of the battery cover to the outside of the battery cover and cooperates with the pole hole.

2. A battery terminal structure according to claim 1, characterized in that: The pole busbar further includes a pole bottom row integrally formed with the pole, and a radial dimension of the pole bottom row is larger than a radial dimension of the pole.

3. The battery terminal structure according to claim 1, wherein: Epoxy colored glue is provided between the pole and the retractable acid-resistant rubber.

4. The battery terminal structure according to claim 2, wherein: One end of the retractable acid-resistant rubber abuts against the bottom row of the pole.

5. A battery terminal structure according to any one of claims 1 to 4, characterized in that: It also includes a battery slot, in which a plate assembly is provided. The plate assembly includes a positive plate and a negative plate. Both the positive plate and the negative plate include connecting pieces, which abut against the pole busbar.

6. A battery terminal structure according to claim 5, characterized in that: The positive electrode plates and the negative electrode plates are arranged alternately.

7. The battery terminal structure according to claim 5, wherein: A separator is provided between the positive electrode plate and the negative electrode plate.

8. The battery terminal structure according to claim 5, characterized in that: An electrolyte is provided in the battery tank, and the electrolyte is a colloidal electrolyte.

9. A battery terminal structure according to any one of claims 2 to 4, characterized in that: A gap is provided between the bottom row of poles and the battery cover.

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