Lead storage battery

Abstract

The utility model discloses a lead storage battery which comprises a storage battery groove and pole groups arranged in the storage battery groove, and a positive busbar or a negative busbar positioned on the upper side of each pole group is arranged on one side of the storage battery groove in the length direction; one side, close to the positive busbar or the negative busbar located on the upper side, of an upper opening of the storage battery groove is higher than the other side, correspondingly, one side of the upper cover is higher than the other side, the glue groove is located on the higher side of the upper cover, and the acid injection hole is located on the lower side of the upper cover. According to the lead storage battery provided by the utility model, on one hand, the utilization rate of active substances of the polar plates can be improved, and on the other hand, the risk of corroding the terminals and the lug plates by acid mist can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of secondary batteries, and in particular relates to a lead-acid battery. Background Art

[0002] The structure of a lead-acid battery generally includes a battery container, which includes a container body and a container cover that cover each other. The inner cavity of the container body is divided into multiple cells by a partition plate, and each cell is equipped with a pole group. The pole group includes alternating positive and negative plates. The top surface of the positive plate is provided with a positive tab, and the top surface of the negative plate is provided with a negative tab. Generally, the positive tabs and negative tabs are set on the top surface and are staggered. In this way, all positive tabs in a pole group are connected in series using a positive busbar, and all negative tabs are connected in series using a negative busbar. Then, adjacent pole groups are connected in series end to end. After the series connection, the positive and negative terminal posts are led out from the busbars at the beginning and end for connection terminals.

[0003] The cell cover is equipped with rubber grooves for the positive and negative terminals, typically located at the edges of the top surface. Each cell in the cell cover also has an acid injection hole, fitted with a safety valve. The acid injection hole is located in a sunken cover plate slot, which is then covered by a cover plate. During use, lead-acid batteries generate some gas, increasing internal pressure. The gas is then discharged through the safety valve and then out the vent hole where the cover plate and cover plate slot meet.

[0004] For example, the utility model with authorization announcement number CN219800982U discloses a button-type lead-acid battery cover, including a middle cover and a cover plate. The top surface of the middle cover has a cover plate groove for accommodating the cover plate, an acid injection hole column is provided in the cover plate groove, and an acid injection hole is provided on the acid injection hole column. The bottom surface of the cover plate groove is convexly provided with a plurality of first buckle seats, and correspondingly, the bottom surface of the cover plate is correspondingly provided with a plurality of second buckle seats, and each pair of first buckle seats and second buckle seats is provided with a first buckle hole and a first buckle point that cooperate with each other.

[0005] In existing technology, the tabs are all on the top side, resulting in uneven current distribution during discharge in lead-acid batteries. Due to the inherent resistance between the electrodes, current tends to flow along the shorter path above the plate. Consequently, the upper portion of the positive plate, closest to the tabs, is more prone to discharge reactions and has a higher utilization rate, while the lower portion suffers from lower utilization. Furthermore, the cover plate edge and vent holes are close to the terminals, creating acid mist that can easily corrode the terminals and lugs. Utility Model Content

[0006] The utility model aims to solve the problems existing in the prior art and provides a lead-acid battery, which can improve the utilization rate of the active material of the plate and reduce the risk of acid mist corrosion of the terminal and the wiring piece.

[0007] A lead-acid battery comprises a battery tank and a pole group arranged in the battery tank, the pole group comprising alternately stacked positive plates and negative plates, a positive pole ear provided on the top surface of the positive plate, a negative pole ear provided on the top surface of the negative plate, the positive pole ears of the same pole group are connected in series by a positive pole bus, and the negative pole ears of the same pole group are connected in series by a negative pole bus, the positive pole ears and the negative pole ears in the same pole group are respectively located on the upper and lower sides, the upper and lower sides of the battery tank are both opened, wherein the upper opening of the battery tank is provided with an upper cover, and the lower opening is provided with a lower cover, the upper cover has a glue groove for accommodating positive and negative terminals, and an acid injection hole, the positive pole bus or the negative pole bus located on the upper side of each pole group is arranged on one side in the length direction of the battery tank, and the upper opening of the battery tank is closer to the positive pole bus or the negative pole bus located on the upper side and is higher than the other side, correspondingly, one side of the upper cover is higher than the other side, the glue groove is located on the higher side of the upper cover, and the acid injection hole is located on the lower side of the upper cover.

[0008] Specifically, a cover plate groove is provided on the lower side of the upper cover, the acid injection hole is located at the bottom of the cover plate groove, and a cover plate is provided in the cover plate groove.

[0009] Specifically, it also includes a control panel. The top surface of the cover is also provided with a control panel mounting position. The lower side of the upper cover is surrounded by the control panel mounting position and is provided with a support column for fixing the control panel at the control panel mounting position. The control panel can expand a variety of monitoring devices to display the working status of the battery, so that users can use the battery more scientifically and reasonably.

[0010] Specifically, a top cover is provided on the lower side of the upper cover, and the top surface of the top cover is flush with the top surface of the higher side of the upper cover, so that the upper cover as a whole is still an overall plane, which is convenient for users to install and clamp, and can also be used to protect the control panel.

[0011] Specifically, the top cover is made of transparent material, which facilitates obtaining data information on the control panel.

[0012] Specifically, a detection hole for the detection line to pass through is provided on the connecting side surface between the higher side and the lower side of the upper cover. One end of the detection line located outside the lead-acid battery is connected to the control panel, and the other end located inside the lead-acid battery is connected to the sensor for detection. After the detection line is installed, the detection hole is filled and sealed with sealant to make full use of the empty space inside the battery. The sealant is used to fill the hole while obtaining the working status of the battery to solve the sealing problem.

[0013] Specifically, the sensors include a temperature sensor for obtaining the temperature in the battery tank and a voltage sensor for obtaining the single voltage of a single cell.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By arranging the tabs of the positive and negative plates in the electrode group in an alternating manner, the utilization rate of the active materials in the plates is improved. At the same time, a stepped battery cover with a concave side without a busbar is used to reduce the corrosion of the battery interior by acid mist, thereby further improving the performance and life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a lead-acid battery provided in this embodiment;

[0017] Figure 2 A schematic diagram of the structure of the pole group provided in this embodiment;

[0018] Figure 3 A schematic diagram of the top of the battery compartment provided in this embodiment;

[0019] Figure 4 A schematic diagram of the bottom of the battery compartment provided in this embodiment;

[0020] Figure 5 A schematic diagram of the upper cover provided in this embodiment;

[0021] Figure 6 A schematic diagram of the lower cover provided in this embodiment;

[0022] In the figure, 1. Battery tray; 2. Cover; 3. Electrode group; 3-1. Positive plate; 3-2. Positive tab; 3-3. Negative plate; 3-4. Negative tab; 4. Busbar; 5. Top cover; 6. Copper terminal; 7. Upper cover; 7-1. Glue tank; 7-2. Acid injection hole; 8. Control panel; 9. Lower cover. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, a battery includes a battery container 1 and a pole group 3 arranged in the battery container 1.

[0025] like Figure 2As shown, it is a schematic diagram of the electrode group 3 provided in this embodiment, which includes alternately stacked positive electrode plates 3-1 and negative electrode plates 3-3. The top surface of the positive electrode plate 3-1 is provided with a positive electrode ear 3-2, and the top surface of the negative electrode plate 3-3 is provided with a negative electrode ear 3-4. The positive electrode ears 3-2 of the same electrode group are connected in series by the positive electrode bus 4, and the negative electrode ears 3-4 of the same electrode group are connected in series by the negative electrode bus 4. The positive electrode ears 3-2 and the negative electrode ears 3-4 in the same electrode group are located on the upper and lower sides respectively.

[0026] More specifically, by Figure 2 The arrangement shown can enlarge the internal current flow path from the negative ear to the positive ear, making the current density distribution of the entire plate more uniform, thereby improving the utilization rate of the active material of the plate, and solving the problem that in traditional electrode groups, due to the certain resistance between the electrodes, only the positive electrode part is prone to discharge reaction but the overall reaction efficiency is low.

[0027] like Figure 3 and Figure 4 As shown, the upper and lower sides of the battery tank 1 are both opened, wherein the upper opening of the battery tank 1 is provided with an upper cover 7, and the lower opening is provided with a lower cover 9, and the pole group 3 is connected in series into a whole through the bus 4 in the battery tank 1, and the two poles are led out on the top, and the positive and negative bridge bus are at the bottom, and the whole is staggered. The bus 4 is a direct-connected dipping structure. During the installation process, the bus is immersed in the epoxy resin glue groove of the upper cover 7 and the lower cover 9 as a whole.

[0028] The upper positive bus or negative bus in each electrode group is arranged on one side of the length direction of the battery container 1, and the upper opening of the battery container 1 is higher on the side close to the upper positive bus or negative bus than on the other side.

[0029] like Figure 5 As shown, one side of the upper cover 7 is higher than the other side and a cover plate groove is provided on the lower side. The glue groove 7-1 is located on the higher side of the upper cover 7. A copper terminal 6 is provided in the glue groove 7-1, and the acid injection hole 7-2 is located at the bottom of the cover plate groove. In addition, a cover plate 2 is provided at the cover plate groove.

[0030] The top surface of the cover plate 2 is also provided with a control panel mounting position, and the lower side surrounding the control panel mounting position is provided with a support column for fixing the control panel 8 at the control panel mounting position.

[0031] A top cover 5 is also provided on the lower side of the upper cover 7. The top surface of the top cover 5 is flush with the top surface of the higher side of the upper cover 7. The top cover 5 in this embodiment is made of transparent material, which is convenient for observing the data displayed on the control panel 8. At the same time, it is installed on the upper cover 7 in the form of a hinge, so that the top of the battery remains an integral plane, which is conducive to the user's installation.

[0032] In addition, a detection hole for the detection line to pass through is provided on the connecting side between the higher side and the lower side of the upper cover 7. The detection line is connected to the control panel 8 at one end outside the lead-acid battery, and is connected to the detection sensor at the other end inside the lead-acid battery. In this embodiment, a temperature sensor and multiple voltage sensors are selected. The temperature sensor is used to obtain the operating temperature in the battery slot 1 to ensure safe use, and the multiple voltage sensors are used to obtain the voltage information of a single cell battery to facilitate fault detection and battery life prediction. After the detection line is installed, the detection hole is filled and sealed with sealant. The detection hole in this embodiment is a countersunk hole.

[0033] like Figure 6 As shown, a glue groove structure is provided on the back of the lower cover 9, and epoxy resin glue is filled inside, which effectively prevents the internal electrolyte from corroding the bus. At the same time, a convection gap is also provided on the side of the lower cover 9, and an effective through-structure is also formed on the other side of the glue groove, which is beneficial to the heat dissipation of the bottom of the battery and provides a favorable space for the installation of the battery pack heat dissipation device.

Claims

1. A lead-acid battery, comprising a battery tank and a pole group arranged in the battery tank, wherein the pole group comprises alternately stacked positive plates and negative plates, a positive pole ear is provided on the top surface of the positive plate, a negative pole ear is provided on the top surface of the negative plate, each positive pole ear of the same pole group is connected in series by a positive pole bus, each negative pole ear of the same pole group is connected in series by a negative pole bus, the positive pole ear and the negative pole ear in the same pole group are respectively located at the upper and lower sides, the upper and lower sides of the battery tank are both opened, wherein the upper side opening of the battery tank is provided with an upper cover, and the lower side opening is provided with a lower cover, the upper cover has a glue groove for accommodating positive and negative terminals, and an acid injection hole, characterized in that The positive bus or negative bus located on the upper side of each pole group is arranged on one side of the length direction of the battery slot, and the upper opening of the battery slot is closer to the positive bus or negative bus located on the upper side and is higher than the other side. Correspondingly, one side of the upper cover is higher than the other side, the glue groove is located on the higher side of the upper cover, and the acid injection hole is located on the lower side of the upper cover.

2. The lead-acid battery according to claim 1, characterized in that: A cover sheet groove is arranged on the lower side of the upper cover, the acid injection hole is located at the bottom of the cover sheet groove, and a cover sheet is matched at the cover sheet groove.

3. The lead-acid battery according to claim 2, characterized in that: It also includes a control panel. The top surface of the cover sheet is also provided with a control panel installation position. The lower side of the upper cover is surrounded by the control panel installation position and is provided with a support column for fixing the control panel at the control panel installation position.

4. The lead-acid battery according to claim 3, characterized in that: A top cover is also provided on the lower side of the upper cover, and the top surface of the top cover is flush with the top surface of the higher side of the upper cover.

5. The lead-acid battery according to claim 4, characterized in that: The top cover is made of transparent material.

6. The lead-acid battery according to claim 3, characterized in that: A detection hole for a detection line to pass through is also provided on the connecting side surface between the higher side and the lower side of the upper cover. One end of the detection line located outside the lead-acid battery is connected to the control panel, and the other end located inside the lead-acid battery is connected to a sensor for detection. After the detection line is installed, the detection hole is filled and sealed with sealant.

7. The lead-acid battery according to claim 6, characterized in that: The sensor comprises a temperature sensor for obtaining the temperature in the battery tank and a voltage sensor for obtaining the single voltage of a single cell.

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