Battery connection structure capable of realizing multi-stage parallel use

Abstract

The utility model discloses a battery connecting structure capable of realizing multi-stage parallel use, which is characterized in that an accommodating groove is arranged in a battery shell, a total parallel unit is arranged on one side in the battery shell, a battery pack consists of at least one battery monomer, metal parallel strips are arranged at two ends of the battery monomer, and the metal parallel strips are arranged in the accommodating groove. Each metal parallel strip is composed of a circular ring part and a patch, the end parts of the single batteries are connected with the metal parallel strips in a clamping manner, and the metal parallel strips at the end parts of the battery pack are pressed and fixed through a shell and a sealing cover; when the single battery is damaged, the single battery can be replaced by taking down the metal parallel strip at any end of the battery pack, so that the single battery is convenient to replace, the whole battery pack is prevented from being scrapped, electric welding fixation is not needed during assembly, and the assembly is simpler; and heat can be transferred between two adjacent battery monomers through the heat dissipation holes, so that local overheating of the battery is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery connection structure capable of realizing multi-stage parallel use. Background Art

[0002] Lithium-ion rechargeable batteries are currently the batteries with the highest specific energy and the longest service life. Their technology is mature, the production volume is huge, and they have entered all areas of people's lives. However, in some products, the current provided by a single battery cell is usually unable to meet the usage requirements. In order to meet different needs, people have manufactured battery packs of different capacities, which are composed of many battery cells.

[0003] In the prior art, a battery pack is generally formed by welding the electrodes of battery cells together, and the battery cells in the battery pack cannot be disassembled. When a battery cell in the battery pack is damaged and needs to be repaired, the battery cell in the battery pack must be disassembled, which means that the battery motor will be damaged and other battery cells cannot be replaced and utilized, causing the battery pack to be scrapped. When the battery cells are charging and discharging, the heat generated by each battery cell will not circulate to each other, and a problem with the heat dissipation of one battery cell may occur, resulting in excessive temperature and thus damaging the battery body. Utility Model Content

[0004] In view of the technical defects existing in the background technology, the utility model proposes a battery connection structure that can realize multi-stage parallel use, solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0005] A battery connection structure capable of realizing multi-stage parallel use, a battery shell and a battery pack, wherein a receiving groove for accommodating the battery pack is provided in the battery shell, a total parallel unit connected to the battery pack is provided on one side of the battery shell, the battery pack is composed of at least one battery cell, both ends of the battery cell are provided with metal parallel bars, the metal parallel bars are composed of a circular ring portion sleeved on the outer surface of the battery cell and a patch attached to the end position of the battery cell, the circular ring portion and the patch are integrally formed to form a plurality of battery clamping grooves, the ends of the battery cells are clamped in the battery clamping grooves, and the metal parallel bars are provided with heat dissipation holes corresponding to the connection positions of adjacent battery packs.

[0006] As an improvement of the above scheme, the metal parallel bars include positive metal parallel bars and negative metal parallel bars, the positive electrode of the battery cell is connected to the positive metal parallel bars, the negative electrode of the battery cell is connected to the negative metal parallel bars, and the positive metal parallel bars and the negative metal parallel bars are connected to the total parallel unit in the battery casing through wires.

[0007] As an improvement of the above scheme, the battery pack includes battery pack one and battery pack two, the battery pack one is composed of 4 battery cells, the battery cells are arranged in a rectangular array and clamped in the battery clamping grooves, the circular ring parts on the battery cells fit together, so that the heat dissipation holes are formed in the middle of the battery pack one.

[0008] As an improvement of the above solution, the battery pack 2 is composed of 4 battery cells, which are arranged at equal intervals along a straight line and clamped in the battery clamping grooves. The metal parallel bar is provided with heat dissipation holes at the position corresponding to the connection between the battery pack 1 and the battery pack 2.

[0009] As an improvement of the above solution, the battery housing includes an outer shell and a cover arranged on the top of the outer shell, a sealing structure is provided between the cover and the outer shell, and the sealing structure is composed of a plurality of fixing screws surrounding the outer edge of the cover.

[0010] As an improvement of the above solution, an upwardly protruding positioning ring is provided on the inner edge of the end surface where the shell and the cover are in contact, and a positioning groove is provided on the inner end surface of the cover corresponding to the positioning ring, and the positioning ring is clamped in the positioning groove.

[0011] As an improvement of the above solution, a PTC current limiting resistor is connected in series between the total parallel unit and the battery pack, and the total parallel unit is provided with a connection terminal extending toward the outside of the battery housing.

[0012] As an improvement of the above solution, a through hole is provided on a side surface of the battery housing corresponding to the position of the total parallel unit, and one end of the wiring terminal extends into the battery housing along the through hole to be connected to the total parallel unit.

[0013] The beneficial effects of the utility model are as follows: the ends of the battery cells are connected to the metal parallel bars by snap-fitting, and the metal parallel bars at the ends of the battery pack are compressed and fixed by the outer shell and the cover; when a single battery cell is damaged, the battery cell can be replaced by removing the metal parallel bars at any end of the battery pack, which facilitates the replacement of the battery cells and prevents the entire battery pack from being scrapped; no electric welding is required during assembly, and assembly is simpler; heat dissipation holes are provided between the metal parallel bars corresponding to two adjacent battery packs, so that heat can be transferred between two adjacent battery cells through the heat dissipation holes to avoid local overheating of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the battery housing of the present utility model.

[0015] Figure 2 It is a schematic diagram of the internal structure of the battery casing of the present utility model.

[0016] Figure 3 It is a schematic diagram of the shell structure of the utility model.

[0017] Figure 4 It is a schematic diagram of the sealing structure of the utility model.

[0018] Figure 5 It is a schematic diagram of the metal parallel bar structure of the utility model.

[0019] Figure 6 It is a structural schematic diagram of a battery pack of the present utility model.

[0020] Figure 7 This is a schematic diagram of the second structure of the battery pack of the present utility model.

[0021] Among them: battery shell 1, fixing screw 101, through hole 102, battery pack 2, battery cell 201, battery pack 1 202, battery pack 2 203, accommodating groove 3, total parallel unit 4, metal parallel bar 5, annular portion 501, patch 502, battery card slot 503, heat dissipation hole 504, positive metal parallel bar 6, negative metal parallel bar 7, shell 8, positioning ring 801, cover 9, positioning groove 901. DETAILED DESCRIPTION

[0022] The implementation methods of the present invention are described below in conjunction with the accompanying drawings and relevant embodiments. The implementation methods of the present invention are not limited to the following embodiments, and the present invention involves relevant necessary components in this technical field, which should be regarded as common knowledge in this technical field and can be known and mastered by technical personnel in this technical field.

[0023] like Figures 1 to 7 As shown, a battery connection structure that can be used in multi-stage parallel connection includes a battery shell 1 and a battery pack 2, wherein the battery shell 1 is provided with a receiving groove 3 for accommodating the battery pack 2, and one side of the battery shell 1 is provided with a total parallel unit 4 connected to the battery pack 2, and the battery pack 2 is composed of at least one battery cell 201, and both ends of the battery cell 201 are provided with a metal parallel bar 5, and the metal parallel bar 5 is composed of a circular ring portion 501 sleeved on the outer surface of the battery cell 201 and a patch 502 attached to the end position of the battery cell 201, and the circular ring portion 501 and the patch 502 are integrally formed to form a plurality of battery clamping grooves 503, and the end of the battery cell 201 is clamped in the battery clamping groove 503, and the metal parallel bar 5 is provided with a heat dissipation hole 504 corresponding to the connection position of the adjacent battery pack 2.

[0024] like Figure 2 , Figure 5 , Figure 6 and Figure 7As shown, in the structure of the battery pack 2, the battery pack 2 is composed of a plurality of battery cells 201 and a metal parallel bar 5. The number of the metal parallel bars 5 is two, which respectively fix the two ends of the battery cell 201. The metal parallel bar 5 is composed of a circular ring portion 501 and a patch 502. The patch 502 is integrally formed with the circular ring portion 501. The circular ring portion 501 is sleeved on the end of the battery cell 201 to form a battery clamping groove 503. The patch 502 is attached to the positive or negative electrode of the battery cell 201 after the battery cell 201 is clamped and fixed. The inner circle diameter of the circular ring portion 501 is not less than 5 cm. The metal parallel bars 5 at both ends of the battery pack 2 are connected to the total parallel unit 4 through wires.

[0025] It should be noted that the metal parallel bar 5 includes a positive metal parallel bar 6 and a negative metal parallel bar 7. The positive electrode of the battery cell 201 is connected to the positive metal parallel bar 6, and the negative electrode of the battery cell 201 is connected to the negative metal parallel bar 7. The positive metal parallel bar 6 and the negative metal parallel bar 7 are connected to the total parallel unit 4 in the battery housing 1 through wires.

[0026] It should be noted that the positive metal parallel bar 6 and the negative metal parallel bar 7 are clamped at the two ends of the battery pack 2 in the length direction, and the negative metal parallel bar 7 is arranged at the bottom of the shell 8. During assembly, after the battery cell 201 is clamped into the negative metal parallel bar 7, the positive metal parallel bar 6 is sleeved on the positive electrode of the battery cell 201, and the cover 9 is aligned and locked with the shell. The positive metal parallel bar 6 and the negative metal parallel bar 7 are synchronously pressed against the battery cell 201 as the cover 9 is locked with the shell, so that the patch 502 can fit tightly with the positive or negative electrode of the battery cell 201.

[0027] like Figure 6 and Figure 7 As shown, further, the battery pack 2 includes a battery pack 1 202 and a battery pack 2 203, the battery pack 1 202 is composed of 4 battery cells 201, the battery cells 201 are arranged in a rectangular array and clamped in the battery clamping groove 503, the metal parallel bar 5 corresponds to the arrangement position of the battery cells 201 in the battery pack 1 202, and the circular ring parts 501 on the battery cells 201 fit together, so that the heat dissipation hole 504 is formed in the middle part of the corresponding battery pack 1 202.

[0028] Furthermore, in the above scheme, the battery pack 203 is composed of 4 battery cells 201, and the battery cells 201 are arranged at equal intervals along a straight line and clamped in the battery clamping groove 503. The metal parallel bar 5 is provided with a heat dissipation hole 504 at the position corresponding to the connection between the battery pack 1 202 and the battery pack 2 203.

[0029] like Figures 1 to 4 As shown, in the battery shell 1 structure of the utility model, the battery shell 1 includes a shell 8 and a cover 9 arranged on the top of the shell 8, a sealing structure is provided between the cover 9 and the shell 8, and the sealing structure is composed of a plurality of fixing screws 101 surrounding the outer edge of the cover 9, the cover 9 and the shell 8 are both made of insulating materials, and the bottom of the accommodating groove 3 is provided with a groove for clamping the negative metal parallel bar 7. During assembly, the negative metal parallel bar 7 is fixed by manually placing it in the groove, and the negative electrode of the battery cell 201 is clamped in the annular portion 501 on the negative metal parallel bar 7. After the negative electrode of the battery cell 201 is installed, the positive metal parallel bar 6 is aligned with the positive electrode of the battery cell 201 and pressed by the cover 9.

[0030] Furthermore, in the above scheme, an upwardly protruding positioning ring 801 is provided on the inner edge of the end surface where the outer shell 8 and the cover 9 are in contact, and a positioning groove 901 is provided on the inner end surface of the cover 9 corresponding to the position of the positioning ring 801, and the positioning ring 801 is snapped into the positioning groove 901. The positioning ring 801 and the positioning groove 901 increase the sealing performance between the outer shell 8 and the cover 9, and have a certain waterproof effect.

[0031] Furthermore, in the above solution, a PTC current limiting resistor is connected in series between the total parallel unit 4 and the battery pack 2 , and the total parallel unit 4 is provided with a connection terminal extending toward the outside of the battery housing 1 .

[0032] Furthermore, in the above solution, a through hole 102 is provided on a side surface of the battery housing 1 corresponding to the position of the total parallel unit 4 , and one end of the terminal extends into the battery housing 1 along the through hole 102 to be connected to the total parallel unit 4 .

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A battery connection structure capable of realizing multi-stage parallel use, characterized in that: A battery housing (1) and a battery pack (2), wherein a receiving groove (3) for receiving the battery pack (2) is provided in the battery housing (1), a total parallel unit (4) connected to the battery pack (2) is provided on one side of the battery housing (1), the battery pack (2) is composed of at least one battery cell (201), both ends of the battery cell (201) are provided with metal parallel bars (5), the metal parallel bars (5) are composed of a circular ring portion (501) sleeved on the outer surface of the battery cell (201) and a patch (502) attached to the end of the battery cell (201), the circular ring portion (501) and the patch (502) are integrally formed to form a plurality of battery clamping grooves (503), the ends of the battery cells (201) are clamped in the battery clamping grooves (503), and the metal parallel bars (5) are provided with heat dissipation holes (504) corresponding to the connection positions of the adjacent battery packs (2).

2. The battery connection structure capable of realizing multi-stage parallel use according to claim 1, characterized in that: The metal parallel bar (5) comprises a positive metal parallel bar (6) and a negative metal parallel bar (7); the positive electrode of the battery cell (201) is connected to the positive metal parallel bar (6); the negative electrode of the battery cell (201) is connected to the negative metal parallel bar (7); the positive metal parallel bar (6) and the negative metal parallel bar (7) are connected to a total parallel unit (4) in the battery housing (1) via a wire.

3. The battery connection structure capable of realizing multi-stage parallel use according to claim 1, characterized in that: The battery pack (2) comprises a battery pack 1 (202) and a battery pack 2 (203); the battery pack 1 (202) is composed of four battery cells (201); the battery cells (201) are arranged in a rectangular array and snap-fitted into the battery snap-fitting slots (503); the annular portions (501) on the battery cells (201) fit together, thereby forming the heat dissipation hole (504) in the middle of the corresponding battery pack 1 (202).

4. The battery connection structure capable of realizing multi-stage parallel use according to claim 3, characterized in that: The second battery pack (203) is composed of four battery cells (201), the battery cells (201) being arranged at equal intervals along a straight line and snapped into the battery snap-in slots (503), and the metal parallel bar (5) is provided with heat dissipation holes (504) at positions corresponding to the connection between the first battery pack (202) and the second battery pack (203).

5. The battery connection structure capable of realizing multi-stage parallel use according to claim 1, characterized in that: The battery housing (1) comprises an outer shell (8) and a cover (9) arranged at the top of the outer shell (8), a sealing structure is provided between the cover (9) and the outer shell (8), and the sealing structure is composed of a plurality of fixing screws (101) surrounding the outer edge of the cover (9).

6. The battery connection structure capable of realizing multi-stage parallel use according to claim 5, characterized in that: An upwardly protruding positioning ring (801) is provided on the inner edge of the end surface where the shell (8) and the cover (9) are in contact, and a positioning groove (901) is provided on the inner end surface of the cover (9) at a position corresponding to the positioning ring (801), and the positioning ring (801) is snap-fitted into the positioning groove (901).

7. The battery connection structure capable of realizing multi-stage parallel use according to claim 1, characterized in that: A PTC current limiting resistor is connected in series between the total parallel unit (4) and the battery pack (2), and the total parallel unit (4) is provided with a connection terminal extending toward the outside of the battery housing (1).

8. The battery connection structure capable of realizing multi-stage parallel use according to claim 7, characterized in that: A through hole (102) is provided on a side surface of the battery housing (1) corresponding to the position of the total parallel unit (4), and one end of the connection terminal extends along the through hole (102) into the battery housing (1) to be connected to the total parallel unit (4).

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