Anti-extrusion connecting structure of battery pack

Abstract

According to the anti-extrusion connecting structure of the battery pack, a plurality of connecting structures are arranged at the top of the battery pack in a staggered manner, and one end of the first connecting structure is connected with the positive electrode of the first row of battery cells of the battery pack except the negative electrode of the first row of battery cells and the positive electrode of the last row of battery cells; one end of the second connecting structure is connected with the positive electrode of the second row of battery cells, the other end of the second connecting structure is connected with the negative electrode of the third row of battery cells, and so on, one end of the nth connecting structure is connected with the positive electrode of the nth row of battery cells, and the other end of the nth connecting structure is connected with the negative electrode of the (n + 1) th row of battery cells; an upward protruding structure is arranged in the middle of the connecting structure, so that when the battery pack is extruded, displacement generated by extrusion is buffered, and connecting points of the connecting structure and the battery cells are not directly stressed to be damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, and more specifically to an anti-extrusion connection structure of a battery pack. Background Art

[0002] Lithium-ion batteries have the advantages of high specific energy, many cycles and long storage time. They are widely used not only in portable electronic devices such as mobile phones, digital cameras and laptops, but also in large and medium-sized electric equipment such as electric vehicles, electric bicycles and power tools.

[0003] The utility model patent with the announcement number CN 210467929 U discloses a lithium-ion power battery module, including a battery module and a module fixing frame arranged around the battery pack. The battery module includes single cells arranged in parallel rows, and energy-absorbing and extrusion-resistant lining plates are arranged between the single cells and between the battery module and the module fixing frame; the cross section of the lining plate is a honeycomb structure. When the battery module is subjected to external collision / extrusion, when the impact force / extrusion force is below the safety value, the battery module has a certain ability to resist extrusion deformation to ensure the normal use of the battery; when the impact force / extrusion force exceeds the safety value, the internal lining plate is compressed and deformed to relieve the external force, and the deformation can absorb part of the external energy, ensuring the safety of the battery in the protection failure mode.

[0004] However, there is no structure between the battery cells in this design to resist extrusion, only a module fixing frame outside the battery pack. Therefore, how to set an extrusion structure between the battery cells in the battery pack is a technical problem that technicians in this field currently need to solve. Utility Model Content

[0005] In order to solve the above problems, the utility model proposes an anti-extrusion connection structure of a battery pack, by providing multiple connection structures 2 on the top of the battery pack, and the multiple connection structures 2 are staggered. Except for the negative electrode of the first row of battery cells 1 and the positive electrode of the last row of battery cells 1, one end of the first connection structure 2 is connected to the positive electrode of the first row of battery cells 1 of the battery pack, and the other end is connected to the negative electrode of the second row of battery cells 1. One end of the second connection structure 2 is connected to the positive electrode of the second row of battery cells 1, and the other end is connected to the negative electrode of the third row of battery cells 1. And so on, one end of the nth connection structure 2 is connected to the positive electrode of the nth row of battery cells 1, and the other end is connected to the negative electrode of the n+1th row of battery cells 1; an upward protrusion structure 21 is provided in the middle of the connection structure 2, so that when the battery pack is squeezed, the displacement caused by the squeezing is buffered, so that the connection point between the connection structure 2 and the battery cell 1 is not directly subjected to force to damage the connection point.

[0006] An anti-extrusion connection structure of a battery pack, the battery pack is composed of a plurality of battery cells 1 arranged in a row, the positive and negative electrodes of adjacent battery cells 1 are arranged alternately, a plurality of connection structures 2 are arranged on the top of the battery pack, the plurality of connection structures 2 are arranged alternately, except for the negative electrode of the first row of battery cells 1 and the positive electrode of the last row of battery cells 1, one end of the first connection structure 2 is connected to the positive electrode of the first row of battery cells 1 of the battery pack, and the other end is connected to the negative electrode of the second row of battery cells 1, one end of the second connection structure 2 is connected to the positive electrode of the second row of battery cells 1, and the other end is connected to the negative electrode of the third row of battery cells 1, and so on, one end of the nth connection structure 2 is connected to the positive electrode of the nth row of battery cells 1, and the other end is connected to the negative electrode of the n+1th row of battery cells 1; an upward protrusion structure 21 is provided in the middle of the connection structure 2, so that when the battery pack is squeezed, the displacement caused by the squeezing is buffered, so that the connection point between the connection structure 2 and the battery cell 1 is not directly subjected to force to damage the connection point.

[0007] In some embodiments, the protrusion structure 21 has a protrusion height of 2 to 4 mm.

[0008] In some embodiments, the connection structure 2 is made of elastic conductive material.

[0009] Furthermore, the elastic conductive material is an aluminum sheet.

[0010] Furthermore, the connection structure 2 is symmetrically provided with positioning holes 22, and the positioning holes 22 are used to determine the connection points between the connection structure 2 and the battery cell 1. The positioning holes 22 are also used to hot-melt the connection structure 2 and the battery cell 1 through positioning columns, so that the connection structure 2 is not easy to slide.

[0011] Furthermore, when the number of the connection structures 2 is an odd number, the battery cells 1 are arranged in an even number of rows, and when the number of the connection structures 2 is an even number, the battery cells 1 are arranged in an odd number of rows.

[0012] Furthermore, the two ends of the connection structure 2 connecting the positive electrode and the negative electrode are symmetrically arranged, with the protruding structure 21 as the center, and the connection structure 2 is parallel and asymmetrically arranged near the edge and near the inside for fool-proofing.

[0013] Furthermore, the negative electrode of the first row of battery cells 1 and the positive electrode of the last row of battery cells 1 are respectively connected to the positive and negative electrode output pole seats 3 for transmitting the data of the battery cells 1 to an external device.

[0014] Furthermore, the positive and negative output pole seats 3 are connected to the two ends of the battery pack through a connecting plate 4, one end of the connecting plate 4 is connected to the positive and negative output pole seats 3, and the other end is connected to the electrode end of the battery cell 1. The positive and negative output pole seats 3 are used to transmit the data of the battery cell 1 to an external device.

[0015] Furthermore, one end of the positive and negative output pole seats 3 away from the connecting plate 4 is connected to the anti-extrusion structure 5, and the anti-extrusion structure 5 is symmetrically arranged at both ends of the battery pack. Reinforcing ribs 55 are arranged inside the anti-extrusion structure 5, so that the battery pack can play a supporting role when it is squeezed.

[0016] Furthermore, an insulating structure 6 is provided above the multiple battery cells 1 and between the connecting structure 2. The insulating structure 6 is integrally formed, and the length and width of the insulating structure 6 are the same as the length and width of the battery pack. A battery cell avoidance groove 61 is opened on the insulating structure 6, and the battery cell avoidance groove 61 is located at the connection between the connecting structure 2 and the battery cell 1.

[0017] Furthermore, a plurality of collectors 7 are provided on the insulating structure 6. The collectors 7 include voltage collectors and temperature collectors. The collectors 7 correspond to the battery cells 1 one by one. The collectors 7 at both ends of the battery pack are used to collect the temperature of the battery cells 1, and the remaining collectors 7 collect voltage and temperature at intervals.

[0018] The beneficial effects of the utility model include: an anti-extrusion connection structure of a battery pack, wherein the battery pack is composed of a plurality of battery cells 1 arranged in a row, and the positive and negative electrodes of adjacent battery cells 1 are arranged alternately; a plurality of connection structures 2 are arranged on the top of the battery pack, and the plurality of connection structures 2 are arranged alternately; except for the negative electrode of the first row of battery cells 1 and the positive electrode of the last row of battery cells 1, one end of the first connection structure 2 is connected to the positive electrode of the first row of battery cells 1 of the battery pack, and the other end is connected to the negative electrode of the second row of battery cells 1; one end of the second connection structure 2 is connected to the positive electrode of the second row of battery cells 1, and the other end is connected to the negative electrode of the third row of battery cells 1; and so on; one end of the nth connection structure 2 is connected to the positive electrode of the nth row of battery cells 1, and the other end is connected to the negative electrode of the n+1th row of battery cells 1; an upward protrusion structure 21 is provided in the middle of the connection structure 2, so that when the battery pack is squeezed, the displacement caused by the squeezing is buffered, so that the connection point between the connection structure 2 and the battery cell 1 is not directly subjected to force to damage the connection point. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an overall structural diagram of the anti-extrusion connection structure of the battery pack of the present invention.

[0020] Figure 2 This is a single body structure diagram of the anti-extrusion connection structure of the battery pack of the present invention.

[0021] Figure 3 This is a structural diagram of the insulation structure of the anti-extrusion connection structure of the battery pack of the present invention.

[0022] Main component symbols

[0023] Battery cell 1, connection structure 2, protruding structure 21, positioning hole 22, positive and negative output pole seats 3, connecting piece 4, anti-extrusion structure 5, reinforcing rib 55, insulating structure 6, battery cell avoidance groove 61, collector 7.

[0024] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0025] like Figure 1 As shown, it is the overall structure diagram of the anti-extrusion connection structure of the battery pack of the utility model; Figure 2 As shown, it is a single body structure diagram of the anti-extrusion connection structure of the battery pack of the utility model; Figure 3 The figure shows the insulation structure diagram of the anti-extrusion connection structure of the battery pack of the present invention.

[0026] Embodiment 1:

[0027] An anti-extrusion connection structure of a battery pack, the battery pack is composed of a plurality of battery cells 1 arranged in a row, the positive and negative electrodes of adjacent battery cells 1 are arranged alternately, a plurality of connection structures 2 are arranged on the top of the battery pack, the plurality of connection structures 2 are arranged alternately, except for the negative electrode of the first row of battery cells 1 and the positive electrode of the last row of battery cells 1, one end of the first connection structure 2 is connected to the positive electrode of the first row of battery cells 1 of the battery pack, and the other end is connected to the negative electrode of the second row of battery cells 1, one end of the second connection structure 2 is connected to the positive electrode of the second row of battery cells 1, and the other end is connected to the negative electrode of the third row of battery cells 1, and so on, one end of the nth connection structure 2 is connected to the positive electrode of the nth row of battery cells 1, and the other end is connected to the negative electrode of the n+1th row of battery cells 1; an upward protrusion structure 21 is provided in the middle of the connection structure 2, so that when the battery pack is squeezed, the displacement caused by the squeezing is buffered, so that the connection point between the connection structure 2 and the battery cell 1 is not directly subjected to force to damage the connection point.

[0028] The protrusion height of the protrusion structure 21 is 2-4 mm.

[0029] The connection structure 2 is made of an elastic conductive material, and the elastic conductive material is an aluminum sheet.

[0030] The connection structure 2 is also symmetrically provided with positioning holes 22, and the positioning holes 22 are used to determine the connection points between the connection structure 2 and the battery cell 1. The positioning holes 22 are also used to hot-melt the connection structure 2 and the battery cell 1 through positioning columns, so that the connection structure 2 is not easy to slide.

[0031] When the number of the connection structures 2 is an odd number, the battery cells 1 are arranged in an even number of rows; when the number of the connection structures 2 is an even number, the battery cells 1 are arranged in an odd number of rows.

[0032] The two ends of the connection structure 2 connecting the positive electrode and the negative electrode are symmetrically arranged, with the protruding structure 21 as the center, and the side of the connection structure 2 close to the edge and the side close to the inside are parallel and asymmetrically arranged for foolproofing.

[0033] The negative electrodes of the first row of battery cells 1 and the positive electrodes of the last row of battery cells 1 are connected to the positive and negative electrode output pole seats 3 respectively, which are used to transmit the data of the battery cells 1 to external devices.

[0034] The positive and negative output pole seats 3 are connected to the two ends of the battery pack through a connecting piece 4, one end of the connecting piece 4 is connected to the positive and negative output pole seats 3, and the other end is connected to the electrode end of the battery cell 1. The positive and negative output pole seats 3 are used to transmit the data of the battery cell 1 to an external device.

[0035] The positive and negative output pole seats 3 are connected to the anti-extrusion structure 5 at one end away from the connecting plate 4. The anti-extrusion structure 5 is symmetrically arranged at both ends of the battery pack. Reinforcing ribs 55 are arranged inside the anti-extrusion structure 5 to provide support when the battery pack is squeezed.

[0036] An insulating structure 6 is provided above the multiple battery cells 1 and between the connecting structure 2. The insulating structure 6 is integrally formed, and the length and width of the insulating structure 6 are the same as the length and width of the battery pack. A battery cell avoidance groove 61 is opened on the insulating structure 6, and the battery cell avoidance groove 61 is located at the connection between the connecting structure 2 and the battery cell 1.

[0037] The insulating structure 6 is also provided with a plurality of collectors 7, which include voltage collectors and temperature collectors. The collectors 7 correspond to the battery cells 1 one by one. The collectors 7 at both ends of the battery pack are used to collect the temperature of the battery cells 1, and the remaining collectors 7 collect voltage and temperature at intervals.

[0038] The beneficial effects of the utility model include: an anti-extrusion connection structure of a battery pack, wherein the battery pack is composed of a plurality of battery cells 1 arranged in a row, and the positive and negative electrodes of adjacent battery cells 1 are arranged alternately; a plurality of connection structures 2 are arranged on the top of the battery pack, and the plurality of connection structures 2 are arranged alternately; except for the negative electrode of the first row of battery cells 1 and the positive electrode of the last row of battery cells 1, one end of the first connection structure 2 is connected to the positive electrode of the first row of battery cells 1 of the battery pack, and the other end is connected to the negative electrode of the second row of battery cells 1; one end of the second connection structure 2 is connected to the positive electrode of the second row of battery cells 1, and the other end is connected to the negative electrode of the third row of battery cells 1; and so on; one end of the nth connection structure 2 is connected to the positive electrode of the nth row of battery cells 1, and the other end is connected to the negative electrode of the n+1th row of battery cells 1; an upward protrusion structure 21 is provided in the middle of the connection structure 2, so that when the battery pack is squeezed, the displacement caused by the squeezing is buffered, so that the connection point between the connection structure 2 and the battery cell 1 is not directly subjected to force to damage the connection point.

[0039] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An anti-extrusion connection structure of a battery pack, the battery pack comprising a plurality of battery cells (1) arranged in a row, the positive and negative electrodes of adjacent battery cells (1) being arranged alternately, characterized in that: A plurality of connection structures (2) are arranged on the top of the battery pack. The plurality of connection structures (2) are arranged in a staggered manner. Except for the negative electrode of the first row of battery cells (1) and the positive electrode of the last row of battery cells (1), one end of the first connection structure (2) is connected to the positive electrode of the first row of battery cells (1) of the battery pack, and the other end is connected to the negative electrode of the second row of battery cells (1). One end of the second connection structure (2) is connected to the positive electrode of the second row of battery cells (1), and the other end is connected to the negative electrode of the third row of battery cells (1). Similarly, one end of the nth connection structure (2) is connected to the positive electrode of the nth row of battery cells (1), and the other end is connected to the negative electrode of the n+1th row of battery cells (1). An upward protruding structure (21) is arranged in the middle of the connection structure (2), so that when the battery pack is squeezed, the displacement caused by the squeezing is buffered, so that the connection point between the connection structure (2) and the battery cell (1) is not directly subjected to force to damage the connection point.

2. The anti-extrusion connection structure of the battery pack according to claim 1, characterized in that: The protrusion height of the protrusion structure (21) is 2 to 4 mm.

3. The anti-extrusion connection structure of the battery pack according to claim 1, characterized in that: The connection structure (2) is also symmetrically provided with positioning holes (22), the positioning holes (22) are used to determine the connection points between the connection structure (2) and the battery cell (1), and the positioning holes (22) are also used to connect the connection structure (2) and the battery cell (1) via positioning columns.

4. The anti-extrusion connection structure of the battery pack according to claim 1, characterized in that: When the connection structures (2) are an odd number, the battery cells (1) are in an even number of rows; when the connection structures (2) are an even number, the battery cells (1) are in an odd number of rows.

5. The anti-extrusion connection structure of the battery pack according to claim 1, characterized in that: The two ends of the connection structure (2) connecting the positive electrode and the negative electrode are symmetrically arranged, with the protruding structure (21) as the center, and the side of the connection structure (2) close to the edge and the side close to the inside are parallel and asymmetrically arranged.

6. The anti-extrusion connection structure of the battery pack according to claim 1, characterized in that: The negative electrodes of the first row of battery cells (1) and the positive electrodes of the last row of battery cells (1) are connected to the positive and negative electrode output pole seats (3) respectively.

7. The anti-extrusion connection structure of the battery pack according to claim 6, characterized in that: The positive and negative electrode output pole seats (3) are connected to the two ends of the battery pack via a connecting piece (4); one end of the connecting piece (4) is connected to the positive and negative electrode output pole seats (3), and the other end is connected to the electrode end of the battery cell (1).

8. The anti-extrusion connection structure of the battery pack according to claim 7, characterized in that: One end of the positive and negative output pole seats (3) away from the connecting piece (4) is connected to an anti-extrusion structure (5), the anti-extrusion structure (5) is symmetrically arranged at both ends of the battery pack, and a reinforcing rib (55) is arranged inside the anti-extrusion structure (5).

9. The anti-extrusion connection structure of the battery pack according to claim 1, characterized in that: An insulating structure (6) is provided above the plurality of battery cells (1) and between the connection structure (2); the insulating structure (6) is integrally formed, and the length and width of the insulating structure (6) are the same as the length and width of the battery pack; a battery cell avoidance groove (61) is provided on the insulating structure (6); the battery cell avoidance groove (61) is located at the connection between the connection structure (2) and the battery cell (1).

10. The anti-extrusion connection structure of the battery pack according to claim 9, characterized in that: The insulating structure (6) is also provided with a plurality of collectors (7), the collectors (7) including voltage collectors and temperature collectors, the collectors (7) corresponding to the battery cells (1) one by one, the collectors (7) at both ends of the battery pack are used to collect the temperature of the battery cells (1), and the remaining collectors (7) collect voltage and temperature in an interval distribution.

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