A battery pack

Abstract

This utility model relates to the field of battery technology and discloses a battery pack, including a temperature sensor, a data acquisition circuit board, an isolation plate, and a fixing component. The temperature sensor is used to acquire temperature data of individual battery cells; the data acquisition circuit board is used to acquire the temperature data acquired by the temperature sensor; the isolation plate is disposed between the data acquisition circuit board and the individual battery cells; the fixing component includes a fixing bracket and a positioning pressure plate; the fixing bracket has a first slot in the middle, and the isolation plate has a second slot. The temperature sensor is fixedly connected in the first slot, and a heat transfer element is disposed in the second slot. The two sides of the heat transfer element are respectively connected to the temperature sensor and the individual battery cells, and the side of the temperature sensor away from the heat transfer element is electrically connected to the data acquisition circuit board. This utility model restricts the relative displacement between the temperature sensor and the data acquisition circuit board through the fixing bracket and the positioning pressure plate, making the connection between the temperature sensor, the heat transfer element, and the data acquisition circuit board more stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack. Background Technology

[0002] The power battery pack contains a CCS (integrated busbar) assembly, which includes components such as a busbar, information acquisition unit, and electrical isolation board. The information acquisition unit is responsible for collecting and transmitting electrical and temperature information from the individual battery cells in the battery pack. Temperature information is often collected using a temperature sensor (NTC), which is in contact with the wall of the battery cell and receives the temperature, converting it into an electrical signal that is transmitted to the information processing unit. However, due to vibrations caused by the vehicle's operating environment, the connection between the NTC and the battery cell or electrical isolation board is easily affected by environmental factors, resulting in loosening, displacement, or even breakage of the acquisition point, making temperature acquisition unstable. Therefore, there is an urgent need to provide a highly reliable fixing structure. Utility Model Content

[0003] The technical problem to be solved by this utility model is: how to make the installation of the stable sensor more stable and reliable. In order to solve the above technical problem, this utility model provides a battery pack, including a battery cell, a temperature sensor, a data acquisition circuit board, an isolation plate, and a fixing component.

[0004] The temperature sensor is used to collect temperature data of the individual battery cells;

[0005] The acquisition circuit board is used to acquire the temperature data collected by the temperature sensor.

[0006] The isolation plate is disposed between the data acquisition circuit board and the battery cell; the isolation plate includes a second slot and a heat transfer element; the fixing assembly includes a fixing bracket and a positioning plate; the fixing bracket is fixedly disposed on the side of the isolation plate facing the data acquisition circuit board; the fixing bracket has a through first slot, and the second slot is corresponding to the first slot, in which the temperature sensor is disposed, and in which the heat transfer element is disposed, with the temperature sensor and the battery cell respectively connected to both sides of the heat transfer element, and the side of the temperature sensor away from the heat transfer element electrically connected to the data acquisition circuit board; the positioning plate is located on the side of the data acquisition circuit board away from the first slot and at least partially covers the first slot.

[0007] Preferably, the separator further includes a first positioning post, which is located on the side of the separator away from the battery cell. The fixing bracket is provided with a first positioning hole corresponding to the first positioning post, and the first positioning post passes through the first positioning hole to fix the fixing bracket to the separator.

[0008] Preferably, a busbar is provided on the side of the isolation plate away from the battery cell, and the busbar is spaced apart from the acquisition circuit board; the fixing bracket includes a first end and a second end arranged opposite to each other, the first end is fixedly disposed between the isolation plate and the busbar, and the second end is fixedly disposed between the isolation plate and the acquisition circuit board; the first slot is located at the second end, and the first positioning hole is disposed between the first end and the second end.

[0009] Preferably, the isolation plate is provided with a second positioning post, and the busbar is provided with a second positioning hole corresponding to the second positioning post, with the second positioning post passing through the second positioning hole.

[0010] Preferably, the second end is provided with a third positioning post, and at least one side of the first slot is provided with the third positioning post; the positioning plate is provided with a third positioning hole corresponding to the third positioning post, and the third positioning post passes through the third positioning hole.

[0011] Preferably, there are two of each of the third positioning posts and the third positioning holes, and the first slot is located between the two third positioning posts.

[0012] Preferably, along the direction from the isolation plate to the acquisition circuit board, the thickness of the first end is smaller than the thickness of the second end.

[0013] Preferably, the acquisition circuit board includes a main board and a connecting end that are electrically connected. The connecting end is electrically connected to the temperature sensor and is at least partially located between the fixed bracket and the positioning plate. The connecting end is provided with a through fourth positioning hole corresponding to the third positioning post, and the third positioning post is sequentially inserted through the fourth positioning hole and the third positioning hole.

[0014] Preferably, the connecting end also has a through first observation hole; the first observation hole is spaced apart from the fourth positioning hole, and along the direction from the isolation plate to the acquisition circuit board, the first observation hole and the temperature sensor are alternately arranged;

[0015] The positioning plate has a second observation hole that corresponds to the first observation hole;

[0016] The second observation hole, the first observation hole, and the first slot are connected in sequence.

[0017] Preferably, at least one of the first positioning post, the second positioning post, and the third positioning post is a thermoplastic post.

[0018] Compared with the prior art, the battery pack provided in this embodiment of the present invention has the following advantages: In this invention, the installation and fixing bracket is restricted by the isolation plate, and the position of the temperature sensor is restricted by the first slot in the fixing bracket, thereby fixing the position of the temperature sensor and preventing displacement of the temperature sensor during transportation, which would cause the sampling point to loosen. In addition, the position of the heat transfer element is restricted by the second slot corresponding to the first slot, so that the two sides of the temperature sensor can stably contact the heat transfer element and the sampling circuit board, further improving the stability of the temperature sensor assembly state and the stability of the subsequent temperature detection state. Furthermore, the relative displacement between the temperature sensor and the sampling circuit board is restricted by the positioning pressure plate, thereby making the process of the sampling circuit board collecting temperature data more stable and reliable. Attached Figure Description

[0019] Figure 1 This is a perspective view of the battery pack including the overall structure of the CCS component in this utility model;

[0020] Figure 2 This is a top view of the CCS component of this utility model;

[0021] Figure 3 This is a utility model Figure 2 A partial view at point A in the middle;

[0022] Figure 4 This is a utility model Figure 3 Sectional view at point BB;

[0023] Figure 5 This is a utility model Figure 2 A schematic diagram of the explosion structure.

[0024] In the diagram: 1. A single battery cell;

[0025] 2. Temperature sensor;

[0026] 3. Acquisition circuit board; 31. Main board; 32. Connecting terminal; 321. First observation hole; 33. Fourth positioning hole;

[0027] 4. Isolation plate; 41. Second slot; 42. Heat transfer component; 43. First positioning post; 44. Second positioning post; 45. First groove; 46. Second groove;

[0028] 5. Fixing component; 51. Fixing bracket; 52. First slot; 53. First positioning hole; 54. First end; 55. Second end; 56. Third positioning post; 57. Positioning plate; 571. Third positioning hole; 572. Second observation hole;

[0029] 6. Busbar; 61. Second positioning hole. Detailed Implementation

[0030] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0031] like Figures 1 to 5 As shown, a preferred embodiment of the present invention provides a battery pack, which includes a battery cell 1, a temperature sensor 2, a data acquisition circuit board 3, an isolation plate 4, and a fixing component 5.

[0032] Temperature sensor 2 is used to collect temperature data of battery cell 1;

[0033] The acquisition circuit board 3 is used to acquire the temperature data collected by the temperature sensor 2;

[0034] The isolation plate 4 is disposed between the acquisition circuit board 3 and the battery cell 1; the isolation plate 4 includes a second slot 41 and a heat transfer element 42.

[0035] The fixing component 5 includes a fixing bracket 51 and a positioning plate 57. The fixing bracket 51 is fixedly disposed on the side of the isolation plate 4 facing the acquisition circuit board 3. The fixing bracket 51 has a through first slot 52, and the isolation plate 4 has a second slot 41 corresponding to the first slot 52. A temperature sensor 2 is disposed in the first slot 52, and a heat transfer element 42 is disposed in the second slot 41. The two sides of the heat transfer element 42 are respectively connected to the temperature sensor 2 and the battery cell 1. The side of the temperature sensor 2 away from the heat transfer element 42 is electrically connected to the acquisition circuit board 3. The positioning plate 57 is located on the side of the acquisition circuit board 3 away from the first slot 52 and at least partially covers the first slot 52.

[0036] Specifically, in this embodiment, an additional fixing bracket 51 is provided. The temperature sensor 2 is fixedly housed by a first slot 52 in the middle of the fixing bracket 51, and the fixing bracket 51 is fixedly mounted on the isolation plate 4. This restricts the displacement of the temperature sensor 2 and provides external protection, preventing the temperature sensor 2 from shifting due to external vibration or impact during transport, thus avoiding loosening of the sampling point. This makes the installation of the temperature sensor 2 more stable and reliable, and subsequent temperature data acquisition more stable and reliable. Furthermore, this embodiment also provides a second slot 41 on the isolation plate 4 to house the heat transfer element 42. This restricts the relative displacement between the temperature sensor 2, the heat transfer element 42, and the acquisition circuit board 3, further stabilizing the relative position between the temperature sensor 2 and the heat transfer element 42, preventing offset. Additionally, the heat transfer element 42 transfers the temperature from the surface of the battery cell 1 to the temperature sensor 2, ensuring the accuracy of subsequent temperature acquisition.

[0037] Meanwhile, the positioning plate 57 can stably press the acquisition circuit board 3 above the temperature sensor 2, so that the connection between the acquisition circuit board 3 and the temperature sensor 2 remains stable. When faced with vibration and impact during transportation, the connection between the acquisition circuit board 3 and the temperature sensor 2 will not be easily broken, thus ensuring the stability of subsequent temperature detection.

[0038] The heat transfer element 42 can be thermally conductive adhesive, and the gap between the first slot 52 and the temperature sensor 2 can be filled with fixative or similar materials for fixation.

[0039] In some embodiments, a first positioning post 43 is provided on the side of the separator plate 4 away from the battery cell 1, and a first positioning hole 53 is provided on the fixing bracket 51 corresponding to the first positioning post 43. The first positioning post 43 passes through the first positioning hole 53 so that the fixing bracket 51 is fixed to the separator plate 4.

[0040] Specifically, during assembly, the first positioning post 43 is inserted into the first positioning hole 53 to limit the relative displacement between the partition plate 4 and the fixed bracket 51, thereby fixing the fixed bracket 51 onto the partition plate 4. Furthermore, in a preferred embodiment, multiple first positioning posts 43 and first positioning holes 53 can be correspondingly provided to prevent the fixed bracket 51 from rotating relative to the partition plate 4. Alternatively, a groove or other structure can be used to prevent the fixed bracket 51 from rotating relative to the partition plate 4. In addition, based on the first positioning post 43, processes such as glue injection or hot-melt can be used to further stabilize the connection between the fixed bracket 51 and the partition plate 4.

[0041] In some embodiments, a busbar 6 is provided on the side of the isolation plate 4 away from the battery cell 1, and the busbar 6 is spaced apart from the acquisition circuit board 3; the fixing bracket 51 includes a first end 54 and a second end 55 opposite to each other, the first end 54 is fixedly disposed between the isolation plate 4 and the busbar 6, and the second end 55 is fixedly disposed between the isolation plate 4 and the acquisition circuit board 3; the first slot 52 is located at the second end 55, and the first positioning hole 53 is disposed between the first end 54 and the second end 55.

[0042] Specifically, in this embodiment, the fixing bracket 51 is divided into two parts: a first end 54 and a second end 55. The first end 54 and the second end 55 are respectively clamped between the isolation plate 4 and the busbar 6 and between the isolation plate 4 and the acquisition circuit board 3. The setting of the two ends of the fixing bracket 51 realizes the relative fixation between the isolation plate 4, the busbar 6 and the acquisition circuit board 3, making the relative position between the isolation plate 4, the busbar 6 and the acquisition circuit board 3 more stable and less prone to displacement due to external impacts or vibrations. The setting of the first positioning hole 53 also makes the state of the entire structure more stable and reliable.

[0043] In one specific embodiment, a first groove 45 is provided on the side of the separator 4 away from the battery cell 1, and a second groove 46 is provided on the inner bottom wall of the first groove 45. A busbar 6 is placed in the first groove 45, and the second groove 46 is used to accommodate a fixing bracket 51. The busbar 6 and the separator 4 clamp and restrict the fixing bracket 51. The separator 4 fixes the busbar 6 through the first groove 45 and installs the fixing bracket 51 in the second groove 46. The tight installation between the busbar 6 and the separator 4 clamps the fixing bracket 51, thereby restricting the displacement of the fixing bracket 51. This allows the fixing bracket 51 to better withstand the vibration and impact during transportation without easily shifting its position, thus ensuring the stability of the temperature sensor 2 and ensuring the stability of subsequent temperature detection.

[0044] The second groove 46 is adapted to the fixed bracket 51, with a portion of the second groove 46 located inside the first groove 45 and the other portion located outside the first groove 45. Corresponding to the fixed bracket 51, the first end 54 of the fixed bracket 51 is located between the isolation plate 4 and the busbar 6 and is clamped and fixed by the isolation plate 4 and the busbar 6. The second end 55 of the fixed bracket 51 is used to accommodate the temperature sensor 2 and is located below the acquisition circuit board 3, so that the temperature sensor 2 can make stable contact with the acquisition circuit board 3, improving the stability of subsequent temperature detection. The fixed bracket 51 is L-shaped and adapted to the second groove 46, which can better limit the displacement of the fixed bracket 51, so that the fixed bracket 51 is not easily deviated from its original position due to vibration and impact during transportation. In other embodiments, the fixed bracket 51 can also be modified to other shapes according to actual needs.

[0045] Furthermore, the isolation plate 4 is provided with a second positioning post 44, and the busbar 6 is provided with a second positioning hole 61 corresponding to the second positioning post 44, with the second positioning post 44 passing through the second positioning hole 61.

[0046] Specifically, the second positioning post 44 and the second positioning hole 61 further increase the stability of the connection between the busbar 6 and the isolation plate 4, thereby improving the stability of the clamping of the fixed bracket 51. In some other embodiments, glue can also be injected into the second positioning hole 61 to further improve the stability of the connection between the busbar 6 and the isolation plate 4.

[0047] In some embodiments, the second end 55 is provided with a third positioning post 56, and the third positioning post 56 is located on at least one side of the first slot 52; the positioning plate 57 is provided with a third positioning hole 571 corresponding to the third positioning post 56, and the third positioning post 56 passes through the third positioning hole 571.

[0048] For example, there may be only one third positioning post 56, which is located on one side of the first slot 52; there may be multiple third positioning posts 56, all located on the same side of the first slot 52; or there may be multiple third positioning posts 56, which are distributed on opposite sides of the first slot 52.

[0049] Furthermore, there are two third positioning posts 56 and two third positioning holes 571, with the first slot 52 located between the two third positioning posts 56.

[0050] In one specific embodiment, the cooperation between the third positioning post 56 and the third positioning hole 571 allows the positioning plate 57 to be pressed more stably onto the acquisition circuit board 3, further ensuring the stability of the connection between the acquisition circuit board 3 and the temperature sensor 2. Furthermore, after the third positioning post 56 is inserted into the third positioning hole 571 on the positioning plate 57, a potting process or a hot-melt process can be used to stably connect the third positioning post 56 and the positioning plate 57, further improving the stability of the connection between the acquisition circuit board 3 and the temperature sensor 2. Two third positioning posts 56 and three positioning holes 571 are provided, with a first slot 52 located between the two third positioning posts 56. The two third positioning posts 56 effectively restrict the installation state of the positioning plate 57, preventing the position of the positioning plate 57 from shifting or rotating during transport. This allows the positioning plate 57 to effectively press and fix the acquisition circuit board 3 above the temperature sensor 2, making it less likely for the connection between the acquisition circuit board 3 and the temperature sensor 2 to loosen or detach.

[0051] In some embodiments, along the direction from the isolation plate 4 to the acquisition circuit board 3, the thickness of the first end 54 is smaller than the thickness of the second end 55.

[0052] Specifically, since the acquisition circuit board 3 is typically made of flexible circuit board material, to avoid damage from pulling, it should be kept on the same plane as much as possible during installation. Currently, a groove is usually set on the surface of the separator 4 away from the battery cell 1 to accommodate the busbar 6. The acquisition circuit board 3 is installed on the surface of the separator 4 away from the battery cell 1. Thus, when the acquisition circuit board 3 needs to acquire electrical information (such as current value, voltage value), the acquisition end of the acquisition circuit board 3 on the busbar 6 will be on the same plane as other parts. Since the first end 54 is clamped between the separator 4 and the busbar 6, the relatively small thickness of the first end 54 can be easily inserted between the two, avoiding the busbar 6 being too high and affecting the use of vertical space. The second end 55 is set at the end of the acquisition circuit board 3 with the temperature sensor 2. The relatively larger thickness of the second end 55 will compensate for the thickness of the busbar 6 itself, so that the acquisition end of the acquisition circuit board 3 with the temperature sensor 2 is kept on the same horizontal plane as other parts of the acquisition circuit board 3, thereby avoiding the problem of pulling damage caused by the height difference between the acquisition end and other parts.

[0053] The greater thickness of the first slot 52 results in a greater thickness, which better restricts the position of the temperature sensor 2 and provides more comprehensive protection for the temperature sensor 2, ensuring the stability and reliability of the entire device during use.

[0054] In some embodiments, the acquisition circuit board 3 includes a main board 31 and a connection end 32 that are electrically connected. The connection end 32 is electrically connected to the temperature sensor 2 and is at least partially located between the fixed bracket 51 and the positioning plate 57. The connection end 32 is provided with a through fourth positioning hole 33 corresponding to the third positioning post 56. The third positioning post 56 is sequentially disposed in the fourth positioning hole 33 and the third positioning hole 571.

[0055] Specifically, during the actual assembly process, it is necessary to separately extend a connection end 32 from the acquisition circuit board 3 to fix it to the temperature sensor 2. The connection end 32 is provided with a fourth positioning hole 33. The end of the third positioning post 56 passes sequentially through the fourth positioning hole 33 on the acquisition circuit board 3 and the third positioning hole 571 on the positioning plate 57, thereby stably limiting the position of the connection end 32 and making the connection between the connection end and the temperature sensor 2 more stable, preventing relative displacement between the temperature sensor 2 and the connection end 32. It should also be noted that in practical applications, the main board 31 has multiple connection ends 32 connected along its length, each connection end 32 corresponding to a temperature sensor 2. Each temperature sensor 2 is used to collect the temperature data of the corresponding battery cell 1, and a fixing bracket 51 can be provided at each temperature sensor 2.

[0056] In some embodiments, the connection end 32 also has a through first observation hole 321; the first observation hole 321 and the fourth positioning hole 33 are spaced apart, and along the direction from the isolation plate 4 to the acquisition circuit board 3, the first observation hole 321 and the temperature sensor 2 are alternately arranged.

[0057] The positioning plate 57 has a second observation hole 572 that corresponds to the first observation hole 321;

[0058] The second observation hole 572, the first observation hole 321, and the first slot hole 52 are connected in sequence.

[0059] Specifically, the alignment of the temperature sensor 2 and the heat transfer element 42 can be more easily observed through the first observation hole 321 and the second observation hole 572, and it can be determined whether there is a problem with the connection between the two temperature sensors 2, thereby providing guidance for factory assembly or subsequent maintenance.

[0060] In some embodiments, at least one of the first positioning post 43, the second positioning post 44, and the third positioning post 56 is a thermosetting post. In this embodiment, after the fixing bracket 51 is positioned and connected with the isolation plate 4, the positioning pressure plate 57, and the acquisition circuit board 3, the ends of the first positioning post 43 and the third positioning post 56 can be melted through a thermosetting process, thereby achieving a stable connection between the fixing bracket 51, the isolation plate 4, the acquisition circuit board 3, and the positioning pressure plate 57, further improving the stability of the overall connection state. Preferably, all three of the first positioning post 43, the second positioning post 44, and the third positioning post 56 are thermosetting posts.

[0061] In summary, this utility model embodiment provides a battery pack that uses a fixed bracket 51 and a positioning plate 57 to clamp and limit the displacement of the temperature sensor 2. The fixed bracket 51, the positioning plate 57, the isolation plate 4, and the acquisition circuit board 3 can be fixedly connected by the first positioning post 43 and the third positioning post 56. This makes the connection between the temperature sensor 2 and the heat transfer element 42 and the connection end 32 more stable and reliable, and the connection between the temperature sensor 2 and the heat transfer element 42 and the connection end 32 is not easily damaged by vibration and impact during transportation.

[0062] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A battery pack, characterized in that, include: Battery cell (1); Temperature sensor (2) is used to collect temperature data of the battery cell (1); The acquisition circuit board (3) is used to acquire the temperature data collected by the temperature sensor (2); An isolation plate (4) is disposed between the acquisition circuit board (3) and the battery cell (1); the isolation plate (4) includes a second slot (41) and a heat transfer element (42); The fixing component (5) includes a fixing bracket (51) and a positioning plate (57); the fixing bracket (51) is fixedly disposed on the side of the isolation plate (4) facing the acquisition circuit board (3); the fixing bracket (51) is provided with a through first slot (52), and a second slot (41) is provided corresponding to the first slot (52). The temperature sensor (2) is disposed in the first slot (52), and the heat transfer element (42) is disposed in the second slot (41). The temperature sensor (2) and the battery cell (1) are respectively connected to the two sides of the heat transfer element (42). The side of the temperature sensor (2) away from the heat transfer element (42) is electrically connected to the acquisition circuit board (3); the positioning plate (57) is located on the side of the acquisition circuit board (3) away from the first slot (52) and at least partially covers the first slot (52).

2. The battery pack according to claim 1, characterized in that, The isolation plate (4) further includes a first positioning post (43), which is located on the side of the isolation plate (4) away from the battery cell (1). The fixing bracket (51) is provided with a first positioning hole (53) corresponding to the first positioning post (43). The first positioning post (43) passes through the first positioning hole (53) so that the fixing bracket (51) is fixed to the isolation plate (4).

3. The battery pack according to claim 2, characterized in that, The isolation plate (4) is provided with a busbar (6) on the side away from the battery cell (1), and the busbar (6) is spaced apart from the acquisition circuit board (3); the fixed bracket (51) includes a first end (54) and a second end (55) arranged opposite to each other, the first end (54) is fixedly arranged between the isolation plate (4) and the busbar (6), and the second end (55) is fixedly arranged between the isolation plate (4) and the acquisition circuit board (3); the first slot (52) is located at the second end (55), and the first positioning hole (53) is arranged between the first end (54) and the second end (55).

4. The battery pack according to claim 3, characterized in that, The isolation plate (4) is provided with a second positioning post (44), and the busbar (6) is provided with a second positioning hole (61) corresponding to the second positioning post (44), and the second positioning post (44) passes through the second positioning hole (61).

5. The battery pack according to claim 4, characterized in that, The second end (55) is provided with a third positioning post (56), and the third positioning post (56) is provided on at least one side of the first slot (52); the positioning plate (57) is provided with a third positioning hole (571) corresponding to the third positioning post (56), and the third positioning post (56) passes through the third positioning hole (571).

6. The battery pack according to claim 5, characterized in that, Two of the third positioning post (56) and the third positioning hole (571) are provided, and the first slot (52) is provided between the two third positioning posts (56).

7. The battery pack according to claim 3, characterized in that, Along the direction from the isolation plate (4) to the acquisition circuit board (3), the thickness of the first end (54) is smaller than the thickness of the second end (55).

8. The battery pack according to claim 5, characterized in that, The acquisition circuit board (3) includes a main board (31) and a connecting end (32) that are electrically connected. The connecting end (32) is electrically connected to the temperature sensor (2) and is at least partially located between the fixed bracket (51) and the positioning plate (57). The connecting end (32) is provided with a through fourth positioning hole (33) corresponding to the third positioning post (56). The third positioning post (56) is sequentially inserted into the fourth positioning hole (33) and the third positioning hole (571).

9. The battery pack according to claim 8, characterized in that, The connecting end (32) also has a through first observation hole (321); the first observation hole (321) and the fourth positioning hole (33) are spaced apart, and along the direction from the isolation plate (4) to the acquisition circuit board (3), the first observation hole (321) and the temperature sensor (2) are alternately arranged; The positioning plate (57) has a second observation hole (572) corresponding to the first observation hole (321); The second observation hole (572), the first observation hole (321), and the first slot (52) are connected in sequence.

10. The battery pack according to claim 6, characterized in that, At least one of the first positioning post (43), the second positioning post (44) and the third positioning post (56) is a hot melt post.

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