Acquisition system, battery pack and vehicle

Abstract

The utility model relates to a battery technology, in particular to an acquisition system, a battery pack and a vehicle, the acquisition system comprises an acquisition board, and the acquisition board is suitable for being arranged on one of two side surfaces of a battery cell group along the thickness direction; the connecting piece is suitable for being connected with the acquisition plate and each battery cell unit of the battery cell group, so that the same electrode end of each battery cell unit is connected with the acquisition plate and the anti-explosion valve, and the anti-explosion valve is arranged on the side surface of the battery cell group along the length direction or the width direction. The collecting system is simple in structure and low in production cost, and the influence of the anti-explosion valve on the collecting system can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to battery technology, and particularly to an acquisition system, a battery pack and a vehicle. Background Art

[0002] In existing cell module acquisition systems, the electrical signals and temperature signals of cells are mostly acquired through FPC (flexible printed circuit board) and transmitted to BIC (battery information collector) through sampling lines. Limited by the FPC structure and the arrangement of cells in the cell module, voltage acquisition needs to be carried out on both the front and back sides of the module, making the sampling circuit relatively complex and costly. Moreover, the position of the FPC in the prior art blocks the explosion-proof valve of the cell. When a certain cell undergoes thermal runaway, the explosion of the explosion-proof valve will damage the FPC, resulting in the failure of the acquisition system function. Summary of the Utility Model

[0003] The first technical problem to be solved by the utility model is to provide an acquisition system with a simple sampling circuit, low cost, and capable of effectively avoiding the influence of the cell explosion-proof valve on the acquisition system function.

[0004] The second technical problem to be solved by the utility model is to provide a battery pack with a stable acquisition system function.

[0005] The third technical problem to be solved by the utility model is to provide a vehicle with low production cost.

[0006] To solve the above technical problems, the utility model provides an acquisition system, including an acquisition board adapted to be arranged on one of the two side surfaces of the cell group along the thickness direction; a connecting piece adapted to be connected to the acquisition board and each cell unit of the cell group, so that the same electrode ends of each cell unit are connected to the acquisition board; and an explosion-proof valve arranged on the side surface of the cell group along the length direction or the width direction.

[0007] Preferably, in the cell group, the positive and negative electrodes of each cell unit are arranged alternately. One of the first ends of the odd-numbered cell units and the even-numbered cell units is provided with a second housing connecting portion, and the second end is provided with a first housing connecting portion. The first housing connecting portion is connected to the cell pole of the corresponding cell unit at the second end. The second housing connecting portion is connected to the acquisition board through the connecting piece; the cell poles of the other of the odd-numbered cell units and the even-numbered cell units at the first end are connected to the acquisition board through the connecting piece; wherein, the first end is one of the ends where the cell poles are located, and the second end is the end opposite to the first end.

[0008] Preferably, the explosion-proof valve is provided at the first end portion, and the first end portion is one end of the battery cell group along the length direction.

[0009] Preferably, the connecting member includes a first connecting member and a second connecting member. The first connecting member is provided at the first end portion, and the second connecting member is provided at the second end portion. The electrode posts of the adjacent battery cell units in the battery cell group are sequentially connected in series through the first connecting member and the second connecting member.

[0010] Preferably, the connecting member further includes a third connecting member and a fourth connecting member. One end of the third connecting member is connected to the second housing connecting portion, and the other end is connected to the acquisition board. One end of the fourth connecting member is connected to the first connecting member, and the other end is connected to the acquisition board.

[0011] More preferably, the connecting member further includes a fifth connecting member. The fifth connecting member is correspondingly arranged with the third connecting member, and one end of the fifth connecting member is connected to the first housing connecting portion, and the other end is connected to the second connecting member.

[0012] Further preferably, both the first housing connecting portion and the second housing connecting portion are provided on the bosses at the ends where the electrode posts of the battery cell units are located.

[0013] Preferably, the acquisition system of the present invention further includes a temperature acquisition device and a plastic bracket. One end of the temperature acquisition device is electrically connected to the battery cell unit, and the other end is electrically connected to the acquisition board.

[0014] Preferably, the acquisition system of the present invention further includes a plastic bracket. The plastic bracket includes a connecting member installation groove, an acquisition board installation position, acquisition board fixing columns, and a temperature acquisition device installation position.

[0015] The present invention also provides a battery pack, which includes a battery cell group and the above-mentioned acquisition system.

[0016] In addition, the present invention provides a vehicle, which includes the above-mentioned battery pack.

[0017] Preferably, the vehicle further includes a front frame assembly, a rear frame assembly, and a battery pack housing. The battery pack housing is provided with a frame joint, and the frame joint is used to connect the front frame assembly and the rear frame assembly.

[0018] The acquisition system of the present utility model can effectively avoid the influence of the explosion-proof valve disposed on the side surface of the battery cell group along the length direction or the width direction on the acquisition board by arranging the acquisition board on one of the two side surfaces of the battery cell group along the thickness direction. When the battery cell undergoes thermal runaway, the acquisition function of the acquisition board for the battery cell remains effective. The battery cell unit and the acquisition board are connected through a connecting member, so that the same electrode ends of each battery cell unit can be connected to the acquisition board, thereby enabling the acquisition system of the present utility model to acquire the battery cell voltages of all battery cell units at the acquisition end, simplifying the acquisition circuit, and thus reducing the cost.

[0019] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings forming a part of the present utility model are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present utility model, but do not constitute a limitation to the present utility model. In the drawings:

[0021] Figure 1 is the acquisition principle diagram of the acquisition system of the present utility model;

[0022] Figure 2 is the structural schematic diagram of a specific implementation manner of the acquisition system of the present utility model;

[0023] Figure 3 is Figure 2 the structural schematic diagram in another direction;

[0024] Figure 4 is Figure 2 the enlarged schematic diagram of part A in

[0025] Figure 5 is Figure 3 the enlarged schematic diagram of part B in

[0026] DESCRIPTION OF THE REFERENCE NUMERALS

[0027] 1 - battery cell group, 10 - battery cell unit, 101 - first housing connection part, 102 - second housing connection part, 2 - acquisition board, 201 - reinforcing board, 3 - first connecting member, 4 - second connecting member, 5 - third connecting member, 6 - fourth connecting member, 7 - fifth connecting member, 8 - temperature acquisition device, 9 - plastic bracket, 901 - connecting member installation groove, 902 - acquisition board fixing column, 903 - temperature acquisition device installation position, 11 - total negative output electrode, 12 - total positive output electrode. SPECIFIC IMPLEMENTATION

[0028] The specific embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present utility model, and the protection scope of the present utility model is not limited to the following specific embodiments.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "arrangement", "installation", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] In the description of the present utility model, in order to clearly illustrate the technical solution of the present utility model, some orientation terms are involved. For example, the width direction of the battery cell group 1, that is, the arrangement direction of the battery cell units 10 in the battery cell group 1, is represented by X, the length direction of the battery cell group 1 is represented by Y, and the thickness direction of the battery cell group 1 is represented by Z, and the Z direction is perpendicular to the X direction and the Y direction. "Up, down, left, right, front, and back" can all be observed from the above coordinate system. It should be understood that unless otherwise stated, the indicated orientation or positional relationship is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features.

[0032] All terms used in the present utility model have the same meanings as those understood by those of ordinary skill in the art to which the present utility model belongs, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as those, should be interpreted as having meanings consistent with their meanings in the context of the related art, and should not be interpreted in an idealized or overly formal sense, unless clearly defined as such here.

[0033] Reference Figures 1 to 5, the present utility model provides a collection system, including a collection board 2, a connecting member and an explosion-proof valve. The collection board 2 is a flexible printed circuit board, and the collection board 2 is adapted to be disposed on one of the two side surfaces of the battery cell group 1 along the thickness direction. Specifically, the collection board 2 can be disposed on the upper surface or the lower surface of the battery cell group 1. The explosion-proof valve can be disposed on the side surface of the battery cell group 1 along the length direction or the width direction. Preferably, the collection board 2 can be disposed on the upper surface or the lower surface of the battery cell group 1 near the end where the battery cell poles of each battery cell unit 10 in the battery cell group 1 are located, and the explosion-proof valve is disposed on the front end face or the rear end face of the battery cell group 1. In the prior art, the explosion-proof valves of the battery cells are often disposed at the ends where the battery cell poles of each battery cell in the battery cell group 1 are located. When a certain battery cell undergoes thermal runaway, the explosion-proof valve of the battery cell will burst open. Compared with the prior art where the explosion-proof valve of the battery cell and the collection board 2 are disposed at the same end, the collection board 2 of the present utility model avoids the position of the explosion-proof valve of the battery cell, and can effectively avoid the influence of the bursting open of the explosion-proof valve of the battery cell on the collection function of the collection board 2 when the battery cell undergoes thermal runaway. The collection board 2 includes a copper foil substrate and a connector. The copper foil substrate can be used to transmit the voltage signal of the battery cell unit 10, and the connector can be used to output the voltage signal externally. The connecting member is adapted to be connected to the collection board 2 and each battery cell unit 10 of the battery cell group 1, so that the same electrode ends of each battery cell unit 10 are connected to the collection board 2. Specifically, the battery cell group 1 includes a plurality of battery cell units 10 arranged alternately with positive and negative electrodes, and in the Fx direction (i.e., Figure 3 the direction shown in the collection system), the battery cell housing on the battery cell unit 10 at the odd position can be connected to the battery cell pole through the connecting member, and then in the X direction (i.e., Figure 2 the direction shown in the collection system), the battery cell housing of the battery cell unit 10 at the odd position can be connected to the collection board 2 through the connecting member, so as to be able to obtain the voltage of the battery cell pole of the battery cell unit 10 at the odd position in the Fx direction by detecting the voltage on the battery cell housing of the battery cell unit 10 at the odd position. The battery cell housing of the battery cell unit 10 at the even position is not connected to the battery cell pole, and the battery cell pole of the battery cell unit 10 at the even position can be directly connected to the collection board 2 in the X direction through the connecting member to detect the voltage of the battery cell unit 10 at the even position. Through the above settings, the collection system of the present utility model can directly collect the voltages of all battery cell units 10 in the battery cell group 1 in the X direction. Compared with the prior art where the collection ends for collecting the voltages of each battery cell unit 10 in the battery cell group 1 are separately disposed at the two end faces of the battery cell group 1, the collection system of the present utility model simplifies the collection circuit and saves the material cost.

[0034] In some embodiments, the positive and negative electrodes of each cell unit 10 in the cell group 1 are arranged alternately. One of the first ends of the odd-numbered cell units 10 and the even-numbered cell units 10 is provided with a second housing connection portion 102, and the second end is provided with a first housing connection portion 101. The first housing connection portion 101 is connected to the cell pole of the cell unit 10 corresponding to the second end, and the second housing connection portion 102 is connected to the acquisition board 2 through a connecting member; the cell poles of the other of the odd-numbered cell units 10 and the even-numbered cell units 10 at the first end are connected to the acquisition board 2 through a connecting member. The above-mentioned first end is one of the ends where each cell pole is located, and the second end is the end opposite to the first end. Exemplarily, the first end is the end of the cell group 1 parallel to the XZ plane, and the second end is the end of the cell group 1 parallel to the FxZ plane. The acquisition board 2 is arranged on the upper end face of the cell group 1 near the first end. The cell poles of the cell unit 10 include a positive electrode tab and a negative electrode tab. The positive electrode tabs of the odd-numbered cell units 10 are at the second end, and the negative electrode tabs are at the first end. The positive electrode tabs of the even-numbered cell units 10 are at the first end, and the negative electrode tabs are at the second end. Along the arrangement direction of the cell units 10, the positive electrode tabs and the negative electrode tabs are arranged at intervals. At the first end, the positive electrode tabs of the even-numbered cell units 10 can be electrically connected to the negative electrode tabs of the adjacent odd-numbered cell units 10 through a connecting member. At the second end, the negative electrode tabs of the even-numbered cell units 10 are electrically connected to the positive electrode tabs of the adjacent odd-numbered cell units 10 through a connecting member, so as to realize the series connection of the odd-numbered cell units 10 and the even-numbered cell units 10 in the cell group 1. At the first end, the second housing connection portion 102 of the odd-numbered cell units 10 is connected to the acquisition board 2 through a connecting member, and the positive electrode tabs of the even-numbered cell units 10 can be connected to the acquisition board 2 through a connecting member. At the second end, the positive electrode tabs of the odd-numbered cell units 10 can be connected to the first housing connection portion 101 through a connecting member, so that the acquisition board 2 can detect the voltages of all the cell units 10 in the cell group 1 at the first end through the connecting member, simplifying the detection circuit of the acquisition board 2 and reducing the production cost. Figure 2 and Figure 3 in the cell group 1, the end parallel to the XZ plane, and the second end is the end of the cell group 1 parallel to the FxZ plane. The acquisition board 2 is arranged on the upper end face of the cell group 1 near the first end. The cell poles of the cell unit 10 include a positive electrode tab and a negative electrode tab. The positive electrode tabs of the odd-numbered cell units 10 are at the second end, and the negative electrode tabs are at the first end. The positive electrode tabs of the even-numbered cell units 10 are at the first end, and the negative electrode tabs are at the second end. Along the arrangement direction of the cell units 10, the positive electrode tabs and the negative electrode tabs are arranged at intervals. At the first end, the positive electrode tabs of the even-numbered cell units 10 can be electrically connected to the negative electrode tabs of the adjacent odd-numbered cell units 10 through a connecting member. At the second end, the negative electrode tabs of the even-numbered cell units 10 are electrically connected to the positive electrode tabs of the adjacent odd-numbered cell units 10 through a connecting member, so as to realize the series connection of the odd-numbered cell units 10 and the even-numbered cell units 10 in the cell group 1. At the first end, the second housing connection portion 102 of the odd-numbered cell units 10 is connected to the acquisition board 2 through a connecting member, and the positive electrode tabs of the even-numbered cell units 10 can be connected to the acquisition board 2 through a connecting member. At the second end, the positive electrode tabs of the odd-numbered cell units 10 can be connected to the first housing connection portion 101 through a connecting member, so that the acquisition board 2 can detect the voltages of all the cell units 10 in the cell group 1 at the first end through the connecting member, simplifying the detection circuit of the acquisition board 2 and reducing the production cost.

[0035] In some embodiments, the explosion-proof valve is arranged at the first end, and the first end is one of the two side faces of the cell group 1 along the length direction. In the prior art, the acquisition board 2 and the cell explosion-proof valve are arranged at the same end, and the position of the acquisition board 2 blocks the explosion-proof valve. When the cell undergoes thermal runaway, the explosion of the explosion-proof valve will damage the acquisition board 2, resulting in the failure of the acquisition system function and the battery management system being unable to read the cell voltage, thus leading to the problem that the main circuit relay cannot be effectively controlled. Exemplarily, the acquisition board 2 is arranged on the upper surface of the cell group 1, while the explosion-proof valve is arranged at the first end of the cell group 1. The position of the acquisition board 2 avoids the cell explosion-proof valve. Then, when the explosion-proof valve explodes, the cell voltage can still be acquired.

[0036] In some embodiments, the connecting member includes a first connecting member 3 and a second connecting member 4. A plurality of each of the first connecting member 3 and the second connecting member 4 may be provided. The first connecting member 3 is disposed at the first end portion, and the second connecting member 4 is disposed at the second end portion. The electrode columns of adjacent battery cell units 10 in the battery cell group 1 are sequentially connected in series through the first connecting member 3 and the second connecting member 4 to form the battery cell group 1. Specifically, each of the first connecting member 3 and the second connecting member 4 may be an aluminum bar or a copper-aluminum composite conductive connecting member.

[0037] In some embodiments, referring to Figure 2 , the connecting member further includes a third connecting member 5 and a fourth connecting member 6. A plurality of each of the third connecting member 5 and the fourth connecting member 6 may be provided. One end of the third connecting member 5 may be welded to the second housing connecting portion 102, and the other end is welded to the collecting board 2. One end of the fourth connecting member 6 is welded to the first connecting member 3, and the other end is welded to the collecting board 2. Preferably, each of the third connecting member 5 and the fourth connecting member 6 may be a nickel sheet.

[0038] In some embodiments, referring to Figure 3 , the connecting member further includes a fifth connecting member 7. The fifth connecting member 7 is correspondingly arranged with the third connecting member 5, and one end of the fifth connecting member 7 is connected to the first housing connecting portion 101, and the other end is connected to the second connecting member 4. Specifically, at the second end portion of the battery cell group 1, if the second connecting member 4 is connected to the positive electrode tab of the battery cell unit 10 at an odd position, the positive electrode of the battery cell unit 10 at the odd position can be conducted to the first housing connecting portion 101 of the battery cell unit at the odd position through the fifth connecting member 7, and further conducted to the second housing connecting portion 102. Then, the voltage collected at the second housing connecting portion 102 is the same as the positive electrode voltage of the battery cell unit 10 at the odd position. Preferably, the fifth connecting member 7 is a nickel sheet.

[0039] In some embodiments, referring to Figure 4 and Figure 5 , each of the first housing connecting portion 101 and the second housing connecting portion 102 may be a boss provided at the end portion where the electrode column of the battery cell unit 10 is located.

[0040] In some embodiments, referring to Figure 2, the acquisition system of the present utility model further includes a temperature acquisition device 8 and a plastic bracket 9. One end of the temperature acquisition device 8 is electrically connected to the battery cell unit 10, and the other end is electrically connected to the acquisition board 2. Specifically, the temperature acquisition device 8 can be an NTC wire harness, including sub-parts such as an NTC chip, NTC terminals, NTC wires, connectors, etc. Among them, the NTC terminals are welded at the first connector 3 to fix the position of the NTC chip. The NTC wires can be used to transmit signals, and the connectors can be used to output signals externally. The temperature acquisition device 8 can be correspondingly arranged with each first connector 3, that is, the number of the temperature acquisition devices 8 can be the same as the number of the first connectors 3. In addition, the number of the temperature acquisition devices 8 can also be selected according to actual needs. The plastic bracket 9 includes a connector installation groove 901, an acquisition board installation position, an acquisition board fixing column 902, and a temperature acquisition device installation position 903. At the first end, the first connector 3 is fixed in the connector installation groove 901, and adjacent first connectors 3 are spaced apart by the plastic bracket 9 to achieve insulation between the first connectors 3. The acquisition board 2 is placed in the acquisition board installation position, and the reinforcing plate 201 on the acquisition board 2 can be used to position and fix the acquisition board 2 to the plastic bracket 9. Further, the acquisition board 2 is fixed to the plastic bracket 9 through the acquisition board fixing column 902. The temperature acquisition device installation position 903 is suitable for the temperature acquisition device wire harness to pass through, facilitating the installation of the temperature acquisition device 8 and the neatness of the wire harness. It should be noted that the above-mentioned NTC represents a negative temperature coefficient thermistor and can be used for temperature acquisition.

[0041] The acquisition system of the present utility model further includes a total negative output pole 11 and a total positive output pole 12. The negative voltage of the first battery cell unit 10 near the origin of the XYZ coordinate axis can be acquired from the total negative output pole 11, and the positive voltage of the last battery cell unit 10 far from the origin of the XYZ coordinate axis can be acquired from the total positive output pole 12. The voltage value of each battery cell unit 10 can be obtained by subtracting the positive voltage of the previous-level battery cell unit 10 from the positive voltage of each battery cell unit 10. The voltage value of the battery cell unit 10 near the origin of the XYZ coordinate axis can be obtained by subtracting the negative voltage acquired from the total negative output pole 11 from the positive voltage acquired from the second housing connection part 102.

[0042] Based on the above embodiments, as an optimal embodiment of the present utility model, the acquisition system includes a battery cell group 1, a collection board 2, a third connector 5, a fourth connector 6, a first connector 3, a second connector 4, a temperature acquisition device 8, and a plastic bracket 9. The battery cell group 1 includes a plurality of battery cell units 10 arranged with positive and negative electrodes alternating. Each battery cell unit 10 is connected in series through the first connector 3 and the second connector 4. That is, the first connector 3 connects the positive electrode of the battery cell unit 10 at an even position to the negative electrode of the battery cell unit 10 at an odd position, and the second connector 4 connects the positive electrode of the battery cell unit 10 at an odd position to the negative electrode of the battery cell unit 10 at an even position. The battery cell unit 10 includes a first housing connection portion 101 and a second housing connection portion 102. At the first end of the acquisition system, one end of the third connector 5 is connected to the second housing connection portion 102 of the battery cell unit 10 at an odd position, and the other end is connected to the collection board 2. One end of the fourth connector 6 is connected to the first connector 3 (i.e., connected to the positive electrode of the battery cell unit 10 at an even position), and the other end is connected to the collection board 2. At the second end, the second connector 4 is connected to the first housing connection portion 101 (i.e., connected to the positive electrode of the battery cell unit 10 at an odd position). The temperature acquisition device 8 is installed on the first connector 3. The plastic bracket 9 includes a connector installation groove 901, a collection board installation position, a collection board fixing column 902, and a temperature acquisition device installation position 903. The collection board 2 is provided on the upper surface of the battery cell group 1, and the battery cell explosion-proof valve is provided at the first end of the battery cell group 1.

[0043] Through the above technical solution, for the acquisition system provided in the first aspect of the present utility model, the positive poles of the battery cell units 10 at odd positions are located at the second end. By connecting the positive poles of the battery cell units 10 at odd positions to the first housing connection parts 101 of the battery cell units 10 at odd positions, the positive pole voltages of the battery cell units 10 at odd positions can be acquired through the second housing connection parts 102 at the first end. Moreover, the positive poles of the battery cell units 10 at even positions are at the first end, enabling the acquisition system of the present utility model to acquire the voltages of all the battery cell units 10 at the first end. Compared with the acquisition system in the prior art that acquires voltages at the first end and the second end, the material cost is saved. The acquisition board 2 of the present utility model avoids the positions of the battery cell explosion-proof valves. Therefore, when the battery cells are in thermal runaway, the battery management system can continuously obtain the voltage values of the battery cell group, enabling the battery management system to effectively control the main circuit relay when the battery cells are in thermal runaway. The plastic bracket 9 of the present utility model is an injection-molded part, which provides installation positions for the acquisition board 2, the first connecting member 3, the second connecting member 4, and the temperature acquisition device 8, thereby making the overall acquisition system structure more stable and reliable. And it can insulate the adjacent first connecting members 3 and the adjacent second connecting members 4 through its own structural characteristics, effectively avoiding the problem in the acquisition system of the prior art that only realizes the insulation of each component through bonding of insulating sheets, resulting in the detachment of the insulating sheets and insulation failure after the glue fails under long-term vibration and high and low temperature cycling conditions.

[0044] In the second aspect of the present utility model, a battery pack is provided. The battery pack includes a battery cell group 1 and the acquisition system of the above embodiment. Therefore, the battery pack has all the beneficial effects of the acquisition system and will not be elaborated here too much.

[0045] In the third aspect of the present utility model, a vehicle is provided. The vehicle includes a battery pack housing, a front frame assembly, a rear frame assembly, and the acquisition system provided in the first aspect of the present utility model or the battery pack provided in the second aspect of the present utility model. A frame joint is provided on the battery pack housing, and both the front frame assembly and the rear frame assembly can be connected to the battery pack through the frame joint. The vehicle has all the beneficial effects of the acquisition system and will not be elaborated here too much.

[0046] The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present utility model, various simple modifications can be made to the technical solutions of the present utility model, and these simple modifications all fall within the protection scope of the present utility model.

[0047] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present utility model will not separately describe various possible combinations.

[0048] In addition, any combination can be made among the various different embodiments of the present utility model, as long as it does not violate the idea of the present utility model, and it should also be regarded as the content disclosed by the present utility model.

Claims

1. A collection system, characterized in that, Comprising: A collecting board (2), the collecting board (2) being adapted to be arranged on one of the two side surfaces of the battery cell group (1) along the thickness direction; A connecting member, the connecting member being adapted to be connected to the collecting board (2) and each battery cell unit (10) of the battery cell group (1) so that the same electrode ends of each battery cell unit (10) are connected to the collecting board (2); An explosion-proof valve, the explosion-proof valve being arranged on the side surface of the battery cell group (1) along the length direction or the width direction.

2. The acquisition system according to claim 1, wherein The positive and negative electrodes of each battery cell unit (10) in the battery cell group (1) are arranged alternately. One of the first ends of the odd-numbered battery cell units (10) and the even-numbered battery cell units (10) is provided with a second housing connecting portion (102), and the second end is provided with a first housing connecting portion (101). The first housing connecting portion (101) is connected to the battery cell pole column of the corresponding battery cell unit (10) at the second end. The second housing connecting portion (102) is connected to the collecting board (2) through the connecting member; the battery cell pole columns of the other of the odd-numbered battery cell units (10) and the even-numbered battery cell units (10) at the first end are connected to the collecting board (2) through the connecting member; wherein, the first end is one of the ends where the battery cell pole columns are located, and the second end is the end opposite to the first end.

3. The acquisition system according to claim 2, wherein The explosion-proof valve is arranged at the first end, and the first end is one end of the battery cell group (1) along the length direction.

4. The acquisition system according to claim 2, characterized in that, The connecting member includes a first connecting member (3) and a second connecting member (4). The first connecting member (3) is arranged at the first end, and the second connecting member (4) is arranged at the second end. The battery cell pole columns of adjacent battery cell units (10) in the battery cell group (1) are connected in series in sequence through the first connecting member (3) and the second connecting member (4).

5. The acquisition system according to claim 4, wherein The connecting member further includes a third connecting member (5) and a fourth connecting member (6). One end of the third connecting member (5) is connected to the second housing connecting portion (102), and the other end is connected to the collecting board (2). One end of the fourth connecting member (6) is connected to the first connecting member (3), and the other end is connected to the collecting board (2).

6. The acquisition system according to claim 5, characterized in that The connecting member further includes a fifth connecting member (7). The fifth connecting member (7) is arranged corresponding to the third connecting member (5), and one end of the fifth connecting member (7) is connected to the first housing connecting portion (101), and the other end is connected to the second connecting member (4).

7. The acquisition system according to claim 6, characterized in that, Both the first housing connecting portion (101) and the second housing connecting portion (102) are bosses arranged at the end of the battery cell unit (10) where the battery cell pole column is located.

8. The acquisition system according to claim 2, wherein It further includes a temperature collecting device (8). One end of the temperature collecting device (8) is electrically connected to the battery cell unit (10), and one end is electrically connected to the collecting board (2).

9. The acquisition system according to claim 2, wherein It further includes a plastic bracket (9). The plastic bracket (9) includes a connecting member installation groove (901), a collecting board installation position, a collecting board fixing column (902), and a temperature collecting device installation position (903).

10. A battery pack, characterized in that, It includes a battery cell group (1) and the acquisition system according to any one of claims 1 to 9.

11. A vehicle, characterized in that, It includes the battery pack according to claim 10.

12. The vehicle according to claim 11, characterized in that, It further includes a front frame assembly, a rear frame assembly, and a battery pack housing. The battery pack housing is provided with a frame joint for connecting the front frame assembly and the rear frame assembly.

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