Battery system

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery system which comprises a battery core stacking body, an end plate, an acquisition unit and a battery management unit, the end plate is arranged on the end surface of the battery cell stacking body; the acquisition unit comprises an acquisition module and a flexible circuit board, the acquisition module is used for acquiring parameter information of the cell stack, the flexible circuit board is electrically connected with the acquisition module, and a plug-in connector of the flexible circuit board is arranged on the end plate; the battery management unit comprises a slave control module arranged on the end plate, and the slave control module is electrically connected with the plug-in connector. According to the utility model, the connector of the flexible circuit board and the slave control module are integrated on the end plate of the battery cell stack body, so that the strength of the end plate is enhanced, and meanwhile, the connector of the flexible circuit board and the slave control module are directly and electrically connected without reserving a space for connecting and plugging a wire harness in the prior art, so that the Y-axis space utilization rate of the battery system is improved, and the cost is reduced. Moreover, the technological process of wiring harness plugging is reduced, and the overall wiring harness cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery system. Background Art

[0002] With the vigorous development of the new energy industry, the market demand for low-cost and high-safety battery systems has gradually increased. While ensuring that the battery function is not affected, it has become a trend to simplify the structure as much as possible, improve battery safety performance and reduce costs.

[0003] Existing battery systems, which need to collect information such as voltage and temperature from the cell stack, typically use an FPC acquisition module installed on the cell stack to collect this information. The FPC connector is then connected to a slave controller via a patch harness for output. Given that existing battery systems require patch harnesses to transmit information such as voltage and temperature, and that a battery system's cell stack is typically composed of multiple cells, the patch harness typically requires at least 35mm of space. This results in a significant amount of space being taken up by the entire battery system. Furthermore, the number of patch harnesses required increases material costs and requires multiple process steps. Utility Model Content

[0004] The main purpose of the present utility model is to provide a battery system, which aims to solve the technical problems in the prior art of using connectors to transmit information such as voltage and temperature, resulting in more space being occupied in the entire battery system, and having more connectors, high material costs, and more process flows.

[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a battery system, comprising:

[0006] Battery cell stack;

[0007] an end plate, the end plate being arranged on an end surface of the battery cell stack;

[0008] A collection unit, comprising a collection module and a flexible circuit board, wherein the collection module is used to collect parameter information of the battery cell stack, the flexible circuit board is electrically connected to the collection module, and a connector of the flexible circuit board is provided on the end plate;

[0009] The battery management unit includes a slave control module arranged on the end plate, and the slave control module is electrically connected to the connector.

[0010] Furthermore, a groove is provided on the end plate, and the slave control module is at least partially accommodated in the groove.

[0011] Furthermore, a mounting hole is provided on the end plate, and the slave control module is at least partially accommodated in the mounting hole.

[0012] Furthermore, the slave control module is fixed to the end plate by snap connection or thermal riveting.

[0013] Furthermore, the height of the end plate matches the thickness of the battery cell stack.

[0014] Furthermore, the flexible circuit board includes a circuit board main body, which is arranged along the bottom of the battery cell stack, a first branch extending from the circuit board main body is electrically connected to the acquisition module, and a second branch of the circuit board main body extends from the bottom of the battery cell stack and is electrically connected to the connector located on the end plate; the plug interface of the slave control module is located at the bottom of the slave control module, and the connector can be inserted into the plug interface of the slave control module.

[0015] Furthermore, there are multiple groups of battery cell stacks, and there are multiple end plates. The multiple groups of battery cell stacks are arranged in a row along the first direction. In each row of battery cell stacks, the inner end faces of two adjacent groups of battery cell stacks are connected in series, and the end plates are arranged on the outer end faces of the outermost battery cell stacks.

[0016] Furthermore, the battery system also includes a box body, which includes a bottom plate and a first side plate connected to each other, and the multiple groups of battery cell stacks also have multiple columns along a second direction perpendicular to the first direction. The multiple columns of battery cell stacks are arranged on the bottom plate and the outer end faces of the outermost battery cell stacks in each column face the first side plate.

[0017] Furthermore, the box body also includes a second side panel having a different arrangement direction from the first side panel, the bottom panel is fixedly connected to the first side panel and the second side panel respectively, and together form a accommodating cavity, the accommodating cavity includes a staggered first accommodating cavity and a second accommodating cavity, the battery management unit also includes a main control module, the main control module is located in the first accommodating cavity, and multiple groups of battery cell stacks are located in the second accommodating cavity.

[0018] Furthermore, the master control module is connected in series with all the slave control modules via a wiring harness.

[0019] Beneficial effects:

[0020] The battery system of the present invention integrates the connector of the flexible circuit board and the slave control module on the end plate of the battery cell stack, and utilizes the thickness of the end plate to integrate them together, thereby strengthening the strength of the end plate. At the same time, by directly electrically connecting the connector of the flexible circuit board and the slave control module, the connector harness connecting the flexible circuit board connector and the slave control module in the prior art is eliminated, and there is no need to reserve space for these connector harnesses, thereby effectively saving the Y-axial space of the battery system, improving the Y-axial space utilization of the battery system, and reducing the process flow of the connector harness, thereby reducing the overall harness cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a battery system according to an embodiment of the present invention;

[0022] Figure 2 This is a structural diagram of a battery system according to an embodiment of the present invention, shown from one perspective after the box is removed;

[0023] Figure 3 This is a structural diagram of the battery system of one embodiment of the utility model from another perspective after the box is removed;

[0024] Figure 4 This is a structural diagram of an embodiment of the utility model in which a flexible circuit board and a slave control module are integrated on an end plate of a battery cell stack;

[0025] Figure 5 This is a schematic diagram of the exploded structure of a battery cell stack, a collection unit, a slave control module, and an end plate according to an embodiment of the present invention;

[0026] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of the middle V part;

[0027] Figure 7 This is a structural diagram of a battery cell stack, an end plate, and a slave control module according to an embodiment of the present invention;

[0028] Figure 8 yes Figure 7 Schematic diagram of the cross-sectional structure of the connector of the battery cell stack, end plate, slave control module and flexible circuit board along the AA section line.

[0029] in:

[0030] 100-battery system; 1-cell stack; 2-end plate; 21-mounting hole; 3-acquisition unit; 31-acquisition module; 32-flexible circuit board; 321-connector; 322-circuit board body-4-battery management unit; 41-slave control module; 411-slave controller; 412-slave control bracket; 42-master control module; 5-casing; 51-bottom plate; 52-first side panel; 53-accommodation chamber; 531-first accommodation chamber; 532-second accommodation chamber; 54-second side panel; 6-wiring harness.

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0034] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] Reference Figure 1One embodiment of the present invention provides a battery system 100, comprising a cell stack 1, an end plate 2, a collection unit 3, and a battery management unit 4. The end plate 2 is disposed on the end surface of the cell stack 1. The collection unit 3 comprises a collection module 31 and a flexible circuit board 32. The collection module 31 is configured to collect parameter information of the cell stack 1. The flexible circuit board 32 is electrically connected to the collection module 31, and a connector 321 of the flexible circuit board 32 is disposed on the end plate 2. The battery management unit 4 comprises a slave control module 41 disposed on the end plate 2, and the slave control module 41 is electrically connected to the connector 321.

[0037] In this embodiment, if Figures 4 to 8 As shown, the battery cell stack 1 includes a plurality of battery cells, and the plurality of battery cells are arranged along the Figure 4 The battery cell stack 1 is stacked in the Z-axis direction as shown. The battery cell stack 1 is a rectangular parallelepiped as a whole, and the end faces of the battery cell stack 1 refer to the end faces on the left and right sides of the rectangular parallelepiped (i.e. Figure 4 The end plates 2 are provided at the end faces of the cell stack 1 to support the electrical connection of the cells and protect the cell tabs.

[0038] Continue as Figures 4 to 8 As shown, the acquisition unit 3 includes an acquisition module 31 and a flexible printed circuit board (FPC) 32. The acquisition module 31 can collect parameter information of the battery cell stack 1, such as one or more of voltage information and temperature information. Specifically, the acquisition module 31 includes one or more of a temperature sensor and a voltage sensor. The acquisition module 31 is disposed on the flexible printed circuit board 32 and electrically connected to each other. Furthermore, the connector 321 of the flexible printed circuit board 32 is also integrated on the end plate 2 and electrically connected to the slave control module 41. As such, the parameter information of the battery cell stack 1 collected by the acquisition module 31 can be directly transmitted to the slave control module 41 of the battery management unit 4 via the connector 321 of the flexible printed circuit board 32. The slave control module 41 can then perform voltage detection, temperature detection, balancing management, and corresponding diagnostics on the cells of the battery cell stack 1. The connector 321 of the flexible circuit board 32 is directly electrically connected to the slave control module 41, eliminating the need for an intermediate connection harness (i.e., a wiring harness connecting the flexible circuit board connector and the slave control module in the prior art). Specifically, the original harness connection space of the battery system, which is about 30 mm in diameter, can be eliminated, allowing the battery system 100 to be used in various applications. Figure 4 The Y-axis space utilization is improved, and at the same time, the process flow of wiring harness is reduced, thus reducing the overall wiring harness cost. Figures 1 to 8The Y-axis direction of the battery system 100 is for illustration only. The specific orientation of the Y-axis direction of the battery system 100 is determined by the specific position of the end surface of the battery cell stack 1 and is not specifically limited here.

[0039] Furthermore, the battery cell stack 1 includes two opposite end faces, and the configuration types of the end plate 2, the connector 321 of the flexible circuit board 32, and the slave control module 41 include the following three types:

[0040] 1. An end plate 2 is provided on one end face of the battery cell stack 1. The connector 321 of the flexible circuit board 32 is provided on the end plate 2 and is electrically connected to the slave control module 41. The other end face is not provided with an end plate 2 or a connector 321 of the flexible circuit board 32.

[0041] 2. Both end faces of the battery cell stack 1 are provided with end plates 2. The connector 321 of the flexible circuit board 32 is only provided on one of the end plates 2 and is electrically connected to one slave control module 41. The other end plate 2 is not provided with the connector 321 of the flexible circuit board 32 and the slave control module 41.

[0042] 3. Both end surfaces of the battery cell stack 1 are provided with end plates 2 , and two connectors 321 are respectively provided on the two end plates 2 and electrically connected to the two slave control modules 41 .

[0043] It can be understood that the configuration type of the end plate 2 can be determined according to actual installation requirements and is not specifically limited here.

[0044] To sum up, the battery system 100 of the embodiment of the present invention integrates the connector 321 of the flexible circuit board 32 and the slave control module 41 on the end plate 2 of the battery cell stack 1, and integrates them together by utilizing the thickness of the end plate 2, thereby strengthening the strength of the end plate 2. At the same time, by directly electrically connecting the connector 321 of the flexible circuit board 32 and the slave control module 41, the connector harness connecting the flexible circuit board connector and the slave control module in the prior art is eliminated, and there is no need to reserve space for these connector harnesses, thereby effectively saving the Y-axial space of the battery system 100, improving the Y-axial space utilization of the battery system 100, and reducing the process flow of the connector harness, thereby reducing the overall harness cost.

[0045] In one embodiment, a groove is formed on the end plate 2 , and the slave control module 41 is at least partially accommodated in the groove.

[0046] In this embodiment, the thickness of the slave control module 41 is greater than the thickness of the end plate 2, and the slave control module 41 is at least partially accommodated in the groove, that is, the slave control module 41 can be embedded in the end plate 2, saving part of the thickness of the end plate 2, thereby improving the space utilization of the battery system 100 in the Y-axis direction, and also playing a role in protecting the battery cell tabs.

[0047] In one embodiment, referring to Figures 4 to 6 A mounting hole 21 is defined on the end plate 2 , and the slave control module 41 is at least partially accommodated in the mounting hole 21 .

[0048] In this embodiment, the thickness of the slave control module 41 is greater than the thickness of the end plate 2, and the slave control module 41 is at least partially accommodated in the mounting hole 21, that is, the slave control module 41 can be embedded in the end plate 2, saving part of the thickness of the end plate 2, thereby improving the space utilization of the battery system 100 in the Y-axis direction, and also playing a role in protecting the battery cell tabs.

[0049] In one embodiment, the slave control module 41 is fixed to the end plate 2 by clamping or thermal riveting.

[0050] In one embodiment, referring to Figures 4 to 6 The slave control module 41 includes a slave control device 411 and a slave control bracket 412 . The slave control device 411 is fixed on the slave control bracket 412 . The slave control bracket 412 is fixed to the end plate 2 by snapping or hot riveting.

[0051] In this embodiment, the slave controller 411 is integrated on the slave control bracket 412, and the slave control bracket 412 can be Figure 4 The shown snap connection can also be performed by heat riveting, or other fixing methods to directly connect the slave controller 411 to the connector 321 of the flexible circuit board 32 and then fix it on the end plate 2.

[0052] In one embodiment, referring to Figure 4 , the height of the end plate 2 matches the thickness of the battery cell stack 1.

[0053] In this embodiment, since the slave control module 41 is integrated with the end plate 2, when different battery systems 100 have different cell thicknesses in the cell stack 1, it is only necessary to adjust the height of the end plate 2 (e.g. Figure 4 The Z-axis height shown in the figure) makes the height of the end plate 2 match the thickness of the battery cell stack 1, so that the end plate 2 can support the electrical connection of the battery cells of the battery cell stack 1 and protect the battery cell tabs, and the slave control module 41 and the acquisition unit 3 (FPC assembly) can also be platformized.

[0054] In one embodiment, referring to Figures 4 to 6The flexible circuit board 32 includes a circuit board body 322, which is arranged along the bottom of the battery cell stack 1. The first branch extending from the circuit board body 322 is electrically connected to the acquisition module 31, and the second branch of the circuit board body 322 extends from the bottom of the battery cell stack 1 and is electrically connected to the connector 321 located on the end plate 2; the plug interface of the slave control module 41 is located at the bottom of the slave control module 41, and the connector 321 can be inserted into the plug interface of the slave control module 41.

[0055] In this embodiment, the circuit board body 322 is arranged along the bottom of the battery cell stack 1. Figure 5 As shown, the circuit board body 322 is disposed along the bottom of the cell stack 1 in the Y-axis direction. Several first branches extending from the circuit board body 322 are electrically connected to the various acquisition modules 31. A second branch of the circuit board body 322 extends from the bottom of the cell stack 1 and is electrically connected to the connector 321 of the flexible circuit board 32 located on the end plate 2. Because the plug interface of the slave control module 41 is located at the bottom of the slave control module 41, the connector 321 can be directly plugged into the plug interface at the bottom of the slave control module 41. In this way, the parameter information of the cell stack 1 collected by the acquisition module 31 can be directly transmitted to the slave control module 41 via the circuit board body 322 and connector 321 of the flexible circuit board 32, saving collection wiring harnesses and reducing overall wiring harness costs. Furthermore, since the connector 321 can be directly plugged into the bottom plug interface of the slave control module 41, the thickness of the battery system 100 in the Y-axis direction is changed from the original end plate thickness a + the connector thickness b of the flexible circuit board + the wiring harness space c (about 35 mm) to the thickness d of the slave control module 41 (the slave control module 41 is accommodated in the mounting hole 21 of the end plate 2) or the thickness d of the slave control module 41 + the partial end plate thickness e (the slave control module 41 is partially accommodated in the mounting hole 21 or groove of the end plate 2). Generally speaking, the thickness of the single-chip slave control 411 is about 15 mm. It can be seen that the Y-axial dimension of the battery system 100 is effectively reduced.

[0056] In one embodiment, referring to Figures 1 to 4 The number of the battery cell stacks 1 is multiple, the number of the end plates 2 is multiple, the multiple groups of battery cell stacks 1 are arranged in a row along the first direction, in each row of the battery cell stacks 1, the inner end faces of two adjacent groups of the battery cell stacks 1 are connected in series, and the end plates 2 are arranged on the outer end faces of the outermost battery cell stacks 1.

[0057] In this embodiment, each column of battery cell stacks 1 includes a plurality of groups of cells arranged along a first direction (eg Figure 1The battery cell stacks 1 are arranged in the Y-axis direction as shown, that is, each column of battery cell stacks 1 includes more than or equal to 2 groups of battery cell stacks 1. In each column of the battery cell stacks 1, the tabs on the inner end faces of two adjacent groups of battery cell stacks 1 are connected in series through an intermediate bus, and the tabs of the outermost battery cell stack 1 are connected in series through an end face bus, and the end plate 2 is arranged on the outer end face of the outermost battery cell stack 1, wherein the intermediate bus is used to connect in series the two battery cell tabs of the same layer in the two adjacent groups of battery cell stacks 1; and the end face bus is used to connect in series the two adjacent battery cell tabs (that is, adjacent in the Z direction) of different layers adjacent to the end face bus. For example, referring to Figure 1 and Figure 4 Each row of battery cell stacks 1 includes Figure 1 As shown, two groups of battery cell stacks are arranged in the Y-axis direction, and the tabs of the two groups of battery cell stacks are connected by an intermediate bus bar. The end plate 2 is arranged on the outer end surface of the outermost battery cell stack 1.

[0058] In one embodiment, referring to Figures 1 to 3 The battery system 100 also includes a box body 5, which includes a bottom plate 51 and a first side plate 52 connected to each other. The multiple groups of battery cell stacks 1 also have multiple columns along a second direction perpendicular to the first direction. The multiple columns of battery cell stacks 1 are arranged on the bottom plate 51 and the outer end faces of the outermost battery cell stacks 1 in each column face the first side plate 52.

[0059] In this embodiment, the box body 5 includes a bottom plate 51 and a first side plate 52 connected to each other. The bottom plate 51 is used to support multiple groups of battery cell stacks 1. The box body 5 may include one or more side plates. It can be understood that the first side plate 52 in this embodiment is Figure 1 In other embodiments, the first side plate 52 may also be Figure 1 The arrangement direction of the plurality of battery cell stacks 1 is adjusted accordingly. Figures 1 to 3 , an end face of each column of battery cell stack 1 is provided with an end plate 2, and the end plate 2 is integrated with a connector 321 of a flexible circuit board 32. At this time, the side plate opposite to the end plate 2 is the first side plate 52 (i.e. Figure 1 In another embodiment, both outer end faces of the outermost battery cell stack 1 in each column are provided with end plates 2, that is, there are two end plates 2, and each end plate 2 is integrated with a connector 321 of a flexible circuit board 32. In this case, the two side plates opposite to the two end plates 2 are both first side plates 52 ( Figure 1 lower and upper side panels in the ).

[0060] The plurality of battery cell stacks 1 are arranged along a second direction perpendicular to the first direction (eg Figure 1The X-axis direction shown in FIG2 also has multiple columns (ie, greater than or equal to 2 columns), each column of battery cell stacks 1 includes multiple groups of cells along the first direction (eg, Figure 1 The battery cell stacks 1 are arranged in the Y-axis direction (as shown). Multiple columns of battery cell stacks 1 are arranged on the bottom plate 51, and the orientation of each column of battery cell stacks 1 is consistent. The outer end faces of the outermost battery cell stacks 1 in each column are all facing the first side plate 52, so that the slave control modules 41 of each column of battery cell stacks 1 are uniformly arranged on one side of the outer end face of the outermost battery cell stacks 1 in each column (that is, all face the first side plate 52). Since there is no need to reserve space between the first side plate 52 and the outer end face of the outermost battery cell stacks 1 in each column for the flexible circuit board connector and the slave control module wiring harness, the Y-axis space of the battery system 100 is effectively saved, thereby improving the integration of the battery system 100.

[0061] In other embodiments, multiple groups of the battery cell stacks 1 have multiple columns along a second direction perpendicular to the first direction, and each column of the battery cell stacks 1 includes only one group of battery cell stacks 1 arranged along the first direction, and the outer end faces of each column of the battery cell stacks 1 are all facing the first side plate 52, so that the slave control modules 41 of each column of the battery cell stacks 1 are uniformly arranged on one side of the outer end face of each column of the battery cell stacks 1 (that is, all facing the first side plate 52). Since there is no need to reserve space for the flexible circuit board connector and the slave control module wiring harness between the first side plate 52 and the outer end face of each column of the battery cell stacks 1, the Y-axial space of the battery system 100 is effectively saved, thereby improving the integration of the battery system 100.

[0062] In one embodiment, referring to Figure 1 The box body 5 also includes a second side plate 54 arranged in a different direction from the first side plate 52. The bottom plate 51 is fixedly connected to the first side plate 52 and the second side plate 54 respectively, and together form a accommodating cavity 53. The accommodating cavity 53 includes a staggered first accommodating cavity 531 and a second accommodating cavity 532. The battery management unit 4 also includes a main control module 42, which is located in the first accommodating cavity 531, and multiple groups of the battery cell stacks 1 are located in the second accommodating cavity 532.

[0063] In this embodiment, the second side panel 54 is a side panel of the housing 5 other than the first side panel 52 and arranged in a different direction. The bottom panel 51 is fixedly connected to the first and second side panels 52, 54, respectively, and together they form a housing chamber 53. The housing chamber 53 includes a first housing chamber 531 and a second housing chamber 532. The main control module 42 is mounted in the first housing chamber 531, and the multiple battery cell stacks 1 are mounted in the second housing chamber 532. This allows the main control module 42 and the battery cell stacks 1 to be isolated from each other while remaining tightly connected within the same device. This achieves a compact layout of the main control module 42 and the multiple battery cell stacks 1, effectively utilizing the internal space of the battery system 100 and improving the integration and overall performance of the battery system 100. Furthermore, since the main control module 42 and the battery cell stacks 1 are located in different housing chambers, maintenance or replacement of one portion can be performed independently without affecting the other portions, simplifying the maintenance process and improving maintenance efficiency.

[0064] In one embodiment, referring to Figures 1 to 3 The master control module 42 is connected in series with all the slave control modules 41 through the wiring harness 6 .

[0065] In this embodiment, the master control module 42 is connected in series with all the slave control modules 41 through the wiring harness 6. Specifically, Figure 3 As shown, each slave control module 41 is connected in sequence through the wiring harness 6 at the top, and then the wiring harness 6 is connected to the master control module 42. In other words, the master control module 42 is connected to all the slave control modules 41 in sequence through the wiring harness 6. By directly electrically connecting the connector 321 of the flexible circuit board 32 and the slave control module 41, the master control module 42 is connected in series with the slave control modules 41 through the wiring harness 6, eliminating the original 30mm thick communication patch harness. The entire wiring harness is directly connected from the existing FPC acquisition module to one of the slave control modules, then to the other slave control modules, and finally to the master control module. The master control module 42 is directly connected to all the slave control modules 41 through the communication wiring harness 6 with a diameter of about 3mm, effectively saving the Y-axis space of the battery system 100, improving the Y-axis space utilization of the battery system 100, and reducing the overall wiring harness cost.

[0066] It is understandable that in other embodiments, the wiring harness 6 is not limited to being arranged at the top of each slave control module 41, but can also be arranged at other positions to achieve a compact layout of the battery system 100 in the Y-axis direction.

[0067] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A battery system, characterized in that: include: Battery cell stack; an end plate, the end plate being arranged on an end surface of the battery cell stack; A collection unit, comprising a collection module and a flexible circuit board, wherein the collection module is used to collect parameter information of the battery cell stack, the flexible circuit board is electrically connected to the collection module, and a connector of the flexible circuit board is provided on the end plate; The battery management unit includes a slave control module arranged on the end plate, and the slave control module is electrically connected to the connector.

2. The battery system according to claim 1, wherein: A groove is formed on the end plate, and the slave control module is at least partially accommodated in the groove.

3. The battery system according to claim 1, wherein: A mounting hole is formed on the end plate, and the slave control module is at least partially accommodated in the mounting hole.

4. The battery system according to claim 2 or 3, characterized in that: The slave control module is fixed to the end plate by clamping or thermal riveting.

5. The battery system according to claim 1, wherein: The height of the end plate matches the thickness of the battery cell stack.

6. The battery system according to claim 1, wherein: The flexible circuit board includes a circuit board main body, which is arranged along the bottom of the battery cell stack. The first branch extending from the circuit board main body is electrically connected to the acquisition module. The second branch of the circuit board main body extends from the bottom of the battery cell stack and is electrically connected to the connector located on the end plate; the plug interface of the slave control module is located at the bottom of the slave control module, and the connector can be inserted into the plug interface of the slave control module.

7. The battery system according to claim 1, wherein: There are multiple groups of battery cell stacks, and there are multiple end plates. The multiple groups of battery cell stacks are arranged in a row along the first direction. In each row of battery cell stacks, the inner end faces of two adjacent groups of battery cell stacks are connected in series, and the end plates are arranged on the outer end faces of the outermost battery cell stacks.

8. The battery system according to claim 7, characterized in that: It also includes a box body, which includes a bottom plate and a first side plate connected to each other. The multiple groups of battery cell stacks also have multiple columns along a second direction perpendicular to the first direction. The multiple columns of battery cell stacks are arranged on the bottom plate and the outer end faces of the outermost battery cell stacks in each column face the first side plate.

9. The battery system according to claim 8, characterized in that The box body also includes a second side panel arranged in a different direction from the first side panel. The bottom panel is fixedly connected to the first side panel and the second side panel respectively, and together form a accommodating cavity. The accommodating cavity includes a staggered first accommodating cavity and a second accommodating cavity. The battery management unit also includes a main control module, which is located in the first accommodating cavity, and multiple groups of battery cell stacks are located in the second accommodating cavity.

10. The battery system according to claim 9, characterized in that: The master control module is connected in series with all the slave control modules via a wiring harness.

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