Battery pack

Abstract

The embodiment of the utility model provides a battery pack. The battery pack comprises a battery module composed of a plurality of battery packs; the sampling parts are fixedly mounted on two opposite sides of the battery module so as to acquire state parameters of the battery module; a BMS board; the BMS board is communicated with the sampling component, so that the state parameters are transmitted to the BMS board; the BMS board is provided with a total negative end elastic connecting piece, a total negative end locking terminal, a total positive end locking terminal and a signal end female seat. The main board is provided with a total negative end bonding pad, a total negative end screw hole, a total positive end screw hole and a signal end male head; the total negative end elastic connecting piece abuts against the total negative end bonding pad. When the total negative end locking terminal is fixed to the total negative end screw hole, the total negative end elastic connecting piece is compressed; and the total positive end locking terminal is fixed at the total positive end screw hole, and the signal end male head is inserted into the signal end female seat, so that communication connection is formed between the mainboard and the BMS board. The battery pack has the advantages of simple assembly process, small size and low comprehensive cost.

Description

Technical Field

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

[0002] Currently, battery packs in energy storage devices are typically equipped with a BMS (Battery Management System). When connecting the BMS board to the main board, the following wiring sequence must be strictly followed: first connect the main negative terminal, then connect the signal lines, and finally connect the main positive terminal. This wiring sequence effectively ensures the safety and stability of the connection process.

[0003] However, with increasing user demands for high-rate charge / discharge performance in energy storage devices and higher requirements for wireless design of battery packs, traditional wiring methods face numerous challenges. For example, when the main positive and negative terminals of the motherboard simultaneously contact the corresponding terminals of the BMS board, excessive instantaneous current may cause the motherboard chip to break down, leading to motherboard damage and requiring rework. To avoid this problem, wire connections are usually necessary, requiring employees to strictly follow the correct sequence. Nevertheless, in high-rate charge / discharge scenarios, due to the large current, traditional battery packs require thicker wires for wire connections. This not only significantly increases material and processing costs but also increases the wiring radius, further expanding the space required for the connection structure.

[0004] Therefore, traditional battery packs, when using wire connection schemes, have obvious drawbacks such as complex assembly processes, large product size, and high overall cost. Utility Model Content

[0005] The battery pack provided by this utility model aims to solve at least one defect of existing battery packs.

[0006] This utility model provides a battery pack. The battery pack includes:

[0007] Battery module; the battery module is composed of several battery packs arranged in an orderly manner;

[0008] Sampling components; the sampling components are fixedly installed on opposite sides of the battery module to collect the status parameters of the battery module;

[0009] BMS board; the BMS board is connected to the sampling component so that the status parameters are transmitted to the BMS board; the BMS board is provided with a total negative terminal elastic connector, a total negative terminal locking terminal, a total positive terminal locking terminal and a signal terminal socket;

[0010] The motherboard has a negative terminal pad, a negative terminal screw hole, a positive terminal screw hole, and a signal male connector. The negative terminal elastic connector abuts against the negative terminal pad. When the negative terminal locking terminal is fixed to the negative terminal screw hole, the negative terminal elastic connector is compressed.

[0011] The positive terminal locking terminal is fixed at the positive terminal screw hole, and the signal terminal male is inserted into the signal terminal female to form a communication connection between the motherboard and the BMS board.

[0012] In some embodiments, the sampling component has two connection terminals and several pairs of contact springs; each pair of contact springs is connected to a corresponding battery pack, so that the sampling component can acquire the state parameters of each battery pack;

[0013] The BMS board has two connectors, and the two connectors are respectively adapted to the two connection terminals to form a communication connection between the BMS board and the sampling component, at which time the status parameters are transmitted to the BMS board.

[0014] In some embodiments, the state parameters include at least:

[0015] Voltage parameters, current parameters, and / or temperature parameters for each of the battery packs.

[0016] In some embodiments, the battery pack further includes:

[0017] A motherboard support component; the motherboard support component is mounted on the battery module, and the motherboard is mounted on the motherboard support component;

[0018] A housing component; the housing component forms an accommodating space, and the battery module, the sampling component, the BMS board, and the main board are all housed within the accommodating space;

[0019] An insulating component; the insulating component is disposed between the inner wall surfaces of the sampling component and the housing component, and is located within the accommodating space.

[0020] In some embodiments, the motherboard support component includes:

[0021] A motherboard insulating sheet and a motherboard support frame; the motherboard support frame is fixed on the battery module, and the motherboard insulating sheet is disposed between the motherboard and the motherboard support frame.

[0022] In some embodiments, the two opposite sides of the battery module are respectively a first side and a second side; the battery pack includes:

[0023] At least two battery cells; the two ends of the battery cells are located on the first side and the second side, respectively.

[0024] In some embodiments, the sampling component includes:

[0025] A first sampling plate and a second sampling plate; the first sampling plate is disposed on the first side, and the second sampling plate is disposed on the second side.

[0026] In some embodiments, the two connection terminals are respectively a first connection terminal disposed on the first sampling board and a second connection terminal disposed on the second sampling board;

[0027] The plurality of contact springs are respectively a plurality of first contact springs disposed on the first sampling plate and a plurality of second contact springs disposed on the second sampling plate.

[0028] In some embodiments, the first sampling board includes:

[0029] The first busbar metal sheet, the first connecting terminal, and a plurality of first contact springs; the first connecting terminal is disposed on the first busbar metal sheet;

[0030] One end of each of the first contact springs is located at the edge of the first busbar metal sheet, and the other end of each of the first contact springs extends away from the first busbar metal sheet;

[0031] The first busbar can collect first state parameters of several battery packs on the first side; the first connection terminal cooperates with a corresponding connector on the BMS board to transmit the first state parameters to the BMS board.

[0032] In some embodiments, the second sampling board includes:

[0033] The second busbar metal plate, the second connecting terminal, and a plurality of second contact springs; the second connecting terminal is disposed on the second busbar metal plate;

[0034] One end of each of the second contact springs is disposed at the edge of the second busbar metal sheet, and the other end of each of the second contact springs extends away from the second busbar metal sheet;

[0035] The second busbar can collect the second state parameters of several battery packs on the second side; the second connection terminal cooperates with another corresponding connector on the BMS board to transmit the second state parameters to the BMS board;

[0036] The first state parameter and the second state parameter together form the state parameter.

[0037] At least one beneficial effect of the battery pack provided by this utility model embodiment is that, compared with traditional battery packs, this battery pack achieves an orderly wireless connection, which not only has the advantage of simple assembly, but also prevents damage to the chips on the motherboard by requiring the connection sequence when the BMS board outputs to the motherboard. The connection sequence is as follows: the total negative of the motherboard first contacts the total negative of the BMS board. When the elastic connector at the total negative end is compressed, the total negative of the motherboard and the total negative of the BMS board are fully connected. At this time, the signal and total positive of the motherboard and the BMS board are then connected. Furthermore, this battery pack uses a sampling component to replace the sampling harness of traditional battery packs, and uses male and female signal terminals to replace the use of signal lines. This not only simplifies the connection process between the battery module and the BMS board, but also simplifies the assembly process between the BMS board and the motherboard, and improves the reliability and safety of the battery pack. At the same time, it also reduces the size of the battery pack and effectively reduces the overall cost of the battery pack. Attached Figure Description

[0038] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are designated as the same elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0039] Figure 1 An exploded view of the battery pack provided in an embodiment of this utility model;

[0040] Figure 2 A cross-sectional view of the battery pack provided in an embodiment of the present invention, showing the state in which the elastic connector at the negative end just contacts the negative end pad.

[0041] Figure 3 This is a cross-sectional schematic diagram of the battery pack provided in an embodiment of the present invention with the elastic connector at the negative end compressed.

[0042] Reference numerals: 100, Battery pack; 1, Battery module; 11, Battery group; 111, Battery cell; 2, Sampling component; 21, First sampling board; 22, Second sampling board; 201, Connecting terminal; 202, Contact spring; 211, First connecting terminal; 212, First busbar metal piece; 213, First contact spring; 221, Second connecting terminal; 222, Second busbar metal piece; 223, Second contact spring; 3, BMS board; 301, Connector; 302, Total negative terminal elastic connector; 303, Total negative terminal locking terminal; 304, Total positive terminal locking terminal; 305, Signal terminal female connector; 4, Main board; 401, Total negative terminal pad; 402, Total negative terminal screw hole; 403, Total positive terminal screw hole; 404, Signal terminal male connector; 5, Main board support component; 51, Main board insulating sheet; 52, Main board support frame; 6, Bottom shell; 7, Insulating component. Detailed Implementation

[0043] The present invention will now be described in detail with reference to specific embodiments. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0044] It should be noted that, unless otherwise expressly specified and limited, the terms “transfer to,” “insert to,” “away from,” “extend,” “toward,” “insertion,” etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "installation," "fitting," "connection," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixing" can be bolt fixing, snap-fit ​​fixing, or glue fixing. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. "A plurality" or "several" means two or more. In addition, "and / or" includes any and all combinations of one or more of the related listed items. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0045] To make the objectives, technical solutions, and advantages of this utility model clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] The term "total positive" refers to the total positive electrode formed by connecting the positive electrodes of all individual battery cells in the battery module; while "total positive electrode of the BMS board" can be understood as the location where the total positive electrode of the battery module is connected to the BMS board; similarly, "total positive electrode of the main board" can be understood as the location where it is connected to the "total positive electrode of the BMS board".

[0047] The term "total negative" refers to the total negative terminal formed by connecting the negative terminals of all battery cells in the battery module; while "total negative of the BMS board" can be understood as the location where the total negative terminal of the battery module is connected to the BMS board; similarly, "total negative of the main board" can be understood as the location where it is connected to the "total negative of the BMS board".

[0048] Figure 1 This is an exploded view of the battery pack provided in an embodiment of the present invention. Figure 2 This is a cross-sectional view of the battery pack provided in an embodiment of the present invention, showing the state in which the elastic connector at the negative end just contacts the negative end pad. Figure 3 This is a cross-sectional schematic diagram of the battery pack provided in an embodiment of the present invention with the elastic connector at the negative end compressed.

[0049] Please see Figures 1-3 The battery pack 100 includes: a battery module 1, a sampling component 2, a BMS board 3, and a main board 4.

[0050] Among them, the battery module 1 is composed of several battery packs 11 arranged in an orderly manner.

[0051] In addition, the sampling component 2 is fixedly installed on both sides of the battery module 1 to collect the status parameters of the battery module 1.

[0052] In addition, the BMS board 3 is connected to the sampling component so that the status parameters are transmitted to the BMS board 3; the BMS board 3 is provided with a total negative terminal elastic connector 302, a total negative terminal locking terminal 303, a total positive terminal locking terminal 304 and a signal terminal socket 305.

[0053] The main negative end elastic connector 302 can be a spring, spring sheet, spring assembly or spring pin with telescopic capability.

[0054] It should be noted that the motherboard 4 is provided with a negative terminal pad 401, a negative terminal screw hole 402, a positive terminal screw hole 403, and a signal terminal male connector 404; the negative terminal elastic connector 302 abuts against the negative terminal pad 401; when the negative terminal locking terminal 303 is fixed to the negative terminal screw hole 402, the negative terminal elastic connector 302 is compressed.

[0055] It is understandable that the positive terminal locking terminal 304 is fixed at the positive terminal screw hole 403, and the signal terminal male connector 404 is inserted into the signal terminal female connector 305 so that a communication connection is formed between the main board 4 and the BMS board 3.

[0056] In some embodiments, the sampling component 2 has two connection terminals 201 and several pairs of contact springs 202; each pair of contact springs 202 is connected to a corresponding battery pack 11 so that the sampling component 2 can acquire the state parameters of each battery pack 11.

[0057] In this embodiment of the application, the BMS board 3 has two connectors 301, and the two connectors 301 are respectively adapted to two connection terminals 201 so that a communication connection is formed between the BMS board 3 and the sampling component 2, and the above-mentioned status parameters are transmitted to the BMS board 3.

[0058] This battery pack 100 uses a sampling component 2 to replace the sampling harness of a traditional battery pack, uses the interaction of a connecting terminal 201 and a connector 301 to replace the harness connection of a traditional battery pack, uses a general negative terminal elastic connector 302 to first contact the general negative terminal pad 401 of the BMS board 3, and fixes the general negative terminal locking terminal 303 to the general negative terminal screw hole 402 to replace the general negative connection harness of a traditional battery pack, uses a general positive terminal locking terminal 304 to fix to the general positive terminal screw hole 403 to replace the general positive connection harness of a traditional battery pack, and uses the insertion of a signal terminal male and a signal terminal female to replace... The sampling component 2 replaces the signal harness of the traditional battery pack, thus achieving wireless connection. This ensures that the battery pack 100 can achieve high-rate charging and discharging without increasing material and processing costs due to thicker sampling harnesses. At the same time, the use of sampling component 2 to replace the sampling harness of the traditional battery pack reduces the wiring radius, thereby reducing the structural space required for harness connection and reducing the volume of the battery pack 100. In summary, compared with traditional battery packs, the battery pack 100 has the advantages of simple assembly process, smaller size, and lower overall cost.

[0059] In this embodiment, the motherboard 4 is first assembled onto the motherboard support component 5 so that the elastic connector 302 on the BMS board 3, which is used to connect the "total negative of the motherboard", contacts the total negative terminal pad 401 of the motherboard 4. In this way, the "total negative of the motherboard" can contact the "total negative of the BMS board" first, so as to prevent the capacitor inside the battery pack 100 from generating a charging and discharging effect due to the total negative and total positive not being connected in the correct order, thereby generating a momentary high voltage impact and causing damage to the chips on the motherboard 4.

[0060] Specifically, the connection sequence of the battery pack 100 is as follows: when the main board 4 is assembled, the negative terminal locking terminal 303 is fixed to the negative terminal screw hole 402. At this time, the negative terminal elastic connector 302 is in a fully compressed state, which can ensure that the "main board negative" is fully and reliably connected to the "BMS board negative"; then the signal terminal male is inserted into the signal terminal female; finally, the positive terminal locking terminal 304 is fixed to the positive terminal screw hole 403, thereby ensuring the reliability of the connection.

[0061] To further explain, the above-mentioned connection sequence of the battery pack 100 can prevent damage to the motherboard 4 caused by chip breakdown. It can also simplify the connection process between the battery module 1 and the BMS board 3, as well as the assembly process between the BMS board 3 and the motherboard 4, thereby improving the reliability and safety of the battery pack 100. Furthermore, it can reduce the size of the battery pack 100 and effectively reduce the overall cost of the battery pack 100.

[0062] In some embodiments, such as Figures 1-3 As shown, the state parameters include at least the voltage parameters, current parameters, and / or temperature parameters of each battery pack 11.

[0063] In some embodiments, combined with Figures 1-3 It is known that the battery pack 100 also includes: a motherboard support component 5, a housing component (the complete housing component is not shown in the figure, only the bottom shell 6 of the housing component is shown) and an insulating component 7.

[0064] In this embodiment of the application, the motherboard support component 5 is mounted on the battery module 1, and the motherboard 4 is mounted on the motherboard support component 5.

[0065] The housing component has an internal space for housing, and the battery module 1, sampling component 2, BMS board 3 and main board 4 are all housed within the housing space.

[0066] In addition, the insulating component 7 is disposed between the sampling component 2 and the inner wall surface of the housing component, and is located within the accommodating space.

[0067] In some embodiments, according to Figures 1-3 It can be seen that the motherboard support component 5 includes: motherboard insulating sheet 51 and motherboard support frame 52.

[0068] It should be noted that the motherboard support bracket 52 is fixed on the battery module 1, and the motherboard insulating sheet 51 is disposed between the motherboard 4 and the motherboard support bracket 52.

[0069] In some embodiments, by Figures 1-3 It can be seen that the two sides opposite to each other of the battery module 1 are the first side and the second side, respectively.

[0070] In this embodiment of the application, the battery pack 11 includes at least two battery cells 111.

[0071] Specifically, the two extremes of the battery cell 111 are located on the first side and the second side, respectively; in other words, the sampling component 2 is fixedly installed on the two extremes of the battery pack 100 (the two extremes are the positive and negative terminals).

[0072] In some embodiments, the sampling component 2 includes a first sampling plate 21 and a second sampling plate 22.

[0073] It is understandable that the first sampling plate 21 is located on the first side, and the second sampling plate 22 is located on the second side.

[0074] In some embodiments, refer to Figures 1-3 It can be seen that the two connection terminals 201 are respectively the first connection terminal 211 disposed on the first sampling plate 21 and the second connection terminal 221 disposed on the second sampling plate 22.

[0075] In some embodiments, please refer to Figures 1-3 The plurality of contact springs 202 are respectively a plurality of first contact springs 213 disposed on the first sampling plate 21 and a plurality of second contact springs 223 disposed on the second sampling plate 22.

[0076] In some embodiments, please continue reading Figures 1-3 The first sampling board 21 includes: a first busbar metal sheet 212, a first connection terminal 211, and a plurality of first contact springs 213.

[0077] The first connection terminal 211 is disposed on the first bus metal sheet 212.

[0078] In addition, one end of several first contact springs 213 is located at the edge of the first busbar metal sheet 212, and the other end of several first contact springs 213 extends away from the first busbar metal sheet 212.

[0079] In addition, the first busbar metal plate 212 can collect the first state parameters of several battery packs 11 on the first side; the first connection terminal 211 cooperates with a corresponding connector 301 on the BMS board 3 to transmit the first state parameters to the BMS board 3.

[0080] In some embodiments, such as Figures 1-3 As shown, the second sampling board 22 includes: a second busbar metal sheet 222, a second connection terminal 221, and a plurality of second contact springs 223.

[0081] Specifically, the second connection terminal 221 is disposed on the second bus metal sheet 222.

[0082] To further explain, one end of a plurality of second contact springs 223 is located at the edge of the second busbar metal sheet 222, and the other end of the plurality of second contact springs 223 extends away from the second busbar metal sheet 222.

[0083] In this embodiment, the second busbar metal sheet 222 can collect the second state parameters of several battery packs 11 on the second side; the second connection terminal 221 cooperates with another corresponding connector 301 on the BMS board 3 to transmit the second state parameters to the BMS board 3.

[0084] It should be noted that the first state parameter and the second state parameter together form the state parameters.

[0085] In summary, the battery pack provided by this utility model embodiment can achieve an orderly wireless connection of the battery pack. Compared with traditional battery packs, this battery pack not only has the advantage of simple assembly, but also prevents damage to the motherboard chips by requiring a specific connection sequence when the BMS board outputs to the motherboard. This connection sequence is as follows: the main negative terminal of the motherboard first contacts the main negative terminal of the BMS board. After the elastic connector at the main negative terminal is compressed, the main negative terminals of the motherboard and the BMS board are fully connected. Then, the signal and main positive terminals between the motherboard and the BMS board are connected. Furthermore, this battery pack uses sampling components instead of the sampling harness of traditional battery packs, and uses male and female signal connectors instead of signal lines. This simplifies the connection process between the battery module and the BMS board, simplifies the assembly process between the BMS board and the motherboard, improves the reliability and safety of the battery pack, reduces its size, and effectively reduces its overall cost. Therefore, the battery pack provided by this utility model embodiment has a certain novelty compared to traditional battery packs.

[0086] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and all of these fall within the protection scope of the present invention.

Claims

1. A battery pack, characterized by, The battery pack comprises: a battery module; a plurality of battery groups arranged in order to form the battery module; a sampling component; the sampling component is fixedly installed on opposite sides of the battery module to collect state parameters of the battery module; a BMS board; the BMS board is in communication with the sampling component so that the state parameters are transmitted to the BMS board; the BMS board is provided with a total negative elastic connecting piece, a total negative locking terminal, a total positive locking terminal, and a signal end female seat; a main board; the main board is provided with a total negative pad, a total negative screw hole, a total positive screw hole, and a signal end male head; the total negative elastic connecting piece abuts against the total negative pad; when the total negative locking terminal is fixed to the total negative screw hole, the total negative elastic connecting piece is compressed; the total positive locking terminal is fixed to the total positive screw hole, and the signal end male head is inserted into the signal end female seat, so that the main board and the BMS board are communicatively connected.

2. The battery pack according to claim 1, wherein:

3. The battery pack of claim 1, wherein, the sampling component has two connecting terminals and a plurality of pairs of contact springs; each pair of the contact springs is connected to a corresponding battery group, so that the sampling component obtains the state parameters of each battery group; the BMS board has two connectors, and the two connectors are respectively adapted to the two connecting terminals, so that the BMS board and the sampling component are communicatively connected, and at this time the state parameters are transmitted to the BMS board.

4. The battery pack of claim 1, wherein, The state parameters at least include: the voltage parameter, the current parameter, and / or the temperature parameter of each battery group. Further comprising: a main board supporting component; 5. The battery pack of claim 4, wherein, a housing component; an insulation component; 6. The battery pack of claim 2, wherein the battery modules have first and second opposite sides. the main board supporting component comprises: a main board insulation sheet and a main board supporting frame; the main board supporting frame is fixed to the battery module, and the main board insulation sheet is arranged between the main board and the main board supporting frame.

7. The battery pack of claim 6, wherein, The battery group comprises: at least two battery cells; two poles of the battery cells are respectively located at the first side and the second side. The sampling component comprises: a first sampling board and a second sampling board; the first sampling board is arranged at the first side, and the second sampling board is arranged at the second side.

8. The battery pack according to claim 7, wherein:

9. The battery pack of claim 8, wherein, the two connecting terminals are respectively a first connecting terminal arranged on the first sampling board and a second connecting terminal arranged on the second sampling board; the plurality of pairs of contact springs are respectively a plurality of first contact springs arranged on the first sampling board and a plurality of second contact springs arranged on the second sampling board. The first sampling board comprises: The first connecting terminal is arranged on the first bus metal sheet. One end of each of the first contact springs is arranged at an edge position of the first bus metal sheet, and the other end of each of the first contact springs extends away from the first bus metal sheet. The first bus metal sheet can collect first state parameters of the plurality of battery groups on the first side; the first connecting terminal cooperates with a corresponding connector on the BMS board to transmit the first state parameters to the BMS board.

10. The battery pack of claim 9, wherein, The second sampling board comprises: The second connecting terminal is arranged on the second bus metal sheet. One end of each of the second contact springs is arranged at an edge position of the second bus metal sheet, and the other end of each of the second contact springs extends away from the second bus metal sheet. The second bus metal sheet can collect second state parameters of the plurality of battery groups on the second side; the second connecting terminal cooperates with another corresponding connector on the BMS board to transmit the second state parameters to the BMS board. The first state parameters and the second state parameters jointly form the state parameters.

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