A battery collection component and battery module based on direct measurement of bow-shaped spring electrodes

Abstract

This invention discloses a battery acquisition component and battery module based on direct measurement using bow-shaped spring electrodes. The acquisition component includes: a substrate, on which a plurality of metal contacts are respectively provided on a first surface and a second surface opposite to the first surface; a data acquisition interface electrically connected to the metal contacts through the substrate; a plurality of bow-shaped voltage sampling springs in contact with the battery electrodes, each with supporting feet at both ends connected to the metal contacts; and an insulating bracket supporting a cylindrical battery string, respectively connected to the first and second surfaces of the substrate. The battery acquisition component and battery module based on direct measurement using bow-shaped spring electrodes of this invention can acquire the voltage and temperature of individual batteries, has a simple structure, and strong scalability.

Description

Technical Field

[0001] This invention relates to the field of battery technology, specifically to a battery acquisition component and battery module based on direct measurement using bow-shaped spring electrodes. Background Technology

[0002] In battery energy storage applications, due to the relatively low voltage and capacity of individual batteries, several batteries need to be connected in series to form an energy storage module for convenient system integration and battery management. To ensure timely acquisition of battery information within the energy storage module, appropriate sampling circuits for individual battery voltage and temperature need to be set up. The relevant data is then collected and analyzed by the battery management system to guide the subsequent operation strategy of the battery module.

[0003] Cylindrical battery modules are broadly classified into linear and matrix arrangements based on whether the cells are axially connected in series. Matrix arrangements offer higher energy density but suffer from poor heat dissipation, requiring additional cooling plate components for high-rate applications, making them more suitable for energy-intensive applications. In linear arrangements, both sides of the battery cells are exposed to air, resulting in better heat dissipation, and the connection method is suitable for operation under high current. However, existing linear battery modules require complex welding harnesses or numerous cables and connectors, leading to relatively complex sampling structures and poor scalability. For example, Chinese patent CN115032550A discloses a module voltage acquisition system and battery module that uses sampling terminals and wires for voltage sampling, resulting in complex harness structures and the need for welding. Summary of the Invention

[0004] To address the issues of complex single-cell voltage sampling structures and numerous wiring harnesses in linearly arranged cylindrical battery modules, this invention proposes a battery acquisition component and battery module based on direct measurement using bow-shaped spring electrodes. By elastically contacting the bow-shaped spring with the electrode and combining it with a substrate featuring double-sided integrated contacts, the voltage of a single battery cell can be acquired without the need for complex soldered wiring harnesses. The structure is simple and has good heat dissipation.

[0005] A further objective of this invention is to enhance the scalability of near-linearly arranged battery modules.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a battery acquisition component based on direct measurement of bow-shaped spring electrodes, comprising: a substrate, wherein a first surface and a second surface opposite to the first surface of the substrate are respectively provided with a plurality of metal contacts; a data acquisition interface, which is electrically connected to the metal contacts through the substrate; a plurality of bow-shaped voltage sampling springs in contact with the battery electrodes, each having a support foot at both ends and connected to the metal contacts; and an insulating bracket supporting a cylindrical battery string, which is respectively connected to the first surface and the second surface of the substrate.

[0007] In this technical solution, a bow-shaped spring is used to directly and elastically contact the positive and negative terminals of the battery, and voltage and temperature signals are acquired through metal contacts and a data interface on the substrate. By replacing the traditional soldered wire harness with direct contact spring contact, combined with a substrate with double-sided integrated contacts and an insulating support, the sampling structure is significantly simplified, eliminating a large number of cables and connectors, and reducing complexity and cost.

[0008] Preferably, it includes a temperature sensing chip electrically connected to a metal contact or a voltage sampling spring.

[0009] Preferably, the substrate is a strip plate with printed circuitry on it, connecting metal contacts and a data acquisition interface, wherein the data acquisition interface is located on the edge of the first surface of the substrate near a short side.

[0010] Preferably, the voltage sampling spring includes a contact portion and a connecting portion. When the contact portion is in contact with the electrode of the cylindrical battery, the surface away from the substrate is bent into a first arc surface convex to the substrate by axial translation of a minor arc-shaped arc. The contact portion has connecting portions extending toward the substrate on both sides perpendicular to the axial direction and parallel to the substrate direction. The connecting portions are connected to support feet. The support feet of the same voltage sampling spring are connected to the same metal contact.

[0011] Preferably, the insulating support is provided with a plurality of protrusions, and the voltage sampling spring is provided with a protrusion on each of its two sides parallel to the axial direction. The third surface of the protrusion away from the substrate is located on a cylindrical surface coaxial with the first arc surface. The third surface is in contact with the side of the cylindrical battery, and the center of the protrusion is recessed downward to form a groove.

[0012] The present invention also adopts the following technical solution: a battery module based on direct measurement of bow-shaped spring electrode, comprising several of the above-mentioned battery acquisition components based on direct measurement of bow-shaped spring electrode, including several acquisition components arranged at equal intervals to form an intermediate acquisition layer, and a layer of cylindrical battery strings formed by several cylindrical battery arrays distributed on the upper and lower sides of the intermediate layer, wherein the cylindrical battery strings are respectively connected to module cover plates at the top and bottom, and end face protection plates that are fixedly connected to the upper and lower module cover plates are provided at both ends of the module cover plates, and several insulating supports are arranged at equal intervals on the module cover plates.

[0013] In this technical solution, the modular substrate design supports flexible serial connection and plug-and-play functionality, greatly improving module expansion capabilities and ease of maintenance.

[0014] Preferably, the distance between two adjacent acquisition components is equal to the axial length of the cylindrical battery.

[0015] Preferably, it includes a heat dissipation protection plate and a data processing circuit board, wherein the data processing circuit board is provided with a signal interface and is connected to a data acquisition interface.

[0016] Preferably, the data processing circuit board includes an AFE front-end analog chip that records and converts unit voltage and temperature data from the data acquisition interface, and the signal interface is connected to a main control communication interface to transmit the data to the next-level control unit.

[0017] Preferably, the substrate of the acquisition component is provided with a plurality of connection holes, and a connector is provided in the connection holes, and the acquisition component is fixed by the connector.

[0018] The beneficial effects of this invention are:

[0019] 1) The connection process between the sampling point and the battery electrode is simplified, and combined with the printed circuit in the PCB, a cylindrical battery string sampling method without the use of wires is realized.

[0020] 2) The module structure can be repeated to form larger-scale energy storage modules, and has good scalability;

[0021] 3) By directly integrating the temperature sensing chip to the electrode voltage sampling point, the temperature measurement error caused by environmental heat loss and slow internal heat transfer, which is common with the shell temperature measurement method, is avoided.

[0022] 4) The battery pack is transmitted through the PCB printed circuit and voltage signal interface, avoiding the use of messy temperature measurement circuits and avoiding the problems of time-consuming assembly process and affecting air cooling heat dissipation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the acquisition component structure provided in an embodiment of the present invention.

[0024] Figure 2 This is a top view of the acquisition component provided in this embodiment of the invention.

[0025] Figure 3 yes Figure 2 In the cross-sectional view of AA.

[0026] Figure 4 This is a schematic diagram of the installation of the acquisition component and the cylindrical battery provided in the embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of the acquisition component substrate provided in an embodiment of the present invention.

[0028] Figure 6 This is an exploded view of the main components of the battery module provided in the embodiment of the present invention.

[0029] Figure 7 This is a schematic diagram of a battery module structure without a computing board provided in an embodiment of the present invention.

[0030] Figure 8 This is a schematic diagram of the computing board structure provided in an embodiment of the present invention.

[0031] Figure 9 This is a schematic diagram of a battery module structure including a computing board provided in an embodiment of the present invention.

[0032] Reference numerals: Acquisition component 10; substrate 101; insulating support 102; voltage sampling spring 103; temperature measuring chip 104; data acquisition interface 105; metal contact 106; cylindrical battery string 20; cylindrical battery 201; electrode 202; battery pack positive electrode 203; battery pack negative electrode 204; module cover 30; end face protection plate 40; computing board 50; heat dissipation protection plate 501; data processing circuit board 502; signal interface 503; fixing component 504; main control communication interface 505. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only one preferred embodiment of this invention and are only used to explain this invention. They do not limit the scope of protection of this invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0034] Example 1

[0035] This embodiment provides a battery acquisition component 10 based on direct measurement of bow-shaped reed electrodes. The main body of the acquisition component 10 includes a substrate 101, an insulating support 102, and a voltage sampling reed 103.

[0036] The substrate 101 is a PCB board, which is strip-shaped and includes a first surface and a second surface opposite to the first surface. The first surface and the second surface opposite to the first surface of the substrate 101 are respectively provided with a plurality of metal contacts 106.

[0037] The substrate 101 is provided with a printed circuit, which connects the metal contact 106 and the data acquisition interface 105. The data acquisition interface 105 is located on the edge of the first surface of the substrate 101 near a short side.

[0038] The voltage sampling spring 103 is arc-shaped, with the middle of the voltage sampling spring 103 in contact with the battery electrode. The two ends of the voltage sampling spring 103 are provided with support feet, which are in contact with the metal contacts 106 on the substrate 101. Each metal contact 106 is connected to a voltage sampling spring 103.

[0039] Specifically, the voltage sampling spring 103 is elastic. When the contact part is in contact with the electrode of the cylindrical battery, the surface away from the substrate is bent into a first arc surface convex to the substrate by axial translation of a minor arc-shaped arc. The contact part has connecting parts extending toward the substrate 101 on both sides perpendicular to the axial direction and parallel to the substrate 101. The connecting parts are connected to support feet. The support feet of the same voltage sampling spring 103 are connected to the same metal contact 106.

[0040] The substrate 101 is provided with a data acquisition interface 105, which is electrically connected to the metal contact 106 through the printed circuit of the substrate 101, so that the battery voltage connected to the sampling board can be directly obtained at the data acquisition interface 105.

[0041] An insulating bracket 102 supporting the cylindrical battery string 20 is connected to the first and second surfaces of the substrate 101 respectively, for supporting the cylindrical battery string 20 and providing a heat dissipation channel.

[0042] Specifically, the insulating support 102 is provided with several protrusions, and the voltage sampling spring 103 is provided with a protrusion on each of its two sides parallel to the axial direction. The third surface of the protrusion away from the substrate 101 is located on a cylindrical surface coaxial with the first arc surface. The third surface is in contact with the side of the cylindrical battery 201, and the middle part of the protrusion is recessed downward to form a groove.

[0043] In this technical solution, the PCB substrate 101 is combined with the insulating support 102 to design a support for the cylindrical battery string 20 and a voltage and temperature detection component. The use of the bow-shaped spring simplifies the connection process between the sampling point and the battery electrode, and combined with the printed circuitry within the PCB, enables a sampling method for the cylindrical battery string 20 without the use of wires.

[0044] Example 2

[0045] This embodiment provides a battery acquisition component 10 based on direct measurement using bow-shaped spring electrodes, such as... Figure 1-Figure 2 As shown, the main body of the acquisition component 10 includes a substrate 101, an insulating support 102, and a voltage sampling spring 103. Unlike Embodiment 1, in this embodiment, a temperature sensing chip 104 is also attached to the metal contact 106 of the substrate 101.

[0046] The substrate 101 is a PCB board, which is strip-shaped and includes a first surface and a second surface opposite to the first surface. The first surface and the second surface opposite to the first surface of the substrate 101 are respectively provided with a plurality of metal contacts 106, which are arranged linearly.

[0047] The substrate 101 is provided with a printed circuit, which connects the metal contact 106 and the data acquisition interface 105. The data acquisition interface 105 is located on the edge of the first surface of the substrate 101 near a short side.

[0048] The voltage sampling spring 103 is arc-shaped, with the middle of the voltage sampling spring 103 in contact with the battery electrode. The two ends of the voltage sampling spring 103 are provided with support feet, which are in contact with the metal contacts 106 on the substrate 101. Each metal contact 106 is connected to a voltage sampling spring 103.

[0049] Specifically, such as Figure 1 As shown, the voltage sampling spring 103 is elastic. When the contact portion is in contact with the electrode of the cylindrical battery, the surface away from the substrate bends into a first arc surface convex to the substrate, formed by axial translation of a minor arc-shaped curve. Connecting portions extend from both sides of the contact portion perpendicular to the axial direction and parallel to the substrate 101 towards the substrate 101. Support feet are connected to the connecting portions. Each metal contact 106 is connected to one voltage sampling spring 103, as shown... Figure 3 As shown, the metal contact can make contact with one of the support legs of the voltage sampling spring.

[0050] The substrate 101 is provided with a data acquisition interface 105, which is electrically connected to the metal contact 106 through the printed circuit of the substrate 101 to form an external sampling interface, so that the battery voltage connected to the sampling board can be directly obtained at the data acquisition interface 105.

[0051] In this embodiment, the metal contacts 106 are rounded rectangular contact blocks distributed on the surface of the substrate 101, such as... Figure 5 As shown, each metal contact is connected to the data acquisition interface through a printed circuit on the substrate. However, it should be understood that the size and shape of the metal contacts are not limited to the solution in this embodiment and can be adjusted according to the actual situation.

[0052] An insulating bracket 102 supporting the cylindrical battery string 20 is connected to the first and second surfaces of the substrate 101 respectively, for supporting the cylindrical battery string 20 and providing a heat dissipation channel.

[0053] Specifically, the insulating support 102 is a long rectangular plate with several rectangular through holes in the middle. The support foot of the voltage sampling spring is fixed between the insulating support and the substrate. The contact part passes through the rectangular through holes and is located on the side of the rectangular plate away from the substrate 101. The insulating support 102 is provided with several protrusions. The voltage sampling spring 103 is provided with a protrusion on each side parallel to the axial direction. A long strip groove is formed between the two protrusions to accommodate the contact part and the connecting part of the voltage sampling spring 103. The voltage sampling spring 103 is pressed and fixed on the substrate 101 to form a flexible sampling structure.

[0054] The third surface of the protrusion in the direction away from the substrate 101 is located on a cylindrical surface coaxial with the first arc surface, and the third surface is in contact with the side of the cylindrical battery 201.

[0055] In this embodiment, the protrusion is recessed downward in the middle to form a groove, which facilitates the removal and placement of the cylindrical battery 201.

[0056] In this technical solution, a PCB substrate 101 is combined with an insulating support to design a support and voltage / temperature detection component for the cylindrical battery string 20. The use of an arc-shaped spring simplifies the connection process between the sampling point and the battery electrodes, and combined with the printed circuitry within the PCB, enables a sampling method for the cylindrical battery string 20 without the use of wires.

[0057] When the acquisition component 10 is equipped with a battery, its structure is as follows: Figure 4 As shown, the edge of the cylindrical battery 201 rests on the insulating support 102, while the corresponding electrode 202 contacts the aforementioned flexible sampling structure, thus establishing the connection between the data acquisition interface 105 and the battery electrode.

[0058] In this embodiment, a temperature sensing chip 104 is also attached to the metal contact 106 of the substrate 101. The temperature sensing chip 104 is electrically connected to the metal contact 106. It uses the relatively good thermal conductivity of metal to indirectly measure the temperature of the battery electrode, convert it into an electrical signal, and transmit it to the data acquisition interface 105.

[0059] Specifically, for the locations where battery temperature needs to be measured, a temperature sensing chip 104, such as a PTO resistance temperature detector (RTD), is placed on its metal contact 106. The battery electrode temperature is indirectly measured through heat conduction via the battery electrodes, metal spring, and metal contact 106. The pins of the temperature sensing chip 104 are connected to the data acquisition interface 105 via printed circuitry, enabling unified interface acquisition of voltage and temperature.

[0060] This embodiment of a battery acquisition component 10 based on direct measurement of bow-shaped spring electrodes addresses the characteristic that the electrode temperature is highest during the operation and heating period of the cylindrical battery 201. By directly integrating the temperature measuring chip 104 to the electrode voltage sampling point, it avoids the temperature measurement error problem caused by environmental heat loss and slow internal heat transfer in the shell temperature measurement method.

[0061] Example 3

[0062] This embodiment provides a battery acquisition component 10 based on direct measurement using a bow-shaped reed electrode. The main body of the acquisition component 10 includes a substrate 101, an insulating support 102, and a voltage sampling reed 103. Unlike embodiment 2, in this embodiment, the temperature measuring chip 104 is attached to the voltage sampling reed 103.

[0063] The substrate 101 is a PCB board, which is strip-shaped and includes a first surface and a second surface opposite to the first surface. The first surface and the second surface opposite to the first surface of the substrate 101 are respectively provided with a plurality of metal contacts 106. The plurality of metal contacts 106 are covered on the surface of the substrate 101 in a block shape and are linearly arranged.

[0064] The substrate 101 is provided with a printed circuit, which connects the metal contact 106 and the data acquisition interface 105. The data acquisition interface 105 is located on the edge of the first surface of the substrate 101 near a short side.

[0065] The voltage sampling spring 103 is arc-shaped, with the middle of the voltage sampling spring 103 in contact with the battery electrode. The two ends of the voltage sampling spring 103 are provided with support feet, which are in contact with the metal contacts 106 on the substrate 101. Each metal contact 106 is connected to a voltage sampling spring 103.

[0066] Specifically, the voltage sampling spring 103 is elastic. When the contact part is in contact with the electrode of the cylindrical battery, the surface away from the substrate is bent into a first arc surface convex to the substrate by axial translation of a minor arc-shaped arc. The contact part has connecting parts extending toward the substrate 101 on both sides perpendicular to the axial direction and parallel to the substrate 101. The connecting parts are connected to support feet. The support feet of the same voltage sampling spring 103 are connected to the same metal contact 106.

[0067] The substrate 101 is provided with a data acquisition interface 105, which is electrically connected to the metal contact 106 through the printed circuit of the substrate 101 to form an external sampling interface, so that the battery voltage connected to the sampling board can be directly obtained at the data acquisition interface 105.

[0068] An insulating bracket 102 supporting the cylindrical battery string 20 is connected to the first and second surfaces of the substrate 101 respectively, for supporting the cylindrical battery string 20 and providing a heat dissipation channel.

[0069] Specifically, the insulating support 102 is provided with several protrusions, and the voltage sampling spring 103 is provided with a protrusion on each side parallel to the axial direction. A long strip groove is formed between the two protrusions to accommodate the voltage sampling spring 103, and the voltage sampling spring 103 is pressed and fixed on the substrate 101 to form a flexible sampling structure.

[0070] The third surface of the protrusion in the direction away from the substrate 101 is located on a cylindrical surface coaxial with the first arc surface, and the third surface is in contact with the side of the cylindrical battery 201.

[0071] In this embodiment, the protrusion is recessed downward in the middle to form a groove, which facilitates the removal and placement of the cylindrical battery 201.

[0072] In this technical solution, a PCB substrate 101 is combined with an insulating support to design a support and voltage / temperature detection component for the cylindrical battery string 20. The use of an arc-shaped spring simplifies the connection process between the sampling point and the battery electrodes, and combined with the printed circuitry within the PCB, enables a sampling method for the cylindrical battery string 20 without the use of wires.

[0073] In this embodiment, a temperature measuring chip 104 is also attached to the voltage sampling spring 103. The temperature measuring chip 104 is electrically connected to the voltage sampling spring 103. It uses the relatively good thermal conductivity of metal to indirectly measure the temperature of the battery electrode, convert it into an electrical signal, and transmit it to the data acquisition interface 105.

[0074] This embodiment of a battery acquisition component 10 based on direct measurement of bow-shaped spring electrodes addresses the characteristic that the electrode temperature is highest during the operation and heating period of the cylindrical battery 201. By directly integrating the temperature measuring chip 104 to the electrode voltage sampling point, it avoids the temperature measurement error problem caused by environmental heat loss and slow internal heat transfer in the shell temperature measurement method.

[0075] Example 4

[0076] This embodiment provides a battery module based on direct measurement using bow-shaped spring electrodes. Based on the aforementioned battery acquisition component 10 based on direct measurement using bow-shaped spring electrodes, a small battery module is integrated by longitudinally stacking the module cover plate 30, cylindrical battery string 20, acquisition component 10, cylindrical battery string 20, and module cover plate 30 in that order. This module is simple to integrate, highly reliable, and can be used in high-power battery applications such as energy saving in lifting equipment and grid frequency regulation. Its structure is as follows: Figure 6 As shown.

[0077] The acquisition component 10 is placed in the middle layer of the battery module. Several acquisition components 10 are arranged at equal intervals to form the middle acquisition layer, which can simultaneously measure the voltage and temperature data of the upper and lower layers and transmit them to the side data acquisition interface 105.

[0078] The upper and lower sides of the middle acquisition layer are respectively provided with a cylindrical battery string 20 formed by an array of several cylindrical batteries 201. The upper and lower sides of the cylindrical battery string 20 are respectively connected to the module cover plate 30.

[0079] The distance between two adjacent acquisition components 10 is equal to the axial length of the cylindrical battery 201, such as... Figure 4As shown, the cylindrical battery 201 includes a battery body and an electrode 202. The battery body is cylindrical, and the electrode 202 is disposed on one end face of the battery body. The end of the battery body closer to the electrode 202 is called the head end, and the end of the battery body away from the electrode 202 is called the tail end. Each cylindrical battery 201 in the cylindrical battery string 20 has an electrode 202 connected to a voltage sampling spring. The protruding part of the insulating bracket 102 on one side of the voltage sampling spring 103 supports the head end of the cylindrical battery body from the side, and the protruding part of the insulating bracket 102 on the other side of the voltage sampling spring 103 supports the tail end of the adjacent cylindrical battery body from the side.

[0080] After adding the end face protection plate 40 and other fixing components, the battery module is as follows: Figure 7 As shown. The module cover plate 30 has end face protection plates 40 at both ends that are fixedly connected to the upper and lower module cover plates 30. Several insulating brackets 102 are arranged at equal intervals on the module cover plate 30. Several connection holes are provided on the base plate 101 of the acquisition component 10. Connectors are provided in the connection holes. The acquisition component 10 is fixed by the connectors.

[0081] The battery module in this embodiment is simple to install and does not contain internal voltage and temperature sampling circuitry. By connecting the voltage and temperature sampling ports of the external battery management system to the data acquisition interface 105, basic battery management functions can be formed, significantly reducing the complexity of wiring connections.

[0082] Example 5

[0083] This embodiment provides a battery module based on direct measurement using bow-shaped spring electrodes. Based on the aforementioned battery acquisition component 10 based on direct measurement using bow-shaped spring electrodes, a small battery module is integrated by longitudinally stacking the module cover plate 30, cylindrical battery string 20, acquisition component 10, cylindrical battery string 20, and module cover plate 30 in that order. Its structure is as follows: Figure 6 As shown. Unlike Embodiment 4, the battery module in this embodiment also includes a computing board 50.

[0084] The acquisition component 10 is placed in the middle layer of the battery module. Several acquisition components 10 are arranged at equal intervals to form the middle acquisition layer, which can simultaneously measure the voltage and temperature data of the upper and lower layers and transmit them to the side data acquisition interface 105.

[0085] The upper and lower sides of the middle acquisition layer are respectively provided with a cylindrical battery string 20 formed by an array of several cylindrical batteries 201. The upper and lower sides of the cylindrical battery string 20 are respectively connected to the module cover plate 30.

[0086] The distance between two adjacent acquisition components 10 is equal to the axial length of the cylindrical battery 201, such as... Figure 4As shown, the cylindrical battery 201 includes a battery body and electrodes. The battery body is cylindrical, and the electrodes are disposed on one end face of the battery body. The end of the battery body closer to the electrodes is called the head end, and the end of the battery body farther from the electrodes is called the tail end. Each cylindrical battery 201 in the cylindrical battery string 20 is connected to a voltage sampling spring. The protruding part of the insulating bracket 102 on one side of the voltage sampling spring 103 supports the head end of the cylindrical battery body from the side, and the protruding part of the insulating bracket 102 on the other side of the voltage sampling spring 103 supports the tail end of the adjacent cylindrical battery body from the side.

[0087] After adding the end face protection plate 40 and other fixing components, the battery module is as follows: Figure 7 As shown. The module cover plate 30 has end face protection plates 40 at both ends that are fixedly connected to the upper and lower module cover plates 30. Several insulating brackets 102 are arranged at equal intervals on the module cover plate 30. Several connection holes are provided on the base plate 101 of the acquisition component 10. Connectors are provided in the connection holes. The acquisition component 10 is fixed by the connectors.

[0088] The battery module in this embodiment also includes a computing board 50, which connects to the data acquisition interface 105. Its structure is as follows: Figure 8 As shown, the main body of the computing board 50 includes a data processing circuit board 502, a heat dissipation protection board 501, a signal interface 503, and a main control communication interface 505.

[0089] The data processing circuit board 502 is equipped with an analog front-end (AFE) or digital-to-analog converter (ADC) chip for recording and converting individual voltage and temperature data from the data acquisition interface 105.

[0090] The data processing circuit board 502 is also provided with several signal interfaces 503 and a main control communication interface 505 connected to the signal interfaces 503. The signal interfaces 503 can receive data from the data acquisition interface 105. The data processing circuit board 502 is connected to the data acquisition interface 105 of the acquisition component 10 through the signal interfaces 503, performs battery operating parameter calculation and preprocessing nearby, and converts it into digital signals, which are then transmitted to the next level control device through the main control communication interface 505.

[0091] In this embodiment, the main control communication interface 505 uses a shielded RJ45 interface, and the shielding layer is connected to the heat dissipation protection plate 501 to improve the anti-interference capability of signal transmission.

[0092] The heat dissipation protection plate 501 is in contact with the computing board 50. In this embodiment, the heat dissipation protection plate 501 is made of metal and provides strength support and chip heat dissipation function. The heat dissipation plate is provided with a fixing member 504, and the heat dissipation plate is fixedly connected to the computing board 50 through the fixing member 504.

[0093] In addition, depending on specific needs, the computing board 50 can be equipped with online adjustment functions for battery balancing and voltage measurement circuits.

[0094] Adding a battery module with a computing board 50, such as Figure 9 As shown, the positive terminal 203 and negative terminal 204 of the battery pack are connected to the external power supply circuit, while the main control communication interface 505 is connected to the external communication circuit, thus realizing the charging, discharging, and status monitoring functions of the battery module. The related circuit is simple and reliable, easy to integrate and maintain, and can reduce the module BOM cost to a certain extent.

[0095] In this embodiment, the battery pack is transmitted through a PCB printed circuit along with the voltage signal interface 503, avoiding the use of messy temperature measurement lines and thus avoiding the problems of time-consuming assembly process and impact on air cooling.

[0096] The calculation board 50 works in conjunction with the sampling board. Its internal circuit board has an onboard signal interface 503 and a voltage sampling and calculation chip, which performs battery data preprocessing and calculation locally. The relevant data is directly converted into digital signals and transmitted to the upper-level control mechanism through the shielded main control communication interface 505, simplifying integration complexity and improving signal transmission stability and reliability.

[0097] In addition, the computing board 50 has expandable equalization and dynamic adjustment functions for the sampling line. At the same time, the interface design between the sampling board and the computing board 50 allows for quick replacement and upgrade of related hardware, providing excellent flexibility.

[0098] The power-type cylindrical battery 201 module integrated based on the aforementioned acquisition component 10 proposed in this embodiment has a structure based on the sequential structure of module cover plate 30, battery string, acquisition component 10, battery string, and module cover plate 30. This structure is simple, with no internal wire connections, and provides good heat dissipation space, which is beneficial for improving the stability and reliability of sampling and equalization. Furthermore, the above structure can be repeated cyclically to form a larger-scale energy storage module, exhibiting good scalability.

Claims

1. A battery acquisition component based on direct measurement using bow-shaped spring electrodes, characterized in that, include: A substrate (101) has a first surface and a second surface opposite to the first surface respectively provided with a plurality of metal contacts (106); a data acquisition interface (105) is electrically connected to the metal contacts (106) through the substrate (101); a plurality of arc-shaped voltage sampling springs (103) in contact with electrodes (202), the middle of the voltage sampling springs (103) is in contact with the electrodes of the cylindrical battery, and the two ends of the voltage sampling springs (103) are provided with support feet that are in contact with the metal contacts (106) on the substrate (101); an insulating bracket (102) supporting the cylindrical battery string is connected to the first surface and the second surface of the substrate (101) respectively, for supporting the cylindrical battery string (20) and providing a heat dissipation channel; the insulating bracket (102) is a long strip rectangular plate with a plurality of rectangular through holes in the middle, and the support feet of the voltage sampling springs are fixed between the insulating bracket and the substrate to form a flexible sampling structure.

2. The battery acquisition assembly based on direct measurement using a bow-shaped spring electrode according to claim 1, characterized in that, It includes a temperature sensing chip (104) electrically connected to a metal contact (106) or a voltage sampling spring (103).

3. A battery acquisition assembly based on direct measurement using a bow-shaped spring electrode according to claim 1 or 2, characterized in that, The substrate (101) is a strip plate with printed circuits on it, connecting metal contacts (106) and data acquisition interface (105). The data acquisition interface (105) is located on the edge of the first surface of the substrate (101) near a short side.

4. A battery acquisition assembly based on direct measurement using a bow-shaped spring electrode according to claim 1 or 2, characterized in that, The voltage sampling spring (103) includes a contact portion. When the contact portion is in contact with the electrode of the cylindrical battery, the surface away from the substrate (101) is bent into a first arc surface convex to the substrate (101) by axial translation of a minor arc-shaped arc. The contact portion has connecting portions extending toward the substrate (101) on both sides perpendicular to the axial direction parallel to the substrate (101). The connecting portions are connected to support feet. Each voltage sampling spring (103) is connected to a metal contact (106) through the support feet.

5. A battery acquisition assembly based on direct measurement using a bow-shaped spring electrode according to claim 4, characterized in that, The insulating bracket (102) is provided with a through hole for fixing the voltage sampling spring. The voltage sampling spring (103) has a protrusion on each side parallel to the axial direction. The third surface of the protrusion away from the substrate (101) is located on a cylindrical surface coaxial with the first arc surface. The third surface is in contact with the side of the cylindrical battery (201). The protrusion is recessed downward to form a groove.

6. A battery module based on direct measurement using arc-shaped spring electrodes, comprising a battery acquisition component based on direct measurement using arc-shaped spring electrodes as described in any one of claims 1-5, characterized in that, A number of acquisition components (10) are arranged at equal intervals to form an intermediate acquisition layer. On the upper and lower sides, there is a cylindrical battery string (20) formed by an array of cylindrical batteries (201). The cylindrical battery string is connected to a module cover plate (30) at the top and bottom. The two ends of the module cover plate are provided with end face protection plates (40) that are fixedly connected to the upper and lower module cover plates. A number of insulating supports (102) are arranged at equal intervals on the module cover plate.

7. A battery module based on direct measurement of bow-shaped spring electrodes according to claim 6, characterized in that, The distance between two adjacent acquisition components (10) is equal to the axial length of the cylindrical battery (201).

8. A battery module based on direct measurement of bow-shaped spring electrodes according to claim 6, characterized in that, The computing board (50) includes a heat dissipation protection plate (501) and a data processing circuit board (502). The data processing circuit board is provided with a signal interface (503) that is connected to a data acquisition interface (105).

9. A battery module based on direct measurement of bow-shaped spring electrodes according to claim 8, characterized in that, The data processing circuit board (502) includes an integrated chip that records and converts unit voltage and temperature data from the data acquisition interface. The signal interface (503) is connected to the main control communication interface (505) to transmit the data to the next-level control unit.

10. A battery module based on direct measurement using a bow-shaped spring electrode according to any one of claims 6-9, characterized in that, The base plate (101) of the acquisition component is provided with several connection holes, and connectors are provided in the connection holes. The acquisition component is fixed by the connectors.

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