Integrated lithium battery data acquisition device

Abstract

The utility model discloses an integrated lithium battery data acquisition device. The integrated lithium battery data acquisition device comprises an injection molding substrate, an acquisition sheet assembly and a wire harness assembly, an acquisition sheet fixing groove and a cable wiring groove are formed in the injection molding substrate; the wire harness assembly comprises a connector, a plurality of temperature probes, a plurality of voltage probes and a signal transmission cable. The acquisition piece assembly comprises a positive electrode output end acquisition piece, a negative electrode output end acquisition piece, a battery pack series acquisition piece and a plurality of battery cell series acquisition pieces. The probe is fixed more reliably and is not easy to fall off and shift; and the production quality problems of unreliable connection and the like caused by the fact that the probes need to be assembled one by one during assembly are eliminated in advance, the process steps during PACK assembly are reduced, the production efficiency and quality of products are improved, and the percent of pass of the products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, and in particular to an integrated lithium battery data acquisition device. Background Art

[0002] The lithium battery data acquisition module refers to a device that collects battery pack temperature and voltage indicators through sensor probes and transmits the signals to the BMS system, including temperature acquisition probes and voltage acquisition probes.

[0003] At present, the lithium battery data acquisition module is installed with the probe during PACK assembly, and there are two ways to install and fix it: the first is to apply thermal grease on the probe and then directly stick it to the surface of the battery cell with high-temperature tape, and the second is to place the thermal silicone in the storage hole on the surface of the battery cell and then insert the probe. The technical problems of the above installation methods are that they are prone to loosening and falling off, resulting in detachment from the battery cell and failure, which in turn affects the measurement accuracy, and the assembly process is complicated, reducing production efficiency. Summary of the invention

[0004] To solve the above technical problems, the utility model provides an integrated lithium battery data acquisition device. In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

[0005] The utility model adopts the following technical solutions:

[0006] Provided is an integrated lithium battery data acquisition device, comprising: an injection molded substrate, a collection piece assembly and a wiring harness assembly, wherein the injection molded substrate is provided with a collection piece fixing groove for accommodating the collection piece assembly and a cable routing groove for accommodating the wiring harness assembly;

[0007] The wiring harness assembly comprises: a connector, a plurality of temperature probes, a plurality of voltage probes, and signal transmission cables connected to the temperature probes and the voltage probes, wherein the ends of the signal transmission cables are gathered at the connector;

[0008] The acquisition sheet assembly includes: a positive output terminal acquisition sheet, a negative output terminal acquisition sheet, a battery pack series acquisition sheet and a plurality of battery cell series acquisition sheets, and the battery cell series acquisition sheet is provided with an electrode welding hole, a temperature probe crimping hole and a voltage probe crimping hole; the temperature probe is arranged in the temperature probe crimping hole, and the voltage probe is arranged in the voltage probe crimping hole.

[0009] Furthermore, the injection-molded substrate is a plate formed by open-mold injection molding according to the arrangement of the lithium battery PACK box, and the plate is composed of two plate units, and the two plate units are connected through the battery pack series collection sheet.

[0010] Furthermore, the material of the collection piece assembly is aluminum alloy.

[0011] Furthermore, the thicknesses of the positive output terminal collection sheet, the negative output terminal collection sheet, the battery pack series collection sheet, and the battery cell series collection sheet are consistent.

[0012] Furthermore, the battery cell series collection sheet is composed of two collection sheet units arranged in parallel, and the two collection sheet units are connected through the U-shaped compensation structure.

[0013] Furthermore, the acquisition sheet fixing groove is connected to the cable routing groove.

[0014] Beneficial effects brought by the utility model:

[0015] 1. The structural design of the present application makes the probe fixation more reliable, which not only ensures good contact between the probe and the electrode, thereby ensuring the accuracy of the battery cell measurement, but also ensures a stable connection and is not easy to fall off or shift;

[0016] 2. The structural design of the present application enables the integrated lithium battery data acquisition device to complete most of the assembly steps before the battery PACK is assembled, thereby eliminating in advance production quality problems such as unreliable connection caused by the need to assemble the probes one by one during assembly, and reducing the process steps during PACK assembly, thereby improving product production efficiency and quality, and improving product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a structural schematic diagram of an integrated lithium battery data acquisition device of the utility model;

[0019] Figure 2 It is a front structural schematic diagram of an integrated lithium battery data acquisition device of the utility model. DETAILED DESCRIPTION

[0020] The following is a detailed description of the embodiments of the utility model in conjunction with the accompanying drawings. It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1-2 As shown, in some illustrative embodiments, an integrated lithium battery data acquisition device is provided, including: an injection molded substrate 1, a collection sheet assembly 2 and a wiring harness assembly 3.

[0022] The material of the injection molded substrate 1 is plastic, and the selection of plastic can effectively isolate the wiring harness electromechanical core body, thereby effectively protecting the signal acquisition wiring harness. Specifically, the injection molded substrate 1 is a plate formed by mold opening and injection molding according to the arrangement of the lithium battery PACK box, and the injection molded substrate 1 directly opens the acquisition piece fixing groove 101 and the cable routing groove 102 during mold opening and injection molding, reserving installation space for the acquisition piece assembly 2 and the wiring harness assembly 3.

[0023] The wiring harness assembly 3 includes: a connector 301 , a plurality of temperature probes 302 , a plurality of voltage probes 303 and a signal transmission cable 304 .

[0024] The head end of the signal transmission cable 304 is connected to the temperature probe 302 and the voltage probe 303, and each probe is connected to the signal transmission cable 304 by pre-crimping or welding according to the different measurement point positions. The ends of the signal transmission cables 304 are gathered to the connector 301, that is, the connector 301 is connected to the BMS module as a bus bar of each signal transmission cable 304. The cable routing groove 102 is used to accommodate the signal transmission cables 304. During actual installation, the signal transmission cables 304 connected to each probe are arranged and fixed along the cable routing groove 102 reserved on the injection molding substrate 1.

[0025] The collection piece assembly 2 is used to connect the cells in series and transmit current, and specifically includes: a positive output terminal collection piece 201, a negative output terminal collection piece 202, a battery pack series collection piece 204, and a plurality of cell series collection pieces 203.

[0026] The material of the positive output terminal collection sheet 201, the negative output terminal collection sheet 202, the battery pack series collection sheet 204 and the battery cell series collection sheet 203 is aluminum alloy, and the thickness is consistent. The collection sheet assembly 2 made of aluminum alloy can ensure good electrical conductivity and good thermal conductivity, and is connected to the battery cell electrode by welding to ensure temperature conduction and ensure the accuracy of temperature measurement. The consistent thickness of each collection sheet can ensure the balance of current transmission.

[0027] The injection molded substrate 1 is provided with a collecting piece fixing groove 101 for accommodating the collecting piece assembly 2, that is, a fixing groove is reserved for each collecting piece. During actual installation, each collecting piece in the collecting piece assembly 2 can be fixed in the collecting piece fixing groove 101 according to the reserved position by the injection molded part buckle.

[0028] The battery cell series collection sheet 203 is provided with an electrode welding hole 2031, a temperature probe crimping hole 2032, and a voltage probe crimping hole 2033. The temperature probe 302 is arranged in the temperature probe crimping hole 2032, and the voltage probe 303 is arranged in the voltage probe crimping hole 2033. The collection sheet fixing groove 101 is connected with the cable routing groove 102, which is convenient for routing. During actual installation, the temperature probe 302 and the voltage probe 303 are fixed one by one on the battery cell series collection sheet 203 according to the signal collection requirements. The fixing form is laser welding after crimping, and finally coated with thermal conductive silicone.

[0029] The injection molding substrate 1 is composed of two plate units 11 , and the two plate units 11 are connected in series through a battery pack series collection sheet 204 .

[0030] The battery cell series collection sheet 203 is composed of two collection sheet units 2034 arranged in parallel, and the collection sheet units 2034 are connected by a U-shaped compensation structure 2035. Specifically, the U-shaped compensation structure 2035 is a U-shaped structure punched out on the main body of the battery cell series collection sheet 203, and is a part of the battery cell series collection sheet 203, that is, the U-shaped compensation structure 2035 and the collection sheet unit 2034 are an integrally formed structure. The U-shaped compensation structure 2035 is used to compensate for thermal expansion and contraction caused by temperature changes.

[0031] In the prior art, safety accidents often occur because the heat inside the battery is difficult to diffuse to the outside. The collection sheet assembly 2 of the present application is made of aluminum alloy and is supported by an injection molded substrate 1. The present application is a low-resistivity battery output connector, which can improve the heat dissipation performance of the battery to a certain extent and improve safety.

[0032] The structure of the present application is reasonably arranged and has thermal conductivity, compatibility and stability to ensure normal power supply or communication of the system.

[0033] In the present application, the temperature probe 302 and the voltage probe 303 are reliably fixed on the battery cell series collection sheet 203. After crimping, laser welding and then coating with thermal conductive silicone can make the temperature probe 302 and the electrode contact better, measure the temperature of the battery cell more accurately, and solve a series of problems caused by sensor detachment and failure.

[0034] The present application is prefabricated before the battery PACK is assembled, thereby eliminating the problem of unreliable connection caused by assembly in advance, reducing the process steps during PACK assembly, reducing the assembly time of the product, avoiding the quality problems caused by assembling the probes one by one, improving the production efficiency of the product, improving the stability of product performance, ensuring the quality of the product, and improving the product qualification rate.

[0035] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An integrated lithium battery data acquisition device, characterized in that: include: An injection molding substrate, a collection sheet assembly and a wiring harness assembly, wherein the injection molding substrate is provided with a collection sheet fixing groove for accommodating the collection sheet assembly and a cable routing groove for accommodating the wiring harness assembly; The wiring harness assembly comprises: a connector, a plurality of temperature probes, a plurality of voltage probes, and signal transmission cables connected to the temperature probes and the voltage probes, wherein the ends of the signal transmission cables are gathered at the connector; The acquisition sheet assembly includes: a positive output terminal acquisition sheet, a negative output terminal acquisition sheet, a battery pack series acquisition sheet and a plurality of battery cell series acquisition sheets, and the battery cell series acquisition sheet is provided with an electrode welding hole, a temperature probe crimping hole and a voltage probe crimping hole; the temperature probe is arranged in the temperature probe crimping hole, and the voltage probe is arranged in the voltage probe crimping hole.

2. The integrated lithium battery data acquisition device according to claim 1, characterized in that: The injection-molded substrate is a plate formed by open-mold injection molding according to the arrangement of the lithium battery PACK box, and the plate is composed of two plate units, and the two plate units are connected through the battery pack series collection sheet.

3. The integrated lithium battery data acquisition device according to claim 1, characterized in that: The material of the collection piece assembly is aluminum alloy.

4. The integrated lithium battery data acquisition device according to claim 3, characterized in that: The thicknesses of the positive output terminal collection sheet, the negative output terminal collection sheet, the battery pack series collection sheet, and the battery cell series collection sheet are consistent.

5. The integrated lithium battery data acquisition device according to claim 4, characterized in that: The battery cell series collection sheet is composed of two collection sheet units arranged in parallel, and the two collection sheet units are connected by a U-shaped compensation structure.

6. The integrated lithium battery data acquisition device according to claim 5, characterized in that: The acquisition sheet fixing groove is communicated with the cable routing groove.

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