Consistency detection device for lithium iron phosphate battery pack

Abstract

The invention relates to the technical field of battery testing, in particular to a consistency detection device of a lithium iron phosphate battery pack, which comprises a base as a bearing main body of the detection device; the mounting frame is fixedly arranged on the base; the plurality of partition plates are fixedly mounted on the bottom plate of the mounting frame, and every two adjacent partition plates form a group; and the sliding clamping plate is installed on the bottom plate of the installation frame in a sliding mode, a plurality of sets of clamping plates are arranged on the sliding clamping plate, and each set of clamping plates corresponds to one set of partition plates. A plurality of groups of lithium iron phosphate batteries clamped on the sliding clamping plate are moved, the lithium iron phosphate batteries are linked with the trigger plate, and then the trigger plate is matched with the metal curved bar, so that the positive and negative contact plates can be automatically contacted with the lithium iron phosphate batteries; and finally, the internal resistance consistency detection of the multiple groups of lithium iron phosphate batteries can be completed by connecting the contact blocks with an external internal resistance measurer.

Description

Technical Field

[0001] The present invention relates to the technical field of battery testing, and in particular to a consistency detection device for a lithium iron phosphate battery pack. Background Art

[0002] Lithium iron phosphate is a lithium-ion battery electrode material with the chemical formula LiFePO4. It is mainly used in various lithium-ion batteries. As a stable positive electrode material, it has high safety, long cycle life and good temperature performance. The battery pack is composed of multiple single cells. The performance parameters of each battery may vary due to factors such as manufacturing process and usage conditions.

[0003] After searching, the patent with authorization publication number CN109298350B discloses a battery consistency detection device, including: a battery module, an adjustable load, a communication algorithm module and a power module; the battery module includes N+1 single cells and a first 2N-pole three-throw switch, N is an integer greater than or equal to 0; the first 2N-pole three-throw switch includes 2N first static contacts, 2N first single-cell terminals, 2N first series terminals and 2N first parallel terminals.

[0004] The detection device of the above patent accurately collects the data of each single cell in the battery module through the communication algorithm module, and uses the 2N knife triple throw switch to flexibly adjust the connection relationship between the single cells. Through these operations, the device can realize the series test of the entire battery group, and detect the consistency of key parameters such as the battery charging and discharging state, battery internal resistance and sampling point temperature by adjusting the load increase and decrease of the battery group. However, although this method can perform simple battery pack consistency testing, it still has certain limitations. The current test items are relatively simple and insufficient to fully evaluate the performance of the battery pack. Therefore, in practical applications, the detection results of this method may not be accurate enough to meet the needs of high-precision detection. Summary of the invention

[0005] In order to overcome the shortcomings of the existing detection device that the detection mechanism is single and is not suitable for comprehensive consistency detection of battery packs, a consistency detection device for lithium iron phosphate battery packs with relatively comprehensive detection is provided.

[0006] A consistency detection device for a lithium iron phosphate battery pack comprises: a base, which serves as a bearing body of the detection device; a mounting frame, which is fixedly arranged on the base; a plurality of partition plates, which are provided and fixedly installed on the bottom plate of the mounting frame, and each two adjacent partition plates form a group; a sliding clamp plate, which is slidably installed on the bottom plate of the mounting frame, wherein the sliding clamp plate is provided with a plurality of groups of clamp plates, and each group of the clamp plates corresponds to a group of the partition plates, and the sliding clamp plate can clamp and place a plurality of groups of lithium iron phosphate batteries; an electric push rod, which is installed on the bottom plate of the mounting frame, and the electric push rod is connected to the sliding clamp plate through a telescopic rod; a trigger plate, which passes through and is slidably arranged on the rear of the mounting frame On the side wall, the trigger plates are provided with multiple and respectively correspond to each group of clamps on the sliding clamp; the internal resistance detection component is arranged on the rear side of the installation frame, and the internal resistance detection component includes: a rotating shaft, a metal curved rod, positive and negative contact plates, a connecting contact block and a torsion spring. The metal curved rods are provided with multiple groups and are rotatably installed on the upper part of the rear side wall of the installation frame through the rotating shaft. Each of the trigger plates corresponds to and contacts each group of the metal curved rods, the positive and negative contact plates are arranged at the upper end of each group of the metal curved rods, the connecting contact blocks are all arranged at the lower end of the metal curved rods, and the torsion spring is installed on the rotating shaft; the temperature measurement component is arranged on the installation frame and is used to measure the temperature of the lithium iron phosphate battery.

[0007] Furthermore, the positive and negative contact plates are detachably mounted on the metal curved rod, so that the positive and negative contact plates can be replaced with different sizes to meet the needs of lithium iron phosphate batteries of different specifications during disassembly and maintenance.

[0008] Furthermore, the metal curved rod is designed in an L-shape, and the metal curved rod forms a lever structure with the rotating shaft as the axis. The rotating shaft is made of insulating material, and the connecting contact block can be externally connected to an internal resistance meter, and after the positive and negative contact plates contact the positive and negative electrodes of the lithium iron phosphate battery, the internal resistance and other parameters of the lithium iron phosphate battery are measured by the internal resistance meter.

[0009] Furthermore, the temperature measuring component includes: a mounting rod, mounted on the upper left and right side walls of the mounting frame; a connecting main frame, slidably mounted on the top rear side of the mounting frame through the mounting rod; a plurality of temperature measuring support plates, which are respectively fixed to the connecting main frame; a thermometer, which is mounted on each group of the temperature measuring support plates, and the thermometer is attached to the side of the lithium iron phosphate battery when working; a temperature display screen, which is arranged on each group of the temperature measuring support plates, and the thermometer is electrically connected to the temperature display screen.

[0010] Furthermore, a discharge detection component is also included, and the discharge detection component includes: a positive contact frame, which is installed on multiple groups of the temperature measuring support plates through a bracket, and a plurality of positive contacts are arranged on the positive contact frame; a negative contact frame, which is installed on the left and right outer walls of the installation frame, and a plurality of negative contacts are arranged on the negative contact frame, and each of the positive contacts and each of the negative contacts correspond to and adapt to each other; a battery discharger, which is installed on the base near the left side wall of the installation frame and is used to detect key parameters such as the capacity of the battery and the consistency of the discharge characteristics; two discharge lines are provided, and one of them is connected between the battery discharger and the positive contact frame, and the other is connected between the battery discharger and the negative contact frame.

[0011] Furthermore, a charging component is provided on the base, and the charging component includes: a charging box, installed on the base near the left side wall of the installation frame; a transformer, installed on the left outer wall of the installation frame, and the charging box is electrically connected to the transformer; two charging lines are provided, one of which is connected between the transformer and the positive contact frame, and the other is connected between the transformer and the negative contact frame.

[0012] Furthermore, the installation frame is made of insulating material, and the installation frame cannot conduct electricity when the lithium iron phosphate battery is charged or discharged, thereby preventing the installation frame from generating static electricity and increasing the risk of safety hazards.

[0013] Furthermore, a clamping member is provided on the sliding clamp, and the clamping member includes a clamping plate, a guide rod and a spring. The clamping plate is symmetrically slidably installed between the two side plates of each group of sliding clamps through the guide rod, and the spring is sleeved on the guide rod and located between the clamping plate and the sliding clamp.

[0014] Furthermore, the upper end of the clamping plate is an upwardly curved inclined surface, and a rubber elastic pad is provided on the surface of the clamping plate, so that the clamping plate can stably and safely clamp the lithium iron phosphate battery for various consistency tests.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The present invention moves multiple groups of lithium iron phosphate batteries clamped on a sliding clamp, and uses the lithium iron phosphate battery to link a trigger plate, and then uses the trigger plate to cooperate with a metal curved rod to make the positive and negative contact plates automatically contact the lithium iron phosphate battery. Finally, the internal resistance of the multiple groups of lithium iron phosphate batteries can be tested for consistency by connecting the contact blocks to an external internal resistance meter.

[0016] 2. The present invention can respectively connect the positive contact frame and the negative contact frame to the lithium iron phosphate battery, use the charging box to charge the lithium iron phosphate battery, and after the battery discharger is connected to the lithium iron phosphate battery, the battery discharger can detect the consistency of parameters such as battery cycle life, charge and discharge efficiency, and periodic discharge, and at the same time, a temperature measuring component is set to detect the consistency of temperature during charging and discharging of the lithium iron phosphate battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a schematic diagram of the structure of the partition plate, sliding clamp plate and trigger plate of the present invention.

[0019] Figure 3 It is a structural schematic diagram of specific components of the internal resistance detection assembly of the present invention.

[0020] Figure 4 It is a structural schematic diagram of specific components of the temperature measurement assembly of the present invention.

[0021] Figure 5 It is a structural schematic diagram of the mounting rod, connecting main frame, temperature measuring support plate and temperature measuring device of the present invention.

[0022] Figure 6 This is a connection diagram of the temperature measurement component and the discharge detection component of the present invention.

[0023] Figure 7 It is a schematic diagram of the structure of the discharge detection component and the charging component of the present invention.

[0024] Figure 8 It is a schematic structural diagram of the sliding clamping plate and the clamping plate of the present invention.

[0025] Fig. 9 It is a schematic structural diagram of specific components of the clamping piece of the present invention.

[0026] In the above figures: 1: base, 100: lithium iron phosphate battery, 2: mounting frame, 3: partition plate, 4: sliding splint, 5: electric push rod, 6: trigger plate, 7: internal resistance detection component, 701: rotating shaft, 702: metal curved rod, 703: positive and negative contact plates, 704: connecting contact block, 705: torsion spring, 8: temperature measurement component, 801: mounting rod, 802: connecting main frame, 803: temperature measurement support plate, 804: temperature meter, 805: temperature display screen, 9: discharge detection component, 901: positive contact frame, 902: negative contact frame, 903: battery discharger, 904: discharge line, 10: charging component, 101: charging box, 102: transformer, 103: charging line, 11: clamping piece, 111: clamping plate, 112: guide rod, 113: spring. DETAILED DESCRIPTION

[0027] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0028] Embodiment 1: A consistency detection device for a lithium iron phosphate battery pack, such as Figure 1-Figure 4 As shown, it includes: a base 1, which serves as the bearing body of the detection device; a mounting frame 2, which is fixedly arranged on the base 1; a partition plate 3, which is provided with multiple pieces and fixedly installed on the bottom plate of the mounting frame 2, and each adjacent two partition plates 3 form a group; a sliding clamp plate 4, which is slidably installed on the bottom plate of the mounting frame 2, and multiple groups of clamp plates are provided on the sliding clamp plate 4, and each group of the clamp plates corresponds to a group of the partition plates 3, and the sliding clamp plate 4 can clamp and place multiple groups of lithium iron phosphate batteries 100; an electric push rod 5, which is installed on the bottom plate of the mounting frame 2, and the electric push rod 5 is connected to the sliding clamp plate 4 through a telescopic rod; a trigger plate 6, which is penetrated and slidably arranged on the rear side wall of the mounting frame 2, and the trigger plate 6 is provided with multiple and respectively corresponds to each group of clamp plates on the sliding clamp plate 4 Plate; an internal resistance detection component 7, which is arranged on the rear side of the installation frame 2, and the internal resistance detection component 7 includes: a rotating shaft 701, a metal curved rod 702, a positive and negative contact plate 703, a connecting contact block 704 and a torsion spring 705. The metal curved rod 702 is provided with multiple groups and is rotatably installed on the upper part of the rear side wall of the installation frame 2 through the rotating shaft 701. The rear end of each of the trigger plates 6 corresponds to and contacts the lower end of each group of the metal curved rods 702, the positive and negative contact plates 703 are arranged at the upper end of each group of the metal curved rods 702, the connecting contact blocks 704 are all arranged at the lower end of the metal curved rods 702, and the torsion spring 705 is installed on the rotating shaft 701 and the installation frame 2; a temperature measurement component 8, which is arranged on the installation frame 2 and is used to measure the temperature of the lithium iron phosphate battery 100.

[0029] like Figure 2 and Figure 3 As shown, the positive and negative contact plates 703 are detachably mounted on the metal curved rod 702, so that the positive and negative contact plates 703 can be replaced with different sizes to meet the needs of lithium iron phosphate batteries 100 of different specifications during disassembly and maintenance; the mounting frame 2 is made of insulating material, and the mounting frame 2 cannot conduct electricity when the lithium iron phosphate battery 100 is charged and discharged, thereby avoiding the generation of static electricity in the mounting frame 2 and increasing the risk of safety hazards.

[0030] like Figure 3As shown, the metal curved rod 702 is of L-shaped design, and the metal curved rod 702 forms a lever structure with the rotating shaft 701 as the axis. The rotating shaft 701 is made of insulating material, and the connecting contact block 704 can be externally connected to an internal resistance meter, and after the positive and negative contact plates 703 contact the positive and negative electrodes of the lithium iron phosphate battery 100, the internal resistance and other parameters of the lithium iron phosphate battery 100 are measured by the internal resistance meter.

[0031] like Figure 1 , Figure 4 and Figure 5 As shown, the temperature measuring component 8 includes: a mounting rod 801, mounted on the upper left and right side walls of the mounting frame 2; a connecting main frame 802, slidably mounted on the top of the rear side of the mounting frame 2 through the mounting rod 801; a plurality of temperature measuring support plates 803, which are provided and respectively fixed to the connecting main frame 802; a thermometer 804, which is installed on each group of the temperature measuring support plates 803, and the thermometer 804 is attached to the side of the lithium iron phosphate battery 100 when working; a temperature display screen 805, which is provided on each group of the temperature measuring support plates 803, and the thermometer 804 is electrically connected to the temperature display screen 805, and the temperature display screen 805 can display the temperature of the surface of the lithium iron phosphate battery 100 measured by the thermometer 804 in real time.

[0032] When using the present device to detect the consistency parameters of a group of lithium iron phosphate batteries 100, the inspector can first disassemble the group of lithium iron phosphate batteries 100 into multiple groups of single test batteries, and then insert the lithium iron phosphate batteries 100 into the clamping plates of each group of sliding clamping plates 4 in turn, and then drive the sliding clamping plates 4 to move by the electric push rod 5, so that the lithium iron phosphate batteries 100 on the sliding clamping plates 4 can move toward the inside of the installation frame 2. When the multiple groups of lithium iron phosphate batteries 100 move inward synchronously and squeeze on each group of corresponding trigger plates 6, the compressed multiple groups of trigger plates 6 will move backward and squeeze on the lower end of the metal bent rod 702. The squeezed metal bent rod 702 will rotate with the rotating shaft 701 as the center and overcome the elastic force of the torsion spring 705. At this time, the positive and negative touch plates 703 at the upper ends of the multiple groups of metal bent rods 702 It will rotate and contact the positive and negative electrodes of the corresponding lithium iron phosphate battery 100. At this time, the inspector takes out the internal resistance meter and connects it to each connection contact block 704. At this time, the internal resistance meter is electrically connected to the lithium iron phosphate battery 100 through the positive and negative contact plates 703, and the consistency of the internal resistance parameters of this group of lithium iron phosphate batteries 100 can be synchronously measured. When measuring the consistency, the main frame 802 is connected by sliding. The main frame 802 will drive the multiple groups of temperature measuring support plates 803 thereon to move to the right synchronously until the temperature meter 804 on the temperature measuring support plate 803 is respectively attached to the side wall of each group of corresponding lithium iron phosphate batteries 100, and the measured temperature information is transmitted to the temperature display screen 805 for display. At this time, it is measured whether the temperature of this group of lithium iron phosphate batteries 100 is consistent during the inspection.

[0033] Embodiment 2: Based on embodiment 1, Figure 1 , Figure 6 and Figure 7 As shown, it also includes a discharge detection component 9, which includes: a positive contact frame 901, which is installed on multiple groups of the temperature measuring support plates 803 through a bracket, and a plurality of positive contacts are arranged on the positive contact frame 901; a negative contact frame 902, which is installed on the left and right outer walls of the installation frame 2, and a plurality of negative contacts are arranged on the negative contact frame 902, and each of the positive contacts and each of the negative contacts correspond to and adapt to each other; a battery discharger 903, which is installed on the base 1 near the left side wall of the installation frame 2, and is used to detect key parameters such as the capacity of the battery and the consistency of the discharge characteristics; two discharge lines 904 are provided, one of which is connected between the battery discharger 903 and the positive contact frame 901, and the other is connected between the battery discharger 903 and the negative contact frame 902.

[0034] like Figure 1 and Figure 7 As shown, a charging component 10 is provided on the base 1, and the charging component 10 includes: a charging box 101, installed on the base 1 near the left side wall of the installation frame 2; a transformer 102, installed on the left outer wall of the installation frame 2, and the charging box 101 is electrically connected to the transformer 102; two charging lines 103 are provided, one of which is connected between the transformer 102 and the positive contact frame 901, and the other is connected between the transformer 102 and the negative contact frame 902. The charging box 101 transmits electricity and is transformed by the transformer 102 and then input into the positive contact frame 901 and the negative contact frame 902, and multiple groups of lithium iron phosphate batteries 100 are charged synchronously.

[0035] like Figure 1 , Figure 8 and Fig. 9 As shown, a clamping member 11 is provided on the sliding clamp 4, and the clamping member 11 includes a clamping plate 111, a guide rod 112 and a spring 113. The clamping plate 111 is symmetrically slidably installed between the two side plates of each group of the sliding clamp 4 through the guide rod 112, and the spring 113 is sleeved on the guide rod 112 and located between the clamping plate 111 and the sliding clamp 4; the upper end portion of the clamping plate 111 is an upwardly curved arc-shaped inclined surface, and the surface of the clamping plate 111 is provided with a rubber elastic pad, so that the clamping plate 111 can stably and safely clamp the lithium iron phosphate battery 100 for various consistency tests.

[0036] When multiple lithium iron phosphate batteries 100 are inserted into the sliding clamping plate 4, the inserted lithium iron phosphate batteries 100 will be pressed downward on the clamping plate 111, and the clamping plate 111 will expand in the direction away from the sliding clamping plate 4 under the guidance of the guide rod 112 to overcome the elastic force of the spring 113, and the lithium iron phosphate batteries 100 inserted into the sliding clamping plate 4 will be further clamped and limited by the clamping plate 111. When multiple groups of lithium iron phosphate batteries 100 are clamped on the sliding clamping plate 4 and driven by the electric push rod 5, the consistency test of the internal resistance is completed. After the test, the electric push rod 5 drives the multiple groups of lithium iron phosphate batteries 100 on the sliding clamping plate 4 to move forward a certain distance until the negative electrodes on the multiple groups of lithium iron phosphate batteries 100 all contact the negative electrode contacts on the corresponding negative electrode contact frame 902. At this time, the main frame 802 is connected by sliding, and the main frame 802 is connected to synchronously drive the corresponding positive electrode contact frame 901 to slide through the multiple groups of temperature measurement support plates 803 until each group of positive electrode contact frames 901 slides and contacts the positive electrode contacts on the multiple groups of corresponding lithium iron phosphate batteries 100. At this time, the lithium iron phosphate battery 100 is connected through the positive contact frame 901 and the negative contact frame 902, and the battery discharger 903 is activated. The lithium iron phosphate battery 100 will discharge to the battery discharger 903 through the discharge line 904. Therefore, the consistency of parameters such as the capacity and discharge rate of this group of lithium iron phosphate batteries 100 can be known through the battery discharger 903. After completing the discharge detection of the lithium iron phosphate battery 100, the battery discharger 903 is first turned off and the charging box 101 is activated. The charging box 101 inputs current into the transformer 102 for charging and voltage transformation. The transformed current then flows into the positive contact frame 901 and the negative contact frame 902 respectively through the charging line 103. Finally, the charging of multiple groups of lithium iron phosphate batteries 100 is completed through the charging box 101. Therefore, by repeatedly opening and closing the charging box 101 and the battery discharger 903, the battery discharger 903 can test the consistency of parameters such as the cycle life, charge and discharge efficiency and periodic discharge of this group of batteries.

[0037] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A consistency detection device for a lithium iron phosphate battery pack, comprising: a base (1) as a bearing body of the detection device; a mounting frame (2) fixedly mounted on the base (1); a plurality of partition plates (3) provided and fixedly mounted on the bottom plate of the mounting frame (2), and each two adjacent partition plates (3) form a group; a sliding clamp (4) slidably mounted on the bottom plate of the mounting frame (2), a plurality of groups of clamps being provided on the sliding clamp (4), and each group of the clamps corresponding to a group of the partition plates (3), and the sliding clamp (4) can clamp and place a plurality of groups of lithium iron phosphate batteries (100); an electric push rod (5) mounted on the bottom plate of the mounting frame (2), and the electric push rod (5) is connected to the sliding clamp (4) through a telescopic rod; wherein ... include: A trigger plate (6) is provided on the rear side wall of the installation frame (2) and is slidably disposed thereon. The trigger plate (6) is provided with a plurality of plates and corresponds to each group of plates on the sliding plate (4). An internal resistance detection component (7) is provided on the rear side of the installation frame (2). The internal resistance detection component (7) comprises: a rotating shaft (701), a metal curved rod (702), positive and negative contact plates (703), a connecting contact block (704) and a torsion spring (705). The metal curved rod (702) is provided with a plurality of groups and is rotated by the rotating shaft (701). Installed on the upper part of the rear side wall of the installation frame (2), each of the trigger plates (6) corresponds to and contacts each group of the metal curved rods (702), the positive and negative contact plates (703) are arranged at the upper end of each group of the metal curved rods (702), the connecting contact blocks (704) are all arranged at the lower end of the metal curved rods (702), and the torsion spring (705) is installed on the rotating shaft (701); a temperature measuring component (8) is arranged on the installation frame (2) and is used to measure the temperature of the lithium iron phosphate battery (100).

2. A consistency detection device for a lithium iron phosphate battery pack according to claim 1, characterized in that: The positive and negative contact plates (703) are detachably mounted on the metal curved rod (702).

3. A consistency detection device for a lithium iron phosphate battery pack according to claim 2, characterized in that: The metal curved rod (702) is of L-shaped design. The metal curved rod (702) forms a lever structure with the rotating shaft (701) as the axis. The rotating shaft (701) is made of insulating material. The connecting contact block (704) can be externally connected to an internal resistance measuring device.

4. A consistency detection device for a lithium iron phosphate battery pack according to claim 3, characterized in that: The temperature measuring assembly (8) comprises: a mounting rod (801) mounted on the upper part of the left and right side walls of the mounting frame (2); a connecting main frame (802) slidably mounted on the top of the rear side of the mounting frame (2) through the mounting rod (801); a plurality of temperature measuring support plates (803) provided and respectively fixed to the connecting main frame (802); a temperature measuring device (804) installed on each group of the temperature measuring support plates (803), wherein the temperature measuring device (804) is attached to the side of the lithium iron phosphate battery (100) when in operation; and a temperature display screen (805) provided on each group of the temperature measuring support plates (803), wherein the temperature measuring device (804) is electrically connected to the temperature display screen (805).

5. A consistency detection device for a lithium iron phosphate battery pack according to claim 4, characterized in that: The invention also comprises a discharge detection assembly (9), wherein the discharge detection assembly (9) comprises: a positive contact frame (901) mounted on a plurality of groups of the temperature measuring support plates (803) through a bracket, wherein the positive contact frame (901) is provided with a plurality of positive contacts; a negative contact frame (902) mounted on the left and right outer walls of the mounting frame (2), wherein the negative contact frame (902) is provided with a plurality of negative contacts, and each of the positive contacts and each of the negative contacts correspond to and fit each other; a battery discharge meter (903) mounted on the base (1) near the left side wall of the mounting frame (2), and used to detect key parameters such as the capacity of the battery and the consistency of the discharge characteristics; and two discharge lines (904), wherein one of the two discharge lines is connected between the battery discharge meter (903) and the positive contact frame (901), and the other is connected between the battery discharge meter (903) and the negative contact frame (902).

6. A consistency detection device for a lithium iron phosphate battery pack according to claim 5, characterized in that: The base (1) is provided with a charging component (10), and the charging component (10) comprises: a charging box (101), which is installed on the left side wall of the base (1) close to the installation frame (2); a transformer (102), which is installed on the left side outer wall of the installation frame (2), and the charging box (101) is electrically connected to the transformer (102); and two charging cables (103), one of which is connected between the transformer (102) and the positive contact frame (901), and the other is connected between the transformer (102) and the negative contact frame (902), and the power transmitted by the charging box (101) is transformed by the transformer (102) and input into the positive contact frame (901) and the negative contact frame (902).

7. A consistency detection device for a lithium iron phosphate battery pack according to claim 6, characterized in that: The installation frame (2) is made of an insulating material, and the installation frame (2) cannot conduct electricity when the lithium iron phosphate battery (100) is charged or discharged.

8. A consistency detection device for a lithium iron phosphate battery pack according to claim 7, characterized in that: The sliding clamp (4) is provided with a clamping member (11), and the clamping member (11) comprises a clamping plate (111), a guide rod (112) and a spring (113). The clamping plate (111) is symmetrically slidably installed between the two side plates of each group of the sliding clamp (4) through the guide rod (112), and the spring (113) is sleeved on the guide rod (112) and located between the clamping plate (111) and the sliding clamp (4).

9. A consistency detection device for a lithium iron phosphate battery pack according to claim 8, characterized in that: The upper end of the clamping plate (111) is an arc-shaped inclined surface that bends upward, and a rubber elastic pad is provided on the surface of the clamping plate (111).

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